mirror of
https://github.com/msgpack/msgpack-python.git
synced 2025-10-31 17:40:54 +00:00
386 lines
10 KiB
C
386 lines
10 KiB
C
/*
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* MessagePack unpacking routine template
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*
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* Copyright (C) 2008-2009 FURUHASHI Sadayuki
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef msgpack_unpack_func
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#error msgpack_unpack_func template is not defined
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#endif
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#ifndef msgpack_unpack_callback
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#error msgpack_unpack_callback template is not defined
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#endif
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#ifndef msgpack_unpack_struct
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#error msgpack_unpack_struct template is not defined
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#endif
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#ifndef msgpack_unpack_struct_decl
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#define msgpack_unpack_struct_decl(name) msgpack_unpack_struct(name)
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#endif
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#ifndef msgpack_unpack_object
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#error msgpack_unpack_object type is not defined
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#endif
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#ifndef msgpack_unpack_user
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#error msgpack_unpack_user type is not defined
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#endif
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#ifndef USE_CASE_RANGE
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#if !defined(_MSC_VER)
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#define USE_CASE_RANGE
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#endif
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#endif
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msgpack_unpack_struct_decl(_stack) {
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msgpack_unpack_object obj;
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size_t count;
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unsigned int ct;
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union {
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size_t curr;
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msgpack_unpack_object map_key;
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};
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};
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msgpack_unpack_struct_decl(_context) {
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msgpack_unpack_user user;
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unsigned int cs;
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unsigned int trail;
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unsigned int top;
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msgpack_unpack_struct(_stack) stack[MSGPACK_MAX_STACK_SIZE];
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};
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msgpack_unpack_func(void, _init)(msgpack_unpack_struct(_context)* ctx)
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{
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ctx->cs = CS_HEADER;
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ctx->trail = 0;
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ctx->top = 0;
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ctx->stack[0].obj = msgpack_unpack_callback(_root)(&ctx->user);
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}
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msgpack_unpack_func(msgpack_unpack_object, _data)(msgpack_unpack_struct(_context)* ctx)
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{
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return (ctx)->stack[0].obj;
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}
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msgpack_unpack_func(int, _execute)(msgpack_unpack_struct(_context)* ctx, const char* data, size_t len, size_t* off)
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{
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const unsigned char* p = (unsigned char*)data + *off;
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const unsigned char* const pe = (unsigned char*)data + len;
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const void* n = NULL;
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unsigned int trail = ctx->trail;
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unsigned int cs = ctx->cs;
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unsigned int top = ctx->top;
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msgpack_unpack_struct(_stack)* stack = ctx->stack;
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msgpack_unpack_user* user = &ctx->user;
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msgpack_unpack_object obj;
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msgpack_unpack_struct(_stack)* c = NULL;
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int ret;
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assert(len >= *off);
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#define push_simple_value(func) \
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if(msgpack_unpack_callback(func)(user, &obj) < 0) { goto _failed; } \
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goto _push
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#define push_fixed_value(func, arg) \
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if(msgpack_unpack_callback(func)(user, arg, &obj) < 0) { goto _failed; } \
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goto _push
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#define push_variable_value(func, base, pos, len) \
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if(msgpack_unpack_callback(func)(user, \
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(const char*)base, (const char*)pos, len, &obj) < 0) { goto _failed; } \
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goto _push
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#define again_fixed_trail(_cs, trail_len) \
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trail = trail_len; \
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cs = _cs; \
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goto _fixed_trail_again
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#define again_fixed_trail_if_zero(_cs, trail_len, ifzero) \
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trail = trail_len; \
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if(trail == 0) { goto ifzero; } \
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cs = _cs; \
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goto _fixed_trail_again
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#define start_container(func, count_, ct_) \
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if(msgpack_unpack_callback(func)(user, count_, &stack[top].obj) < 0) { goto _failed; } \
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if((count_) == 0) { obj = stack[top].obj; goto _push; } \
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if(top >= MSGPACK_MAX_STACK_SIZE) { goto _failed; } \
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stack[top].ct = ct_; \
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stack[top].curr = 0; \
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stack[top].count = count_; \
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/*printf("container %d count %d stack %d\n",stack[top].obj,count_,top);*/ \
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/*printf("stack push %d\n", top);*/ \
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++top; \
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goto _header_again
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#define NEXT_CS(p) \
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((unsigned int)*p & 0x1f)
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#define PTR_CAST_8(ptr) (*(uint8_t*)ptr)
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#define PTR_CAST_16(ptr) _msgpack_be16(*(uint16_t*)ptr)
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#define PTR_CAST_32(ptr) _msgpack_be32(*(uint32_t*)ptr)
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#define PTR_CAST_64(ptr) _msgpack_be64(*(uint64_t*)ptr)
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#ifdef USE_CASE_RANGE
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#define SWITCH_RANGE_BEGIN switch(*p) {
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#define SWITCH_RANGE(FROM, TO) case FROM ... TO:
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#define SWITCH_RANGE_DEFAULT default:
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#define SWITCH_RANGE_END }
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#else
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#define SWITCH_RANGE_BEGIN { if(0) {
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#define SWITCH_RANGE(FROM, TO) } else if(FROM <= *p && *p <= TO) {
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#define SWITCH_RANGE_DEFAULT } else {
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#define SWITCH_RANGE_END } }
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#endif
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if(p == pe) { goto _out; }
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do {
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switch(cs) {
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case CS_HEADER:
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SWITCH_RANGE_BEGIN
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SWITCH_RANGE(0x00, 0x7f) // Positive Fixnum
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push_fixed_value(_uint8, *(uint8_t*)p);
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SWITCH_RANGE(0xe0, 0xff) // Negative Fixnum
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push_fixed_value(_int8, *(int8_t*)p);
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SWITCH_RANGE(0xc0, 0xdf) // Variable
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switch(*p) {
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case 0xc0: // nil
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push_simple_value(_nil);
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//case 0xc1: // string
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// again_terminal_trail(NEXT_CS(p), p+1);
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case 0xc2: // false
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push_simple_value(_false);
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case 0xc3: // true
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push_simple_value(_true);
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//case 0xc4:
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//case 0xc5:
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//case 0xc6:
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//case 0xc7:
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//case 0xc8:
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//case 0xc9:
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case 0xca: // float
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case 0xcb: // double
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case 0xcc: // unsigned int 8
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case 0xcd: // unsigned int 16
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case 0xce: // unsigned int 32
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case 0xcf: // unsigned int 64
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case 0xd0: // signed int 8
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case 0xd1: // signed int 16
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case 0xd2: // signed int 32
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case 0xd3: // signed int 64
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again_fixed_trail(NEXT_CS(p), 1 << (((unsigned int)*p) & 0x03));
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//case 0xd4:
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//case 0xd5:
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//case 0xd6: // big integer 16
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//case 0xd7: // big integer 32
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//case 0xd8: // big float 16
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//case 0xd9: // big float 32
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case 0xda: // raw 16
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case 0xdb: // raw 32
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case 0xdc: // array 16
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case 0xdd: // array 32
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case 0xde: // map 16
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case 0xdf: // map 32
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again_fixed_trail(NEXT_CS(p), 2 << (((unsigned int)*p) & 0x01));
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default:
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goto _failed;
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}
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SWITCH_RANGE(0xa0, 0xbf) // FixRaw
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again_fixed_trail_if_zero(ACS_RAW_VALUE, ((unsigned int)*p & 0x1f), _raw_zero);
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SWITCH_RANGE(0x90, 0x9f) // FixArray
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start_container(_array, ((unsigned int)*p) & 0x0f, CT_ARRAY_ITEM);
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SWITCH_RANGE(0x80, 0x8f) // FixMap
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start_container(_map, ((unsigned int)*p) & 0x0f, CT_MAP_KEY);
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SWITCH_RANGE_DEFAULT
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goto _failed;
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SWITCH_RANGE_END
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// end CS_HEADER
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_fixed_trail_again:
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++p;
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default:
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if((size_t)(pe - p) < trail) { goto _out; }
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n = p; p += trail - 1;
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switch(cs) {
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//case CS_
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//case CS_
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case CS_FLOAT: {
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union { uint32_t num; char buf[4]; } f;
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f.num = PTR_CAST_32(n); // FIXME
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push_fixed_value(_float, *((float*)f.buf)); }
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case CS_DOUBLE: {
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union { uint64_t num; char buf[8]; } f;
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f.num = PTR_CAST_64(n); // FIXME
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push_fixed_value(_double, *((double*)f.buf)); }
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case CS_UINT_8:
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push_fixed_value(_uint8, (uint8_t)PTR_CAST_8(n));
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case CS_UINT_16:
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push_fixed_value(_uint16, (uint16_t)PTR_CAST_16(n));
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case CS_UINT_32:
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push_fixed_value(_uint32, (uint32_t)PTR_CAST_32(n));
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case CS_UINT_64:
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push_fixed_value(_uint64, (uint64_t)PTR_CAST_64(n));
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case CS_INT_8:
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push_fixed_value(_int8, (int8_t)PTR_CAST_8(n));
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case CS_INT_16:
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push_fixed_value(_int16, (int16_t)PTR_CAST_16(n));
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case CS_INT_32:
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push_fixed_value(_int32, (int32_t)PTR_CAST_32(n));
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case CS_INT_64:
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push_fixed_value(_int64, (int64_t)PTR_CAST_64(n));
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//case CS_
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//case CS_
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//case CS_BIG_INT_16:
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// again_fixed_trail_if_zero(ACS_BIG_INT_VALUE, (uint16_t)PTR_CAST_16(n), _big_int_zero);
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//case CS_BIG_INT_32:
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// again_fixed_trail_if_zero(ACS_BIG_INT_VALUE, (uint32_t)PTR_CAST_32(n), _big_int_zero);
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//case ACS_BIG_INT_VALUE:
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//_big_int_zero:
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// // FIXME
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// push_variable_value(_big_int, data, n, trail);
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//case CS_BIG_FLOAT_16:
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// again_fixed_trail_if_zero(ACS_BIG_FLOAT_VALUE, (uint16_t)PTR_CAST_16(n), _big_float_zero);
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//case CS_BIG_FLOAT_32:
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// again_fixed_trail_if_zero(ACS_BIG_FLOAT_VALUE, (uint32_t)PTR_CAST_32(n), _big_float_zero);
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//case ACS_BIG_FLOAT_VALUE:
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//_big_float_zero:
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// // FIXME
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// push_variable_value(_big_float, data, n, trail);
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case CS_RAW_16:
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again_fixed_trail_if_zero(ACS_RAW_VALUE, (uint16_t)PTR_CAST_16(n), _raw_zero);
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case CS_RAW_32:
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again_fixed_trail_if_zero(ACS_RAW_VALUE, (uint32_t)PTR_CAST_32(n), _raw_zero);
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case ACS_RAW_VALUE:
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_raw_zero:
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push_variable_value(_raw, data, n, trail);
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case CS_ARRAY_16:
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start_container(_array, (uint16_t)PTR_CAST_16(n), CT_ARRAY_ITEM);
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case CS_ARRAY_32:
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/* FIXME security guard */
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start_container(_array, (uint32_t)PTR_CAST_32(n), CT_ARRAY_ITEM);
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case CS_MAP_16:
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start_container(_map, (uint16_t)PTR_CAST_16(n), CT_MAP_KEY);
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case CS_MAP_32:
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/* FIXME security guard */
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start_container(_map, (uint32_t)PTR_CAST_32(n), CT_MAP_KEY);
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default:
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goto _failed;
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}
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}
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_push:
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if(top == 0) { goto _finish; }
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c = &stack[top-1];
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switch(c->ct) {
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case CT_ARRAY_ITEM:
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if(msgpack_unpack_callback(_array_item)(user, c->curr, &c->obj, obj) < 0) { goto _failed; }
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if(++c->curr == c->count) {
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msgpack_unpack_callback(_array_end)(user, &c->obj);
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obj = c->obj;
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--top;
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/*printf("stack pop %d\n", top);*/
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goto _push;
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}
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goto _header_again;
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case CT_MAP_KEY:
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c->map_key = obj;
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c->ct = CT_MAP_VALUE;
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goto _header_again;
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case CT_MAP_VALUE:
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if(msgpack_unpack_callback(_map_item)(user, &c->obj, c->map_key, obj) < 0) { goto _failed; }
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if(--c->count == 0) {
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msgpack_unpack_callback(_map_end)(user, &c->obj);
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obj = c->obj;
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--top;
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/*printf("stack pop %d\n", top);*/
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goto _push;
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}
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c->ct = CT_MAP_KEY;
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goto _header_again;
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default:
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goto _failed;
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}
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_header_again:
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cs = CS_HEADER;
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++p;
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} while(p != pe);
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goto _out;
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_finish:
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stack[0].obj = obj;
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++p;
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ret = 1;
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/*printf("-- finish --\n"); */
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goto _end;
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_failed:
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/*printf("** FAILED **\n"); */
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ret = -1;
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goto _end;
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_out:
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ret = 0;
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goto _end;
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_end:
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ctx->cs = cs;
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ctx->trail = trail;
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ctx->top = top;
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*off = p - (const unsigned char*)data;
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return ret;
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}
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#undef msgpack_unpack_func
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#undef msgpack_unpack_callback
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#undef msgpack_unpack_struct
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#undef msgpack_unpack_object
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#undef msgpack_unpack_user
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#undef push_simple_value
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#undef push_fixed_value
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#undef push_variable_value
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#undef again_fixed_trail
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#undef again_fixed_trail_if_zero
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#undef start_container
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#undef NEXT_CS
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#undef PTR_CAST_8
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#undef PTR_CAST_16
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#undef PTR_CAST_32
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#undef PTR_CAST_64
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