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XS.xs
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XS.xs
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#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#define NEED_load_module
#define NEED_newCONSTSUB
#define NEED_vload_module
#define NEED_vnewSVpvf
#define NEED_warner
#define NEED_grok_number
#define NEED_grok_numeric_radix
#define NEED_newRV_noinc
#define NEED_sv_2pv_flags
#include "ppport.h"
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <float.h>
#if defined(__BORLANDC__) || defined(_MSC_VER)
# define snprintf _snprintf // C compilers have this in stdio.h
#endif
#ifndef PERL_UNUSED_RESULT
# if defined(__GNUC__) && defined(HASATTRIBUTE_WARN_UNUSED_RESULT)
# define PERL_UNUSED_RESULT(v) STMT_START { __typeof__(v) z = (v); (void)sizeof(z); } STMT_END
# else
# define PERL_UNUSED_RESULT(v) ((void)(v))
# endif
#endif
#if defined(_AIX) && (!defined(HAS_LONG_DOUBLE) || AIX_WORKAROUND)
#define HAVE_NO_POWL
#endif
/* Freebsd 10: It has powl, but it is too bad. strtold is good. RT #101265 */
#if defined(__FreeBSD__) && defined(__clang__) && defined(USE_LONG_DOUBLE)
#define HAVE_BAD_POWL
#endif
#if PERL_VERSION < 22 && defined(HAS_SETLOCALE)
#define NEED_NUMERIC_LOCALE_C
#ifdef I_XLOCALE
#include <xlocale.h>
#endif
#endif
/* FIXME: still a refcount error */
#define HAVE_DECODE_BOM
#define UTF8BOM "\357\273\277" /* EF BB BF */
/* UTF16/32BOM is deprecated, RFC 8259 */
#define UTF16BOM "\377\376" /* FF FE or +UFEFF */
#define UTF16BOM_BE "\376\377" /* FE FF */
#define UTF32BOM "\377\376\000\000" /* FF FE 00 00 or +UFEFF */
#define UTF32BOM_BE "\000\000\376\377" /* 00 00 FE FF */
/* Need to disable broken gcc-9.[0-3] -O1. Assume gcc-10 is also still broken */
/* Only gcc defines __GNUC_PATCHLEVEL__, clang and icc do define __GNUC__ */
#if defined(__GNUC__) && defined(__GNUC_PATCHLEVEL__) && \
(((__GNUC__ == 9) && (__GNUC_MINOR__ <= 3) || \
(__GNUC__ > 9)))
# define BROKEN_GCC_OPT
#endif
/* mingw with USE_LONG_DOUBLE (and implied USE_MINGW_ANSI_STDIO) do use the
non-msvcrt inf/nan stringification in sprintf(). */
#if defined(WIN32) && !defined(__USE_MINGW_ANSI_STDIO) && !defined(USE_LONG_DOUBLE)
/* new ucrtd.dll runtime? We do not probe the runtime or variants in the Makefile.PL yet. */
#define STR_INF "inf"
#define STR_INF2 "inf.0"
#define STR_NAN "nan"
#define STR_QNAN "nan(ind)"
/* old standard msvcrt.dll */
#define STR_INF3 "1.#INF"
#define STR_INF4 "1.#INF.0"
#define STR_NAN2 "1.#IND"
#define STR_QNAN2 "1.#QNAN"
#define HAVE_QNAN
#elif defined(sun) || defined(__sun)
#define STR_INF "Infinity"
#define STR_NAN "NaN"
#elif defined(__hpux)
#define STR_INF "++"
#define STR_NAN "-?"
#define HAVE_NEG_NAN
#define STR_NEG_INF "---"
#define STR_NEG_NAN "?"
#elif defined(_AIX) || defined(_AIX50)
/* xlC compiler: __TOS_AIX__ FIXME: This does not work yet. GH #165 */
#define STR_INF "INF"
#define STR_INF2 "INF.0"
#define HAVE_NEG_NAN
#define STR_NEG_INF "-INF"
#define HAVE_NEG_NAN
#define HAVE_QNAN
#define STR_NAN "NaN"
#define STR_QNAN "NaNQ"
//#define STR_QNAN "NANQ"
#else
#define STR_INF "inf"
#define STR_NAN "nan"
#endif
/* NV_INF compatibility for Perl 5.6 */
#if !defined(NV_INF) && defined(USE_LONG_DOUBLE) && defined(LDBL_INFINITY)
# define NV_INF LDBL_INFINITY
#endif
#if !defined(NV_INF) && defined(DBL_INFINITY)
# define NV_INF (NV)DBL_INFINITY
#endif
#if !defined(NV_INF) && defined(INFINITY)
# define NV_INF (NV)INFINITY
#endif
#if !defined(NV_INF) && defined(INF)
# define NV_INF (NV)INF
#endif
#if !defined(NV_INF) && defined(USE_LONG_DOUBLE) && defined(HUGE_VALL)
# define NV_INF (NV)HUGE_VALL
#endif
#if !defined(NV_INF) && defined(HUGE_VAL)
# define NV_INF (NV)HUGE_VAL
#endif
/* NV_NAN compatibility for Perl 5.6 */
#if !defined(NV_NAN) && defined(USE_LONG_DOUBLE)
# if !defined(NV_NAN) && defined(LDBL_NAN)
# define NV_NAN LDBL_NAN
# endif
# if !defined(NV_NAN) && defined(LDBL_QNAN)
# define NV_NAN LDBL_QNAN
# endif
# if !defined(NV_NAN) && defined(LDBL_SNAN)
# define NV_NAN LDBL_SNAN
# endif
#endif
#if !defined(NV_NAN) && defined(DBL_NAN)
# define NV_NAN (NV)DBL_NAN
#endif
#if !defined(NV_NAN) && defined(DBL_QNAN)
# define NV_NAN (NV)DBL_QNAN
#endif
#if !defined(NV_NAN) && defined(DBL_SNAN)
# define NV_NAN (NV)DBL_SNAN
#endif
#if !defined(NV_NAN) && defined(QNAN)
# define NV_NAN (NV)QNAN
#endif
#if !defined(NV_NAN) && defined(SNAN)
# define NV_NAN (NV)SNAN
#endif
#if !defined(NV_NAN) && defined(NAN)
# define NV_NAN (NV)NAN
#endif
/* modfl() segfaults for -Duselongdouble && 64-bit mingw64 && mingw
runtime version 4.0 [perl #125924] */
#if defined(USE_LONG_DOUBLE) && defined(__MINGW64__) \
&& __MINGW64_VERSION_MAJOR == 4 && __MINGW64_VERSION_MINOR == 0
#undef HAS_MODFL
#undef Perl_modf
#define Perl_modf(nv, ip) mingw_modfl(nv, ip)
long double
mingw_modfl(long double x, long double *ip)
{
*ip = truncl(x);
return (x == *ip ? copysignl(0.0L, x) : x - *ip);
}
#endif
/* some old perls do not have this, try to make it work, no */
/* guarantees, though. if it breaks, you get to keep the pieces. */
#ifndef UTF8_MAXBYTES
# define UTF8_MAXBYTES 13
#endif
/* 5.6: */
#ifndef IS_NUMBER_IN_UV
#define IS_NUMBER_IN_UV 0x01 /* number within UV range (maybe not
int). value returned in pointed-
to UV */
#define IS_NUMBER_GREATER_THAN_UV_MAX 0x02 /* pointed to UV undefined */
#define IS_NUMBER_NOT_INT 0x04 /* saw . or E notation */
#define IS_NUMBER_NEG 0x08 /* leading minus sign */
#define IS_NUMBER_INFINITY 0x10 /* this is big */
#define IS_NUMBER_NAN 0x20 /* this is not */
#endif
#ifndef UNI_DISPLAY_QQ
#define UNI_DISPLAY_ISPRINT 0x0001
#define UNI_DISPLAY_BACKSLASH 0x0002
#define UNI_DISPLAY_QQ (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
#define UNI_DISPLAY_REGEX (UNI_DISPLAY_ISPRINT|UNI_DISPLAY_BACKSLASH)
#endif
/* with 5.6 hek can only be non-utf8 */
#ifndef HeKUTF8
#define HeKUTF8(he) 0
#endif
#ifndef GV_NOADD_NOINIT
#define GV_NOADD_NOINIT 0
#endif
/* since 5.8.1 */
#ifndef SvIsCOW_shared_hash
#define SvIsCOW_shared_hash(pv) 0
#endif
/* 5.8.1 has a broken assert_not_ROK */
#if PERL_VERSION == 8 && PERL_SUBVERSION == 1
# undef assert_not_ROK
# if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
# define assert_not_ROK(sv) ({assert(!SvROK(sv) || !SvRV(sv));}),
# else
# define assert_not_ROK(sv)
# endif
#endif
/* 5.8 problem, it was renamed to HINT_BYTES with 5.8.0 */
#if PERL_VERSION < 7
#ifndef HINT_BYTES
#define HINT_BYTES 8
#endif
#endif
/* compatibility with perl <5.14 */
/* added with 5.13.6 */
#ifndef sv_cmp_flags
# define sv_cmp_flags(a,b,flags) sv_cmp((a),(b))
#endif
#ifndef SvTRUE_nomg
#define SvTRUE_nomg SvTRUE
#endif
#ifndef SvNV_nomg
#define SvNV_nomg SvNV
#endif
#ifndef PERL_UNICODE_MAX
#define PERL_UNICODE_MAX 0x10FFFF
#endif
#ifndef HvNAMELEN_get
# define HvNAMELEN_get(hv) strlen (HvNAME (hv))
#endif
#ifndef HvNAMELEN
# define HvNAMELEN(hv) HvNAMELEN_get (hv)
#endif
#ifndef HvNAMEUTF8
# define HvNAMEUTF8(hv) 0
#endif
/* since 5.14 check use warnings 'nonchar' */
#ifdef WARN_NONCHAR
#define WARNER_NONCHAR(hi) \
Perl_ck_warner_d(aTHX_ packWARN(WARN_NONCHAR), \
"Unicode non-character U+%04" UVXf " is not " \
"recommended for open interchange", hi)
/* before check use warnings 'utf8' */
#elif PERL_VERSION > 10
#define WARNER_NONCHAR(hi) \
Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), \
"Unicode non-character U+%04" UVXf " is illegal " \
"for interchange", hi)
#else
#define WARNER_NONCHAR(hi) \
Perl_warner(aTHX_ packWARN(WARN_UTF8), \
"Unicode non-character U+%04lX is illegal", (unsigned long)hi)
#endif
/* since 5.16 */
#ifndef GV_NO_SVGMAGIC
#define GV_NO_SVGMAGIC 0
#endif
/* since 5.18 */
#ifndef SvREFCNT_dec_NN
#define SvREFCNT_dec_NN(sv) SvREFCNT_dec(sv)
#endif
/* from cperl */
#ifndef strEQc
/* the buffer ends with \0, includes comparison of the \0.
better than strEQ as it uses memcmp, word-wise comparison. */
# define strEQc(s, c) memEQ(s, ("" c ""), sizeof(c))
#endif
#ifndef memEQc
/* excluding the final \0, so the string s may continue */
# define memEQc(s, c) memEQ(s, ("" c ""), sizeof(c)-1)
#endif
#ifndef He_IS_SVKEY
# define He_IS_SVKEY(he) HeKLEN (he) == HEf_SVKEY
#endif
/* av_len has 2 different possible types */
#ifndef HVMAX_T
# if PERL_VERSION >= 20
# define HVMAX_T SSize_t
# else
# define HVMAX_T I32
# endif
#endif
/* and riter 3 */
#ifndef RITER_T
# ifdef USE_CPERL
# if PERL_VERSION >= 25
# define RITER_T U32
# else
# define RITER_T SSize_t
# endif
# else
# define RITER_T I32
# endif
#endif
#if (PERL_REVISION > 5) || (PERL_REVISION == 5 && PERL_VERSION >= 36)
# define PERL_HAVE_BOOLEANS
#endif
// i.e. "JSON" in big-endian
#define JSON_MAGIC 0x4A534F4E
/* types */
#define JSON_TYPE_SCALAR 0x0000
#define JSON_TYPE_BOOL 0x0001
#define JSON_TYPE_INT 0x0002
#define JSON_TYPE_FLOAT 0x0003
#define JSON_TYPE_STRING 0x0004
/* flags */
#define JSON_TYPE_CAN_BE_NULL 0x0100
/* null type */
#define JSON_TYPE_NULL JSON_TYPE_CAN_BE_NULL
/* classes */
#define JSON_TYPE_CLASS "Cpanel::JSON::XS::Type"
#define JSON_TYPE_ARRAYOF_CLASS "Cpanel::JSON::XS::Type::ArrayOf"
#define JSON_TYPE_HASHOF_CLASS "Cpanel::JSON::XS::Type::HashOf"
#define JSON_TYPE_ANYOF_CLASS "Cpanel::JSON::XS::Type::AnyOf"
#define JSON_TYPE_ANYOF_SCALAR_INDEX 0
#define JSON_TYPE_ANYOF_ARRAY_INDEX 1
#define JSON_TYPE_ANYOF_HASH_INDEX 2
/* three extra for rounding, sign, and end of string */
#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
#define F_ASCII 0x00000001UL
#define F_LATIN1 0x00000002UL
#define F_UTF8 0x00000004UL
#define F_INDENT 0x00000008UL
#define F_CANONICAL 0x00000010UL
#define F_SPACE_BEFORE 0x00000020UL
#define F_SPACE_AFTER 0x00000040UL
#define F_ALLOW_NONREF 0x00000100UL
#define F_SHRINK 0x00000200UL
#define F_ALLOW_BLESSED 0x00000400UL
#define F_CONV_BLESSED 0x00000800UL
#define F_RELAXED 0x00001000UL
#define F_ALLOW_UNKNOWN 0x00002000UL
#define F_ALLOW_TAGS 0x00004000UL
#define F_BINARY 0x00008000UL
#define F_ALLOW_BAREKEY 0x00010000UL
#define F_ALLOW_SQUOTE 0x00020000UL
#define F_ALLOW_BIGNUM 0x00040000UL
#define F_ESCAPE_SLASH 0x00080000UL
#define F_SORT_BY 0x00100000UL
#define F_ALLOW_STRINGIFY 0x00200000UL
#define F_UNBLESSED_BOOL 0x00400000UL
#define F_ALLOW_DUPKEYS 0x00800000UL
#define F_REQUIRE_TYPES 0x01000000UL
#define F_TYPE_ALL_STRING 0x02000000UL
#define F_DUPKEYS_AS_AREF 0x04000000UL
#define F_DUPKEYS_FIRST 0x08000000UL /* internal only */
#define F_HOOK 0x80000000UL /* some hooks exist, so slow-path processing */
#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
#define SET_RELAXED (F_RELAXED | F_ALLOW_BAREKEY | F_ALLOW_SQUOTE | F_ALLOW_DUPKEYS)
#define INIT_SIZE 32 /* initial scalar size to be allocated */
#define INDENT_STEP 3 /* default spaces per indentation level */
#define SHORT_STRING_LEN 16384 /* special-case strings of up to this size */
#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
#define SB do {
#define SE } while (0)
#if __GNUC__ >= 3
# define _expect(expr,value) __builtin_expect ((expr), (value))
# define INLINE static inline
#else
# define _expect(expr,value) (expr)
# define INLINE static
#endif
#ifndef LIKELY
#define LIKELY(expr) _expect ((long)(expr) != 0, 1)
#define UNLIKELY(expr) _expect ((long)(expr) != 0, 0)
#endif
#define IN_RANGE_INC(type,val,beg,end) \
((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
# define JSON_STASH MY_CXT.json_stash
#define MY_CXT_KEY "Cpanel::JSON::XS::_guts"
typedef struct {
HV *json_stash; /* Cpanel::JSON::XS:: */
HV *json_boolean_stash; /* JSON::PP::Boolean:: */
HV *jsonold_boolean_stash; /* JSON::XS::Boolean:: if empty will be (HV*)1 */
HV *mojo_boolean_stash; /* Mojo::JSON::_Bool:: if empty will be (HV*)1 */
SV *json_true, *json_false;
SV *sv_json;
} my_cxt_t;
/* the amount of HEs to allocate on the stack, when sorting keys */
#define STACK_HES 64
START_MY_CXT
INLINE SV * get_bool (pTHX_ const char *name);
enum {
INCR_M_WS = 0, /* initial whitespace skipping, must be 0 */
INCR_M_STR, /* inside string */
INCR_M_BS, /* inside backslash */
INCR_M_C0, /* inside comment in initial whitespace sequence */
INCR_M_C1, /* inside comment in other places */
INCR_M_JSON /* outside anything, count nesting */
};
#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
typedef struct {
U32 flags;
U32 max_depth;
U32 indent_length; /* how much padding to use when indenting */
STRLEN max_size;
SV *cb_object;
HV *cb_sk_object;
SV *cb_sort_by;
/* for the incremental parser */
SV *incr_text; /* the source text so far */
STRLEN incr_pos; /* the current offset into the text */
int incr_nest; /* {[]}-nesting level */
unsigned char incr_mode;
unsigned char infnan_mode;
/* corruption check */
U32 magic;
} JSON;
INLINE void
json_init (JSON *json)
{
Zero (json, 1, JSON);
json->max_depth = 512;
json->indent_length = INDENT_STEP;
json->magic = JSON_MAGIC;
}
/* dTHX/threads TODO
END dtor not needed for these, all of these *s refcnts are owned by the stash. */
static void
init_MY_CXT(pTHX_ my_cxt_t * cxt)
{
cxt->json_stash = gv_stashpvn ("Cpanel::JSON::XS", sizeof("Cpanel::JSON::XS")-1, 1);
cxt->json_boolean_stash = gv_stashpvn ("JSON::PP::Boolean", sizeof("JSON::PP::Boolean")-1, 1);
cxt->jsonold_boolean_stash = gv_stashpvn ("JSON::XS::Boolean", sizeof("JSON::XS::Boolean")-1, 0);
cxt->mojo_boolean_stash = gv_stashpvn ("Mojo::JSON::_Bool", sizeof("Mojo::JSON::_Bool")-1, 0);
if ( !cxt->mojo_boolean_stash )
cxt->mojo_boolean_stash = (HV*)1; /* invalid ptr to compare against, better than a NULL stash */
if ( !cxt->jsonold_boolean_stash )
cxt->jsonold_boolean_stash = (HV*)1;
cxt->json_true = get_bool (aTHX_ "Cpanel::JSON::XS::true");
cxt->json_false = get_bool (aTHX_ "Cpanel::JSON::XS::false");
cxt->sv_json = newSVpv ("JSON", 0);
SvREADONLY_on (cxt->sv_json);
}
/*/////////////////////////////////////////////////////////////////////////// */
/* utility functions */
/* Validate the JSON struct which might get corrupted by wrong FREEZE/THAW
methods, or other serializers, or corrupting our magic object.
E.g. https://github.com/rurban/Cpanel-JSON-XS/issues/192 */
INLINE bool
json_validate (JSON *json)
{
return json->magic == JSON_MAGIC;
}
/* Unpacks the 2 boolean objects from the global references */
INLINE SV *
get_bool (pTHX_ const char *name)
{
dMY_CXT;
#if PERL_VERSION > 7
SV *sv = get_sv (name, 1);
#else
SV *sv = GvSV(gv_fetchpv(name, 1, SVt_PV));
#endif
SV* rv = SvRV(sv);
if (!SvOBJECT(sv) || !SvSTASH(sv)) {
SvREADONLY_off (sv);
SvREADONLY_off (rv);
(void)sv_bless(sv, MY_CXT.json_boolean_stash); /* bless the ref */
}
SvREADONLY_on (rv);
SvREADONLY_on (sv);
return sv;
}
INLINE void
shrink (pTHX_ SV *sv)
{
/* ignore errors */
(void)sv_utf8_downgrade (sv, 1);
if (SvLEN (sv) > SvCUR (sv) + 1)
{
#ifdef SvPV_shrink_to_cur
SvPV_shrink_to_cur (sv);
#elif defined (SvPV_renew)
SvPV_renew (sv, SvCUR (sv) + 1);
#endif
}
}
/* Decode an utf-8 character and return it, or (UV)-1 in
case of an error.
We special-case "safe" characters from U+80 .. U+7FF,
but use the very good perl function until 5.36 to parse anything else.
note that we never call this function for an ascii codepoints.
With 5.36 perl5 removed the API to decode utf8 again with flags for relaxed,
so we have to hack around this regression again.
*/
INLINE UV
decode_utf8 (pTHX_ unsigned char *s, STRLEN len, int relaxed, STRLEN *clen)
{
if (LIKELY(len >= 2
&& IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
&& IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
{
*clen = 2;
return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
}
else {
/* Since perl 5.14 we can disallow illegal unicode above U+10FFFF.
Before we could only warn with warnings 'utf8'.
We accept only valid unicode, unless we are in the relaxed mode,
which allows SUPER, above U+10FFFF.
*/
#if PERL_VERSION > 36
UV c = utf8n_to_uvchr (s, len, clen,
UTF8_CHECK_ONLY | (relaxed ? 0 : UTF8_DISALLOW_SUPER));
#elif PERL_VERSION > 12
UV c = utf8n_to_uvuni (s, len, clen,
UTF8_CHECK_ONLY | (relaxed ? 0 : UTF8_DISALLOW_SUPER));
#elif PERL_VERSION >= 8
UV c = utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
#endif
#if PERL_VERSION >= 8 && PERL_VERSION <= 12
if (c > PERL_UNICODE_MAX && !relaxed)
*clen = -1;
#endif
#if PERL_VERSION >= 8
return c;
#else
/* 5.6 does not detect certain ill-formed sequences, esp. overflows,
which are security relevant. so we add code to detect these. */
UV c = utf8_to_uv(s, len, clen, UTF8_CHECK_ONLY);
if (!relaxed) {
if (!c || c > PERL_UNICODE_MAX)
*clen = -1;
/* need to check manually for some overflows. 5.6 unicode bug */
else if (len >= 2
&& IN_RANGE_INC (char, s[0], 0xc0, 0xfe)
&& !IN_RANGE_INC (char, s[0], 0xc2, 0xdf)) {
U8 *s0, *send;
UV uv = *s;
UV expectlen = UTF8SKIP(s);
#define UTF_CONTINUATION_MASK ((U8) ((1U << 6) - 1))
#define UTF_ACCUMULATION_OVERFLOW_MASK \
(((UV) UTF_CONTINUATION_MASK) << ((sizeof(UV) * 8) - 6))
s0 = s;
/*printf ("maybe overlong <%.*s> %d/%d %x %x\n", len, s, c,
*clen, s[0], s[1]);*/
if (*clen > 4) {
*clen = -1;
return c;
}
send = (U8*) s0 + ((expectlen <= len) ? len : len);
for (s = s0 + 1; s < send; s++) {
if (LIKELY(UTF8_IS_CONTINUATION(*s))) {
if (uv & UTF_ACCUMULATION_OVERFLOW_MASK) {
/*printf ("overflow\n");*/
*clen = -1;
return c;
}
uv = UTF8_ACCUMULATE(uv, *s);
}
else {
/*printf ("unexpected non continuation\n");*/
*clen = -1;
return c;
}
}
}
}
return c;
#endif
}
}
/* Likewise for encoding, also never called for ascii codepoints. */
/* This function takes advantage of this fact, although current gcc's */
/* seem to optimise the check for >= 0x80 away anyways. */
INLINE unsigned char *
encode_utf8 (unsigned char *s, UV ch)
{
if (UNLIKELY(ch < 0x000080))
*s++ = ch;
else if (LIKELY(ch < 0x000800))
*s++ = 0xc0 | ( ch >> 6),
*s++ = 0x80 | ( ch & 0x3f);
else if (ch < 0x010000)
*s++ = 0xe0 | ( ch >> 12),
*s++ = 0x80 | ((ch >> 6) & 0x3f),
*s++ = 0x80 | ( ch & 0x3f);
else if (ch < 0x110000)
*s++ = 0xf0 | ( ch >> 18),
*s++ = 0x80 | ((ch >> 12) & 0x3f),
*s++ = 0x80 | ((ch >> 6) & 0x3f),
*s++ = 0x80 | ( ch & 0x3f);
return s;
}
/* convert offset to character index, sv must be string */
static STRLEN
ptr_to_index (pTHX_ SV *sv, const STRLEN offset)
{
return SvUTF8 (sv)
? (STRLEN)utf8_distance ((U8*)(SvPVX(sv)+offset), (U8*)SvPVX (sv))
: offset;
}
/*/////////////////////////////////////////////////////////////////////////// */
/* fp hell */
#ifdef HAVE_NO_POWL
/* Ulisse Monari: this is a patch for AIX 5.3, perl 5.8.8 without HAS_LONG_DOUBLE
There Perl_pow maps to pow(...) - NOT TO powl(...), core dumps at Perl_pow(...)
Base code is from http://bytes.com/topic/c/answers/748317-replacement-pow-function
This is my change to fs_pow that goes into libc/libm for calling fmod/exp/log.
NEED TO MODIFY Makefile, after perl Makefile.PL by adding "-lm" onto the LDDLFLAGS line */
static double fs_powEx(double x, double y)
{
double p = 0;
if (0 > x && fmod(y, 1) == 0) {
if (fmod(y, 2) == 0) {
p = exp(log(-x) * y);
} else {
p = -exp(log(-x) * y);
}
} else {
if (x != 0 || 0 >= y) {
p = exp(log( x) * y);
}
}
return p;
}
#endif
#ifndef Perl_strtod
/* scan a group of digits, and a trailing exponent */
static void
json_atof_scan1 (const char *s, NV *accum, int *expo, int postdp, int maxdepth)
{
UV uaccum = 0;
int eaccum = 0;
#if defined(HAVE_BAD_POWL)
*accum = strtold(s, NULL);
#else
/* if we recurse too deep, skip all remaining digits */
/* to avoid a stack overflow attack */
if (UNLIKELY(--maxdepth <= 0))
while (((U8)*s - '0') < 10)
++s;
for (;;)
{
U8 dig = (U8)*s - '0';
if (UNLIKELY(dig >= 10))
{
if (dig == (U8)((U8)'.' - (U8)'0'))
{
++s;
json_atof_scan1 (s, accum, expo, 1, maxdepth);
}
else if ((dig | ' ') == 'e' - '0')
{
int exp2 = 0;
int neg = 0;
++s;
if (*s == '-')
{
++s;
neg = 1;
}
else if (*s == '+')
++s;
while ((dig = (U8)*s - '0') < 10)
exp2 = exp2 * 10 + *s++ - '0';
*expo += neg ? -exp2 : exp2;
}
break;
}
++s;
uaccum = uaccum * 10 + dig;
++eaccum;
/* if we have too many digits, then recurse for more */
/* we actually do this for rather few digits */
if (uaccum >= (UV_MAX - 9) / 10)
{
if (postdp) *expo -= eaccum;
json_atof_scan1 (s, accum, expo, postdp, maxdepth);
if (postdp) *expo += eaccum;
break;
}
}
/* This relies greatly on the quality of the pow ()
implementation of the platform, but a good
implementation is hard to beat.
(IEEE 754 conformant ones are required to be exact) */
if (postdp)
*expo -= eaccum;
#ifdef HAVE_NO_POWL
/* powf() unfortunately is not accurate enough */
*accum += uaccum * fs_powEx(10., *expo );
#else
*accum += uaccum * Perl_pow (10., *expo);
#endif
*expo += eaccum;
#endif
}
#endif
static NV
json_atof (const char *s)
{
NV accum = 0.;
#ifndef Perl_strtod
int expo = 0;
#endif
int neg = 0;
if (*s == '-')
{
++s;
neg = 1;
}
/* Fix accuracy mismatches compared to perl (using strtod).
Available since v5.21.4, but see perl5 af5a4640bf25a62438c05f73a87c1d6be6096b02.
Resets LC_NUMERIC only since v5.29.10. (dot, not comma)
See GH #154, where the pow method may return a different result than strtod.
*/
#ifdef Perl_strtod
accum = Perl_strtod (s, NULL);
#else
/* a recursion depth of ten gives us >>500 bits */
json_atof_scan1 (s, &accum, &expo, 0, 10);
#endif
return neg ? -accum : accum;
}
INLINE int
is_bignum_obj (pTHX_ SV *sv)
{
HV *stash = SvSTASH (sv);
return (stash == gv_stashpvs ("Math::BigInt", 0) || stash == gv_stashpvs ("Math::BigFloat", 0)) ? 1 : 0;
}
INLINE int
is_bool_obj (pTHX_ SV *sv)
{
dMY_CXT;
HV *bstash = MY_CXT.json_boolean_stash; /* JSON-XS-3.x interop (Types::Serialiser/JSON::PP::Boolean) */
HV *oldstash = MY_CXT.jsonold_boolean_stash; /* JSON-XS-2.x interop (JSON::XS::Boolean) */
HV *mstash = MY_CXT.mojo_boolean_stash; /* Mojo::JSON::_Bool interop */
HV *stash = SvSTASH (sv);
return (stash == bstash || stash == mstash || stash == oldstash) ? 1 : 0;
}
/* target of scalar reference is bool? -1 == nope, 0 == false, 1 == true */
static int
ref_bool_type (pTHX_ SV *sv)
{
svtype svt = SvTYPE (sv);
if (svt < SVt_PVAV)
{
STRLEN len = 0;
char *pv = svt ? SvPV_nomg (sv, len) : 0;
if (len == 1) {
if (*pv == '1')
return 1;
else if (*pv == '0')
return 0;
}
}
return -1;
}
/* returns whether scalar is not a reference in the sense of allow_nonref */
static int
json_nonref (pTHX_ SV *scalar)
{
if (!SvROK (scalar))
return 1;
scalar = SvRV (scalar);
if (!SvOBJECT (scalar) && ref_bool_type (aTHX_ scalar) >= 0)
return 1;
if (SvOBJECT (scalar) && is_bool_obj (aTHX_ scalar))
return 1;
return 0;
}
/*/////////////////////////////////////////////////////////////////////////// */
/* encoder */
/* structure used for encoding JSON */
typedef struct
{
char *cur; /* SvPVX (sv) + current output position */
char *end; /* SvEND (sv) */
SV *sv; /* result scalar */
JSON json;
U32 indent; /* indentation level */
UV limit; /* escape character values >= this value when encoding */
} enc_t;
INLINE void
need (pTHX_ enc_t *enc, STRLEN len)
{
#if PERL_VERSION > 8 || (PERL_VERSION == 8 && PERL_SUBVERSION >= 1)
DEBUG_v(Perl_deb(aTHX_ "need enc: %p %p %4ld, want: %lu\n", enc->cur, enc->end,
(long)(enc->end - enc->cur), (unsigned long)len));
#endif
assert(enc->cur <= enc->end);
if (UNLIKELY(enc->cur + len >= enc->end))
{
STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
enc->cur = SvPVX (enc->sv) + cur;
enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
}
}
INLINE void
encode_ch (pTHX_ enc_t *enc, char ch)
{
need (aTHX_ enc, 1);
*enc->cur++ = ch;
}
static void
encode_str (pTHX_ enc_t *enc, char *str, STRLEN len, int is_utf8)
{
char *end = str + len;
#if PERL_VERSION < 8
/* perl5.6 encodes to utf8 automatically, reverse it */
if (is_utf8 && (enc->json.flags & F_BINARY))
{
str = (char *)utf8_to_bytes((U8*)str, &len);
if (!str)
croak ("illegal unicode character in binary string", str);
end = str + len;
}
#endif
need (aTHX_ enc, len);
while (str < end)
{
unsigned char ch = *(unsigned char *)str;
#if PERL_VERSION > 8 || (PERL_VERSION == 8 && PERL_SUBVERSION >= 1)
DEBUG_v(Perl_deb(aTHX_ "str enc: %p %p %4ld, want: %lu\n", enc->cur, enc->end,
(long)(enc->end - enc->cur), (long unsigned)len));
#endif
if (LIKELY(ch >= 0x20 && ch < 0x80)) /* most common case */
{
assert(enc->cur <= enc->end);
if (UNLIKELY(ch == '"')) /* but with slow exceptions */
{
need (aTHX_ enc, 2);
*enc->cur++ = '\\';
*enc->cur++ = '"';
++len;
}
else if (UNLIKELY(ch == '\\'))
{
need (aTHX_ enc, 2);
*enc->cur++ = '\\';
*enc->cur++ = '\\';
++len;
}
else if (UNLIKELY(ch == '/' && (enc->json.flags & F_ESCAPE_SLASH)))
{
need (aTHX_ enc, 2);
*enc->cur++ = '\\';
*enc->cur++ = '/';
++len;
}
else {
need (aTHX_ enc, 1);
*enc->cur++ = ch;
}
++str;
}
else
{
assert(enc->cur <= enc->end);
switch (ch)
{
case '\010': need (aTHX_ enc, 2);
*enc->cur++ = '\\'; *enc->cur++ = 'b'; ++len; ++str; break;
case '\011': need (aTHX_ enc, 2);
*enc->cur++ = '\\'; *enc->cur++ = 't'; ++len; ++str; break;
case '\012': need (aTHX_ enc, 2);
*enc->cur++ = '\\'; *enc->cur++ = 'n'; ++len; ++str; break;
case '\014': need (aTHX_ enc, 2);
*enc->cur++ = '\\'; *enc->cur++ = 'f'; ++len; ++str; break;
case '\015': need (aTHX_ enc, 2);
*enc->cur++ = '\\'; *enc->cur++ = 'r'; ++len; ++str; break;
default:
{
STRLEN clen;
UV uch;
if (is_utf8 && !(enc->json.flags & F_BINARY))
{
uch = decode_utf8 (aTHX_ (unsigned char *)str, end - str,
enc->json.flags & F_RELAXED, &clen);
if (clen == (STRLEN)-1)
croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
}
else
{
uch = ch;
clen = 1;
}
if (uch < 0x80/*0x20*/ || uch >= enc->limit)
{
if (enc->json.flags & F_BINARY)
{
/* MB cannot arrive here */
need (aTHX_ enc, 4);
*enc->cur++ = '\\';
*enc->cur++ = 'x';
*enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
*enc->cur++ = PL_hexdigit [ uch & 15];
len += 3;
}
else if (uch >= 0x10000UL)
{
if (uch >= 0x110000UL)
croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);