mirror of
https://github.com/msgpack/msgpack-c.git
synced 2025-10-28 11:31:55 +01:00
514 lines
12 KiB
C
514 lines
12 KiB
C
#define NEED_newRV_noinc
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#define NEED_sv_2pv_flags
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#include "xshelper.h"
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#define MY_CXT_KEY "Data::MessagePack::_unpack_guts" XS_VERSION
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typedef struct {
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SV* msgpack_true;
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SV* msgpack_false;
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} my_cxt_t;
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START_MY_CXT
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// context data for execute_template()
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typedef struct {
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bool finished;
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bool utf8;
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SV* buffer;
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} unpack_user;
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#define UNPACK_USER_INIT { false, false, NULL }
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#include "msgpack/unpack_define.h"
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#define msgpack_unpack_struct(name) \
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struct template ## name
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#define msgpack_unpack_func(ret, name) \
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STATIC_INLINE ret template ## name
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#define msgpack_unpack_callback(name) \
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template_callback ## name
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#define msgpack_unpack_object SV*
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#define msgpack_unpack_user unpack_user
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void init_Data__MessagePack_unpack(pTHX_ bool const cloning) {
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// booleans are load on demand (lazy load).
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if(!cloning) {
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MY_CXT_INIT;
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MY_CXT.msgpack_true = NULL;
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MY_CXT.msgpack_false = NULL;
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}
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else {
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MY_CXT_CLONE;
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MY_CXT.msgpack_true = NULL;
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MY_CXT.msgpack_false = NULL;
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}
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}
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/* ---------------------------------------------------------------------- */
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/* utility functions */
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static SV*
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load_bool(pTHX_ const char* const name) {
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CV* const cv = get_cv(name, GV_ADD);
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dSP;
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ENTER;
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SAVETMPS;
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PUSHMARK(SP);
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call_sv((SV*)cv, G_SCALAR);
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SPAGAIN;
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SV* const sv = newSVsv(POPs);
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PUTBACK;
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FREETMPS;
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LEAVE;
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assert(sv);
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assert(sv_isobject(sv));
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if(!SvOK(sv)) {
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croak("Oops: Failed to load %"SVf, name);
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}
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return sv;
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}
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static SV*
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get_bool(bool const value) {
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dTHX;
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dMY_CXT;
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if(value) {
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if(!MY_CXT.msgpack_true) {
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MY_CXT.msgpack_true = load_bool(aTHX_ "Data::MessagePack::true");
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}
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return newSVsv(MY_CXT.msgpack_true);
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}
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else {
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if(!MY_CXT.msgpack_false) {
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MY_CXT.msgpack_false = load_bool(aTHX_ "Data::MessagePack::false");
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}
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return newSVsv(MY_CXT.msgpack_false);
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}
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}
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/* ---------------------------------------------------------------------- */
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struct template_context;
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typedef struct template_context msgpack_unpack_t;
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static void template_init(msgpack_unpack_t* u);
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static SV* template_data(msgpack_unpack_t* u);
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static int template_execute(msgpack_unpack_t* u PERL_UNUSED_DECL,
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const char* data, size_t len, size_t* off);
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STATIC_INLINE SV* template_callback_root(unpack_user* u PERL_UNUSED_DECL)
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{
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return NULL;
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}
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#if IVSIZE == 4
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STATIC_INLINE int template_callback_UV(unpack_user* u PERL_UNUSED_DECL, UV const d, SV** o)
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{
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dTHX;
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*o = newSVuv(d);
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return 0;
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}
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STATIC_INLINE int template_callback_IV(unpack_user* u PERL_UNUSED_DECL, IV const d, SV** o)
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{
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dTHX;
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*o = newSViv(d);
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return 0;
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}
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/* workaround win32 problems (my_snprintf(%llu) returns incorrect values ) */
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static char* str_from_uint64(char* buf_end, uint64_t v)
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{
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char *p = buf_end;
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*--p = '\0';
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do {
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*--p = '0' + v % 10;
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} while ((v /= 10) != 0);
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return p;
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}
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static const char* str_from_int64(char* buf_end, int64_t const v) {
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bool const minus = v < 0;
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char* p = str_from_uint64(buf_end, minus ? -v : v);
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if (minus)
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*--p = '-';
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return p;
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}
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static int template_callback_uint64(unpack_user* u PERL_UNUSED_DECL, uint64_t const d, SV** o)
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{
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dTHX;
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char tbuf[64];
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const char* const s = str_from_uint64(tbuf + sizeof(tbuf), d);
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*o = newSVpvn(s, tbuf + sizeof(tbuf) - 1 - s);
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return 0;
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}
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static int template_callback_int64(unpack_user* u PERL_UNUSED_DECL, int64_t const d, SV** o)
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{
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dTHX;
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char tbuf[64];
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const char* const s = str_from_int64(tbuf + sizeof(tbuf), d);
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*o = newSVpvn(s, tbuf + sizeof(tbuf) - 1 - s);
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return 0;
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}
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#else /* IVSIZE == 8 */
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STATIC_INLINE int template_callback_UV(unpack_user* u PERL_UNUSED_DECL, UV const d, SV** o)
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{
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dTHX;
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*o = newSVuv(d);
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return 0;
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}
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#define template_callback_uint64 template_callback_UV
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STATIC_INLINE int template_callback_IV(unpack_user* u PERL_UNUSED_DECL, IV const d, SV** o)
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{
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dTHX;
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*o = newSViv(d);
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return 0;
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}
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#define template_callback_int64 template_callback_IV
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#endif /* IVSIZE */
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#define template_callback_uint8 template_callback_UV
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#define template_callback_uint16 template_callback_UV
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#define template_callback_uint32 template_callback_UV
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#define template_callback_int8 template_callback_IV
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#define template_callback_int16 template_callback_IV
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#define template_callback_int32 template_callback_IV
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#define template_callback_float template_callback_double
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STATIC_INLINE int template_callback_double(unpack_user* u PERL_UNUSED_DECL, double d, SV** o)
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{
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dTHX;
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*o = newSVnv(d);
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return 0;
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}
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/* &PL_sv_undef is not so good. see http://gist.github.com/387743 */
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STATIC_INLINE int template_callback_nil(unpack_user* u PERL_UNUSED_DECL, SV** o)
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{
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dTHX;
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*o = newSV(0);
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return 0;
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}
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STATIC_INLINE int template_callback_true(unpack_user* u PERL_UNUSED_DECL, SV** o)
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{
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*o = get_bool(true);
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return 0;
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}
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STATIC_INLINE int template_callback_false(unpack_user* u PERL_UNUSED_DECL, SV** o)
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{
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*o = get_bool(false);
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return 0;
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}
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STATIC_INLINE int template_callback_array(unpack_user* u PERL_UNUSED_DECL, unsigned int n, SV** o)
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{
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dTHX;
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AV* const a = newAV();
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*o = newRV_noinc((SV*)a);
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av_extend(a, n + 1);
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return 0;
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}
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STATIC_INLINE int template_callback_array_item(unpack_user* u PERL_UNUSED_DECL, SV** c, SV* o)
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{
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dTHX;
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AV* const a = (AV*)SvRV(*c);
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assert(SvTYPE(a) == SVt_PVAV);
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(void)av_store(a, AvFILLp(a) + 1, o); // the same as av_push(a, o)
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return 0;
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}
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STATIC_INLINE int template_callback_map(unpack_user* u PERL_UNUSED_DECL, unsigned int n, SV** o)
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{
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dTHX;
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HV* const h = newHV();
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hv_ksplit(h, n);
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*o = newRV_noinc((SV*)h);
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return 0;
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}
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STATIC_INLINE int template_callback_map_item(unpack_user* u PERL_UNUSED_DECL, SV** c, SV* k, SV* v)
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{
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dTHX;
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HV* const h = (HV*)SvRV(*c);
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assert(SvTYPE(h) == SVt_PVHV);
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(void)hv_store_ent(h, k, v, 0);
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SvREFCNT_dec(k);
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return 0;
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}
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STATIC_INLINE int template_callback_raw(unpack_user* u PERL_UNUSED_DECL, const char* b PERL_UNUSED_DECL, const char* p, unsigned int l, SV** o)
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{
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dTHX;
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/* newSVpvn(p, l) returns an undef if p == NULL */
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*o = ((l==0) ? newSVpvs("") : newSVpvn(p, l));
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if(u->utf8) {
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sv_utf8_decode(*o);
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}
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return 0;
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}
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#include "msgpack/unpack_template.h"
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#define UNPACKER(from, name) \
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msgpack_unpack_t *name; \
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{ \
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SV* const obj = from; \
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if(!(SvROK(obj) && SvIOK(SvRV(obj)))) { \
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Perl_croak(aTHX_ "Invalid unpacker instance for " #name); \
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} \
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name = INT2PTR(msgpack_unpack_t*, SvIVX(SvRV((obj)))); \
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if(name == NULL) { \
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Perl_croak(aTHX_ "NULL found for " # name " when shouldn't be"); \
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} \
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}
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XS(xs_unpack) {
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dXSARGS;
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SV* const data = ST(1);
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size_t limit;
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if (items == 2) {
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limit = sv_len(data);
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}
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else if(items == 3) {
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limit = SvUVx(ST(2));
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}
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else {
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Perl_croak(aTHX_ "Usage: Data::MessagePack->unpack('data' [, $limit])");
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}
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STRLEN dlen;
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const char* const dptr = SvPV_const(data, dlen);
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msgpack_unpack_t mp;
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template_init(&mp);
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unpack_user const u = UNPACK_USER_INIT;
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mp.user = u;
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size_t from = 0;
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int const ret = template_execute(&mp, dptr, (size_t)dlen, &from);
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SV* const obj = template_data(&mp);
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sv_2mortal(obj);
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if(ret < 0) {
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Perl_croak(aTHX_ "Data::MessagePack->unpack: parse error");
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} else if(ret == 0) {
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Perl_croak(aTHX_ "Data::MessagePack->unpack: insufficient bytes");
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} else {
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if(from < dlen) {
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Perl_croak(aTHX_ "Data::MessagePack->unpack: extra bytes");
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}
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}
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ST(0) = obj;
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XSRETURN(1);
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}
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/* ------------------------------ stream -- */
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/* http://twitter.com/frsyuki/status/13249304748 */
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XS(xs_unpacker_new) {
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dXSARGS;
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if (items != 1) {
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Perl_croak(aTHX_ "Usage: Data::MessagePack::Unpacker->new()");
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}
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SV* const self = sv_newmortal();
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msgpack_unpack_t *mp;
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Newxz(mp, 1, msgpack_unpack_t);
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template_init(mp);
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unpack_user const u = UNPACK_USER_INIT;
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mp->user = u;
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mp->user.buffer = newSV(80);
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sv_setpvs(mp->user.buffer, "");
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sv_setref_pv(self, "Data::MessagePack::Unpacker", mp);
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ST(0) = self;
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XSRETURN(1);
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}
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XS(xs_unpacker_utf8) {
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dXSARGS;
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if (!(items == 1 || items == 2)) {
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Perl_croak(aTHX_ "Usage: $unpacker->utf8([$bool)");
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}
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UNPACKER(ST(0), mp);
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mp->user.utf8 = (items == 1 || sv_true(ST(1))) ? true : false;
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XSRETURN(1); // returns $self
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}
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XS(xs_unpacker_get_utf8) {
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dXSARGS;
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if (items != 1) {
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Perl_croak(aTHX_ "Usage: $unpacker->get_utf8()");
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}
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UNPACKER(ST(0), mp);
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ST(0) = boolSV(mp->user.utf8);
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XSRETURN(1);
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}
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STATIC_INLINE size_t
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_execute_impl(SV* const self, SV* const data, UV const offset, UV const limit) {
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dTHX;
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if(offset >= limit) {
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Perl_croak(aTHX_
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"offset (%"UVuf") is bigger than data buffer size (%"UVuf")",
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offset, limit);
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}
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UNPACKER(self, mp);
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size_t from = offset;
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const char* dptr = SvPV_nolen_const(data);
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STRLEN dlen = limit;
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if(SvCUR(mp->user.buffer) != 0) {
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sv_catpvn(mp->user.buffer, dptr, dlen);
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dptr = SvPV_const(mp->user.buffer, dlen);
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from = 0;
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}
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int const ret = template_execute(mp, dptr, dlen, &from);
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// ret < 0 : error
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// ret == 0 : insufficient
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// ret > 0 : success
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if(ret < 0) {
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Perl_croak(aTHX_
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"Data::MessagePack::Unpacker: parse error while executing");
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}
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mp->user.finished = (ret > 0) ? true : false;
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if(!mp->user.finished) {
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template_init(mp); // reset the state
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sv_setpvn(mp->user.buffer, dptr, dlen);
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from = 0;
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}
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else {
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sv_setpvs(mp->user.buffer, "");
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}
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//warn(">> (%d) dlen=%d, from=%d, rest=%d",
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// (int)ret, (int)dlen, (int)from, dlen - from);
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return from;
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}
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XS(xs_unpacker_execute) {
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dXSARGS;
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SV* const self = ST(0);
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SV* const data = ST(1);
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UV offset;
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if (items == 2) {
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offset = 0;
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}
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else if (items == 3) {
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offset = SvUVx(ST(2));
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}
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else {
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Perl_croak(aTHX_ "Usage: $unpacker->execute(data, offset = 0)");
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}
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dXSTARG;
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sv_setuv(TARG, _execute_impl(self, data, offset, sv_len(data)));
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ST(0) = TARG;
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XSRETURN(1);
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}
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XS(xs_unpacker_execute_limit) {
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dXSARGS;
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if (items != 4) {
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Perl_croak(aTHX_ "Usage: $unpacker->execute_limit(data, offset, limit)");
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}
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SV* const self = ST(0);
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SV* const data = ST(1);
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UV const offset = SvUVx(ST(2));
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UV const limit = SvUVx(ST(3));
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dXSTARG;
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sv_setuv(TARG, _execute_impl(self, data, offset, limit));
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ST(0) = TARG;
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XSRETURN(1);
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}
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XS(xs_unpacker_is_finished) {
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dXSARGS;
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if (items != 1) {
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Perl_croak(aTHX_ "Usage: $unpacker->is_finished()");
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}
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UNPACKER(ST(0), mp);
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ST(0) = boolSV(mp->user.finished);
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XSRETURN(1);
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}
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XS(xs_unpacker_data) {
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dXSARGS;
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if (items != 1) {
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Perl_croak(aTHX_ "Usage: $unpacker->data()");
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}
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UNPACKER(ST(0), mp);
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ST(0) = template_data(mp);
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XSRETURN(1);
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}
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XS(xs_unpacker_reset) {
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dXSARGS;
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if (items != 1) {
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Perl_croak(aTHX_ "Usage: $unpacker->reset()");
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}
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UNPACKER(ST(0), mp);
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SV* const data = template_data(mp);
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SvREFCNT_dec(data);
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template_init(mp);
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sv_setpvs(mp->user.buffer, "");
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XSRETURN(0);
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}
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XS(xs_unpacker_destroy) {
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dXSARGS;
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if (items != 1) {
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Perl_croak(aTHX_ "Usage: $unpacker->DESTROY()");
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}
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UNPACKER(ST(0), mp);
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SV* const data = template_data(mp);
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SvREFCNT_dec(data);
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SvREFCNT_dec(mp->user.buffer);
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Safefree(mp);
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XSRETURN(0);
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}
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