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2 parents b4ed246 + 01d1a78 commit bcd7041c72d7523af54a486b97db5e03c4a5c702 @mta1309 committed Mar 23, 2012
Showing with 21,540 additions and 11,487 deletions.
  1. +3 −0 archlvl.c
  2. +0 −4 channel.c
  3. +96 −60 chsc.c
  4. +29 −5 chsc.h
  5. +26 −8 cmdtab.h
  6. +45 −45 decNumber/ICU-license.html
  7. +3,911 −0 decNumber/decBasic.h
  8. +1,840 −0 decNumber/decCommon.h
  9. +437 −191 decNumber/decContext.c
  10. +255 −168 decNumber/decContext.h
  11. +1,185 −802 decNumber/decDPD.h
  12. +140 −0 decNumber/decDouble.c
  13. +155 −0 decNumber/decDouble.h
  14. +8,141 −6,646 decNumber/decNumber.c
  15. +182 −144 decNumber/decNumber.h
  16. +6 −3 decNumber/decNumber.rc
  17. +757 −200 decNumber/decNumberLocal.h
  18. +220 −223 decNumber/decPacked.c
  19. +52 −50 decNumber/decPacked.h
  20. +135 −0 decNumber/decQuad.c
  21. +177 −0 decNumber/decQuad.h
  22. +71 −0 decNumber/decSingle.c
  23. +86 −0 decNumber/decSingle.h
  24. +553 −565 decNumber/decimal128.c
  25. +81 −103 decNumber/decimal128.h
  26. +476 −481 decNumber/decimal32.c
  27. +81 −101 decNumber/decimal32.h
  28. +839 −839 decNumber/decimal64.c
  29. +83 −103 decNumber/decimal64.h
  30. BIN decNumber/decnumber.pdf
  31. +38 −0 decNumber/example1.c
  32. +52 −0 decNumber/example2.c
  33. +64 −0 decNumber/example3.c
  34. +61 −0 decNumber/example4.c
  35. +36 −0 decNumber/example5.c
  36. +61 −0 decNumber/example6.c
  37. +35 −0 decNumber/example7.c
  38. +39 −0 decNumber/example8.c
  39. +81 −85 decNumber/readme.txt
  40. +65 −0 decNumber_readme.txt
  41. +5 −2 esa390.h
  42. +9 −1 esame.c
  43. +362 −256 hRexx.c
  44. +5 −2 hRexx.h
  45. +206 −185 hRexx_o.c
  46. +213 −193 hRexx_r.c
  47. +85 −1 hRexx_readme.txt
  48. +1 −2 hstructs.h
  49. +9 −1 html/hercinst.html
  50. +1 −0 msgenu.h
  51. +1 −1 opcode.h
  52. +12 −3 qdio.c
  53. +37 −14 qeth.c
View
3 archlvl.c
@@ -273,6 +273,9 @@ FACILITY(LOGICAL_PARTITION,S370|ESA390|ZARCH, NONE, S370|ESA390|ZARCH, ALS0|ALS1
#if defined(_FEATURE_EMULATE_VM)
FACILITY(VIRTUAL_MACHINE, NONE, NONE, S370|ESA390|ZARCH, NONE)
#endif
+// #if defined(_FEATURE_QDIO_ASSIST)
+FACILITY(QDIO_ASSIST, Z390, NONE, Z390, ALS3)
+// #endif
{ NULL, 0, 0, 0, 0, 0 }
};
View
4 channel.c
@@ -1343,10 +1343,6 @@ DEVBLK *dev; /* -> Device control block */
int console = 0; /* 1 = console device reset */
int i;
- /* Reset channel subsystem back to default initial non-MSS state */
- sysblk.mss = FALSE; /* (not enabled by default) */
- sysblk.lcssmax = 0; /* (default to single lcss) */
-
/* reset sclp interface */
sclp_reset();
View
156 chsc.c
@@ -67,6 +67,7 @@ CHSC_RSP4 *chsc_rsp4 = (CHSC_RSP4 *)(chsc_rsp+1);
memset(chsc_rsp4, 0, sizeof(CHSC_RSP4) );
if((dev = find_device_by_subchan((LCSS_TO_SSID(lcss) << 16)|sch)))
{
+ int n;
chsc_rsp4->sch_val = 1;
if(dev->pmcw.flag5 & PMCW5_V)
chsc_rsp4->dev_val = 1;
@@ -76,10 +77,11 @@ CHSC_RSP4 *chsc_rsp4 = (CHSC_RSP4 *)(chsc_rsp+1);
chsc_rsp4->path_mask = dev->pmcw.pim;
STORE_HW(chsc_rsp4->sch, sch);
memcpy(chsc_rsp4->chpid, dev->pmcw.chpid, 8);
-#if 1 // ZZTEST
- chsc_rsp4->fla_valid_mask = 0x80;
- STORE_HW(chsc_rsp4->fla[0], ((dev->devnum & 0xff00) >> 8));
-#endif
+ if(dev->fla[0])
+ chsc_rsp4->fla_valid_mask = dev->pmcw.pim;
+ for(n = 0; n < 7; n++)
+ if(dev->pmcw.pim & (0x80 >> n))
+ STORE_HW(chsc_rsp4->fla[n], dev->fla[n]);
}
}
@@ -97,7 +99,7 @@ CHSC_RSP4 *chsc_rsp4 = (CHSC_RSP4 *)(chsc_rsp+1);
}
-#if 0 // ZZTEST
+#if 1 // ZZTEST
static int ARCH_DEP(chsc_get_cu_desc) (CHSC_REQ *chsc_req, CHSC_RSP *chsc_rsp)
{
U16 req_len, sch, f_sch, l_sch, rsp_len, lcss;
@@ -130,6 +132,25 @@ CHSC_RSP6 *chsc_rsp6 = (CHSC_RSP6 *)(chsc_rsp+1);
{
DEVBLK *dev;
memset(chsc_rsp6, 0, sizeof(CHSC_RSP6) );
+ if((dev = find_device_by_subchan((LCSS_TO_SSID(lcss) << 16)|sch)))
+ {
+ int n;
+
+ chsc_rsp6->sch_val = 1;
+ if(dev->pmcw.flag5 & PMCW5_V)
+ chsc_rsp6->dev_val = 1;
+ chsc_rsp6->st = (dev->pmcw.flag25 & PMCW25_TYPE) >> 5;
+
+ chsc_rsp6->fla_valid_mask = dev->pmcw.pim;
+
+ STORE_HW(chsc_rsp6->devnum,dev->devnum);
+
+ STORE_HW(chsc_rsp6->sch, sch);
+
+ memcpy(chsc_rsp6->chpid, dev->pmcw.chpid, 8);
+ for(n = 0; n < 7; n++)
+ STORE_HW(chsc_rsp6->fla[n], dev->fla[n]);
+ }
}
/* Store response length */
@@ -177,40 +198,47 @@ U16 req_len, rsp_len;
memset(chsc_rsp10->chsc_char, 0, sizeof(chsc_rsp10->chsc_char));
#if defined(FEATURE_REGION_RELOCATE)
- CHSC_AI(chsc_rsp10->general_char,2) |= CHSC_BI(2);
- CHSC_AI(chsc_rsp10->general_char,5) |= CHSC_BI(5);
+ CHSC_SB(chsc_rsp10->general_char,2);
+ CHSC_SB(chsc_rsp10->general_char,5);
#endif
#if defined(FEATURE_CANCEL_IO_FACILITY)
- CHSC_AI(chsc_rsp10->general_char,6) |= CHSC_BI(6);
+ CHSC_SB(chsc_rsp10->general_char,6);
#endif
- CHSC_AI(chsc_rsp10->general_char,7) |= CHSC_BI(7); /* Concurrent Sense */
- CHSC_AI(chsc_rsp10->general_char,12) |= CHSC_BI(12); /* Dynamic IO */
+ CHSC_SB(chsc_rsp10->general_char,7); /* Concurrent Sense */
+ CHSC_SB(chsc_rsp10->general_char,12); /* Dynamic IO */
#if defined(FEATURE_QUEUED_DIRECT_IO)
- CHSC_AI(chsc_rsp10->general_char,41) |= CHSC_BI(41); /* Adapter Interruption Facility */
+ CHSC_SB(chsc_rsp10->general_char,41); /* Adapter Interruption Facility */
+
+ CHSC_SB(chsc_rsp10->chsc_char,1); // 0x0002 Supported
+ CHSC_SB(chsc_rsp10->chsc_char,2); // 0x0006 Supported
+ CHSC_SB(chsc_rsp10->chsc_char,3); // 0x0004 Supported
+ CHSC_SB(chsc_rsp10->chsc_char,8); // 0x0024 Supported
+
+ if(FACILITY_ENABLED(QDIO_ASSIST, regs))
+ CHSC_SB(chsc_rsp10->general_char,61); /* QDIO Assist */
#endif /*defined(FEATURE_QUEUED_DIRECT_IO)*/
- if(sysblk.mss)
- CHSC_AI(chsc_rsp10->general_char,45) |= CHSC_BI(45); /* Multiple CSS */
-// CHSC_AI(chsc_rsp10->general_char,46) |= CHSC_BI(46); /* FCS */
-// CHSC_AI(chsc_rsp10->general_char,48) |= CHSC_BI(48); /* Ext MB */
+
#if defined(_FEATURE_QDIO_TDD)
if(FACILITY_ENABLED(QDIO_TDD, regs))
- CHSC_AI(chsc_rsp10->general_char,56) |= CHSC_BI(56); /* AIF Time Delay Disablement fac*/
+ CHSC_SB(chsc_rsp10->general_char,56); /* AIF Time Delay Disablement fac*/
#endif /*defined(_FEATURE_QDIO_TDD)*/
#if defined(_FEATURE_QEBSM)
if(FACILITY_ENABLED(QEBSM, regs))
- CHSC_AI(chsc_rsp10->general_char,58) |= CHSC_BI(58);
+ CHSC_SB(chsc_rsp10->general_char,58);
#endif /*defined(_FEATURE_QEBSM)*/
#if defined(_FEATURE_QDIO_THININT)
if(FACILITY_ENABLED(QDIO_THININT, regs))
- CHSC_AI(chsc_rsp10->general_char,67) |= CHSC_BI(67); /* OSA/FCP Thin interrupts */
+ CHSC_SB(chsc_rsp10->general_char,67); /* OSA/FCP Thin interrupts */
#endif /*defined(_FEATURE_QDIO_THININT)*/
-// CHSC_AI(chsc_rsp10->general_char,82) |= CHSC_BI(82); /* CIB */
-// CHSC_AI(chsc_rsp10->general_char,88) |= CHSC_BI(88); /* FCX */
-// CHSC_AI(chsc_rsp10->chsc_char,84) |= CHSC_BI(84); /* SECM */
-// CHSC_AI(chsc_rsp10->chsc_char,86) |= CHSC_BI(86); /* SCMC */
-// CHSC_AI(chsc_rsp10->chsc_char,107) |= CHSC_BI(107); /* Set Channel Subsystem Char */
-// CHSC_AI(chsc_rsp10->chsc_char,108) |= CHSC_BI(108); /* Fast CHSCs */
+// CHSC_SB(chsc_rsp10->general_char,82); /* CIB */
+// CHSC_SB(chsc_rsp10->general_char,88); /* FCX */
+
+// CHSC_SB(chsc_rsp10->general_char,45); /* Multiple CSS */
+// CHSC_SB(chsc_rsp10->chsc_char,84); /* SECM */
+// CHSC_SB(chsc_rsp10->chsc_char,86); /* SCMC */
+// CHSC_SB(chsc_rsp10->chsc_char,107); /* Set Channel Subsys Char */
+// CHSC_SB(chsc_rsp10->chsc_char,108); /* Fast CHSCs */
/* Store request OK */
STORE_HW(chsc_rsp->rsp,CHSC_REQ_OK);
@@ -274,6 +302,7 @@ CHSC_RSP24 *chsc_rsp24 = (CHSC_RSP24 *)(chsc_rsp+1);
}
+#if 0
static int ARCH_DEP(chsc_enable_facility) (CHSC_REQ *chsc_req, CHSC_RSP *chsc_rsp)
{
U16 req_len, rsp_len, facility;
@@ -284,33 +313,33 @@ CHSC_RSP31* chsc_rsp31 = (CHSC_RSP31*) (chsc_rsp+1);
/* Fetch length of request field and validate */
FETCH_HW( req_len, chsc_req31->length );
- if (0x0400 != req_len) {
- STORE_HW( chsc_rsp->length, sizeof(CHSC_RSP) );
- STORE_HW( chsc_rsp->rsp, CHSC_REQ_ERRREQ );
- STORE_FW( chsc_rsp->info, 0 );
- STORE_FW( chsc_rsp31->resv1, 0 );
- return 0;
- }
-
/* Calculate response length */
rsp_len = sizeof(CHSC_RSP) + sizeof(CHSC_RSP31);
+ if (req_len < rsp_len) {
+ STORE_HW( chsc_rsp->length, sizeof(CHSC_RSP));
+ STORE_HW( chsc_rsp->rsp, CHSC_REQ_ERRREQ);
+ STORE_FW( chsc_rsp->info, 0);
+ return 0;
+ }
+
/* Prepare the response */
- STORE_HW( chsc_rsp->length, rsp_len );
- STORE_FW( chsc_rsp->info, 0 );
- STORE_FW( chsc_rsp31->resv1, 0 );
+ STORE_HW( chsc_rsp->length, rsp_len );
+ STORE_FW( chsc_rsp->info, 0);
+ memset(chsc_rsp31, 0, sizeof(CHSC_RSP31) );
+// STORE_FW( chsc_rsp31->resv1, 0);
/* Fetch requested facility and enable it */
FETCH_HW( facility, chsc_req31->facility );
switch (facility)
{
case CHSC_REQ31_MSS:
- /* Enable Multiple Subchannel-Sets Facility */
- sysblk.mss = TRUE;
- sysblk.lcssmax = FEATURE_LCSS_MAX - 1;
- STORE_HW( chsc_rsp->rsp, CHSC_REQ_OK );
- break;
+// if(FACILITY_ENABLED_DEV(MCSS))
+ {
+ /* Enable Multiple Subchannel-Sets Facility */
+ STORE_HW( chsc_rsp->rsp, CHSC_REQ_OK );
+ }
default: /* Unknown Facility */
STORE_HW( chsc_rsp->rsp, CHSC_REQ_FACILITY );
@@ -319,6 +348,7 @@ CHSC_RSP31* chsc_rsp31 = (CHSC_RSP31*) (chsc_rsp+1);
return 0; /* call success */
}
+#endif
#if defined(_FEATURE_QDIO_THININT)
@@ -463,6 +493,8 @@ CHSC_RSP *chsc_rsp; /* Response structure*/
RRE(inst, regs, r1, r2);
+// ARCH_DEP(display_inst) (regs, inst);
+
PRIV_CHECK(regs);
SIE_INTERCEPT(regs);
@@ -492,44 +524,48 @@ CHSC_RSP *chsc_rsp; /* Response structure*/
switch(req) {
- case CHSC_REQ_SCHDESC:
- regs->psw.cc = ARCH_DEP(chsc_get_sch_desc) (chsc_req, chsc_rsp);
- break;
-
- case CHSC_REQ_CSSINFO:
- regs->psw.cc = ARCH_DEP(chsc_get_css_info) (regs, chsc_req, chsc_rsp);
- break;
-
- case CHSC_REQ_GETSSQD:
- regs->psw.cc = ARCH_DEP(chsc_get_ssqd) (chsc_req, chsc_rsp);
- break;
-
- case CHSC_REQ_ENFACIL:
- regs->psw.cc = ARCH_DEP(chsc_enable_facility) (chsc_req, chsc_rsp);
+ case CHSC_REQ_CHPDESC: // 0x0002
+ regs->psw.cc = ARCH_DEP(chsc_get_chp_desc) (chsc_req, chsc_rsp);
break;
- case CHSC_REQ_CHPDESC:
- regs->psw.cc = ARCH_DEP(chsc_get_chp_desc) (chsc_req, chsc_rsp);
+ case CHSC_REQ_SCHDESC: // 0x0004
+ regs->psw.cc = ARCH_DEP(chsc_get_sch_desc) (chsc_req, chsc_rsp);
break;
-#if 0 // ZZTEST
- case CHSC_REQ_CUDESC:
- case 0x0026:
+#if 1
+ case CHSC_REQ_CUDESC: // 0x0006
regs->psw.cc = ARCH_DEP(chsc_get_cu_desc) (chsc_req, chsc_rsp);
break;
#endif
+ case CHSC_REQ_CSSINFO: // 0x0010
+ regs->psw.cc = ARCH_DEP(chsc_get_css_info) (regs, chsc_req, chsc_rsp);
+ break;
+
#if defined(_FEATURE_QDIO_THININT)
- case CHSC_REQ_SETSSSI:
+ case CHSC_REQ_SETSSSI: // 0x0021
if(FACILITY_ENABLED(QDIO_THININT, regs))
{
regs->psw.cc = ARCH_DEP(chsc_set_sci) (chsc_req, chsc_rsp);
break;
}
+ else
+ goto chsc_error;
/* Fall through to unkown request if thinint not supported */
#endif /*defined(_FEATURE_QDIO_THININT)*/
+ case CHSC_REQ_GETSSQD: // 0x0024
+ regs->psw.cc = ARCH_DEP(chsc_get_ssqd) (chsc_req, chsc_rsp);
+ break;
+
+#if 0
+ case CHSC_REQ_ENFACIL: // 0x0031
+ regs->psw.cc = ARCH_DEP(chsc_enable_facility) (chsc_req, chsc_rsp);
+ break;
+#endif
+
default:
+ chsc_error:
PTT(PTT_CL_ERR,"*CHSC",regs->GR_L(r1),regs->GR_L(r2),regs->psw.IA_L);
if( HDC3(debug_chsc_unknown_request, chsc_rsp, chsc_req, regs) )
break;
View
34 chsc.h
@@ -13,8 +13,12 @@
#define _CHSC_H
-#define CHSC_AI(_array, _bitno) ((_array)[((_bitno)/32)][(((_bitno)%32)/8)])
-#define CHSC_BI(_bitno) (0x80 >> (((_bitno)%32)%8))
+#define _CHSC_AI(_array, _bitno) ((_array)[((_bitno)/32)][(((_bitno)%32)/8)])
+#define _CHSC_BI(_bitno) (0x80 >> (((_bitno)%32)%8))
+#define CHSC_SB(_array, _bitno) \
+ do { \
+ _CHSC_AI((_array), (_bitno)) |= _CHSC_BI((_bitno)); \
+ } while (0)
typedef struct _CHSC_REQ {
@@ -190,7 +194,25 @@ typedef struct _CHSC_RSP4 {
typedef struct _CHSC_RSP6 {
- BYTE cuinfo[128];
+ BYTE sch_val : 1; /* Subchannel valid */
+ BYTE dev_val : 1; /* Device number valid */
+ BYTE st : 3; /* Subchannel type */
+#define CHSC_RSP6_ST_IO 0 /* I/O Subchannel; all fields
+ have a meaning */
+#define CHSC_RSP6_ST_CHSC 1 /* CHSC Subchannel only sch_val
+ st and sch have a meaning */
+#define CHSC_RSP6_ST_MSG 2 /* MSG Subchannel; all fields
+ except unit_addr have a
+ meaning */
+#define CHSC_RPS6_ST_ADM 3 /* ADM Subchannel; Only sch_val
+ st and sch have a meaning */
+ BYTE zeros : 3;
+ BYTE fla_valid_mask; /* Link Address validty mask */
+ HWORD devnum; /* Control Unit Number */
+ HWORD resv1; /* Valid link mask */
+ HWORD sch; /* Subchannel number */
+ BYTE chpid[8]; /* Channel path array */
+ HWORD fla[8]; /* Full link address array */
} CHSC_RSP6;
@@ -234,11 +256,13 @@ typedef struct _CHSC_RSP24 {
HWORD qdioac2;
/* qdio adapter-characteristics-2 flag */
#define QETH_SNIFF_AVAIL 0x0008 /* Promisc mode avail */
+#define QETH_AC2_DATA_DIV_AVAILABLE 0x0010
+#define QETH_AC2_DATA_DIV_ENABLED 0x0002
DBLWRD sch_token;
BYTE mro;
BYTE mri;
- BYTE resv4;
- BYTE sbalic;
+ HWORD qdioac3;
+#define QETH_AC3_FORMAT2_CQ_AVAILABLE 0x8000
HWORD resv5;
BYTE resv6;
BYTE mmwc;
View
34 cmdtab.h
@@ -996,24 +996,42 @@
#define resume_cmd_desc "Resume hercules"
#if defined(ENABLE_OBJECT_REXX) || defined(ENABLE_REGINA_REXX)
+#if defined(ENABLE_OBJECT_REXX) && defined(ENABLE_REGINA_REXX)
#define rexx_cmd_desc "Enable/Disable/display Rexx interpreter settings"
#define rexx_cmd_help \
\
- "Format: 'rexx [option parms]'\n" \
+ "Format: 'rexx [option parms]'\n" \
"<none> - display rexx status\n" \
- "Disa[ble] - stop/disable rexx support\n" \
- "Ena[ble] regina - enable regina rexx\n" \
- "Ena[ble] oorexx - enable open object rexx\n" \
- "Start/Stop can be used instead of Enable/Disable\n" \
+ "sta[rt]/ena[ble] - enable rexx \n" \
+ "parms - package name oorexx/regina\n" \
+ " - <none> will start/enable the default Rexx package\n" \
+ "stop[p]/disa[ble]- stop/disable rexx support\n" \
+ "parms - <none>\n" \
"\n" \
"Path[s] - where to find rexx scripts\n" \
"Ext[ensions] - what extensions to use for rexx scripts autodetect \n" \
"Suf[fixes] - same as above\n" \
- "Msg[prefix] - set the prefix for normal messages\n" \
- "Err[prefix] - set the prefix for error messages\n" \
+ "Msgl[evel] - 0/1 disable/enable HHC17503I and HHC17504I messages \n" \
+ "Msgp[refix] - set the prefix for normal messages\n" \
+ "Errp[refix] - set the prefix for trace/error messages\n" \
"\n" \
"using reset as parameter will reset the above settings to the defaults\n"
-
+#else /* defined(ENABLE_OBJECT_REXX) && defined(ENABLE_REGINA_REXX) */
+#define rexx_cmd_desc "display Rexx interpreter settings"
+#define rexx_cmd_help \
+ \
+ "Format: 'rexx [option parms]'\n" \
+ "<none> - display rexx status\n" \
+ "\n" \
+ "Path[s] - where to find rexx scripts\n" \
+ "Ext[ensions] - what extensions to use for rexx scripts autodetect \n" \
+ "Suf[fixes] - same as above\n" \
+ "Msgl[evel] - 0/1 disable/enable HHC17503I and HHC17504I messages \n" \
+ "Msgp[refix] - set the prefix for normal messages\n" \
+ "Errp[refix] - set the prefix for trace/error messages\n" \
+ "\n" \
+ "using reset as parameter will reset the above settings to the defaults\n"
+#endif /* defined(ENABLE_OBJECT_REXX) && defined(ENABLE_REGINA_REXX) */
#endif /* defined(ENABLE_OBJECT_REXX) || defined(ENABLE_REGINA_REXX) */
#define rmmod_cmd_desc "Delete a module"
View
90 decNumber/ICU-license.html
@@ -1,45 +1,45 @@
-<html>
-
-<head>
-<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></meta>
-<title>ICU License - ICU 1.8.1 and later</title>
-</head>
-
-<body>
-<h1>ICU License - ICU 1.8.1 and later</h1>
-<pre>
-COPYRIGHT AND PERMISSION NOTICE
-
-Copyright (c) 1995-2005 International Business Machines Corporation and others
-All rights reserved.
-
-Permission is hereby granted, free of charge, to any person obtaining a
-copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, and/or sell copies of the Software, and to permit persons
-to whom the Software is furnished to do so, provided that the above
-copyright notice(s) and this permission notice appear in all copies of
-the Software and that both the above copyright notice(s) and this
-permission notice appear in supporting documentation.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
-OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
-HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
-INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
-FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
-NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
-WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-Except as contained in this notice, the name of a copyright holder
-shall not be used in advertising or otherwise to promote the sale, use
-or other dealings in this Software without prior written authorization
-of the copyright holder.
-
---------------------------------------------------------------------------------
-All trademarks and registered trademarks mentioned herein are the property of their respective owners.
-</pre>
-</body>
-</html>
+<html>
+
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></meta>
+<title>ICU License - ICU 1.8.1 and later</title>
+</head>
+
+<body>
+<h1>ICU License - ICU 1.8.1 and later</h1>
+<pre>
+COPYRIGHT AND PERMISSION NOTICE
+
+Copyright (c) 1995-2005 International Business Machines Corporation and others
+All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, and/or sell copies of the Software, and to permit persons
+to whom the Software is furnished to do so, provided that the above
+copyright notice(s) and this permission notice appear in all copies of
+the Software and that both the above copyright notice(s) and this
+permission notice appear in supporting documentation.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
+INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
+FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+Except as contained in this notice, the name of a copyright holder
+shall not be used in advertising or otherwise to promote the sale, use
+or other dealings in this Software without prior written authorization
+of the copyright holder.
+
+--------------------------------------------------------------------------------
+All trademarks and registered trademarks mentioned herein are the property of their respective owners.
+</pre>
+</body>
+</html>
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3,911 decNumber/decBasic.h
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1,840 decNumber/decCommon.h
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+#if !defined(DECCOMMON)
+#define DECCOMMON
+
+/* ------------------------------------------------------------------ */
+/* decCommon.h -- common code for all three fixed-size types */
+/* ------------------------------------------------------------------ */
+/* Copyright (c) IBM Corporation, 2000, 2010. All rights reserved. */
+/* */
+/* This software is made available under the terms of the */
+/* ICU License -- ICU 1.8.1 and later. */
+/* */
+/* The description and User's Guide ("The decNumber C Library") for */
+/* this software is included in the package as decNumber.pdf. This */
+/* document is also available in HTML, together with specifications, */
+/* testcases, and Web links, on the General Decimal Arithmetic page. */
+/* */
+/* Please send comments, suggestions, and corrections to the author: */
+/* mfc@uk.ibm.com */
+/* Mike Cowlishaw, IBM Fellow */
+/* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */
+/* ------------------------------------------------------------------ */
+/* This module comprises code that is shared between all the formats */
+/* (decSingle, decDouble, and decQuad); it includes set and extract */
+/* of format components, widening, narrowing, and string conversions. */
+/* */
+/* Unlike decNumber, parameterization takes place at compile time */
+/* rather than at runtime. The parameters are set in the decDouble.c */
+/* (etc.) files, which then include this one to produce the compiled */
+/* code. The functions here, therefore, are code shared between */
+/* multiple formats. */
+/* ------------------------------------------------------------------ */
+// Names here refer to decFloat rather than to decDouble, etc., and
+// the functions are in strict alphabetical order.
+// Constants, tables, and debug function(s) are included only for QUAD
+// (which will always be compiled if DOUBLE or SINGLE are used).
+//
+// Whenever a decContext is used, only the status may be set (using
+// OR) or the rounding mode read; all other fields are ignored and
+// untouched.
+
+// names for simpler testing and default context
+#if DECPMAX==7
+ #define SINGLE 1
+ #define DOUBLE 0
+ #define QUAD 0
+ #define DEFCONTEXT DEC_INIT_DECIMAL32
+#elif DECPMAX==16
+ #define SINGLE 0
+ #define DOUBLE 1
+ #define QUAD 0
+ #define DEFCONTEXT DEC_INIT_DECIMAL64
+#elif DECPMAX==34
+ #define SINGLE 0
+ #define DOUBLE 0
+ #define QUAD 1
+ #define DEFCONTEXT DEC_INIT_DECIMAL128
+#else
+ #error Unexpected DECPMAX value
+#endif
+
+/* Assertions */
+
+#if DECPMAX!=7 && DECPMAX!=16 && DECPMAX!=34
+ #error Unexpected Pmax (DECPMAX) value for this module
+#endif
+
+// Assert facts about digit characters, etc.
+#if ('9'&0x0f)!=9
+ #error This module assumes characters are of the form 0b....nnnn
+ // where .... are don't care 4 bits and nnnn is 0000 through 1001
+#endif
+#if ('9'&0xf0)==('.'&0xf0)
+ #error This module assumes '.' has a different mask than a digit
+#endif
+
+// Assert ToString lay-out conditions
+#if DECSTRING<DECPMAX+9
+ #error ToString needs at least 8 characters for lead-in and dot
+#endif
+#if DECPMAX+DECEMAXD+5 > DECSTRING
+ #error Exponent form can be too long for ToString to lay out safely
+#endif
+#if DECEMAXD > 4
+ #error Exponent form is too long for ToString to lay out
+ // Note: code for up to 9 digits exists in archives [decOct]
+#endif
+
+/* Private functions used here and possibly in decBasic.h, etc. */
+static decFloat * decFinalize(decFloat *, bcdnum *, decContext *);
+static Flag decBiStr(const char *, const char *, const char *);
+
+/* Macros and private tables; those which are not format-dependent */
+/* are only included if decQuad is being built. */
+
+/* ------------------------------------------------------------------ */
+/* Combination field lookup tables (uInts to save measurable work) */
+/* */
+/* DECCOMBEXP - 2 most-significant-bits of exponent (00, 01, or */
+/* 10), shifted left for format, or DECFLOAT_Inf/NaN */
+/* DECCOMBWEXP - The same, for the next-wider format (unless QUAD) */
+/* DECCOMBMSD - 4-bit most-significant-digit */
+/* [0 if the index is a special (Infinity or NaN)] */
+/* DECCOMBFROM - 5-bit combination field from EXP top bits and MSD */
+/* (placed in uInt so no shift is needed) */
+/* */
+/* DECCOMBEXP, DECCOMBWEXP, and DECCOMBMSD are indexed by the sign */
+/* and 5-bit combination field (0-63, the second half of the table */
+/* identical to the first half) */
+/* DECCOMBFROM is indexed by expTopTwoBits*16 + msd */
+/* */
+/* DECCOMBMSD and DECCOMBFROM are not format-dependent and so are */
+/* only included once, when QUAD is being built */
+/* ------------------------------------------------------------------ */
+static const uInt DECCOMBEXP[64]={
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 1<<DECECONL, 1<<DECECONL, 1<<DECECONL, 1<<DECECONL,
+ 1<<DECECONL, 1<<DECECONL, 1<<DECECONL, 1<<DECECONL,
+ 2<<DECECONL, 2<<DECECONL, 2<<DECECONL, 2<<DECECONL,
+ 2<<DECECONL, 2<<DECECONL, 2<<DECECONL, 2<<DECECONL,
+ 0, 0, 1<<DECECONL, 1<<DECECONL,
+ 2<<DECECONL, 2<<DECECONL, DECFLOAT_Inf, DECFLOAT_NaN,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 1<<DECECONL, 1<<DECECONL, 1<<DECECONL, 1<<DECECONL,
+ 1<<DECECONL, 1<<DECECONL, 1<<DECECONL, 1<<DECECONL,
+ 2<<DECECONL, 2<<DECECONL, 2<<DECECONL, 2<<DECECONL,
+ 2<<DECECONL, 2<<DECECONL, 2<<DECECONL, 2<<DECECONL,
+ 0, 0, 1<<DECECONL, 1<<DECECONL,
+ 2<<DECECONL, 2<<DECECONL, DECFLOAT_Inf, DECFLOAT_NaN};
+#if !QUAD
+static const uInt DECCOMBWEXP[64]={
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 1<<DECWECONL, 1<<DECWECONL, 1<<DECWECONL, 1<<DECWECONL,
+ 1<<DECWECONL, 1<<DECWECONL, 1<<DECWECONL, 1<<DECWECONL,
+ 2<<DECWECONL, 2<<DECWECONL, 2<<DECWECONL, 2<<DECWECONL,
+ 2<<DECWECONL, 2<<DECWECONL, 2<<DECWECONL, 2<<DECWECONL,
+ 0, 0, 1<<DECWECONL, 1<<DECWECONL,
+ 2<<DECWECONL, 2<<DECWECONL, DECFLOAT_Inf, DECFLOAT_NaN,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 1<<DECWECONL, 1<<DECWECONL, 1<<DECWECONL, 1<<DECWECONL,
+ 1<<DECWECONL, 1<<DECWECONL, 1<<DECWECONL, 1<<DECWECONL,
+ 2<<DECWECONL, 2<<DECWECONL, 2<<DECWECONL, 2<<DECWECONL,
+ 2<<DECWECONL, 2<<DECWECONL, 2<<DECWECONL, 2<<DECWECONL,
+ 0, 0, 1<<DECWECONL, 1<<DECWECONL,
+ 2<<DECWECONL, 2<<DECWECONL, DECFLOAT_Inf, DECFLOAT_NaN};
+#endif
+
+#if QUAD
+const uInt DECCOMBMSD[64]={
+ 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7,
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 9, 8, 9, 0, 0,
+ 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7,
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 9, 8, 9, 0, 0};
+
+const uInt DECCOMBFROM[48]={
+ 0x00000000, 0x04000000, 0x08000000, 0x0C000000, 0x10000000, 0x14000000,
+ 0x18000000, 0x1C000000, 0x60000000, 0x64000000, 0x00000000, 0x00000000,
+ 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x20000000, 0x24000000,
+ 0x28000000, 0x2C000000, 0x30000000, 0x34000000, 0x38000000, 0x3C000000,
+ 0x68000000, 0x6C000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+ 0x00000000, 0x00000000, 0x40000000, 0x44000000, 0x48000000, 0x4C000000,
+ 0x50000000, 0x54000000, 0x58000000, 0x5C000000, 0x70000000, 0x74000000,
+ 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000};
+
+/* ------------------------------------------------------------------ */
+/* Request and include the tables to use for conversions */
+/* ------------------------------------------------------------------ */
+#define DEC_BCD2DPD 1 // 0-0x999 -> DPD
+#define DEC_BIN2DPD 1 // 0-999 -> DPD
+#define DEC_BIN2BCD8 1 // 0-999 -> ddd, len
+#define DEC_DPD2BCD8 1 // DPD -> ddd, len
+#define DEC_DPD2BIN 1 // DPD -> 0-999
+#define DEC_DPD2BINK 1 // DPD -> 0-999000
+#define DEC_DPD2BINM 1 // DPD -> 0-999000000
+#include "decDPD.h" // source of the lookup tables
+
+#endif
+
+/* ----------------------------------------------------------------- */
+/* decBiStr -- compare string with pairwise options */
+/* */
+/* targ is the string to compare */
+/* str1 is one of the strings to compare against (length may be 0) */
+/* str2 is the other; it must be the same length as str1 */
+/* */
+/* returns 1 if strings compare equal, (that is, targ is the same */
+/* length as str1 and str2, and each character of targ is in one */
+/* of str1 or str2 in the corresponding position), or 0 otherwise */
+/* */
+/* This is used for generic caseless compare, including the awkward */
+/* case of the Turkish dotted and dotless Is. Use as (for example): */
+/* if (decBiStr(test, "mike", "MIKE")) ... */
+/* ----------------------------------------------------------------- */
+static Flag decBiStr(const char *targ, const char *str1, const char *str2) {
+ for (;;targ++, str1++, str2++) {
+ if (*targ!=*str1 && *targ!=*str2) return 0;
+ // *targ has a match in one (or both, if terminator)
+ if (*targ=='\0') break;
+ } // forever
+ return 1;
+ } // decBiStr
+
+/* ------------------------------------------------------------------ */
+/* decFinalize -- adjust and store a final result */
+/* */
+/* df is the decFloat format number which gets the final result */
+/* num is the descriptor of the number to be checked and encoded */
+/* [its values, including the coefficient, may be modified] */
+/* set is the context to use */
+/* returns df */
+/* */
+/* The num descriptor may point to a bcd8 string of any length; this */
+/* string may have leading insignificant zeros. If it has more than */
+/* DECPMAX digits then the final digit can be a round-for-reround */
+/* digit (i.e., it may include a sticky bit residue). */
+/* */
+/* The exponent (q) may be one of the codes for a special value and */
+/* can be up to 999999999 for conversion from string. */
+/* */
+/* No error is possible, but Inexact, Underflow, and/or Overflow may */
+/* be set. */
+/* ------------------------------------------------------------------ */
+// Constant whose size varies with format; also the check for surprises
+static uByte allnines[DECPMAX]=
+#if SINGLE
+ {9, 9, 9, 9, 9, 9, 9};
+#elif DOUBLE
+ {9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9};
+#elif QUAD
+ {9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
+ 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9};
+#endif
+
+static decFloat * decFinalize(decFloat *df, bcdnum *num,
+ decContext *set) {
+ uByte *ub; // work
+ uInt dpd; // ..
+ uInt uiwork; // for macros
+ uByte *umsd=num->msd; // local copy
+ uByte *ulsd=num->lsd; // ..
+ uInt encode; // encoding accumulator
+ Int length; // coefficient length
+
+ #if DECCHECK
+ Int clen=ulsd-umsd+1;
+ #if QUAD
+ #define COEXTRA 2 // extra-long coefficent
+ #else
+ #define COEXTRA 0
+ #endif
+ if (clen<1 || clen>DECPMAX*3+2+COEXTRA)
+ printf("decFinalize: suspect coefficient [length=%ld]\n", (LI)clen);
+ if (num->sign!=0 && num->sign!=DECFLOAT_Sign)
+ printf("decFinalize: bad sign [%08lx]\n", (LI)num->sign);
+ if (!EXPISSPECIAL(num->exponent)
+ && (num->exponent>1999999999 || num->exponent<-1999999999))
+ printf("decFinalize: improbable exponent [%ld]\n", (LI)num->exponent);
+ // decShowNum(num, "final");
+ #endif
+
+ // A special will have an 'exponent' which is very positive and a
+ // coefficient < DECPMAX
+ length=(uInt)(ulsd-umsd+1); // coefficient length
+
+ if (!NUMISSPECIAL(num)) {
+ Int drop; // digits to be dropped
+ // skip leading insignificant zeros to calculate an exact length
+ // [this is quite expensive]
+ if (*umsd==0) {
+ for (; umsd+3<ulsd && UBTOUI(umsd)==0;) umsd+=4;
+ for (; *umsd==0 && umsd<ulsd;) umsd++;
+ length=ulsd-umsd+1; // recalculate
+ }
+ drop=MAXI(length-DECPMAX, DECQTINY-num->exponent);
+ // drop can now be > digits for bottom-clamp (subnormal) cases
+ if (drop>0) { // rounding needed
+ // (decFloatQuantize has very similar code to this, so any
+ // changes may need to be made there, too)
+ uByte *roundat; // -> re-round digit
+ uByte reround; // reround value
+ // printf("Rounding; drop=%ld\n", (LI)drop);
+
+ num->exponent+=drop; // always update exponent
+
+ // Three cases here:
+ // 1. new LSD is in coefficient (almost always)
+ // 2. new LSD is digit to left of coefficient (so MSD is
+ // round-for-reround digit)
+ // 3. new LSD is to left of case 2 (whole coefficient is sticky)
+ // [duplicate check-stickies code to save a test]
+ // [by-digit check for stickies as runs of zeros are rare]
+ if (drop<length) { // NB lengths not addresses
+ roundat=umsd+length-drop;
+ reround=*roundat;
+ for (ub=roundat+1; ub<=ulsd; ub++) {
+ if (*ub!=0) { // non-zero to be discarded
+ reround=DECSTICKYTAB[reround]; // apply sticky bit
+ break; // [remainder don't-care]
+ }
+ } // check stickies
+ ulsd=roundat-1; // new LSD
+ }
+ else { // edge case
+ if (drop==length) {
+ roundat=umsd;
+ reround=*roundat;
+ }
+ else {
+ roundat=umsd-1;
+ reround=0;
+ }
+ for (ub=roundat+1; ub<=ulsd; ub++) {
+ if (*ub!=0) { // non-zero to be discarded
+ reround=DECSTICKYTAB[reround]; // apply sticky bit
+ break; // [remainder don't-care]
+ }
+ } // check stickies
+ *umsd=0; // coefficient is a 0
+ ulsd=umsd; // ..
+ }
+
+ if (reround!=0) { // discarding non-zero
+ uInt bump=0;
+ set->status|=DEC_Inexact;
+ // if adjusted exponent [exp+digits-1] is < EMIN then num is
+ // subnormal -- so raise Underflow
+ if (num->exponent<DECEMIN && (num->exponent+(ulsd-umsd+1)-1)<DECEMIN)
+ set->status|=DEC_Underflow;
+
+ // next decide whether increment of the coefficient is needed
+ if (set->round==DEC_ROUND_HALF_EVEN) { // fastpath slowest case
+ if (reround>5) bump=1; // >0.5 goes up
+ else if (reround==5) // exactly 0.5000 ..
+ bump=*ulsd & 0x01; // .. up iff [new] lsd is odd
+ } // r-h-e
+ else switch (set->round) {
+ case DEC_ROUND_DOWN: {
+ // no change
+ break;} // r-d
+ case DEC_ROUND_HALF_DOWN: {
+ if (reround>5) bump=1;
+ break;} // r-h-d
+ case DEC_ROUND_HALF_UP: {
+ if (reround>=5) bump=1;
+ break;} // r-h-u
+ case DEC_ROUND_UP: {
+ if (reround>0) bump=1;
+ break;} // r-u
+ case DEC_ROUND_CEILING: {
+ // same as _UP for positive numbers, and as _DOWN for negatives
+ if (!num->sign && reround>0) bump=1;
+ break;} // r-c
+ case DEC_ROUND_FLOOR: {
+ // same as _UP for negative numbers, and as _DOWN for positive
+ // [negative reround cannot occur on 0]
+ if (num->sign && reround>0) bump=1;
+ break;} // r-f
+ case DEC_ROUND_05UP: {
+ if (reround>0) { // anything out there is 'sticky'
+ // bump iff lsd=0 or 5; this cannot carry so it could be
+ // effected immediately with no bump -- but the code
+ // is clearer if this is done the same way as the others
+ if (*ulsd==0 || *ulsd==5) bump=1;
+ }
+ break;} // r-r
+ default: { // e.g., DEC_ROUND_MAX
+ set->status|=DEC_Invalid_context;
+ #if DECCHECK
+ printf("Unknown rounding mode: %ld\n", (LI)set->round);
+ #endif
+ break;}
+ } // switch (not r-h-e)
+ // printf("ReRound: %ld bump: %ld\n", (LI)reround, (LI)bump);
+
+ if (bump!=0) { // need increment
+ // increment the coefficient; this might end up with 1000...
+ // (after the all nines case)
+ ub=ulsd;
+ for(; ub-3>=umsd && UBTOUI(ub-3)==0x09090909; ub-=4) {
+ UBFROMUI(ub-3, 0); // to 00000000
+ }
+ // [note ub could now be to left of msd, and it is not safe
+ // to write to the the left of the msd]
+ // now at most 3 digits left to non-9 (usually just the one)
+ for (; ub>=umsd; *ub=0, ub--) {
+ if (*ub==9) continue; // carry
+ *ub+=1;
+ break;
+ }
+ if (ub<umsd) { // had all-nines
+ *umsd=1; // coefficient to 1000...
+ // usually the 1000... coefficient can be used as-is
+ if ((ulsd-umsd+1)==DECPMAX) {
+ num->exponent++;
+ }
+ else {
+ // if coefficient is shorter than Pmax then num is
+ // subnormal, so extend it; this is safe as drop>0
+ // (or, if the coefficient was supplied above, it could
+ // not be 9); this may make the result normal.
+ ulsd++;
+ *ulsd=0;
+ // [exponent unchanged]
+ #if DECCHECK
+ if (num->exponent!=DECQTINY) // sanity check
+ printf("decFinalize: bad all-nines extend [^%ld, %ld]\n",
+ (LI)num->exponent, (LI)(ulsd-umsd+1));
+ #endif
+ } // subnormal extend
+ } // had all-nines
+ } // bump needed
+ } // inexact rounding
+
+ length=ulsd-umsd+1; // recalculate (may be <DECPMAX)
+ } // need round (drop>0)
+
+ // The coefficient will now fit and has final length unless overflow
+ // decShowNum(num, "rounded");
+
+ // if exponent is >=emax may have to clamp, overflow, or fold-down
+ if (num->exponent>DECEMAX-(DECPMAX-1)) { // is edge case
+ // printf("overflow checks...\n");
+ if (*ulsd==0 && ulsd==umsd) { // have zero
+ num->exponent=DECEMAX-(DECPMAX-1); // clamp to max
+ }
+ else if ((num->exponent+length-1)>DECEMAX) { // > Nmax
+ // Overflow -- these could go straight to encoding, here, but
+ // instead num is adjusted to keep the code cleaner
+ Flag needmax=0; // 1 for finite result
+ set->status|=(DEC_Overflow | DEC_Inexact);
+ switch (set->round) {
+ case DEC_ROUND_DOWN: {
+ needmax=1; // never Infinity
+ break;} // r-d
+ case DEC_ROUND_05UP: {
+ needmax=1; // never Infinity
+ break;} // r-05
+ case DEC_ROUND_CEILING: {
+ if (num->sign) needmax=1; // Infinity iff non-negative
+ break;} // r-c
+ case DEC_ROUND_FLOOR: {
+ if (!num->sign) needmax=1; // Infinity iff negative
+ break;} // r-f
+ default: break; // Infinity in all other cases
+ }
+ if (!needmax) { // easy .. set Infinity
+ num->exponent=DECFLOAT_Inf;
+ *umsd=0; // be clean: coefficient to 0
+ ulsd=umsd; // ..
+ }
+ else { // return Nmax
+ umsd=allnines; // use constant array
+ ulsd=allnines+DECPMAX-1;
+ num->exponent=DECEMAX-(DECPMAX-1);
+ }
+ }
+ else { // no overflow but non-zero and may have to fold-down
+ Int shift=num->exponent-(DECEMAX-(DECPMAX-1));
+ if (shift>0) { // fold-down needed
+ // fold down needed; must copy to buffer in order to pad
+ // with zeros safely; fortunately this is not the worst case
+ // path because cannot have had a round
+ uByte buffer[ROUNDUP(DECPMAX+3, 4)]; // [+3 allows uInt padding]
+ uByte *s=umsd; // source
+ uByte *t=buffer; // safe target
+ uByte *tlsd=buffer+(ulsd-umsd)+shift; // target LSD
+ // printf("folddown shift=%ld\n", (LI)shift);
+ for (; s<=ulsd; s+=4, t+=4) UBFROMUI(t, UBTOUI(s));
+ for (t=tlsd-shift+1; t<=tlsd; t+=4) UBFROMUI(t, 0); // pad 0s
+ num->exponent-=shift;
+ umsd=buffer;
+ ulsd=tlsd;
+ }
+ } // fold-down?
+ length=ulsd-umsd+1; // recalculate length
+ } // high-end edge case
+ } // finite number
+
+ /*------------------------------------------------------------------*/
+ /* At this point the result will properly fit the decFloat */
+ /* encoding, and it can be encoded with no possibility of error */
+ /*------------------------------------------------------------------*/
+ // Following code does not alter coefficient (could be allnines array)
+
+ // fast path possible when DECPMAX digits
+ if (length==DECPMAX) {
+ return decFloatFromBCD(df, num->exponent, umsd, num->sign);
+ } // full-length
+
+ // slower path when not a full-length number; must care about length
+ // [coefficient length here will be < DECPMAX]
+ if (!NUMISSPECIAL(num)) { // is still finite
+ // encode the combination field and exponent continuation
+ uInt uexp=(uInt)(num->exponent+DECBIAS); // biased exponent
+ uInt code=(uexp>>DECECONL)<<4; // top two bits of exp
+ // [msd==0]
+ // look up the combination field and make high word
+ encode=DECCOMBFROM[code]; // indexed by (0-2)*16+msd
+ encode|=(uexp<<(32-6-DECECONL)) & 0x03ffffff; // exponent continuation
+ }
+ else encode=num->exponent; // special [already in word]
+ encode|=num->sign; // add sign
+
+ // private macro to extract a declet, n (where 0<=n<DECLETS and 0
+ // refers to the declet from the least significant three digits)
+ // and put the corresponding DPD code into dpd. Access to umsd and
+ // ulsd (pointers to the most and least significant digit of the
+ // variable-length coefficient) is assumed, along with use of a
+ // working pointer, uInt *ub.
+ // As not full-length then chances are there are many leading zeros
+ // [and there may be a partial triad]
+ #define getDPDt(dpd, n) ub=ulsd-(3*(n))-2; \
+ if (ub<umsd-2) dpd=0; \
+ else if (ub>=umsd) dpd=BCD2DPD[(*ub*256)+(*(ub+1)*16)+*(ub+2)]; \
+ else {dpd=*(ub+2); if (ub+1==umsd) dpd+=*(ub+1)*16; dpd=BCD2DPD[dpd];}
+
+ // place the declets in the encoding words and copy to result (df),
+ // according to endianness; in all cases complete the sign word
+ // first
+ #if DECPMAX==7
+ getDPDt(dpd, 1);
+ encode|=dpd<<10;
+ getDPDt(dpd, 0);
+ encode|=dpd;
+ DFWORD(df, 0)=encode; // just the one word
+
+ #elif DECPMAX==16
+ getDPDt(dpd, 4); encode|=dpd<<8;
+ getDPDt(dpd, 3); encode|=dpd>>2;
+ DFWORD(df, 0)=encode;
+ encode=dpd<<30;
+ getDPDt(dpd, 2); encode|=dpd<<20;
+ getDPDt(dpd, 1); encode|=dpd<<10;
+ getDPDt(dpd, 0); encode|=dpd;
+ DFWORD(df, 1)=encode;
+
+ #elif DECPMAX==34
+ getDPDt(dpd,10); encode|=dpd<<4;
+ getDPDt(dpd, 9); encode|=dpd>>6;
+ DFWORD(df, 0)=encode;
+
+ encode=dpd<<26;
+ getDPDt(dpd, 8); encode|=dpd<<16;
+ getDPDt(dpd, 7); encode|=dpd<<6;
+ getDPDt(dpd, 6); encode|=dpd>>4;
+ DFWORD(df, 1)=encode;
+
+ encode=dpd<<28;
+ getDPDt(dpd, 5); encode|=dpd<<18;
+ getDPDt(dpd, 4); encode|=dpd<<8;
+ getDPDt(dpd, 3); encode|=dpd>>2;
+ DFWORD(df, 2)=encode;
+
+ encode=dpd<<30;
+ getDPDt(dpd, 2); encode|=dpd<<20;
+ getDPDt(dpd, 1); encode|=dpd<<10;
+ getDPDt(dpd, 0); encode|=dpd;
+ DFWORD(df, 3)=encode;
+ #endif
+
+ // printf("Status: %08lx\n", (LI)set->status);
+ // decFloatShow(df, "final2");
+ return df;
+ } // decFinalize
+
+/* ------------------------------------------------------------------ */
+/* decFloatFromBCD -- set decFloat from exponent, BCD8, and sign */
+/* */
+/* df is the target decFloat */
+/* exp is the in-range unbiased exponent, q, or a special value in */
+/* the form returned by decFloatGetExponent */
+/* bcdar holds DECPMAX digits to set the coefficient from, one */
+/* digit in each byte (BCD8 encoding); the first (MSD) is ignored */
+/* if df is a NaN; all are ignored if df is infinite. */
+/* All bytes must be in 0-9; results are undefined otherwise. */
+/* sig is DECFLOAT_Sign to set the sign bit, 0 otherwise */
+/* returns df, which will be canonical */
+/* */
+/* No error is possible, and no status will be set. */
+/* ------------------------------------------------------------------ */
+decFloat * decFloatFromBCD(decFloat *df, Int exp, const uByte *bcdar,
+ Int sig) {
+ uInt encode, dpd; // work
+ const uByte *ub; // ..
+
+ if (EXPISSPECIAL(exp)) encode=exp|sig;// specials already encoded
+ else { // is finite
+ // encode the combination field and exponent continuation
+ uInt uexp=(uInt)(exp+DECBIAS); // biased exponent
+ uInt code=(uexp>>DECECONL)<<4; // top two bits of exp
+ code+=bcdar[0]; // add msd
+ // look up the combination field and make high word
+ encode=DECCOMBFROM[code]|sig; // indexed by (0-2)*16+msd
+ encode|=(uexp<<(32-6-DECECONL)) & 0x03ffffff; // exponent continuation
+ }
+
+ // private macro to extract a declet, n (where 0<=n<DECLETS and 0
+ // refers to the declet from the least significant three digits)
+ // and put the corresponding DPD code into dpd.
+ // Use of a working pointer, uInt *ub, is assumed.
+
+ #define getDPDb(dpd, n) ub=bcdar+DECPMAX-1-(3*(n))-2; \
+ dpd=BCD2DPD[(*ub*256)+(*(ub+1)*16)+*(ub+2)];
+
+ // place the declets in the encoding words and copy to result (df),
+ // according to endianness; in all cases complete the sign word
+ // first
+ #if DECPMAX==7
+ getDPDb(dpd, 1);
+ encode|=dpd<<10;
+ getDPDb(dpd, 0);
+ encode|=dpd;
+ DFWORD(df, 0)=encode; // just the one word
+
+ #elif DECPMAX==16
+ getDPDb(dpd, 4); encode|=dpd<<8;
+ getDPDb(dpd, 3); encode|=dpd>>2;
+ DFWORD(df, 0)=encode;
+ encode=dpd<<30;
+ getDPDb(dpd, 2); encode|=dpd<<20;
+ getDPDb(dpd, 1); encode|=dpd<<10;
+ getDPDb(dpd, 0); encode|=dpd;
+ DFWORD(df, 1)=encode;
+
+ #elif DECPMAX==34
+ getDPDb(dpd,10); encode|=dpd<<4;
+ getDPDb(dpd, 9); encode|=dpd>>6;
+ DFWORD(df, 0)=encode;
+
+ encode=dpd<<26;
+ getDPDb(dpd, 8); encode|=dpd<<16;
+ getDPDb(dpd, 7); encode|=dpd<<6;
+ getDPDb(dpd, 6); encode|=dpd>>4;
+ DFWORD(df, 1)=encode;
+
+ encode=dpd<<28;
+ getDPDb(dpd, 5); encode|=dpd<<18;
+ getDPDb(dpd, 4); encode|=dpd<<8;
+ getDPDb(dpd, 3); encode|=dpd>>2;
+ DFWORD(df, 2)=encode;
+
+ encode=dpd<<30;
+ getDPDb(dpd, 2); encode|=dpd<<20;
+ getDPDb(dpd, 1); encode|=dpd<<10;
+ getDPDb(dpd, 0); encode|=dpd;
+ DFWORD(df, 3)=encode;
+ #endif
+ // decFloatShow(df, "fromB");
+ return df;
+ } // decFloatFromBCD
+
+/* ------------------------------------------------------------------ */
+/* decFloatFromPacked -- set decFloat from exponent and packed BCD */
+/* */
+/* df is the target decFloat */
+/* exp is the in-range unbiased exponent, q, or a special value in */
+/* the form returned by decFloatGetExponent */
+/* packed holds DECPMAX packed decimal digits plus a sign nibble */
+/* (all 6 codes are OK); the first (MSD) is ignored if df is a NaN */
+/* and all except sign are ignored if df is infinite. For DOUBLE */
+/* and QUAD the first (pad) nibble is also ignored in all cases. */
+/* All coefficient nibbles must be in 0-9 and sign in A-F; results */
+/* are undefined otherwise. */
+/* returns df, which will be canonical */
+/* */
+/* No error is possible, and no status will be set. */
+/* ------------------------------------------------------------------ */
+decFloat * decFloatFromPacked(decFloat *df, Int exp, const uByte *packed) {
+ uByte bcdar[DECPMAX+2]; // work [+1 for pad, +1 for sign]
+ const uByte *ip; // ..
+ uByte *op; // ..
+ Int sig=0; // sign
+
+ // expand coefficient and sign to BCDAR
+ #if SINGLE
+ op=bcdar+1; // no pad digit
+ #else
+ op=bcdar; // first (pad) digit ignored
+ #endif
+ for (ip=packed; ip<packed+((DECPMAX+2)/2); ip++) {
+ *op++=*ip>>4;
+ *op++=(uByte)(*ip&0x0f); // [final nibble is sign]
+ }
+ op--; // -> sign byte
+ if (*op==DECPMINUS || *op==DECPMINUSALT) sig=DECFLOAT_Sign;
+
+ if (EXPISSPECIAL(exp)) { // Infinity or NaN
+ if (!EXPISINF(exp)) bcdar[1]=0; // a NaN: ignore MSD
+ else memset(bcdar+1, 0, DECPMAX); // Infinite: coefficient to 0
+ }
+ return decFloatFromBCD(df, exp, bcdar+1, sig);
+ } // decFloatFromPacked
+
+/* ------------------------------------------------------------------ */
+/* decFloatFromPackedChecked -- set from exponent and packed; checked */
+/* */
+/* df is the target decFloat */
+/* exp is the in-range unbiased exponent, q, or a special value in */
+/* the form returned by decFloatGetExponent */
+/* packed holds DECPMAX packed decimal digits plus a sign nibble */
+/* (all 6 codes are OK); the first (MSD) must be 0 if df is a NaN */
+/* and all digits must be 0 if df is infinite. For DOUBLE and */
+/* QUAD the first (pad) nibble must be 0. */
+/* All coefficient nibbles must be in 0-9 and sign in A-F. */
+/* returns df, which will be canonical or NULL if any of the */
+/* requirements are not met (if this case df is unchanged); that */
+/* is, the input data must be as returned by decFloatToPacked, */
+/* except that all six sign codes are acccepted. */
+/* */
+/* No status will be set. */
+/* ------------------------------------------------------------------ */
+decFloat * decFloatFromPackedChecked(decFloat *df, Int exp,
+ const uByte *packed) {
+ uByte bcdar[DECPMAX+2]; // work [+1 for pad, +1 for sign]
+ const uByte *ip; // ..
+ uByte *op; // ..
+ Int sig=0; // sign
+
+ // expand coefficient and sign to BCDAR
+ #if SINGLE
+ op=bcdar+1; // no pad digit
+ #else
+ op=bcdar; // first (pad) digit here
+ #endif
+ for (ip=packed; ip<packed+((DECPMAX+2)/2); ip++) {
+ *op=*ip>>4;
+ if (*op>9) return NULL;
+ op++;
+ *op=(uByte)(*ip&0x0f); // [final nibble is sign]
+ if (*op>9 && ip<packed+((DECPMAX+2)/2)-1) return NULL;
+ op++;
+ }
+ op--; // -> sign byte
+ if (*op<=9) return NULL; // bad sign
+ if (*op==DECPMINUS || *op==DECPMINUSALT) sig=DECFLOAT_Sign;
+
+ #if !SINGLE
+ if (bcdar[0]!=0) return NULL; // bad pad nibble
+ #endif
+
+ if (EXPISNAN(exp)) { // a NaN
+ if (bcdar[1]!=0) return NULL; // bad msd
+ } // NaN
+ else if (EXPISINF(exp)) { // is infinite
+ Int i;
+ for (i=0; i<DECPMAX; i++) {
+ if (bcdar[i+1]!=0) return NULL; // should be all zeros
+ }
+ } // infinity
+ else { // finite
+ // check the exponent is in range
+ if (exp>DECEMAX-DECPMAX+1) return NULL;
+ if (exp<DECEMIN-DECPMAX+1) return NULL;
+ }
+ return decFloatFromBCD(df, exp, bcdar+1, sig);
+ } // decFloatFromPacked
+
+/* ------------------------------------------------------------------ */
+/* decFloatFromString -- conversion from numeric string */
+/* */
+/* result is the decFloat format number which gets the result of */
+/* the conversion */
+/* *string is the character string which should contain a valid */
+/* number (which may be a special value), \0-terminated */
+/* If there are too many significant digits in the */
+/* coefficient it will be rounded. */
+/* set is the context */
+/* returns result */
+/* */
+/* The length of the coefficient and the size of the exponent are */
+/* checked by this routine, so the correct error (Underflow or */
+/* Overflow) can be reported or rounding applied, as necessary. */
+/* */
+/* There is no limit to the coefficient length for finite inputs; */
+/* NaN payloads must be integers with no more than DECPMAX-1 digits. */
+/* Exponents may have up to nine significant digits. */
+/* */
+/* If bad syntax is detected, the result will be a quiet NaN. */
+/* ------------------------------------------------------------------ */
+decFloat * decFloatFromString(decFloat *result, const char *string,
+ decContext *set) {
+ Int digits; // count of digits in coefficient
+ const char *dotchar=NULL; // where dot was found [NULL if none]
+ const char *cfirst=string; // -> first character of decimal part
+ const char *c; // work
+ uByte *ub; // ..
+ uInt uiwork; // for macros
+ bcdnum num; // collects data for finishing
+ uInt error=DEC_Conversion_syntax; // assume the worst
+ uByte buffer[ROUNDUP(DECSTRING+11, 8)]; // room for most coefficents,
+ // some common rounding, +3, & pad
+ #if DECTRACE
+ // printf("FromString %s ...\n", string);
+ #endif
+
+ for(;;) { // once-only 'loop'
+ num.sign=0; // assume non-negative
+ num.msd=buffer; // MSD is here always
+
+ // detect and validate the coefficient, including any leading,
+ // trailing, or embedded '.'
+ // [could test four-at-a-time here (saving 10% for decQuads),
+ // but that risks storage violation because the position of the
+ // terminator is unknown]
+ for (c=string;; c++) { // -> input character
+ if (((unsigned)(*c-'0'))<=9) continue; // '0' through '9' is good
+ if (*c=='\0') break; // most common non-digit
+ if (*c=='.') {
+ if (dotchar!=NULL) break; // not first '.'
+ dotchar=c; // record offset into decimal part
+ continue;}
+ if (c==string) { // first in string...
+ if (*c=='-') { // valid - sign
+ cfirst++;
+ num.sign=DECFLOAT_Sign;
+ continue;}
+ if (*c=='+') { // valid + sign
+ cfirst++;
+ continue;}
+ }
+ // *c is not a digit, terminator, or a valid +, -, or '.'
+ break;
+ } // c loop
+
+ digits=(uInt)(c-cfirst); // digits (+1 if a dot)
+
+ if (digits>0) { // had digits and/or dot
+ const char *clast=c-1; // note last coefficient char position
+ Int exp=0; // exponent accumulator
+ if (*c!='\0') { // something follows the coefficient
+ uInt edig; // unsigned work
+ // had some digits and more to come; expect E[+|-]nnn now
+ const char *firstexp; // exponent first non-zero
+ if (*c!='E' && *c!='e') break;
+ c++; // to (optional) sign
+ if (*c=='-' || *c=='+') c++; // step over sign (c=clast+2)
+ if (*c=='\0') break; // no digits! (e.g., '1.2E')
+ for (; *c=='0';) c++; // skip leading zeros [even last]
+ firstexp=c; // remember start [maybe '\0']
+ // gather exponent digits
+ edig=(uInt)*c-(uInt)'0';
+ if (edig<=9) { // [check not bad or terminator]
+ exp+=edig; // avoid initial X10
+ c++;
+ for (;; c++) {
+ edig=(uInt)*c-(uInt)'0';
+ if (edig>9) break;
+ exp=exp*10+edig;
+ }
+ }
+ // if not now on the '\0', *c must not be a digit
+ if (*c!='\0') break;
+
+ // (this next test must be after the syntax checks)
+ // if definitely more than the possible digits for format then
+ // the exponent may have wrapped, so simply set it to a certain
+ // over/underflow value
+ if (c>firstexp+DECEMAXD) exp=DECEMAX*2;
+ if (*(clast+2)=='-') exp=-exp; // was negative
+ } // exponent part
+
+ if (dotchar!=NULL) { // had a '.'
+ digits--; // remove from digits count
+ if (digits==0) break; // was dot alone: bad syntax
+ exp-=(Int)(clast-dotchar); // adjust exponent
+ // [the '.' can now be ignored]
+ }
+ num.exponent=exp; // exponent is good; store it
+
+ // Here when whole string has been inspected and syntax is good
+ // cfirst->first digit or dot, clast->last digit or dot
+ error=0; // no error possible now
+
+ // if the number of digits in the coefficient will fit in buffer
+ // then it can simply be converted to bcd8 and copied -- decFinalize
+ // will take care of leading zeros and rounding; the buffer is big
+ // enough for all canonical coefficients, including 0.00000nn...
+ ub=buffer;
+ if (digits<=(Int)(sizeof(buffer)-3)) { // [-3 allows by-4s copy]
+ c=cfirst;
+ if (dotchar!=NULL) { // a dot to worry about
+ if (*(c+1)=='.') { // common canonical case
+ *ub++=(uByte)(*c-'0'); // copy leading digit
+ c+=2; // prepare to handle rest
+ }
+ else for (; c<=clast;) { // '.' could be anywhere
+ // as usual, go by fours when safe; NB it has been asserted
+ // that a '.' does not have the same mask as a digit
+ if (c<=clast-3 // safe for four
+ && (UBTOUI(c)&0xf0f0f0f0)==CHARMASK) { // test four
+ UBFROMUI(ub, UBTOUI(c)&0x0f0f0f0f); // to BCD8
+ ub+=4;
+ c+=4;
+ continue;
+ }
+ if (*c=='.') { // found the dot
+ c++; // step over it ..
+ break; // .. and handle the rest
+ }
+ *ub++=(uByte)(*c++-'0');
+ }
+ } // had dot
+ // Now no dot; do this by fours (where safe)
+ for (; c<=clast-3; c+=4, ub+=4) UBFROMUI(ub, UBTOUI(c)&0x0f0f0f0f);
+ for (; c<=clast; c++, ub++) *ub=(uByte)(*c-'0');
+ num.lsd=buffer+digits-1; // record new LSD
+ } // fits
+
+ else { // too long for buffer
+ // [This is a rare and unusual case; arbitrary-length input]
+ // strip leading zeros [but leave final 0 if all 0's]
+ if (*cfirst=='.') cfirst++; // step past dot at start
+ if (*cfirst=='0') { // [cfirst always -> digit]
+ for (; cfirst<clast; cfirst++) {
+ if (*cfirst!='0') { // non-zero found
+ if (*cfirst=='.') continue; // [ignore]
+ break; // done
+ }
+ digits--; // 0 stripped
+ } // cfirst
+ } // at least one leading 0
+
+ // the coefficient is now as short as possible, but may still
+ // be too long; copy up to Pmax+1 digits to the buffer, then
+ // just record any non-zeros (set round-for-reround digit)
+ for (c=cfirst; c<=clast && ub<=buffer+DECPMAX; c++) {
+ // (see commentary just above)
+ if (c<=clast-3 // safe for four
+ && (UBTOUI(c)&0xf0f0f0f0)==CHARMASK) { // four digits
+ UBFROMUI(ub, UBTOUI(c)&0x0f0f0f0f); // to BCD8
+ ub+=4;
+ c+=3; // [will become 4]
+ continue;
+ }
+ if (*c=='.') continue; // [ignore]
+ *ub++=(uByte)(*c-'0');
+ }
+ ub--; // -> LSD
+ for (; c<=clast; c++) { // inspect remaining chars
+ if (*c!='0') { // sticky bit needed
+ if (*c=='.') continue; // [ignore]
+ *ub=DECSTICKYTAB[*ub]; // update round-for-reround
+ break; // no need to look at more
+ }
+ }
+ num.lsd=ub; // record LSD
+ // adjust exponent for dropped digits
+ num.exponent+=digits-(Int)(ub-buffer+1);
+ } // too long for buffer
+ } // digits and/or dot
+
+ else { // no digits or dot were found
+ // only Infinities and NaNs are allowed, here
+ if (*c=='\0') break; // nothing there is bad
+ buffer[0]=0; // default a coefficient of 0
+ num.lsd=buffer; // ..
+ if (decBiStr(c, "infinity", "INFINITY")
+ || decBiStr(c, "inf", "INF")) num.exponent=DECFLOAT_Inf;
+ else { // should be a NaN
+ num.exponent=DECFLOAT_qNaN; // assume quiet NaN
+ if (*c=='s' || *c=='S') { // probably an sNaN
+ num.exponent=DECFLOAT_sNaN; // effect the 's'
+ c++; // and step over it
+ }
+ if (*c!='N' && *c!='n') break; // check caseless "NaN"
+ c++;
+ if (*c!='a' && *c!='A') break; // ..
+ c++;
+ if (*c!='N' && *c!='n') break; // ..
+ c++;
+ // now either nothing, or nnnn payload (no dots), expected
+ // -> start of integer, and skip leading 0s [including plain 0]
+ for (cfirst=c; *cfirst=='0';) cfirst++;
+ if (*cfirst!='\0') { // not empty or all-0, payload
+ // payload found; check all valid digits and copy to buffer as bcd8
+ ub=buffer;
+ for (c=cfirst;; c++, ub++) {
+ if ((unsigned)(*c-'0')>9) break; // quit if not 0-9
+ if (c-cfirst==DECPMAX-1) break; // too many digits
+ *ub=(uByte)(*c-'0'); // good bcd8
+ }
+ if (*c!='\0') break; // not all digits, or too many
+ num.lsd=ub-1; // record new LSD
+ }
+ } // NaN or sNaN
+ error=0; // syntax is OK
+ } // digits=0 (special expected)
+ break; // drop out
+ } // [for(;;) once-loop]
+
+ // decShowNum(&num, "fromStr");
+
+ if (error!=0) {
+ set->status|=error;
+ num.exponent=DECFLOAT_qNaN; // set up quiet NaN
+ num.sign=0; // .. with 0 sign
+ buffer[0]=0; // .. and coefficient
+ num.lsd=buffer; // ..
+ // decShowNum(&num, "oops");
+ }
+
+ // decShowNum(&num, "dffs");
+ decFinalize(result, &num, set); // round, check, and lay out
+ // decFloatShow(result, "fromString");
+ return result;
+ } // decFloatFromString
+
+/* ------------------------------------------------------------------ */
+/* decFloatFromWider -- conversion from next-wider format */
+/* */
+/* result is the decFloat format number which gets the result of */
+/* the conversion */
+/* wider is the decFloatWider format number which will be narrowed */
+/* set is the context */
+/* returns result */
+/* */
+/* Narrowing can cause rounding, overflow, etc., but not Invalid */
+/* operation (sNaNs are copied and do not signal). */
+/* ------------------------------------------------------------------ */
+// narrow-to is not possible for decQuad format numbers; simply omit
+#if !QUAD
+decFloat * decFloatFromWider(decFloat *result, const decFloatWider *wider,
+ decContext *set) {
+ bcdnum num; // collects data for finishing
+ uByte bcdar[DECWPMAX]; // room for wider coefficient
+ uInt widerhi=DFWWORD(wider, 0); // top word
+ Int exp;
+
+ GETWCOEFF(wider, bcdar);
+
+ num.msd=bcdar; // MSD is here always
+ num.lsd=bcdar+DECWPMAX-1; // LSD is here always
+ num.sign=widerhi&0x80000000; // extract sign [DECFLOAT_Sign=Neg]
+
+ // decode the wider combination field to exponent
+ exp=DECCOMBWEXP[widerhi>>26]; // decode from wider combination field
+ // if it is a special there's nothing to do unless sNaN; if it's
+ // finite then add the (wider) exponent continuation and unbias
+ if (EXPISSPECIAL(exp)) exp=widerhi&0x7e000000; // include sNaN selector
+ else exp+=GETWECON(wider)-DECWBIAS;
+ num.exponent=exp;
+
+ // decShowNum(&num, "dffw");
+ return decFinalize(result, &num, set);// round, check, and lay out
+ } // decFloatFromWider
+#endif
+
+/* ------------------------------------------------------------------ */
+/* decFloatGetCoefficient -- get coefficient as BCD8 */
+/* */
+/* df is the decFloat from which to extract the coefficient */
+/* bcdar is where DECPMAX bytes will be written, one BCD digit in */
+/* each byte (BCD8 encoding); if df is a NaN the first byte will */
+/* be zero, and if it is infinite they will all be zero */
+/* returns the sign of the coefficient (DECFLOAT_Sign if negative, */
+/* 0 otherwise) */
+/* */
+/* No error is possible, and no status will be set. If df is a */
+/* special value the array is set to zeros (for Infinity) or to the */
+/* payload of a qNaN or sNaN. */
+/* ------------------------------------------------------------------ */
+Int decFloatGetCoefficient(const decFloat *df, uByte *bcdar) {
+ if (DFISINF(df)) memset(bcdar, 0, DECPMAX);
+ else {
+ GETCOEFF(df, bcdar); // use macro
+ if (DFISNAN(df)) bcdar[0]=0; // MSD needs correcting
+ }
+ return GETSIGN(df);
+ } // decFloatGetCoefficient
+
+/* ------------------------------------------------------------------ */
+/* decFloatGetExponent -- get unbiased exponent */
+/* */
+/* df is the decFloat from which to extract the exponent */
+/* returns the exponent, q. */
+/* */
+/* No error is possible, and no status will be set. If df is a */
+/* special value the first seven bits of the decFloat are returned, */
+/* left adjusted and with the first (sign) bit set to 0 (followed by */
+/* 25 0 bits). e.g., -sNaN would return 0x7e000000 (DECFLOAT_sNaN). */
+/* ------------------------------------------------------------------ */
+Int decFloatGetExponent(const decFloat *df) {
+ if (DFISSPECIAL(df)) return DFWORD(df, 0)&0x7e000000;
+ return GETEXPUN(df);
+ } // decFloatGetExponent
+
+/* ------------------------------------------------------------------ */
+/* decFloatSetCoefficient -- set coefficient from BCD8 */
+/* */
+/* df is the target decFloat (and source of exponent/special value) */
+/* bcdar holds DECPMAX digits to set the coefficient from, one */
+/* digit in each byte (BCD8 encoding); the first (MSD) is ignored */
+/* if df is a NaN; all are ignored if df is infinite. */
+/* sig is DECFLOAT_Sign to set the sign bit, 0 otherwise */
+/* returns df, which will be canonical */
+/* */
+/* No error is possible, and no status will be set. */
+/* ------------------------------------------------------------------ */
+decFloat * decFloatSetCoefficient(decFloat *df, const uByte *bcdar,
+ Int sig) {
+ uInt exp; // for exponent
+ uByte bcdzero[DECPMAX]; // for infinities
+
+ // Exponent/special code is extracted from df
+ if (DFISSPECIAL(df)) {
+ exp=DFWORD(df, 0)&0x7e000000;
+ if (DFISINF(df)) {
+ memset(bcdzero, 0, DECPMAX);
+ return decFloatFromBCD(df, exp, bcdzero, sig);
+ }
+ }
+ else exp=GETEXPUN(df);
+ return decFloatFromBCD(df, exp, bcdar, sig);
+ } // decFloatSetCoefficient
+
+/* ------------------------------------------------------------------ */
+/* decFloatSetExponent -- set exponent or special value */
+/* */
+/* df is the target decFloat (and source of coefficient/payload) */
+/* set is the context for reporting status */
+/* exp is the unbiased exponent, q, or a special value in the form */
+/* returned by decFloatGetExponent */
+/* returns df, which will be canonical */
+/* */
+/* No error is possible, but Overflow or Underflow might occur. */
+/* ------------------------------------------------------------------ */
+decFloat * decFloatSetExponent(decFloat *df, decContext *set, Int exp) {
+ uByte bcdcopy[DECPMAX]; // for coefficient
+ bcdnum num; // work
+ num.exponent=exp;
+ num.sign=decFloatGetCoefficient(df, bcdcopy); // extract coefficient
+ if (DFISSPECIAL(df)) { // MSD or more needs correcting
+ if (DFISINF(df)) memset(bcdcopy, 0, DECPMAX);
+ bcdcopy[0]=0;
+ }
+ num.msd=bcdcopy;
+ num.lsd=bcdcopy+DECPMAX-1;
+ return decFinalize(df, &num, set);
+ } // decFloatSetExponent
+
+/* ------------------------------------------------------------------ */
+/* decFloatRadix -- returns the base (10) */
+/* */
+/* df is any decFloat of this format */
+/* ------------------------------------------------------------------ */
+uInt decFloatRadix(const decFloat *df) {
+ if (df) return 10; // to placate compiler
+ return 10;
+ } // decFloatRadix
+
+/* The following function is not available if DECPRINT=0 */
+#if DECPRINT
+/* ------------------------------------------------------------------ */
+/* decFloatShow -- printf a decFloat in hexadecimal and decimal */
+/* df is the decFloat to show */
+/* tag is a tag string displayed with the number */
+/* */
+/* This is a debug aid; the precise format of the string may change. */
+/* ------------------------------------------------------------------ */
+void decFloatShow(const decFloat *df, const char *tag) {
+ char hexbuf[DECBYTES*2+DECBYTES/4+1]; // NB blank after every fourth
+ char buff[DECSTRING]; // for value in decimal
+ Int i, j=0;
+
+ for (i=0; i<DECBYTES; i++) {
+ #if DECLITEND
+ sprintf(&hexbuf[j], "%02x", df->bytes[DECBYTES-1-i]);
+ #else
+ sprintf(&hexbuf[j], "%02x", df->bytes[i]);
+ #endif
+ j+=2;
+ // the next line adds blank (and terminator) after final pair, too
+ if ((i+1)%4==0) {strcpy(&hexbuf[j], " "); j++;}
+ }
+ decFloatToString(df, buff);
+ printf(">%s> %s [big-endian] %s\n", tag, hexbuf, buff);
+ return;
+ } // decFloatShow
+#endif
+
+/* ------------------------------------------------------------------ */
+/* decFloatToBCD -- get sign, exponent, and BCD8 from a decFloat */
+/* */
+/* df is the source decFloat */
+/* exp will be set to the unbiased exponent, q, or to a special */
+/* value in the form returned by decFloatGetExponent */
+/* bcdar is where DECPMAX bytes will be written, one BCD digit in */
+/* each byte (BCD8 encoding); if df is a NaN the first byte will */
+/* be zero, and if it is infinite they will all be zero */
+/* returns the sign of the coefficient (DECFLOAT_Sign if negative, */
+/* 0 otherwise) */
+/* */
+/* No error is possible, and no status will be set. */
+/* ------------------------------------------------------------------ */
+Int decFloatToBCD(const decFloat *df, Int *exp, uByte *bcdar) {
+ if (DFISINF(df)) {
+ memset(bcdar, 0, DECPMAX);
+ *exp=DFWORD(df, 0)&0x7e000000;
+ }
+ else {
+ GETCOEFF(df, bcdar); // use macro
+ if (DFISNAN(df)) {
+ bcdar[0]=0; // MSD needs correcting
+ *exp=DFWORD(df, 0)&0x7e000000;
+ }
+ else { // finite
+ *exp=GETEXPUN(df);
+ }
+ }
+ return GETSIGN(df);
+ } // decFloatToBCD
+
+/* ------------------------------------------------------------------ */
+/* decFloatToEngString -- conversion to numeric string, engineering */
+/* */
+/* df is the decFloat format number to convert */
+/* string is the string where the result will be laid out */
+/* */
+/* string must be at least DECPMAX+9 characters (the worst case is */
+/* "-0.00000nnn...nnn\0", which is as long as the exponent form when */
+/* DECEMAXD<=4); this condition is asserted above */
+/* */
+/* No error is possible, and no status will be set */
+/* ------------------------------------------------------------------ */
+char * decFloatToEngString(const decFloat *df, char *string){
+ uInt msd; // coefficient MSD
+ Int exp; // exponent top two bits or full
+ uInt comb; // combination field
+ char *cstart; // coefficient start
+ char *c; // output pointer in string
+ char *s, *t; // .. (source, target)
+ Int pre, e; // work
+ const uByte *u; // ..
+ uInt uiwork; // for macros [one compiler needs
+ // volatile here to avoid bug, but
+ // that doubles execution time]
+
+ // Source words; macro handles endianness
+ uInt sourhi=DFWORD(df, 0); // word with sign
+ #if DECPMAX==16
+ uInt sourlo=DFWORD(df, 1);
+ #elif DECPMAX==34
+ uInt sourmh=DFWORD(df, 1);
+ uInt sourml=DFWORD(df, 2);
+ uInt sourlo=DFWORD(df, 3);
+ #endif
+
+ c=string; // where result will go
+ if (((Int)sourhi)<0) *c++='-'; // handle sign
+ comb=sourhi>>26; // sign+combination field
+ msd=DECCOMBMSD[comb]; // decode the combination field
+ exp=DECCOMBEXP[comb]; // ..
+
+ if (EXPISSPECIAL(exp)) { // special
+ if (exp==DECFLOAT_Inf) { // infinity
+ strcpy(c, "Inf");
+ strcpy(c+3, "inity");
+ return string; // easy
+ }
+ if (sourhi&0x02000000) *c++='s'; // sNaN
+ strcpy(c, "NaN"); // complete word
+ c+=3; // step past
+ // quick exit if the payload is zero
+ #if DECPMAX==7
+ if ((sourhi&0x000fffff)==0) return string;
+ #elif DECPMAX==16
+ if (sourlo==0 && (sourhi&0x0003ffff)==0) return string;
+ #elif DECPMAX==34
+ if (sourlo==0 && sourml==0 && sourmh==0
+ && (sourhi&0x00003fff)==0) return string;
+ #endif
+ // otherwise drop through to add integer; set correct exp etc.
+ exp=0; msd=0; // setup for following code
+ }
+ else { // complete exponent; top two bits are in place
+ exp+=GETECON(df)-DECBIAS; // .. + continuation and unbias
+ }
+
+ /* convert the digits of the significand to characters */
+ cstart=c; // save start of coefficient
+ if (msd) *c++=(char)('0'+(char)msd); // non-zero most significant digit
+
+ // Decode the declets. After extracting each declet, it is
+ // decoded to a 4-uByte sequence by table lookup; the four uBytes
+ // are the three encoded BCD8 digits followed by a 1-byte length
+ // (significant digits, except that 000 has length 0). This allows
+ // us to left-align the first declet with non-zero content, then
+ // the remaining ones are full 3-char length. Fixed-length copies
+ // are used because variable-length memcpy causes a subroutine call
+ // in at least two compilers. (The copies are length 4 for speed
+ // and are safe because the last item in the array is of length
+ // three and has the length byte following.)
+ #define dpd2char(dpdin) u=&DPD2BCD8[((dpdin)&0x3ff)*4]; \
+ if (c!=cstart) {UBFROMUI(c, UBTOUI(u)|CHARMASK); c+=3;} \
+ else if (*(u+3)) { \
+ UBFROMUI(c, UBTOUI(u+3-*(u+3))|CHARMASK); c+=*(u+3);}
+
+ #if DECPMAX==7
+ dpd2char(sourhi>>10); // declet 1
+ dpd2char(sourhi); // declet 2
+
+ #elif DECPMAX==16
+ dpd2char(sourhi>>8); // declet 1
+ dpd2char((sourhi<<2) | (sourlo>>30)); // declet 2
+ dpd2char(sourlo>>20); // declet 3
+ dpd2char(sourlo>>10); // declet 4
+ dpd2char(sourlo); // declet 5
+
+ #elif DECPMAX==34
+ dpd2char(sourhi>>4); // declet 1
+ dpd2char((sourhi<<6) | (sourmh>>26)); // declet 2
+ dpd2char(sourmh>>16); // declet 3
+ dpd2char(sourmh>>6); // declet 4
+ dpd2char((sourmh<<4) | (sourml>>28)); // declet 5
+ dpd2char(sourml>>18); // declet 6
+ dpd2char(sourml>>8); // declet 7
+ dpd2char((sourml<<2) | (sourlo>>30)); // declet 8
+ dpd2char(sourlo>>20); // declet 9
+ dpd2char(sourlo>>10); // declet 10
+ dpd2char(sourlo); // declet 11
+ #endif
+
+ if (c==cstart) *c++='0'; // all zeros, empty -- make "0"
+
+ if (exp==0) { // integer or NaN case -- easy
+ *c='\0'; // terminate
+ return string;
+ }
+ /* non-0 exponent */
+
+ e=0; // assume no E
+ pre=(Int)(c-cstart)+exp; // length+exp [c->LSD+1]
+ // [here, pre-exp is the digits count (==1 for zero)]
+
+ if (exp>0 || pre<-5) { // need exponential form
+ e=pre-1; // calculate E value
+ pre=1; // assume one digit before '.'
+ if (e!=0) { // engineering: may need to adjust
+ Int adj; // adjustment
+ // The C remainder operator is undefined for negative numbers, so
+ // a positive remainder calculation must be used here
+ if (e<0) {
+ adj=(-e)%3;
+ if (adj!=0) adj=3-adj;
+ }
+ else { // e>0
+ adj=e%3;
+ }
+ e=e-adj;
+ // if dealing with zero still produce an exponent which is a
+ // multiple of three, as expected, but there will only be the
+ // one zero before the E, still. Otherwise note the padding.
+ if (!DFISZERO(df)) pre+=adj;
+ else { // is zero
+ if (adj!=0) { // 0.00Esnn needed
+ e=e+3;
+ pre=-(2-adj);
+ }
+ } // zero
+ } // engineering adjustment
+ } // exponential form
+ // printf("e=%ld pre=%ld exp=%ld\n", (LI)e, (LI)pre, (LI)exp);
+
+ /* modify the coefficient, adding 0s, '.', and E+nn as needed */
+ if (pre>0) { // ddd.ddd (plain), perhaps with E
+ // or dd00 padding for engineering
+ char *dotat=cstart+pre;
+ if (dotat<c) { // if embedded dot needed...
+ // move by fours; there must be space for junk at the end
+ // because there is still space for exponent
+ s=dotat+ROUNDDOWN4(c-dotat); // source
+ t=s+1; // target
+ // open the gap [cannot use memcpy]
+ for (; s>=dotat; s-=4, t-=4) UBFROMUI(t, UBTOUI(s));
+ *dotat='.';
+ c++; // length increased by one
+ } // need dot?
+ else for (; c<dotat; c++) *c='0'; // pad for engineering
+ } // pre>0
+ else {
+ /* -5<=pre<=0: here for plain 0.ddd or 0.000ddd forms (may have
+ E, but only for 0.00E+3 kind of case -- with plenty of spare
+ space in this case */
+ pre=-pre+2; // gap width, including "0."
+ t=cstart+ROUNDDOWN4(c-cstart)+pre; // preferred first target point
+ // backoff if too far to the right
+ if (t>string+DECSTRING-5) t=string+DECSTRING-5; // adjust to fit
+ // now shift the entire coefficient to the right, being careful not
+ // to access to the left of string [cannot use memcpy]
+ for (s=t-pre; s>=string; s-=4, t-=4) UBFROMUI(t, UBTOUI(s));
+ // for Quads and Singles there may be a character or two left...
+ s+=3; // where next would come from
+ for(; s>=cstart; s--, t--) *(t+3)=*(s);
+ // now have fill 0. through 0.00000; use overlaps to avoid tests
+ if (pre>=4) {
+ memcpy(cstart+pre-4, "0000", 4);
+ memcpy(cstart, "0.00", 4);
+ }
+ else { // 2 or 3
+ *(cstart+pre-1)='0';
+ memcpy(cstart, "0.", 2);
+ }
+ c+=pre; // to end
+ }
+
+ // finally add the E-part, if needed; it will never be 0, and has
+ // a maximum length of 3 or 4 digits (asserted above)
+ if (e!=0) {
+ memcpy(c, "E+", 2); // starts with E, assume +
+ c++;
+ if (e<0) {
+ *c='-'; // oops, need '-'
+ e=-e; // uInt, please
+ }
+ c++;
+ // Three-character exponents are easy; 4-character a little trickier
+ #if DECEMAXD<=3
+ u=&BIN2BCD8[e*4]; // -> 3 digits + length byte
+ // copy fixed 4 characters [is safe], starting at non-zero
+ // and with character mask to convert BCD to char
+ UBFROMUI(c, UBTOUI(u+3-*(u+3))|CHARMASK);
+ c+=*(u+3); // bump pointer appropriately
+ #elif DECEMAXD==4
+ if (e<1000) { // 3 (or fewer) digits case
+ u=&BIN2BCD8[e*4]; // -> 3 digits + length byte
+ UBFROMUI(c, UBTOUI(u+3-*(u+3))|CHARMASK); // [as above]
+ c+=*(u+3); // bump pointer appropriately
+ }
+ else { // 4-digits
+ Int thou=((e>>3)*1049)>>17; // e/1000
+ Int rem=e-(1000*thou); // e%1000
+ *c++=(char)('0'+(char)thou); // the thousands digit
+ u=&BIN2BCD8[rem*4]; // -> 3 digits + length byte
+ UBFROMUI(c, UBTOUI(u)|CHARMASK);// copy fixed 3+1 characters [is safe]
+ c+=3; // bump pointer, always 3 digits
+ }
+ #endif
+ }
+ *c='\0'; // terminate
+ //printf("res %s\n", string);
+ return string;
+ } // decFloatToEngString
+
+/* ------------------------------------------------------------------ */
+/* decFloatToPacked -- convert decFloat to Packed decimal + exponent */
+/* */
+/* df is the source decFloat */
+/* exp will be set to the unbiased exponent, q, or to a special */
+/* value in the form returned by decFloatGetExponent */
+/* packed is where DECPMAX nibbles will be written with the sign as */
+/* final nibble (0x0c for +, 0x0d for -); a NaN has a first nibble */
+/* of zero, and an infinity is all zeros. decDouble and decQuad */
+/* have a additional leading zero nibble, leading to result */
+/* lengths of 4, 9, and 18 bytes. */
+/* returns the sign of the coefficient (DECFLOAT_Sign if negative, */
+/* 0 otherwise) */
+/* */
+/* No error is possible, and no status will be set. */
+/* ------------------------------------------------------------------ */
+Int decFloatToPacked(const decFloat *df, Int *exp, uByte *packed) {
+ uByte bcdar[DECPMAX+2]; // work buffer
+ uByte *ip=bcdar, *op=packed; // work pointers
+ if (DFISINF(df)) {
+ memset(bcdar, 0, DECPMAX+2);
+ *exp=DECFLOAT_Inf;
+ }
+ else {
+ GETCOEFF(df, bcdar+1); // use macro
+ if (DFISNAN(df)) {
+ bcdar[1]=0; // MSD needs clearing
+ *exp=DFWORD(df, 0)&0x7e000000;
+ }
+ else { // finite
+ *exp=GETEXPUN(df);
+ }
+ }
+ // now pack; coefficient currently at bcdar+1
+ #if SINGLE
+ ip++; // ignore first byte
+ #else
+ *ip=0; // need leading zero
+ #endif
+ // set final byte to Packed BCD sign value
+ bcdar[DECPMAX+1]=(DFISSIGNED(df) ? DECPMINUS : DECPPLUS);
+ // pack an even number of bytes...
+ for (; op<packed+((DECPMAX+2)/2); op++, ip+=2) {
+ *op=(uByte)((*ip<<4)+*(ip+1));
+ }
+ return (bcdar[DECPMAX+1]==DECPMINUS ? DECFLOAT_Sign : 0);
+ } // decFloatToPacked
+
+/* ------------------------------------------------------------------ */
+/* decFloatToString -- conversion to numeric string */
+/* */
+/* df is the decFloat format number to convert */
+/* string is the string where the result will be laid out */
+/* */
+/* string must be at least DECPMAX+9 characters (the worst case is */
+/* "-0.00000nnn...nnn\0", which is as long as the exponent form when */
+/* DECEMAXD<=4); this condition is asserted above */
+/* */
+/* No error is possible, and no status will be set */
+/* ------------------------------------------------------------------ */
+char * decFloatToString(const decFloat *df, char *string){
+ uInt msd; // coefficient MSD
+ Int exp; // exponent top two bits or full
+ uInt comb; // combination field
+ char *cstart; // coefficient start
+ char *c; // output pointer in string
+ char *s, *t; // .. (source, target)
+ Int pre, e; // work
+ const uByte *u; // ..
+ uInt uiwork; // for macros [one compiler needs
+ // volatile here to avoid bug, but
+ // that doubles execution time]
+
+ // Source words; macro handles endianness
+ uInt sourhi=DFWORD(df, 0); // word with sign
+ #if DECPMAX==16
+ uInt sourlo=DFWORD(df, 1);
+ #elif DECPMAX==34
+ uInt sourmh=DFWORD(df, 1);
+ uInt sourml=DFWORD(df, 2);
+ uInt sourlo=DFWORD(df, 3);
+ #endif
+
+ c=string; // where result will go
+ if (((Int)sourhi)<0) *c++='-'; // handle sign
+ comb=sourhi>>26; // sign+combination field
+ msd=DECCOMBMSD[comb]; // decode the combination field
+ exp=DECCOMBEXP[comb]; // ..
+
+ if (!EXPISSPECIAL(exp)) { // finite
+ // complete exponent; top two bits are in place
+ exp+=GETECON(df)-DECBIAS; // .. + continuation and unbias
+ }
+ else { // IS special
+ if (exp==DECFLOAT_Inf) { // infinity
+ strcpy(c, "Infinity");
+ return string; // easy
+ }
+ if (sourhi&0x02000000) *c++='s'; // sNaN
+ strcpy(c, "NaN"); // complete word
+ c+=3; // step past
+ // quick exit if the payload is zero
+ #if DECPMAX==7
+ if ((sourhi&0x000fffff)==0) return string;
+ #elif DECPMAX==16
+ if (sourlo==0 && (sourhi&0x0003ffff)==0) return string;
+ #elif DECPMAX==34
+ if (sourlo==0 && sourml==0 && sourmh==0
+ && (sourhi&0x00003fff)==0) return string;
+ #endif
+ // otherwise drop through to add integer; set correct exp etc.
+ exp=0; msd=0; // setup for following code
+ }
+
+ /* convert the digits of the significand to characters */
+ cstart=c; // save start of coefficient
+ if (msd) *c++=(char)('0'+(char)msd); // non-zero most significant digit
+
+ // Decode the declets. After extracting each declet, it is
+ // decoded to a 4-uByte sequence by table lookup; the four uBytes
+ // are the three encoded BCD8 digits followed by a 1-byte length
+ // (significant digits, except that 000 has length 0). This allows
+ // us to left-align the first declet with non-zero content, then
+ // the remaining ones are full 3-char length. Fixed-length copies
+ // are used because variable-length memcpy causes a subroutine call
+ // in at least two compilers. (The copies are length 4 for speed
+ // and are safe because the last item in the array is of length
+ // three and has the length byte following.)
+ #define dpd2char(dpdin) u=&DPD2BCD8[((dpdin)&0x3ff)*4]; \
+ if (c!=cstart) {UBFROMUI(c, UBTOUI(u)|CHARMASK); c+=3;} \
+ else if (*(u+3)) { \
+ UBFROMUI(c, UBTOUI(u+3-*(u+3))|CHARMASK); c+=*(u+3);}
+
+ #if DECPMAX==7
+ dpd2char(sourhi>>10); // declet 1
+ dpd2char(sourhi); // declet 2
+
+ #elif DECPMAX==16
+ dpd2char(sourhi>>8); // declet 1
+ dpd2char((sourhi<<2) | (sourlo>>30)); // declet 2
+ dpd2char(sourlo>>20); // declet 3
+ dpd2char(sourlo>>10); // declet 4
+ dpd2char(sourlo); // declet 5
+
+ #elif DECPMAX==34
+ dpd2char(sourhi>>4); // declet 1
+ dpd2char((sourhi<<6) | (sourmh>>26)); // declet 2
+ dpd2char(sourmh>>16); // declet 3
+ dpd2char(sourmh>>6); // declet 4
+ dpd2char((sourmh<<4) | (sourml>>28)); // declet 5
+ dpd2char(sourml>>18); // declet 6
+ dpd2char(sourml>>8); // declet 7
+ dpd2char((sourml<<2) | (sourlo>>30)); // declet 8
+ dpd2char(sourlo>>20); // declet 9
+ dpd2char(sourlo>>10); // declet 10
+ dpd2char(sourlo); // declet 11
+ #endif
+
+ if (c==cstart) *c++='0'; // all zeros, empty -- make "0"
+
+ //[This fast path is valid but adds 3-5 cycles to worst case length]
+ //if (exp==0) { // integer or NaN case -- easy
+ // *c='\0'; // terminate
+ // return string;
+ // }
+
+ e=0; // assume no E
+ pre=(Int)(c-cstart)+exp; // length+exp [c->LSD+1]
+ // [here, pre-exp is the digits count (==1 for zero)]
+
+ if (exp>0 || pre<-5) { // need exponential form
+ e=pre-1; // calculate E value
+ pre=1; // assume one digit before '.'
+ } // exponential form
+
+ /* modify the coefficient, adding 0s, '.', and E+nn as needed */
+ if (pre>0) { // ddd.ddd (plain), perhaps with E
+ char *dotat=cstart+pre;
+ if (dotat<c) { // if embedded dot needed...
+ // [memmove is a disaster, here]
+ // move by fours; there must be space for junk at the end
+ // because exponent is still possible
+ s=dotat+ROUNDDOWN4(c-dotat); // source
+ t=s+1; // target
+ // open the gap [cannot use memcpy]
+ for (; s>=dotat; s-=4, t-=4) UBFROMUI(t, UBTOUI(s));
+ *dotat='.';
+ c++; // length increased by one
+ } // need dot?
+
+ // finally add the E-part, if needed; it will never be 0, and has
+ // a maximum length of 3 or 4 digits (asserted above)
+ if (e!=0) {
+ memcpy(c, "E+", 2); // starts with E, assume +
+ c++;
+ if (e<0) {
+ *c='-'; // oops, need '-'
+ e=-e; // uInt, please
+ }
+ c++;
+ // Three-character exponents are easy; 4-character a little trickier
+ #if DECEMAXD<=3
+ u=&BIN2BCD8[e*4]; // -> 3 digits + length byte
+ // copy fixed 4 characters [is safe], starting at non-zero
+ // and with character mask to convert BCD to char
+ UBFROMUI(c, UBTOUI(u+3-*(u+3))|CHARMASK);
+ c+=*(u+3); // bump pointer appropriately
+ #elif DECEMAXD==4
+ if (e<1000) { // 3 (or fewer) digits case
+ u=&BIN2BCD8[e*4]; // -> 3 digits + length byte
+ UBFROMUI(c, UBTOUI(u+3-*(u+3))|CHARMASK); // [as above]
+ c+=*(u+3); // bump pointer appropriately
+ }
+ else { // 4-digits
+ Int thou=((e>>3)*1049)>>17; // e/1000
+ Int rem=e-(1000*thou); // e%1000
+ *c++=(char)('0'+(char)thou); // the thousands digit
+ u=&BIN2BCD8[rem*4]; // -> 3 digits + length byte
+ UBFROMUI(c, UBTOUI(u)|CHARMASK); // copy fixed 3+1 characters [is safe]
+ c+=3; // bump pointer, always 3 digits
+ }
+ #endif
+ }
+ *c='\0'; // add terminator
+ //printf("res %s\n", string);
+ return string;
+ } // pre>0
+
+ /* -5<=pre<=0: here for plain 0.ddd or 0.000ddd forms (can never have E) */
+ // Surprisingly, this is close to being the worst-case path, so the
+ // shift is done by fours; this is a little tricky because the
+ // rightmost character to be written must not be beyond where the
+ // rightmost terminator could be -- so backoff to not touch
+ // terminator position if need be (this can make exact alignments
+ // for full Doubles, but in some cases needs care not to access too
+ // far to the left)
+
+ pre=-pre+2; // gap width, including "0."
+ t=cstart+ROUNDDOWN4(c-cstart)+pre; // preferred first target point
+ // backoff if too far to the right
+ if (t>string+DECSTRING-5) t=string+DECSTRING-5; // adjust to fit
+ // now shift the entire coefficient to the right, being careful not
+ // to access to the left of string [cannot use memcpy]
+ for (s=t-pre; s>=string; s-=4, t-=4) UBFROMUI(t, UBTOUI(s));
+ // for Quads and Singles there may be a character or two left...
+ s+=3; // where next would come from
+ for(; s>=cstart; s--, t--) *(t+3)=*(s);
+ // now have fill 0. through 0.00000; use overlaps to avoid tests
+ if (pre>=4) {
+ memcpy(cstart+pre-4, "0000", 4);
+ memcpy(cstart, "0.00", 4);
+ }
+ else { // 2 or 3
+ *(cstart+pre-1)='0';
+ memcpy(cstart, "0.", 2);
+ }
+ *(c+pre)='\0'; // terminate
+ return string;
+ } // decFloatToString
+
+/* ------------------------------------------------------------------ */
+/* decFloatToWider -- conversion to next-wider format */
+/* */
+/* source is the decFloat format number which gets the result of */
+/* the conversion */
+/* wider is the decFloatWider format number which will be narrowed */
+/* returns wider */
+/* */
+/* Widening is always exact; no status is set (sNaNs are copied and */
+/* do not signal). The result will be canonical if the source is, */
+/* and may or may not be if the source is not. */
+/* ------------------------------------------------------------------ */
+// widening is not possible for decQuad format numbers; simply omit
+#if !QUAD
+decFloatWider * decFloatToWider(const decFloat *source, decFloatWider *wider) {
+ uInt msd;
+
+ /* Construct and copy the sign word */
+ if (DFISSPECIAL(source)) {
+ // copy sign, combination, and first bit of exponent (sNaN selector)
+ DFWWORD(wider, 0)=DFWORD(source, 0)&0xfe000000;
+ msd=0;
+ }
+ else { // is finite number
+ uInt exp=GETEXPUN(source)+DECWBIAS; // get unbiased exponent and rebias
+ uInt code=(exp>>DECWECONL)<<29; // set two bits of exp [msd=0]
+ code|=(exp<<(32-6-DECWECONL)) & 0x03ffffff; // add exponent continuation
+ code|=DFWORD(source, 0)&0x80000000; // add sign
+ DFWWORD(wider, 0)=code; // .. and place top word in wider
+ msd=GETMSD(source); // get source coefficient MSD [0-9]
+ }
+ /* Copy the coefficient and clear any 'unused' words to left */
+ #if SINGLE
+ DFWWORD(wider, 1)=(DFWORD(source, 0)&0x000fffff)|(msd<<20);
+ #elif DOUBLE
+ DFWWORD(wider, 2)=(DFWORD(source, 0)&0x0003ffff)|(msd<<18);