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sim_tape.c
5170 lines (4522 loc) · 207 KB
/
sim_tape.c
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/* sim_tape.c: simulator tape support library
Copyright (c) 1993-2008, Robert M Supnik
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, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
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. IN NO EVENT SHALL
ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of Robert M Supnik shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
Ultimately, this will be a place to hide processing of various tape formats,
as well as OS-specific direct hardware access.
23-Jan-12 MP Added support for Logical EOT detection while positioning
05-Feb-11 MP Refactored to prepare for SIM_ASYNC_IO support
Added higher level routines:
sim_tape_wreomrw - erase remainder of tape & rewind
sim_tape_sprecsf - skip records
sim_tape_spfilef - skip files
sim_tape_sprecsr - skip records rev
sim_tape_spfiler - skip files rev
sim_tape_position - general purpose position
These routines correspond to natural tape operations
and will align better when physical tape support is
included here.
08-Jun-08 JDB Fixed signed/unsigned warning in sim_tape_set_fmt
23-Jan-07 JDB Fixed backspace over gap at BOT
22-Jan-07 RMS Fixed bug in P7B format read reclnt rev (found by Rich Cornwell)
15-Dec-06 RMS Added support for small capacity tapes
30-Aug-06 JDB Added erase gap support
14-Feb-06 RMS Added variable tape capacity
23-Jan-06 JDB Fixed odd-byte-write problem in sim_tape_wrrecf
17-Dec-05 RMS Added write support for Paul Pierce 7b format
16-Aug-05 RMS Fixed C++ declaration and cast problems
02-May-05 RMS Added support for Pierce 7b format
28-Jul-04 RMS Fixed bug in writing error records (found by Dave Bryan)
RMS Fixed incorrect error codes (found by Dave Bryan)
05-Jan-04 RMS Revised for file I/O library
25-Apr-03 RMS Added extended file support
28-Mar-03 RMS Added E11 and TPC format support
Public routines:
sim_tape_attach attach tape unit
sim_tape_detach detach tape unit
sim_tape_attach_help help routine for attaching tapes
sim_tape_rdrecf read tape record forward
sim_tape_rdrecr read tape record reverse
sim_tape_wrrecf write tape record forward
sim_tape_sprecf space tape record forward
sim_tape_sprecr space tape record reverse
sim_tape_wrtmk write tape mark
sim_tape_wreom erase remainder of tape
sim_tape_wreomrw erase remainder of tape & rewind
sim_tape_wrgap write erase gap
sim_tape_errecf erase record forward
sim_tape_errecr erase record reverse
sim_tape_sprecsf space records forward
sim_tape_spfilef space files forward
sim_tape_sprecsr space records reverse
sim_tape_spfiler space files reverse
sim_tape_position generalized position
sim_tape_rewind rewind
sim_tape_reset reset unit
sim_tape_bot TRUE if at beginning of tape
sim_tape_eot TRUE if at or beyond end of tape
sim_tape_wrp TRUE if write protected
sim_tape_set_fmt set tape format
sim_tape_show_fmt show tape format
sim_tape_set_capac set tape capacity
sim_tape_show_capac show tape capacity
sim_tape_set_dens set tape density
sim_tape_show_dens show tape density
sim_tape_error_text the textual description of a tape status
sim_tape_set_async enable asynchronous operation
sim_tape_clr_async disable asynchronous operation
aim_tape_test unit test routine
*/
#include "sim_defs.h"
#include "sim_tape.h"
#include "sim_scp_private.h"
#ifndef MAX
#define MAX(a,b) (((a) >= (b)) ? (a) : (b))
#endif
#ifndef MIN
#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
#endif
#if defined SIM_ASYNCH_IO
#include <pthread.h>
#endif
static struct sim_tape_fmt {
const char *name; /* name */
int32 uflags; /* unit flags */
t_addr bot; /* bot test */
t_addr eom_remnant; /* potentially unprocessed data */
} fmts[] = {
{ "SIMH", 0, sizeof (t_mtrlnt) - 1, sizeof (t_mtrlnt) },
{ "E11", 0, sizeof (t_mtrlnt) - 1, sizeof (t_mtrlnt) },
{ "TPC", UNIT_RO, sizeof (t_tpclnt) - 1, sizeof (t_tpclnt) },
{ "P7B", 0, 0, 0 },
{ "AWS", 0, 0, 0 },
{ "TAR", UNIT_RO, 0, 0 },
{ "ANSI", UNIT_RO, 0, 0 },
{ "FIXED", UNIT_RO, 0, 0 },
{ "DOS11", UNIT_RO, 0, 0 },
{ NULL, 0, 0, 0 }
};
static const uint32 bpi [] = { /* tape density table, indexed by MT_DENS constants */
0, /* 0 = MT_DENS_NONE -- density not set */
200, /* 1 = MT_DENS_200 -- 200 bpi NRZI */
556, /* 2 = MT_DENS_556 -- 556 bpi NRZI */
800, /* 3 = MT_DENS_800 -- 800 bpi NRZI */
1600, /* 4 = MT_DENS_1600 -- 1600 bpi PE */
6250 /* 5 = MT_DENS_6250 -- 6250 bpi GCR */
};
#define BPI_COUNT (sizeof (bpi) / sizeof (bpi [0])) /* count of density table entries */
static t_stat sim_tape_ioerr (UNIT *uptr);
static t_stat sim_tape_wrdata (UNIT *uptr, uint32 dat);
static t_stat sim_tape_aws_wrdata (UNIT *uptr, uint8 *buf, t_mtrlnt bc);
static uint32 sim_tape_tpc_map (UNIT *uptr, t_addr *map, uint32 mapsize);
static t_stat sim_tape_validate_tape (UNIT *uptr);
static t_addr sim_tape_tpc_fnd (UNIT *uptr, t_addr *map);
static void sim_tape_data_trace (UNIT *uptr, const uint8 *data, size_t len, const char* txt, int detail, uint32 reason);
static t_stat tape_erase_fwd (UNIT *uptr, t_mtrlnt gap_size);
static t_stat tape_erase_rev (UNIT *uptr, t_mtrlnt gap_size);
struct tape_context {
DEVICE *dptr; /* Device for unit (access to debug flags) */
uint32 dbit; /* debugging bit for trace */
uint32 auto_format; /* Format determined dynamically */
uint8 *chunk_buf;
uint32 chunk_buf_size;
uint32 chunk_data_size;
uint32 chunk_offset;
#if defined SIM_ASYNCH_IO
t_bool asynch_io; /* Asynchronous Interrupt scheduling enabled */
int asynch_io_latency; /* instructions to delay pending interrupt */
pthread_mutex_t lock;
pthread_t io_thread; /* I/O Thread Id */
pthread_mutex_t io_lock;
pthread_cond_t io_cond;
pthread_cond_t io_done;
pthread_cond_t startup_cond;
int io_top;
uint8 *buf;
uint32 *bc;
uint32 *fc;
uint32 vbc;
uint32 max;
uint32 gaplen;
uint32 bpi;
uint32 *objupdate;
TAPE_PCALLBACK callback;
t_stat io_status;
#endif
};
#define tape_ctx up8 /* Field in Unit structure which points to the tape_context */
#if defined SIM_ASYNCH_IO
#define AIO_CALLSETUP \
struct tape_context *ctx = (struct tape_context *)uptr->tape_ctx; \
\
if (ctx == NULL) \
return sim_messagef (SCPE_IERR, "Bad Attach\n"); \
if ((callback == NULL) || !(ctx->asynch_io))
#define AIO_CALL(op, _buf, _bc, _fc, _max, _vbc, _gaplen, _bpi, _obj, _callback)\
if (ctx->asynch_io) { \
struct tape_context *ctx = \
(struct tape_context *)uptr->tape_ctx; \
\
pthread_mutex_lock (&ctx->io_lock); \
\
sim_debug_unit (ctx->dbit, uptr, \
"sim_tape AIO_CALL(op=%d, unit=%d)\n", op, (int)(uptr-ctx->dptr->units));\
\
if (ctx->callback) /* horrible mistake, stop */ \
SIM_SCP_ABORT ("AIO_CALL error"); \
ctx->io_top = op; \
ctx->buf = _buf; \
ctx->bc = _bc; \
ctx->fc = _fc; \
ctx->max = _max; \
ctx->vbc = _vbc; \
ctx->gaplen = _gaplen; \
ctx->bpi = _bpi; \
ctx->objupdate = _obj; \
ctx->callback = _callback; \
pthread_cond_signal (&ctx->io_cond); \
pthread_mutex_unlock (&ctx->io_lock); \
} \
else \
if (_callback) \
(_callback) (uptr, r);
#define TOP_DONE 0 /* close */
#define TOP_RDRF 1 /* sim_tape_rdrecf_a */
#define TOP_RDRR 2 /* sim_tape_rdrecr_a */
#define TOP_WREC 3 /* sim_tape_wrrecf_a */
#define TOP_WTMK 4 /* sim_tape_wrtmk_a */
#define TOP_WEOM 5 /* sim_tape_wreom_a */
#define TOP_WEMR 6 /* sim_tape_wreomrw_a */
#define TOP_WGAP 7 /* sim_tape_wrgap_a */
#define TOP_SPRF 8 /* sim_tape_sprecf_a */
#define TOP_SRSF 9 /* sim_tape_sprecsf_a */
#define TOP_SPRR 10 /* sim_tape_sprecr_a */
#define TOP_SRSR 11 /* sim_tape_sprecsr_a */
#define TOP_SPFF 12 /* sim_tape_spfilef */
#define TOP_SFRF 13 /* sim_tape_spfilebyrecf */
#define TOP_SPFR 14 /* sim_tape_spfiler */
#define TOP_SFRR 15 /* sim_tape_spfilebyrecr */
#define TOP_RWND 16 /* sim_tape_rewind_a */
#define TOP_POSN 17 /* sim_tape_position_a */
static void *
_tape_io(void *arg)
{
UNIT* volatile uptr = (UNIT*)arg;
struct tape_context *ctx = (struct tape_context *)uptr->tape_ctx;
/* Boost Priority for this I/O thread vs the CPU instruction execution
thread which in general won't be readily yielding the processor when
this thread needs to run */
sim_os_set_thread_priority (PRIORITY_ABOVE_NORMAL);
sim_debug_unit (ctx->dbit, uptr, "_tape_io(unit=%d) starting\n", (int)(uptr-ctx->dptr->units));
pthread_mutex_lock (&ctx->io_lock);
pthread_cond_signal (&ctx->startup_cond); /* Signal we're ready to go */
while (1) {
pthread_cond_wait (&ctx->io_cond, &ctx->io_lock);
if (ctx->io_top == TOP_DONE)
break;
pthread_mutex_unlock (&ctx->io_lock);
switch (ctx->io_top) {
case TOP_RDRF:
ctx->io_status = sim_tape_rdrecf (uptr, ctx->buf, ctx->bc, ctx->max);
break;
case TOP_RDRR:
ctx->io_status = sim_tape_rdrecr (uptr, ctx->buf, ctx->bc, ctx->max);
break;
case TOP_WREC:
ctx->io_status = sim_tape_wrrecf (uptr, ctx->buf, ctx->vbc);
break;
case TOP_WTMK:
ctx->io_status = sim_tape_wrtmk (uptr);
break;
case TOP_WEOM:
ctx->io_status = sim_tape_wreom (uptr);
break;
case TOP_WEMR:
ctx->io_status = sim_tape_wreomrw (uptr);
break;
case TOP_WGAP:
ctx->io_status = sim_tape_wrgap (uptr, ctx->gaplen);
break;
case TOP_SPRF:
ctx->io_status = sim_tape_sprecf (uptr, ctx->bc);
break;
case TOP_SRSF:
ctx->io_status = sim_tape_sprecsf (uptr, ctx->vbc, ctx->bc);
break;
case TOP_SPRR:
ctx->io_status = sim_tape_sprecr (uptr, ctx->bc);
break;
case TOP_SRSR:
ctx->io_status = sim_tape_sprecsr (uptr, ctx->vbc, ctx->bc);
break;
case TOP_SPFF:
ctx->io_status = sim_tape_spfilef (uptr, ctx->vbc, ctx->bc);
break;
case TOP_SFRF:
ctx->io_status = sim_tape_spfilebyrecf (uptr, ctx->vbc, ctx->bc, ctx->fc, ctx->max);
break;
case TOP_SPFR:
ctx->io_status = sim_tape_spfiler (uptr, ctx->vbc, ctx->bc);
break;
case TOP_SFRR:
ctx->io_status = sim_tape_spfilebyrecr (uptr, ctx->vbc, ctx->bc, ctx->fc);
break;
case TOP_RWND:
ctx->io_status = sim_tape_rewind (uptr);
break;
case TOP_POSN:
ctx->io_status = sim_tape_position (uptr, ctx->vbc, ctx->gaplen, ctx->bc, ctx->bpi, ctx->fc, ctx->objupdate);
break;
}
pthread_mutex_lock (&ctx->io_lock);
ctx->io_top = TOP_DONE;
pthread_cond_signal (&ctx->io_done);
sim_activate (uptr, ctx->asynch_io_latency);
}
pthread_mutex_unlock (&ctx->io_lock);
sim_debug_unit (ctx->dbit, uptr, "_tape_io(unit=%d) exiting\n", (int)(uptr-ctx->dptr->units));
return NULL;
}
/* This routine is called in the context of the main simulator thread before
processing events for any unit. It is only called when an asynchronous
thread has called sim_activate() to activate a unit. The job of this
routine is to put the unit in proper condition to digest what may have
occurred in the asynchronous thread.
Since tape processing only handles a single I/O at a time to a
particular tape device, we have the opportunity to possibly detect
improper attempts to issue multiple concurrent I/O requests. */
static void _tape_completion_dispatch (UNIT *uptr)
{
struct tape_context *ctx = (struct tape_context *)uptr->tape_ctx;
TAPE_PCALLBACK callback = ctx->callback;
sim_debug_unit (ctx->dbit, uptr, "_tape_completion_dispatch(unit=%d, top=%d, callback=%p)\n", (int)(uptr-ctx->dptr->units), ctx->io_top, ctx->callback);
if (ctx->io_top != TOP_DONE)
SIM_SCP_ABORT ("_tape_completion_dispatch()"); /* horribly wrong, stop */
if (ctx->asynch_io)
pthread_mutex_lock (&ctx->io_lock);
if (ctx->callback) {
ctx->callback = NULL;
if (ctx->asynch_io)
pthread_mutex_unlock (&ctx->io_lock);
callback (uptr, ctx->io_status);
}
else {
if (ctx->asynch_io)
pthread_mutex_unlock (&ctx->io_lock);
}
}
static t_bool _tape_is_active (UNIT *uptr)
{
struct tape_context *ctx = (struct tape_context *)uptr->tape_ctx;
if (ctx) {
sim_debug_unit (ctx->dbit, uptr, "_tape_is_active(unit=%d, top=%d)\n", (int)(uptr-ctx->dptr->units), ctx->io_top);
return (ctx->io_top != TOP_DONE);
}
return FALSE;
}
static t_bool _tape_cancel (UNIT *uptr)
{
struct tape_context *ctx = (struct tape_context *)uptr->tape_ctx;
if (ctx) {
sim_debug_unit (ctx->dbit, uptr, "_tape_cancel(unit=%d, top=%d)\n", (int)(uptr-ctx->dptr->units), ctx->io_top);
if (ctx->asynch_io) {
pthread_mutex_lock (&ctx->io_lock);
while (ctx->io_top != TOP_DONE)
pthread_cond_wait (&ctx->io_done, &ctx->io_lock);
pthread_mutex_unlock (&ctx->io_lock);
}
}
return FALSE;
}
#else
#define AIO_CALLSETUP \
if (uptr->tape_ctx == NULL) \
return sim_messagef (SCPE_IERR, "Bad Attach\n");
#define AIO_CALL(op, _buf, _fc, _bc, _max, _vbc, _gaplen, _bpi, _obj, _callback) \
if (_callback) \
(_callback) (uptr, r);
#endif
#define MIN_RECORD_SIZE 14 /* Mag tape records <14 bytes are considered noise */
#define MAX_RECORD_SIZE 65535 /* DEC tape controllers have a 16-bit byte count reg */
typedef struct VOL1 {
char type[3]; /* VOL */
char num; /* 1 */
char ident[6]; /* <ansi <a> characters blank padded > */
char accessibity; /* blank */
char reserved1[13]; /* */
char implement[13]; /* */
char owner[14]; /* */
char reserved2[28]; /* */
char standard; /* 1,3 or 4 */
} VOL1;
typedef struct HDR1 { /* Also EOF1, EOV1 */
char type[3]; /* HDR|EOF|EOV */
char num; /* 1 */
char file_ident[17]; /* filename */
char file_set[6]; /* label ident */
char file_section[4]; /* 0001 */
char file_sequence[4]; /* 0001 */
char generation_number[4]; /* 0001 */
char version_number[2]; /* 00 */
char creation_date[6]; /* cyyddd */
char expiration_date[6];
char accessibility; /* space */
char block_count[6]; /* 000000 */
char system_code[13]; /* */
char reserved[7]; /* blank */
} HDR1;
typedef struct HDR2 { /* Also EOF2, EOV2 */
char type[3]; /* HDR */
char num; /* 2 */
char record_format; /* F(fixed)|D(variable)|S(spanned) */
char block_length[5]; /* label ident */
char record_length[5]; /* */
char reserved_os1[21]; /* */
char carriage_control; /* A - Fortran CC, M - Record contained CC, space - CR/LF to be added */
char reserved_os2[13]; /* */
char buffer_offset[2]; /* */
char reserved_std[28]; /* */
} HDR2;
typedef struct HDR3 { /* Also EOF3, EOV3 */
char type[3]; /* HDR */
char num; /* 3 */
char rms_attributes[64]; /* 32 bytes of RMS attributes, converted to hex */
char reserved[12]; /* */
} HDR3;
typedef struct HDR4 { /* Also EOF4, EOV4 */
char type[3]; /* HDR */
char num; /* 4 */
char blank; /* blank */
char extra_name[62]; /* */
char extra_name_used[2]; /* 99 */
char unused[11];
} HDR4;
typedef struct TAPE_RECORD {
uint32 size;
uint8 data[1];
} TAPE_RECORD;
typedef struct MEMORY_TAPE {
uint32 ansi_type; /* ANSI-VMS, ANSI-RT11, ANSI-RSTS, ANSI-RSX11, etc. */
uint32 file_count; /* number of labeled files */
uint32 record_count; /* number of entries in the record array */
uint32 array_size; /* allocated size of records array */
uint32 block_size; /* tape block size */
TAPE_RECORD **records;
VOL1 vol1;
} MEMORY_TAPE;
const char HDR3_RMS_STREAM[] = "HDR3020002040000"
"0000000100000000"
"0000000002000000"
"0000000000000000"
"0000 ";
const char HDR3_RMS_STMLF[] = "HDR3020002050000"
"0000000100000000"
"0000000002000000"
"0000000000000000"
"0000 ";
const char HDR3_RMS_FIXED[] = "HDR3020000010000"
"0000000100000000"
"0000000002000000"
"0000000000000000"
"0000 ";
const char HDR3_RMS_VARRSX[] = "HDR300000A020000"
"0000000100000000"
"0000000000000000"
"0000000000000000"
"0000 ";
const char HDR3_RMS_FIXRSX[] = "HDR3020008010000"
"0000000100000000"
"0000000000000000"
"0000000000000000"
"0000 ";
static struct ansi_tape_parameters {
const char *name; /* operating system */
const char *system_code; /* */
t_bool nohdr2; /* no HDR2 records */
t_bool nohdr3; /* no HDR2 records */
t_bool fixed_text; /* */
char vol1_standard; /* 3 or 4 */
const char *hdr3_fixed; /* HDR3 template for Fixed format files */
const char *hdr3_lf_line_endings; /* HDR3 template for text with LF line ending files */
const char *hdr3_crlf_line_endings;/* HDR3 template for text with CRLF line ending files */
int skip_lf_line_endings;
int skip_crlf_line_endings;
t_bool y2k_date_bug;
t_bool zero_record_length;
char record_format;
char carriage_control;
} ansi_args[] = { /* code nohdr2 nohdr3 fixed_text lvl hdr3 for fixed hdr3 for lf hdr3 for crlf skLF CRLF Y2KDT 0RecLnt RFM CC*/
{"ANSI-VMS" , "DECFILE11A", FALSE, FALSE, FALSE, '3', HDR3_RMS_FIXED, HDR3_RMS_STMLF, HDR3_RMS_STREAM, 0, 0, FALSE, FALSE, 0, 0},
{"ANSI-RSX11" , "DECFILE11A", FALSE, FALSE, FALSE, '4', HDR3_RMS_FIXRSX, HDR3_RMS_VARRSX, HDR3_RMS_VARRSX, 1, 2, FALSE, FALSE, 0, 0},
{"ANSI-RT11" , "DECRT11A", TRUE, TRUE, TRUE, '3', NULL, NULL, NULL, 0, 0, FALSE, FALSE, 0, 0},
{"ANSI-RSTS" , "DECRSTS/E", FALSE, TRUE, TRUE, '3', NULL, NULL, NULL, 0, 0, TRUE, TRUE, 'U', 'M'},
{"ANSI-VAR" , "DECRSTS/E", FALSE, TRUE, FALSE, '3', NULL, NULL, NULL, 1, 2, TRUE, FALSE, 'D', ' '},
{NULL}
};
static MEMORY_TAPE *ansi_create_tape (const char *label, uint32 block_size, uint32 ansi_type);
static MEMORY_TAPE *memory_create_tape (void);
static void memory_free_tape (void *vtape);
static void sim_tape_add_ansi_entry (const char *directory,
const char *filename,
t_offset FileSize,
const struct stat *filestat,
void *context);
static t_bool memory_tape_add_block (MEMORY_TAPE *tape, uint8 *block, uint32 size);
typedef struct DOS11_HDR {
uint16 fname[2]; /* File name (RAD50 - 6 characters) */
uint16 ext; /* Extension (RAD50 - 3 characters) */
uint8 prog; /* Programmer # */
uint8 proj; /* Project # */
uint16 prot; /* Protection */
uint16 date; /* (year - 1970) * 1000 + day of year */
uint16 fname3; /* File name (RAD50 - 3 characters) */
} DOS11_HDR;
#define DOS11_PROT 0233
static void sim_tape_add_dos11_entry (const char *directory,
const char *filename,
t_offset FileSize,
const struct stat *filestat,
void *context);
static t_stat sim_export_tape (UNIT *uptr, const char *export_file);
static FILE *tape_open_and_check_file(const char *filename);
static int tape_classify_file_contents (FILE *f, size_t *max_record_size, t_bool *lf_line_endings, t_bool *crlf_line_endings);
/* Enable asynchronous operation */
t_stat sim_tape_set_async (UNIT *uptr, int latency)
{
#if !defined(SIM_ASYNCH_IO)
return sim_messagef (SCPE_NOFNC, "Tape: can't operate asynchronously\r\n");
#else
struct tape_context *ctx = (struct tape_context *)uptr->tape_ctx;
pthread_attr_t attr;
ctx->asynch_io = sim_asynch_enabled;
ctx->asynch_io_latency = latency;
if (ctx->asynch_io) {
pthread_mutex_init (&ctx->io_lock, NULL);
pthread_cond_init (&ctx->io_cond, NULL);
pthread_cond_init (&ctx->io_done, NULL);
pthread_cond_init (&ctx->startup_cond, NULL);
pthread_attr_init(&attr);
pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
pthread_mutex_lock (&ctx->io_lock);
pthread_create (&ctx->io_thread, &attr, _tape_io, (void *)uptr);
pthread_attr_destroy(&attr);
pthread_cond_wait (&ctx->startup_cond, &ctx->io_lock); /* Wait for thread to stabilize */
pthread_mutex_unlock (&ctx->io_lock);
pthread_cond_destroy (&ctx->startup_cond);
}
uptr->a_check_completion = _tape_completion_dispatch;
uptr->a_is_active = _tape_is_active;
uptr->cancel = _tape_cancel;
return SCPE_OK;
#endif
}
/* Disable asynchronous operation */
t_stat sim_tape_clr_async (UNIT *uptr)
{
#if !defined(SIM_ASYNCH_IO)
return SCPE_NOFNC;
#else
struct tape_context *ctx = (struct tape_context *)uptr->tape_ctx;
/* make sure device exists */
if (!ctx) return SCPE_UNATT;
if (ctx->asynch_io) {
pthread_mutex_lock (&ctx->io_lock);
ctx->asynch_io = FALSE;
pthread_cond_signal (&ctx->io_cond);
pthread_mutex_unlock (&ctx->io_lock);
pthread_join (ctx->io_thread, NULL);
pthread_mutex_destroy (&ctx->io_lock);
pthread_cond_destroy (&ctx->io_cond);
pthread_cond_destroy (&ctx->io_done);
}
return SCPE_OK;
#endif
}
t_stat sim_tape_set_chunk_mode (UNIT *uptr, uint32 chunk_size)
{
uptr->tape_chunk_size = chunk_size;
return SCPE_OK;
}
/*
This routine is called when the simulator stops and any time
the asynch mode is changed (enabled or disabled)
*/
static void _sim_tape_io_flush (UNIT *uptr)
{
#if defined (SIM_ASYNCH_IO)
struct tape_context *ctx = (struct tape_context *)uptr->tape_ctx;
sim_tape_clr_async (uptr);
if (sim_asynch_enabled)
sim_tape_set_async (uptr, ctx->asynch_io_latency);
#endif
if (MT_GET_FMT (uptr) < MTUF_F_ANSI)
fflush (uptr->fileref);
}
static const char *_sim_tape_format_name (UNIT *uptr)
{
int32 f = MT_GET_FMT (uptr);
if (f == MTUF_F_ANSI)
return ansi_args[MT_GET_ANSI_TYP (uptr)].name;
else
return fmts[f].name;
}
/* Attach tape unit */
t_stat sim_tape_attach (UNIT *uptr, CONST char *cptr)
{
DEVICE *dptr;
if ((dptr = find_dev_from_unit (uptr)) == NULL)
return SCPE_NOATT;
return sim_tape_attach_ex (uptr, cptr, ((dptr->flags & DEV_DEBUG) || (dptr->debflags != NULL)) ? MTSE_DBG_API : 0, 0);
}
t_stat sim_tape_attach_ex (UNIT *uptr, const char *cptr, uint32 dbit, int completion_delay)
{
struct tape_context *ctx;
uint32 objc;
DEVICE *dptr;
char gbuf[CBUFSIZE];
char export_file[CBUFSIZE] = "";
t_stat r;
t_bool auto_format = FALSE;
t_bool had_debug = (sim_deb != NULL);
uint32 starting_dctrl = uptr->dctrl;
int32 saved_switches = sim_switches;
MEMORY_TAPE *tape = NULL;
if ((dptr = find_dev_from_unit (uptr)) == NULL)
return SCPE_NOATT;
if (sim_switches & SWMASK ('F')) { /* format spec? */
cptr = get_glyph (cptr, gbuf, 0); /* get spec */
if (*cptr == 0) /* must be more */
return sim_messagef (SCPE_2FARG, "Missing Format specifier and/or filename to attach\n");
if (sim_tape_set_fmt (uptr, 0, gbuf, NULL) != SCPE_OK)
return sim_messagef (SCPE_ARG, "Invalid Tape Format: %s\n", gbuf);
sim_switches = sim_switches & ~(SWMASK ('F')); /* Record Format specifier already processed */
auto_format = TRUE;
}
if (sim_switches & SWMASK ('B')) { /* Record Size (blocking factor)? */
cptr = get_glyph (cptr, gbuf, 0); /* get spec */
if (*cptr == 0) /* must be more */
return sim_messagef (SCPE_2FARG, "Missing Record Size and/or filename to attach\n");
if ((MT_GET_FMT (uptr) != MTUF_F_TAR) && /* -B is honored for TAR, */
(MT_GET_FMT (uptr) != MTUF_F_FIXED) && /* FIXED, */
((MT_GET_FMT (uptr) == MTUF_F_ANSI) &&
((MT_GET_ANSI_TYP (uptr) != MTAT_F_VMS) && /* ANSI-VMS, */
(MT_GET_ANSI_TYP (uptr) != MTAT_F_RSX11) && /* ANSI-RSX11, */
(MT_GET_ANSI_TYP (uptr) != MTAT_F_VAR)))) { /* and ANSI-VAR only */
sim_messagef (SCPE_ARG, "The -B option is ignored for %s format\n", _sim_tape_format_name (uptr));
}
else {
uint32 recsize = (uint32) get_uint (gbuf, 10, MAX_RECORD_SIZE, &r);
if ((r != SCPE_OK) || (recsize < MIN_RECORD_SIZE))
return sim_messagef (SCPE_ARG, "Invalid Tape Record Size: %s\n", gbuf);
uptr->recsize = recsize;
}
sim_switches = sim_switches & ~(SWMASK ('B')); /* Record Blocking Factor */
}
if (sim_switches & SWMASK ('E')) /* On-disk tape image file must exist? */
if (MT_GET_FMT (uptr) >= MTUF_F_ANSI) /* Does not apply to MEMORY_TAPE images */
sim_messagef (SCPE_ARG, "The -E option is ignored for %s format\n", _sim_tape_format_name (uptr));
if (fmts[MT_GET_FMT (uptr)].uflags & UNIT_RO) /* Force ReadOnly attach for TPC, */
sim_switches |= SWMASK ('R'); /* TAR, ANSI, FIXED and DOS11 */
if (sim_switches & SWMASK ('X')) /* Export as SIMH? */
cptr = get_glyph_nc (cptr, export_file, 0); /* get export file spec */
switch (MT_GET_FMT (uptr)) {
case MTUF_F_ANSI:
{
const char *ocptr = cptr;
char label[CBUFSIZE] = "simh";
int file_errors = 0;
if ((MT_GET_ANSI_TYP (uptr) == MTAT_F_RT11) ||
(MT_GET_ANSI_TYP (uptr) == MTAT_F_RSTS))
uptr->recsize = 512;
if (uptr->recsize == 0)
uptr->recsize = 2048;
tape = ansi_create_tape (label, uptr->recsize, MT_GET_ANSI_TYP (uptr));
uptr->fileref = (FILE *)tape;
if (uptr->fileref == NULL)
return SCPE_MEM;
while (*cptr != 0) { /* do all mods */
uint32 initial_file_count = tape->file_count;
cptr = get_glyph_nc (cptr, gbuf, ','); /* get filename */
r = sim_dir_scan (gbuf, sim_tape_add_ansi_entry, tape);
if (r != SCPE_OK)
sim_messagef (SCPE_ARG, "file not found: %s\n", gbuf);
if (tape->file_count == initial_file_count)
++file_errors;
}
if ((tape->file_count > 0) && (file_errors == 0)) {
r = SCPE_OK;
memory_tape_add_block (tape, NULL, 0); /* Tape Mark */
/* RT-11 and RSTS write three tape marks at the end of an ANSI volume */
/* RSX-11 and VMS do not, but there is no harm in the extra tape mark */
memory_tape_add_block (tape, NULL, 0); /* Tape Mark */
uptr->flags |= UNIT_ATT;
uptr->filename = (char *)malloc (strlen (ocptr) + 1);
strcpy (uptr->filename, ocptr);
uptr->tape_eom = tape->record_count;
}
else {
r = SCPE_ARG;
memory_free_tape (uptr->fileref);
uptr->fileref = NULL;
cptr = ocptr;
}
}
break;
case MTUF_F_FIXED:
{
FILE *f;
struct stat statb;
size_t max_record_size;
t_bool lf_line_endings;
t_bool crlf_line_endings;
uint8 *block = NULL;
int error = FALSE;
static const uint8 ascii2ebcdic[128] = {
0000,0001,0002,0003,0067,0055,0056,0057,
0026,0005,0045,0013,0014,0015,0016,0017,
0020,0021,0022,0023,0074,0075,0062,0046,
0030,0031,0077,0047,0034,0035,0036,0037,
0100,0117,0177,0173,0133,0154,0120,0175,
0115,0135,0134,0116,0153,0140,0113,0141,
0360,0361,0362,0363,0364,0365,0366,0367,
0370,0371,0172,0136,0114,0176,0156,0157,
0174,0301,0302,0303,0304,0305,0306,0307,
0310,0311,0321,0322,0323,0324,0325,0326,
0327,0330,0331,0342,0343,0344,0345,0346,
0347,0350,0351,0112,0340,0132,0137,0155,
0171,0201,0202,0203,0204,0205,0206,0207,
0210,0211,0221,0222,0223,0224,0225,0226,
0227,0230,0231,0242,0243,0244,0245,0246,
0247,0250,0251,0300,0152,0320,0241,0007};
memset (&statb, 0, sizeof (statb));
tape = memory_create_tape ();
uptr->fileref = (FILE *)tape;
if (uptr->fileref == NULL)
return SCPE_MEM;
f = fopen (cptr, "rb");
if (f == NULL) {
r = sim_messagef (SCPE_OPENERR, "Can't open: %s - %s\n", cptr, strerror (errno));
break;
}
if (fstat (fileno (f), &statb) != 0) {
r = sim_messagef (SCPE_OPENERR, "Can't stat: %s - %s\n", cptr, strerror (errno));
fclose (f);
break;
}
r = SCPE_OK;
tape_classify_file_contents (f, &max_record_size, &lf_line_endings, &crlf_line_endings);
if (!lf_line_endings && !crlf_line_endings) { /* binary file? */
if (uptr->recsize == 0)
uptr->recsize = 512;
if ((statb.st_size % uptr->recsize) != 0) {
r = sim_messagef (SCPE_ARG, "Binary file data is not a multiple of the specifyed record size (%d)\n", (int)uptr->recsize);
fclose (f);
break;
}
tape->block_size = uptr->recsize;
block = (uint8 *)malloc (tape->block_size);
while (!feof (f) && !error) {
size_t data_read = fread (block, 1, tape->block_size, f);
if (data_read == tape->block_size)
error = memory_tape_add_block (tape, block, tape->block_size);
else {
if (data_read != 0) {
r = sim_messagef (SCPE_ARG, "Read %u bytes of data when expecting %u bytes\n", (uint32)data_read, (uint32)tape->block_size);
error = TRUE;
}
}
}
}
else { /* text file */
if (uptr->recsize == 0)
uptr->recsize = max_record_size;
if (uptr->recsize < max_record_size) {
r = sim_messagef (SCPE_ARG, "Text file: %s has lines longer than %d. Max Line Size: %d\n", cptr, (int)uptr->recsize, (int)max_record_size);
fclose (f);
break;
}
tape->block_size = uptr->recsize;
block = (uint8 *)calloc (1, tape->block_size + 3);
while (!feof (f) && !error) {
if (fgets ((char *)block, tape->block_size + 3, f)) {
size_t len = strlen ((char *)block);
while ((len > 0) &&
((block[len - 1] == '\r') || (block[len - 1] == '\n')))
--len;
memset (block + len, ' ', tape->block_size - len);
if (sim_switches & SWMASK ('C')) {
uint32 i;
for (i = 0; i < tape->block_size; i++)
block[i] = ascii2ebcdic[block[i]];
}
error = memory_tape_add_block (tape, block, tape->block_size);
}
else
error = ferror (f);
}
}
free (block);
fclose (f);
if (error)
r = sim_messagef (SCPE_IERR, "Error processing input file %s\n", cptr);
else {
memory_tape_add_block (tape, NULL, 0); /* Tape Mark */
memory_tape_add_block (tape, NULL, 0); /* Tape Mark */
uptr->flags |= UNIT_ATT;
uptr->filename = (char *)malloc (strlen (cptr) + 1);
strcpy (uptr->filename, cptr);
uptr->tape_eom = tape->record_count;
}
}
break;
case MTUF_F_DOS11:
{
const char *ocptr = cptr;
int file_errors = 0;
uptr->recsize = 512;
tape = memory_create_tape();
tape->block_size = uptr->recsize;
uptr->fileref = (FILE *)tape;
if (uptr->fileref == NULL)
return SCPE_MEM;
while (*cptr != 0) {
uint32 initial_file_count = tape->file_count;
cptr = get_glyph_nc (cptr, gbuf, ','); /* Get filename */
r = sim_dir_scan (gbuf, sim_tape_add_dos11_entry, tape);
if (r != SCPE_OK)
sim_messagef (SCPE_ARG, "file not found: %s\n", gbuf);
if (tape->file_count == initial_file_count)
++file_errors;
}
if ((tape->file_count > 0) && (file_errors == 0)) {
r = SCPE_OK;
memory_tape_add_block (tape, NULL, 0); /* Tape Mark */
/* RSX-11 and RSTS write three tape marks at the end of a DOS volume */
/* VMS does not, but there is no harm in the extra tape mark */
memory_tape_add_block (tape, NULL, 0); /* Tape Mark */
uptr->flags |= UNIT_ATT;
uptr->filename = (char *)malloc (strlen (ocptr) + 1);
strcpy (uptr->filename, ocptr);
uptr->tape_eom = tape->record_count;
}
else {
r = SCPE_ARG;
cptr = ocptr;
}
}
break;
case MTUF_F_TAR:
if (uptr->recsize == 0)
uptr->recsize = TAR_DFLT_RECSIZE; /* Apply default block size */
if ((uptr->recsize % 512) != 0)
return sim_messagef (SCPE_ARG, "TAR format block size of %u is not a multiple of 512\n", uptr->recsize);
sim_switches |= SWMASK ('E'); /* The TAR file must exist */
/* fall through */
default:
r = attach_unit (uptr, (CONST char *)cptr); /* attach unit */
break;
}
if (r != SCPE_OK) { /* error? */
if (MT_GET_FMT (uptr) >= MTUF_F_ANSI) {
r = sim_messagef (r, "Error opening %s format internal tape image generated from: '%s'\n", _sim_tape_format_name (uptr), cptr);
memory_free_tape (uptr->fileref);
uptr->fileref = NULL;
}
else
r = sim_messagef (r, "Error opening %s format tape image: '%s' - %s\n", _sim_tape_format_name (uptr), cptr, strerror(errno));
if (auto_format) /* format was specified at attach time? */
sim_tape_set_fmt (uptr, 0, "SIMH", NULL); /* restore default format */
uptr->recsize = 0;
uptr->tape_eom = 0;
return r;
}
if ((sim_switches & SWMASK ('D')) && !had_debug) {
sim_switches |= SWMASK ('E');
sim_switches &= ~(SWMASK ('D') | SWMASK ('R') | SWMASK ('F'));
sim_set_debon (0, "STDOUT");
sim_switches = saved_switches;
}
if (sim_switches & SWMASK ('D'))
uptr->dctrl = MTSE_DBG_STR | MTSE_DBG_DAT;
uptr->tape_ctx = ctx = (struct tape_context *)calloc(1, sizeof(struct tape_context));
ctx->dptr = dptr; /* save DEVICE pointer */
ctx->dbit = dbit; /* save debug bit */
ctx->auto_format = auto_format; /* save that we auto selected format */
switch (MT_GET_FMT (uptr)) { /* case on format */
case MTUF_F_TPC: /* TPC */
objc = sim_tape_tpc_map (uptr, NULL, 0); /* get # objects */
if (objc == 0) { /* tape empty? */
sim_tape_detach (uptr);
r = SCPE_FMT; /* yes, complain */
}
uptr->filebuf = calloc (objc + 1, sizeof (t_addr));
if (uptr->filebuf == NULL) { /* map allocated? */
sim_tape_detach (uptr);
r = SCPE_MEM; /* no, complain */
}
uptr->hwmark = objc + 1; /* save map size */
sim_tape_tpc_map (uptr, (t_addr *) uptr->filebuf, objc);/* fill map */
break;
case MTUF_F_TAR: /* TAR */
uptr->hwmark = (t_addr)sim_fsize (uptr->fileref);
break;
default:
break;
}
if (r == SCPE_OK) {
sim_tape_validate_tape (uptr);
sim_tape_rewind (uptr);
#if defined (SIM_ASYNCH_IO)
sim_tape_set_async (uptr, completion_delay);
#endif
uptr->io_flush = _sim_tape_io_flush;
}
if ((sim_switches & SWMASK ('D')) && !had_debug)
sim_set_deboff (0, NULL);
if (sim_switches & SWMASK ('D'))
uptr->dctrl = starting_dctrl;
if ((r == SCPE_OK) && (sim_switches & SWMASK ('X')))
r = sim_export_tape (uptr, export_file);
return r;
}
/* Detach tape unit */
t_stat sim_tape_detach (UNIT *uptr)
{
struct tape_context *ctx;
uint32 f;
t_bool auto_format = FALSE;