681 lines
16 KiB
C
681 lines
16 KiB
C
/*
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Copyright (c) 2009 Dave Gamble
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Copyright (c) 2009 The OpenTyrian Development Team
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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// cJSON
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// JSON parser in C.
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#include "cJSON.h"
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#include "mingw_fixes.h"
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#include <assert.h>
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#include <ctype.h>
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#include <float.h>
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#include <limits.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static void *(*cJSON_malloc)( size_t ) = malloc;
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static void *(*cJSON_realloc)( void *, size_t ) = realloc;
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static void (*cJSON_free)( void *ptr ) = free;
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// helper for compilers without strdup
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static char *cJSON_strdup( const char *str )
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{
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size_t size = strlen(str) + 1;
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char *copy = (char *)cJSON_malloc(size);
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if (copy != NULL)
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memcpy(copy, str, size);
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return copy;
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}
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// helper for compilers without strcasecmp
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static int cJSON_strcasecmp( const char *s1, const char *s2 )
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{
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for(; tolower(*(const unsigned char *)s1) == tolower(*(const unsigned char *)s2); ++s1, ++s2)
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if (*s1 == 0)
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return 0;
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return tolower(*(const unsigned char *)s1) - tolower(*(const unsigned char *)s2);
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}
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// construct empty item
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static cJSON *cJSON_NewItem( cJSON_Type type )
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{
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cJSON *node = (cJSON *)cJSON_malloc(sizeof(cJSON));
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if (node != NULL)
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{
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node->type = type;
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node->child =
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node->prev =
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node->next = NULL;
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node->string = NULL;
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node->valuestring = NULL;
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node->valueint =
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node->valuedouble = 0;
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}
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return node;
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}
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// destroy item chain
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void cJSON_Delete( cJSON *item )
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{
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while (item != NULL)
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{
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if (item->child)
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cJSON_Delete(item->child);
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cJSON *next = item->next;
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if (item->string)
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cJSON_free(item->string);
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if (item->valuestring)
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cJSON_free(item->valuestring);
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cJSON_free(item);
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item = next;
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}
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}
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// parser/emitter prototypes
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static const char *parse_value( cJSON *item, const char *in );
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static char *print_value(cJSON *item,int depth);
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static const char *parse_number( cJSON *item, const char *in );
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static char *print_number( cJSON *item );
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static const char *parse_string(cJSON *item,const char *str);
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static char *print_string(cJSON *item);
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static const char *parse_array_or_object( cJSON *item, const char *in, cJSON_Type type );
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static char *print_array(cJSON *item,int depth);
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static char *print_object(cJSON *item,int depth);
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static inline const char *parse_array( cJSON *item, const char *in )
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{
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return parse_array_or_object(item, in, cJSON_Array);
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}
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static inline const char *parse_object( cJSON *item, const char *in )
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{
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return parse_array_or_object(item, in, cJSON_Object);
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}
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// helper to skip whitespace
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static inline const char *skip_space( const char *str )
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{
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if (str != NULL)
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while (isspace(*str))
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++str;
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return str;
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}
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// parse root of JSON into cJSON item
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cJSON *cJSON_Parse( const char *in )
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{
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cJSON *item = cJSON_NewItem(cJSON_NULL);
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if (item != NULL)
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{
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if (parse_value(item, skip_space(in)) == NULL) // if malformed or out-of-memory
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{
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cJSON_Delete(item);
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item = NULL;
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}
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}
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return item;
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}
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// emit cJSON item as JSON value
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char *cJSON_Print( cJSON *item )
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{
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return print_value(item, 0);
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}
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// parse JSON value into cJSON item
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static const char *parse_value( cJSON *item, const char *in )
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{
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if (in == NULL)
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return in;
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if (!strncmp(in, "null", 4))
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{
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item->type = cJSON_NULL;
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return in + 4;
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}
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if (!strncmp(in, "false", 5))
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{
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item->type = cJSON_False;
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return in + 5;
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}
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if (!strncmp(in, "true", 4))
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{
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item->type = cJSON_True;
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return in + 4;
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}
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if (*in == '\"')
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return parse_string(item, in);
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if (*in == '-' || (*in >= '0' && *in <= '9'))
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return parse_number(item, in);
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if (*in == '[')
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return parse_array(item, in);
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if (*in == '{')
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return parse_object(item, in);
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return NULL; // malformed: expected value
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}
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// emit cJSON item as JSON value
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static char *print_value( cJSON *item, int depth )
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{
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char *out = NULL;
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switch (item->type)
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{
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case cJSON_NULL:
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out = cJSON_strdup("null");
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break;
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case cJSON_False:
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out = cJSON_strdup("false");
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break;
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case cJSON_True:
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out = cJSON_strdup("true");
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break;
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case cJSON_Number:
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out = print_number(item);
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break;
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case cJSON_String:
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out = print_string(item);
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break;
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case cJSON_Array:
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out = print_array(item, depth);
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break;
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case cJSON_Object:
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out = print_object(item, depth);
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break;
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}
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return out;
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}
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// parse JSON number value into cJSON item
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static const char *parse_number( cJSON *item, const char *in )
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{
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double n = 0;
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int sign = 1, decimal_shift = 0;
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int exponent_sign = 1, exponent = 0;
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if (*in == '-')
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sign = -1, ++in;
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// integer part
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if (*in == '0')
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++in;
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else if (*in >= '1' && *in <= '9')
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do
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n = (n * 10.0) + (*(in++) - '0');
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while (*in >= '0' && *in <= '9');
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// fractional part
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if (*in == '.')
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{
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++in;
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while (*in >= '0' && *in <= '9')
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n = (n * 10.0) + (*(in++) - '0'), decimal_shift--;
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}
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// exponent part
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if (*in == 'e' || *in == 'E')
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{
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++in;
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if (*in == '+')
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++in;
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else if (*in == '-')
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exponent_sign = -1, ++in;
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while (*in >= '0' && *in <= '9')
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exponent = (exponent * 10) + (*(in++) - '0');
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}
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// number = +/- number.fraction * (10 ^ +/- exponent)
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n = sign * n * pow(10.0, decimal_shift + exponent_sign * exponent);
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item->valuedouble = n;
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item->valueint = n;
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item->type = cJSON_Number;
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return in;
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}
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// emit string containing numeric value of cJSON item
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static char *print_number( cJSON *item )
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{
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char *str = (char *)cJSON_malloc(DBL_DIG + 10);
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snprintf(str, DBL_DIG + 10, "%.*g", DBL_DIG, item->valuedouble);
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return str;
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}
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// Parse the input text into an unescaped cstring, and populate item.
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static const unsigned char firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
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static const char *parse_string(cJSON *item,const char *str)
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{
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const char *ptr=str+1;char *ptr2;char *out;int len=0;unsigned uc;
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if (*str!='\"') return 0; // not a string!
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while (*ptr!='\"' && *ptr>31 && ++len) if (*ptr++ == '\\') ptr++; // skip escaped quotes.
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out=(char*)cJSON_malloc(len+1); // This is how long we need for the string, roughly.
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if (!out) return 0;
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ptr=str+1;ptr2=out;
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while (*ptr!='\"' && *ptr>31)
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{
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if (*ptr!='\\') *ptr2++=*ptr++;
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else
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{
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ptr++;
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switch (*ptr)
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{
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case 'b': *ptr2++='\b'; break;
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case 'f': *ptr2++='\f'; break;
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case 'n': *ptr2++='\n'; break;
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case 'r': *ptr2++='\r'; break;
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case 't': *ptr2++='\t'; break;
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case 'u': // transcode utf16 to utf8. DOES NOT SUPPORT SURROGATE PAIRS CORRECTLY.
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sscanf(ptr+1,"%4x",&uc); // get the unicode char.
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len=3;if (uc<0x80) len=1;else if (uc<0x800) len=2;ptr2+=len;
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switch (len) {
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case 3: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
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case 2: *--ptr2 =((uc | 0x80) & 0xBF); uc >>= 6;
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case 1: *--ptr2 =(uc | firstByteMark[len]);
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}
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ptr2+=len;ptr+=4;
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break;
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default: *ptr2++=*ptr; break;
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}
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ptr++;
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}
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}
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*ptr2=0;
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if (*ptr=='\"') ptr++;
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item->valuestring=out;
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item->type=cJSON_String;
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return ptr;
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}
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// Render the cstring provided to an escaped version that can be printed.
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static char *print_string_ptr(const char *str)
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{
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const char *ptr;char *ptr2,*out;int len=0;
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ptr=str;while (*ptr && ++len) {if (*ptr<32 || *ptr=='\"' || *ptr=='\\') len++;ptr++;}
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out=(char*)cJSON_malloc(len+3);
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ptr2=out;ptr=str;
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*ptr2++='\"';
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while (*ptr)
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{
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if (*ptr>31 && *ptr!='\"' && *ptr!='\\') *ptr2++=*ptr++;
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else
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{
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*ptr2++='\\';
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switch (*ptr++)
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{
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case '\\': *ptr2++='\\'; break;
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case '\"': *ptr2++='\"'; break;
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case '\b': *ptr2++='b'; break;
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case '\f': *ptr2++='f'; break;
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case '\n': *ptr2++='n'; break;
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case '\r': *ptr2++='r'; break;
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case '\t': *ptr2++='t'; break;
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default: ptr2--; break; // eviscerate with prejudice.
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}
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}
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}
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*ptr2++='\"';*ptr2++=0;
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return out;
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}
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// Invote print_string_ptr (which is useful) on an item.
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static char *print_string(cJSON *item)
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{
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return (item->valuestring != NULL) ? print_string_ptr(item->valuestring) : cJSON_strdup("");
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}
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// parse JSON array/object into cJSON item chain
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static const char *parse_array_or_object( cJSON *const item, const char *in, cJSON_Type type )
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{
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assert(type == cJSON_Array || type == cJSON_Object);
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const char opening = (type == cJSON_Object) ? '{' : '[',
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closing = (type == cJSON_Object) ? '}' : ']';
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if (*in != opening) // not an array/object!
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return NULL;
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else
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in = skip_space(++in);
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item->type = type;
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if (*in == closing) // empty array/object
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return ++in;
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cJSON *prev_child = NULL;
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for (; ; )
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{
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cJSON *child = cJSON_NewItem(cJSON_NULL);
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if (child == NULL) // memory fail
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return NULL;
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if (prev_child == NULL)
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{
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// attach first child to parent
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item->child = child;
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}
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else
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{
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// attach other children to older sibling
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prev_child->next = child;
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child->prev = prev_child;
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}
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if (type == cJSON_Object)
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{
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// object children have identifier string
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in = skip_space(parse_string(child, skip_space(in)));
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if (in == NULL) // malformed or memory fail
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return NULL;
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// parse_string parses into the item's value; we can use it to parse the identifier string, we just have to move the results
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child->string = child->valuestring;
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child->valuestring = NULL;
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if (*in != ':') // malformed
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return NULL;
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else
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++in;
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}
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in = skip_space(parse_value(child, skip_space(in)));
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if (in == NULL) // malformed or memory fail
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return NULL;
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prev_child = child;
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if (*in == ',')
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++in;
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else
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break;
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}
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if (*in == closing) // end of array/object
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return ++in;
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return NULL; // malformed
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}
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// Render an array to text
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static char *print_array(cJSON *item,int depth)
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{
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char *out, *ptr;
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size_t len = 3; // minimum needed to print empty array
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ptr = out = (char*)cJSON_malloc(len);
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strcpy(ptr, "[");
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ptr += 1;
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cJSON *child = item->child;
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while (child)
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{
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char *ret = print_value(child, depth + 1);
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if (!ret)
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{
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cJSON_free(out);
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return NULL;
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}
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size_t ret_len = strlen(ret);
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len += ret_len + 2;
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ptr = out = (char*)cJSON_realloc(out, len);
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ptr += strlen(out);
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strcpy(ptr, ret); // strcat(out, ret);
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ptr += ret_len;
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cJSON_free(ret);
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if (child->next)
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{
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strcpy(ptr, ", "); // strcat(out, ", ");
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ptr += 2;
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}
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child = child->next;
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}
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strcpy(ptr, "]"); // strcat(out, "]");
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return out;
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}
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// Render an object to text.
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static char *print_object(cJSON *item,int depth)
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{
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char *out, *ptr;
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size_t len = 4 + depth; // minimum needed to print empty object
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++depth;
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ptr = out = (char*)cJSON_malloc(len);
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strcpy(ptr, "{\n");
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ptr += 2;
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cJSON *child = item->child;
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while (child)
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{
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char *str = print_string_ptr(child->string);
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if (!str)
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{
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cJSON_free(out);
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return NULL;
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}
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size_t str_len = strlen(str);
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char *ret = print_value(child, depth);
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if (!ret)
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{
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cJSON_free(str);
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cJSON_free(out);
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return NULL;
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}
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size_t ret_len = strlen(ret);
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len += depth + str_len + ret_len + 4;
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out = (char*)cJSON_realloc(out, len);
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ptr = out + strlen(out);
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for (int i = 0; i < depth; ++i)
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*(ptr++) = '\t';
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strcpy(ptr, str); // strcat(out, str);
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ptr += str_len;
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cJSON_free(str);
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strcpy(ptr, ":\t"); // strcat(out, ":\t");
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ptr += 2;
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strcpy(ptr, ret); // strcat(out, ret);
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ptr += ret_len;
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cJSON_free(ret);
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if (child->next)
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{
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strcpy(ptr, ",\n"); // strcat(out, ",\n");
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ptr += 2;
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}
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else
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{
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strcpy(ptr, "\n"); // strcat(out, "\n");
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ptr += 1;
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}
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child = child->next;
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}
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--depth;
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for (int i = 0; i < depth; ++i)
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*(ptr++) = '\t';
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strcpy(ptr, "}"); // strcat(out, "}");
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return out;
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}
|
|
|
|
// Get Array size/item / object item.
|
|
int cJSON_GetArraySize( cJSON *array )
|
|
{
|
|
int size = 0;
|
|
cJSON *item = array->child;
|
|
while (item != NULL)
|
|
item = item->next, ++size;
|
|
return size;
|
|
}
|
|
cJSON *cJSON_GetArrayItem( cJSON *array, int index )
|
|
{
|
|
cJSON *item = array->child;
|
|
while (item != NULL && index > 0)
|
|
item = item->next, --index;
|
|
return item;
|
|
}
|
|
cJSON *cJSON_GetObjectItem( cJSON *object, const char *string)
|
|
{
|
|
cJSON *item=object->child;
|
|
while (item != NULL && cJSON_strcasecmp(item->string, string) != 0)
|
|
item = item->next;
|
|
return item;
|
|
}
|
|
|
|
cJSON *cJSON_CreateOrGetObjectItem( cJSON *object, const char *string )
|
|
{
|
|
cJSON *child = cJSON_GetObjectItem(object, string);
|
|
if (child == NULL)
|
|
cJSON_AddItemToObject(object, string, child = cJSON_CreateNull());
|
|
|
|
return child;
|
|
}
|
|
|
|
// Utility for array list handling.
|
|
static void suffix_object(cJSON *prev,cJSON *item) {prev->next=item;item->prev=prev;}
|
|
|
|
// Add item to array/object.
|
|
void cJSON_AddItemToArray(cJSON *array, cJSON *item) {cJSON *c=array->child;if (!c) {array->child=item;} else {while (c && c->next) c=c->next; suffix_object(c,item);}}
|
|
void cJSON_AddItemToObject(cJSON *object,const char *string,cJSON *item) {if (item->string) cJSON_free(item->string);item->string=cJSON_strdup(string);cJSON_AddItemToArray(object,item);}
|
|
|
|
// remove all items from array/object
|
|
void cJSON_ClearArray( cJSON *array )
|
|
{
|
|
cJSON_Delete(array->child);
|
|
array->child = NULL;
|
|
}
|
|
|
|
// create basic types
|
|
|
|
cJSON *cJSON_CreateNull( void )
|
|
{
|
|
return cJSON_NewItem(cJSON_NULL);
|
|
}
|
|
cJSON *cJSON_CreateBoolean( bool value )
|
|
{
|
|
return cJSON_NewItem(value ? cJSON_True : cJSON_False);
|
|
}
|
|
cJSON *cJSON_CreateNumber( double value )
|
|
{
|
|
cJSON *item = cJSON_NewItem(cJSON_Number);
|
|
item->valueint = item->valuedouble = value;
|
|
return item;
|
|
}
|
|
cJSON *cJSON_CreateString( const char *value )
|
|
{
|
|
cJSON *item = cJSON_NewItem(cJSON_String);
|
|
item->valuestring = cJSON_strdup(value);
|
|
return item;
|
|
}
|
|
cJSON *cJSON_CreateArray( void )
|
|
{
|
|
return cJSON_NewItem(cJSON_Array);
|
|
}
|
|
cJSON *cJSON_CreateObject( void )
|
|
{
|
|
return cJSON_NewItem(cJSON_Object);
|
|
}
|
|
|
|
void cJSON_ForceType( cJSON *item, cJSON_Type type )
|
|
{
|
|
if (item->type != type)
|
|
{
|
|
cJSON_Delete(item->child);
|
|
item->child = NULL;
|
|
|
|
item->type = type;
|
|
}
|
|
}
|
|
|
|
void cJSON_SetBoolean( cJSON *item, bool value )
|
|
{
|
|
cJSON_ForceType(item, value ? cJSON_True : cJSON_False);
|
|
}
|
|
void cJSON_SetNumber( cJSON *item, double value )
|
|
{
|
|
cJSON_ForceType(item, cJSON_Number);
|
|
item->valueint = item->valuedouble = value;
|
|
}
|
|
void cJSON_SetString( cJSON *item, const char *value )
|
|
{
|
|
cJSON_ForceType(item, cJSON_String);
|
|
cJSON_free(item->valuestring);
|
|
item->valuestring = cJSON_strdup(value);
|
|
}
|
|
|
|
// Create Arrays:
|
|
cJSON *cJSON_CreateIntArray(int *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
|
cJSON *cJSON_CreateFloatArray(float *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
|
cJSON *cJSON_CreateDoubleArray(double *numbers,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;i<count;i++){n=cJSON_CreateNumber(numbers[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|
|
cJSON *cJSON_CreateStringArray(const char **strings,int count) {int i;cJSON *n=0,*p=0,*a=cJSON_CreateArray();for(i=0;i<count;i++){n=cJSON_CreateString(strings[i]);if(!i)a->child=n;else suffix_object(p,n);p=n;}return a;}
|