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/*
* code is written by tokuhirom.
* buffer alocation technique is taken from JSON::XS. thanks to mlehmann.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "ppport.h"
#ifdef __cplusplus
};
#endif
#include "msgpack/pack_define.h"
#define msgpack_pack_inline_func(name) \
static inline void msgpack_pack ## name
#define msgpack_pack_inline_func_cint(name) \
static inline void msgpack_pack ## name
typedef struct {
char *cur; /* SvPVX (sv) + current output position */
char *end; /* SvEND (sv) */
SV *sv; /* result scalar */
} enc_t;
void need(enc_t *enc, STRLEN len);
#define msgpack_pack_user enc_t*
#define msgpack_pack_append_buffer(enc, buf, len) \
need(enc, len); \
memcpy(enc->cur, buf, len); \
enc->cur += len;
#include "msgpack/pack_template.h"
#define _PACK_WRAPPER(t) msgpack_pack_##t
#define PACK_WRAPPER(t) _PACK_WRAPPER(t)
#define INIT_SIZE 32 /* initial scalar size to be allocated */
void need(enc_t *enc, STRLEN len)
{
if (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;
}
}
static int s_pref_int = 0;
static int pref_int_set(pTHX_ SV* sv, MAGIC* mg) {
if (SvTRUE(sv)) {
s_pref_int = 1;
} else {
s_pref_int = 0;
}
return 0;
}
MGVTBL pref_int_vtbl = {
NULL,
pref_int_set,
NULL,
NULL,
NULL,
NULL,
NULL,
#ifdef MGf_LOCAL
NULL,
#endif
};
void boot_Data__MessagePack_pack(void) {
SV* var = get_sv("Data::MessagePack::PreferInteger", 0);
sv_magicext(var, NULL, PERL_MAGIC_ext, &pref_int_vtbl, NULL, 0);
SvSETMAGIC(var);
}
static int looks_like_int(const char *str, size_t len) {
int i;
for (i=0; i<len; i++) {
if (!isDIGIT(str[i])) {
return 0;
}
}
return 1;
}
static void _msgpack_pack_sv(enc_t *enc, SV* val) {
if (val==NULL) {
msgpack_pack_nil(enc);
return;
}
switch (SvTYPE(val)) {
case SVt_NULL:
msgpack_pack_nil(enc);
break;
case SVt_IV:
if (SvIOK_UV(val)) {
msgpack_pack_uint32(enc, SvUV(val));
} else {
PACK_WRAPPER(IVTYPE)(enc, SvIV(val));
}
break;
case SVt_PVNV:
{
STRLEN len = 0;
char *pv = SvPV(val, len);
if (len == 1 && *pv == '1') {
msgpack_pack_true(enc);
} else if (len == 0 && *pv==0) {
msgpack_pack_false(enc);
} else {
msgpack_pack_nil(enc);
}
}
break;
case SVt_NV:
PACK_WRAPPER(NVTYPE)(enc, SvNV(val));
break;
case SVt_PVAV:
{
AV* ary = (AV*)val;
int len = av_len(ary) + 1;
int i;
msgpack_pack_array(enc, len);
for (i=0; i<len; i++) {
SV** svp = av_fetch(ary, i, 0);
if (svp) {
_msgpack_pack_sv(enc, *svp);
} else {
msgpack_pack_nil(enc);
}
}
}
break;
case SVt_PVHV:
{
HV* hval = (HV*)val;
int count = hv_iterinit(hval);
HE* he;
msgpack_pack_map(enc, count);
while (he = hv_iternext(hval)) {
_msgpack_pack_sv(enc, hv_iterkeysv(he));
_msgpack_pack_sv(enc, HeVAL(he));
}
}
break;
case SVt_RV:
_msgpack_pack_sv(enc, SvRV(val));
break;
default:
if (SvPOKp(val)) {
STRLEN len;
char * cval = SvPV(val, len);
const int U32_STRLEN = 10; /* length(0xFFFFFFFF) */
if (s_pref_int && len <= U32_STRLEN && looks_like_int(cval, len) && SvUV(val) < U32_MAX) {
PACK_WRAPPER(uint32)(enc, SvUV(val));
return;
}
msgpack_pack_raw(enc, len);
msgpack_pack_raw_body(enc, cval, len);
return;
} else {
sv_dump(val);
Perl_croak(aTHX_ "msgpack for perl doesn't supported this type: %d\n", SvTYPE(val));
}
}
}
XS(xs_pack) {
dXSARGS;
if (items != 2) {
Perl_croak(aTHX_ "Usage: Data::MessagePack->pack($dat)");
}
SV* val = ST(1);
enc_t enc;
enc.sv = sv_2mortal(NEWSV(0, INIT_SIZE));
enc.cur = SvPVX(enc.sv);
enc.end = SvEND(enc.sv);
SvPOK_only(enc.sv);
_msgpack_pack_sv(&enc, val);
SvCUR_set(enc.sv, enc.cur - SvPVX (enc.sv));
*SvEND (enc.sv) = 0; /* many xs functions expect a trailing 0 for text strings */
ST(0) = enc.sv;
XSRETURN(1);
}
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