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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;
static 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 */
static 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 try_int(enc_t* enc, const char *p, size_t len) {
int negative = 0;
const char* pe = p + len;
uint64_t num = 0;
if (len == 0) { return 0; }
if (*p == '-') {
/* length(-0x80000000) == 11 */
if (len <= 1 || len > 11) { return 0; }
negative = 1;
++p;
} else {
/* length(0xFFFFFFFF) == 10 */
if (len > 10) { return 0; }
}
#if '9'=='8'+1 && '8'=='7'+1 && '7'=='6'+1 && '6'=='5'+1 && '5'=='4'+1 \
&& '4'=='3'+1 && '3'=='2'+1 && '2'=='1'+1 && '1'=='0'+1
do {
unsigned int c = ((int)*(p++)) - '0';
if (c > 9) { return 0; }
num = num * 10 + c;
} while(p < pe);
#else
do {
switch (*(p++)) {
case '0': num = num * 10 + 0; break;
case '1': num = num * 10 + 1; break;
case '2': num = num * 10 + 2; break;
case '3': num = num * 10 + 3; break;
case '4': num = num * 10 + 4; break;
case '5': num = num * 10 + 5; break;
case '6': num = num * 10 + 6; break;
case '7': num = num * 10 + 7; break;
case '8': num = num * 10 + 8; break;
case '9': num = num * 10 + 9; break;
default: return 0;
}
} while(p < pe);
#endif
if (negative) {
if (num > 0x80000000) { return 0; }
msgpack_pack_int32(enc, ((int32_t)num) * -1);
} else {
if (num > 0xFFFFFFFF) { return 0; }
msgpack_pack_uint32(enc, (uint32_t)num);
}
return 1;
}
static void _msgpack_pack_rv(enc_t *enc, SV* sv);
static void _msgpack_pack_sv(enc_t *enc, SV* sv) {
SvGETMAGIC(sv);
if (sv==NULL) {
msgpack_pack_nil(enc);
} else if (SvPOKp(sv)) {
STRLEN len;
char * csv = SvPV(sv, len);
if (s_pref_int && try_int(enc, csv, len)) {
return;
} else {
msgpack_pack_raw(enc, len);
msgpack_pack_raw_body(enc, csv, len);
}
} else if (SvNOKp(sv)) {
PACK_WRAPPER(NVTYPE)(enc, SvNVX(sv));
} else if (SvIOK_UV(sv)) {
msgpack_pack_uint32(enc, SvUV(sv));
} else if (SvIOKp(sv)) {
PACK_WRAPPER(IVTYPE)(enc, SvIV(sv));
} else if (SvROK(sv)) {
_msgpack_pack_rv(enc, SvRV(sv));
} else if (!SvOK(sv)) {
msgpack_pack_nil(enc);
} else if (isGV(sv)) {
Perl_croak(aTHX_ "msgpack cannot pack the GV\n");
} else {
sv_dump(sv);
Perl_croak(aTHX_ "msgpack for perl doesn't supported this type: %d\n", SvTYPE(sv));
}
}
static void _msgpack_pack_rv(enc_t *enc, SV* sv) {
svtype svt;
SvGETMAGIC(sv);
svt = SvTYPE(sv);
if (SvOBJECT (sv)) {
HV *stash = gv_stashpv ("Data::MessagePack::Boolean", 1); // TODO: cache?
if (SvSTASH (sv) == stash) {
if (SvIV(sv)) {
msgpack_pack_true(enc);
} else {
msgpack_pack_false(enc);
}
} else {
croak ("encountered object '%s', Data::MessagePack doesn't allow the object",
SvPV_nolen(sv_2mortal(newRV_inc(sv))));
}
} else if (svt == SVt_PVHV) {
HV* hval = (HV*)sv;
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));
}
} else if (svt == SVt_PVAV) {
AV* ary = (AV*)sv;
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);
}
}
} else if (svt < SVt_PVAV) {
STRLEN len = 0;
char *pv = svt ? SvPV (sv, len) : 0;
if (len == 1 && *pv == '1')
msgpack_pack_true(enc);
else if (len == 1 && *pv == '0')
msgpack_pack_false(enc);
else {
sv_dump(sv);
croak("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
SvPV_nolen (sv_2mortal (newRV_inc (sv))));
}
} else {
croak ("encountered %s, but msgpack can only represent references to arrays or hashes",
SvPV_nolen (sv_2mortal (newRV_inc (sv))));
}
}
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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