cjson.rar_LUA JSON_cjson_cjson.lua_lua_piledxg

/* Lua CJSON - JSON support for Lua * * Copyright (c) 2010-2012 Mark Pulford <mark@kyne.com.au> * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* Caveats: * - JSON "null" values are represented as lightuserdata since Lua * tables cannot contain "nil". Compare with cjson.null. * - Invalid UTF-8 characters are not detected and will be passed * untouched. If required, UTF-8 error checking should be done * outside this library. * - Javascript comments are not part of the JSON spec, and are not * currently supported. * * Note: Decoding is slower than encoding. Lua spends significant * time (30%) managing tables when parsing JSON since it is * difficult to know object/array sizes ahead of time. */ #include <assert.h> #include <string.h> #include <math.h> #include <limits.h> #include <lua.h> #include <lauxlib.h> #include "strbuf.h" #include "fpconv.h" #ifndef CJSON_MODNAME #define CJSON_MODNAME "cjson" #endif #ifndef CJSON_VERSION #define CJSON_VERSION "2.1.0" #endif /* Workaround for Solaris platforms missing isinf() */ #if !defined(isinf) && (defined(USE_INTERNAL_ISINF) || defined(MISSING_ISINF)) #define isinf(x) (!isnan(x) && isnan((x) - (x))) #endif #define DEFAULT_SPARSE_CONVERT 0 #define DEFAULT_SPARSE_RATIO 2 #define DEFAULT_SPARSE_SAFE 10 #define DEFAULT_ENCODE_MAX_DEPTH 1000 #define DEFAULT_DECODE_MAX_DEPTH 1000 #define DEFAULT_ENCODE_INVALID_NUMBERS 0 #define DEFAULT_DECODE_INVALID_NUMBERS 1 #define DEFAULT_ENCODE_KEEP_BUFFER 1 #define DEFAULT_ENCODE_NUMBER_PRECISION 14 #ifdef DISABLE_INVALID_NUMBERS #undef DEFAULT_DECODE_INVALID_NUMBERS #define DEFAULT_DECODE_INVALID_NUMBERS 0 #endif typedef enum { T_OBJ_BEGIN, T_OBJ_END, T_ARR_BEGIN, T_ARR_END, T_STRING, T_NUMBER, T_BOOLEAN, T_NULL, T_COLON, T_COMMA, T_END, T_WHITESPACE, T_ERROR, T_UNKNOWN } json_token_type_t; static const char *json_token_type_name[] = { "T_OBJ_BEGIN", "T_OBJ_END", "T_ARR_BEGIN", "T_ARR_END", "T_STRING", "T_NUMBER", "T_BOOLEAN", "T_NULL", "T_COLON", "T_COMMA", "T_END", "T_WHITESPACE", "T_ERROR", "T_UNKNOWN", NULL }; typedef struct { json_token_type_t ch2token[256]; char escape2char[256]; /* Decoding */ /* encode_buf is only allocated and used when * encode_keep_buffer is set */ strbuf_t encode_buf; int encode_sparse_convert; int encode_sparse_ratio; int encode_sparse_safe; int encode_max_depth; int encode_invalid_numbers; /* 2 => Encode as "null" */ int encode_number_precision; int encode_keep_buffer; int decode_invalid_numbers; int decode_max_depth; } json_config_t; typedef struct { const char *data; const char *ptr; strbuf_t *tmp; /* Temporary storage for strings */ json_config_t *cfg; int current_depth; } json_parse_t; typedef struct { json_token_type_t type; int index; union { const char *string; double number; int boolean; } value; int string_len; } json_token_t; static const char *char2escape[256] = { "\\u0000", "\\u0001", "\\u0002", "\\u0003", "\\u0004", "\\u0005", "\\u0006", "\\u0007", "\\b", "\\t", "\\n", "\\u000b", "\\f", "\\r", "\\u000e", "\\u000f", "\\u0010", "\\u0011", "\\u0012", "\\u0013", "\\u0014", "\\u0015", "\\u0016", "\\u0017", "\\u0018", "\\u0019", "\\u001a", "\\u001b", "\\u001c", "\\u001d", "\\u001e", "\\u001f", NULL, NULL, "\\\"", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "\\/", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "\\\\", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "\\u007f", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, }; /* ===== CONFIGURATION ===== */ static json_config_t *json_fetch_config(lua_State *l) { json_config_t *cfg; cfg = lua_touserdata(l, lua_upvalueindex(1)); if (!cfg) luaL_error(l, "BUG: Unable to fetch CJSON configuration"); return cfg; } /* Ensure the correct number of arguments have been provided. * Pad with nil to allow other functions to simply check arg[i] * to find whether an argument was provided */ static json_config_t *json_arg_init(lua_State *l, int args) { luaL_argcheck(l, lua_gettop(l) <= args, args + 1, "found too many arguments"); while (lua_gettop(l) < args) lua_pushnil(l); return json_fetch_config(l); } /* Process integer options for configuration functions */ static int json_integer_option(lua_State *l, int optindex, int *setting, int min, int max) { char errmsg[64]; int value; if (!lua_isnil(l, optindex)) { value = (int)luaL_checkinteger(l, optindex); snprintf(errmsg, sizeof(errmsg), "expected integer between %d and %d", min, max); luaL_argcheck(l, min <= value && value <= max, 1, errmsg); *setting = value; } lua_pushinteger(l, *setting); return 1; } /* Process enumerated arguments for a configuration function */ static int json_enum_option(lua_State *l, int optindex, int *setting, const char **options, int bool_true) { static const char *bool_options[] = { "off", "on", NULL }; if (!options) { options = bool_options; bool_true = 1; } if (!lua_isnil(l, optindex)) { if (bool_true && lua_isboolean(l, optindex)) *setting = lua_toboolean(l, optindex) * bool_true;