187 lines
10 KiB
C
187 lines
10 KiB
C
/*
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Copyright (c) 2009 Dave Gamble
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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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#ifndef baidu_json__h
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#define baidu_json__h
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#include "stdlib.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/* baidu_json Types: */
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#define baidu_json_False (1 << 0)
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#define baidu_json_True (1 << 1)
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#define baidu_json_NULL (1 << 2)
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#define baidu_json_Number (1 << 3)
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#define baidu_json_String (1 << 4)
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#define baidu_json_Array (1 << 5)
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#define baidu_json_Object (1 << 6)
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#define baidu_json_IsReference 256
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#define baidu_json_StringIsConst 512
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#define baidu_json_IsRoot 1024
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#define JSON_PREBUFF_SIZE_128 128
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#define JSON_PREBUFF_SIZE_256 256
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#define JSON_PREBUFF_SIZE_512 512
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#define JSON_PREBUFF_SIZE_1024 1024
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#define JSON_PREBUFF_SIZE_2048 2048
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/* The baidu_json structure: */
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typedef struct baidu_json {
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/* next/prev allow you to walk array/object chains. Alternatively, use GetArraySize/GetArrayItem/GetObjectItem */
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struct baidu_json *next;
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struct baidu_json *prev;
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/* An array or object item will have a child pointer pointing to a chain of the items in the array/object. */
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struct baidu_json *child;
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/* The type of the item, as above. */
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int type;
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/* The item's string, if type==baidu_json_String */
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char *valuestring;
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/* The item's number, if type==baidu_json_Number */
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int valueint;
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/* The item's number, if type==baidu_json_Number */
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double valuedouble;
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/* The item's name string, if this item is the child of, or is in the list of subitems of an object. */
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char *string;
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} baidu_json;
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typedef struct baidu_json_Hooks {
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void *(*malloc_fn)(size_t sz);
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void (*free_fn)(void *ptr);
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} baidu_json_Hooks;
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/* Supply malloc, realloc and free functions to baidu_json */
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extern void baidu_json_InitHooks(baidu_json_Hooks *hooks);
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extern int baidu_json_Uninit(void);
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/* Supply a block of JSON, and this returns a baidu_json object you can interrogate. Call baidu_json_Delete when finished. */
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extern baidu_json *baidu_json_Parse(const char *value);
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/* Render a baidu_json entity to text for transfer/storage. Free the char* when finished. */
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extern char *baidu_json_Print(const baidu_json *item);
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/* Render a baidu_json entity to text for transfer/storage without any formatting. Free the char* when finished. */
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extern char *baidu_json_PrintUnformatted(const baidu_json *item);
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/* Render a baidu_json entity to text using a buffered strategy. prebuffer is a guess at the final size. guessing well reduces reallocation. fmt=0 gives unformatted, =1 gives formatted */
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extern char *baidu_json_PrintBuffered(const baidu_json *item, int prebuffer, int fmt);
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/* Delete a baidu_json entity and all subentities. */
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extern void baidu_json_Delete(baidu_json *c);
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/* Returns the number of items in an array (or object). */
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extern int baidu_json_GetArraySize(const baidu_json *array);
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/* Retrieve item number "item" from array "array". Returns NULL if unsuccessful. */
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extern baidu_json *baidu_json_GetArrayItem(const baidu_json *array, int item);
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/* Get item "string" from object. Case insensitive. */
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extern baidu_json *baidu_json_GetObjectItem(const baidu_json *object, const char *string);
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extern int baidu_json_HasObjectItem(const baidu_json *object, const char *string);
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/* For analysing failed parses. This returns a pointer to the parse error. You'll probably need to look a few chars back to make sense of it. Defined when baidu_json_Parse() returns 0. 0 when baidu_json_Parse() succeeds. */
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extern const char *baidu_json_GetErrorPtr(void);
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/* These calls create a baidu_json item of the appropriate type. */
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extern baidu_json *baidu_json_CreateNull(void);
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extern baidu_json *baidu_json_CreateTrue(void);
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extern baidu_json *baidu_json_CreateFalse(void);
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extern baidu_json *baidu_json_CreateBool(int b);
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extern baidu_json *baidu_json_CreateNumber(double num);
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// len indicate the length of string, if len <=0, the length will be got throuth strlen(string)
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extern baidu_json *baidu_json_CreateString(const char *string, size_t len);
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extern baidu_json *baidu_json_CreateArray(void);
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extern baidu_json *baidu_json_CreateObject(void);
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/* These utilities create an Array of count items. */
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extern baidu_json *baidu_json_CreateIntArray(const int *numbers, int count);
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extern baidu_json *baidu_json_CreateFloatArray(const float *numbers, int count);
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extern baidu_json *baidu_json_CreateDoubleArray(const double *numbers, int count);
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extern baidu_json *baidu_json_CreateStringArray(const char **strings, int count);
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/* Append item to the specified array/object. */
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extern void baidu_json_AddItemToArray(baidu_json *array, baidu_json *item);
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extern void baidu_json_AddItemToObject(baidu_json *object, const char *string, baidu_json *item);
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extern void baidu_json_AddItemToObjectCS(baidu_json *object, const char *string, baidu_json *item); /* Use this when string is definitely const (i.e. a literal, or as good as), and will definitely survive the baidu_json object */
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/* Append reference to item to the specified array/object. Use this when you want to add an existing baidu_json to a new baidu_json, but don't want to corrupt your existing baidu_json. */
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extern void baidu_json_AddItemReferenceToArray(baidu_json *array, baidu_json *item);
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extern void baidu_json_AddItemReferenceToObject(baidu_json *object, const char *string, baidu_json *item);
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/* Remove/Detatch items from Arrays/Objects. */
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extern baidu_json *baidu_json_DetachItemFromArray(baidu_json *array, int which);
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extern void baidu_json_DeleteItemFromArray(baidu_json *array, int which);
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extern baidu_json *baidu_json_DetachItemFromObject(baidu_json *object, const char *string);
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extern void baidu_json_DeleteItemFromObject(baidu_json *object, const char *string);
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/* Update array items. */
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extern void baidu_json_InsertItemInArray(baidu_json *array, int which, baidu_json *newitem); /* Shifts pre-existing items to the right. */
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extern void baidu_json_ReplaceItemInArray(baidu_json *array, int which, baidu_json *newitem);
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extern void baidu_json_ReplaceItemInObject(baidu_json *object, const char *string, baidu_json *newitem);
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/* Duplicate a baidu_json item */
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extern baidu_json *baidu_json_Duplicate(const baidu_json *item, int recurse);
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/* Duplicate will create a new, identical baidu_json item to the one you pass, in new memory that will
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need to be released. With recurse!=0, it will duplicate any children connected to the item.
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The item->next and ->prev pointers are always zero on return from Duplicate. */
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/* ParseWithOpts allows you to require (and check) that the JSON is null terminated, and to retrieve the pointer to the final byte parsed. */
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/* If you supply a ptr in return_parse_end and parsing fails, then return_parse_end will contain a pointer to the error. If not, then baidu_json_GetErrorPtr() does the job. */
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extern baidu_json *baidu_json_ParseWithOpts(const char *value, const char **return_parse_end, int require_null_terminated);
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extern void baidu_json_Minify(char *json);
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extern void baidu_json_release(void *ptr);
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/* dump all json objects alloc from prealloc memory, detail = 0 just print count, = 1 print all items */
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extern int baidu_json_dump_prealloc_items(int detail);
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/* Macros for creating things quickly. */
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#define baidu_json_AddNullToObject(object,name) baidu_json_AddItemToObject(object, name, baidu_json_CreateNull())
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#define baidu_json_AddTrueToObject(object,name) baidu_json_AddItemToObject(object, name, baidu_json_CreateTrue())
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#define baidu_json_AddFalseToObject(object,name) baidu_json_AddItemToObject(object, name, baidu_json_CreateFalse())
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#define baidu_json_AddBoolToObject(object,name,b) baidu_json_AddItemToObject(object, name, baidu_json_CreateBool(b))
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#define baidu_json_AddNumberToObject(object,name,n) baidu_json_AddItemToObject(object, name, baidu_json_CreateNumber(n))
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#define baidu_json_AddStringToObject(object,name,s) baidu_json_AddItemToObject(object, name, baidu_json_CreateString(s, 0))
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#define baidu_json_AddStringToObjectWithLength(object,name,s,len) baidu_json_AddItemToObject(object, name, baidu_json_CreateString(s, len))
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/* Use this when string is definitely const (i.e. a literal, or as good as), and will definitely survive the baidu_json object */
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#define baidu_json_AddNullToObjectCS(object,name) baidu_json_AddItemToObjectCS(object, name, baidu_json_CreateNull())
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#define baidu_json_AddTrueToObjectCS(object,name) baidu_json_AddItemToObjectCS(object, name, baidu_json_CreateTrue())
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#define baidu_json_AddFalseToObjectCS(object,name) baidu_json_AddItemToObjectCS(object, name, baidu_json_CreateFalse())
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#define baidu_json_AddBoolToObjectCS(object,name,b) baidu_json_AddItemToObjectCS(object, name, baidu_json_CreateBool(b))
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#define baidu_json_AddNumberToObjectCS(object,name,n) baidu_json_AddItemToObjectCS(object, name, baidu_json_CreateNumber(n))
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#define baidu_json_AddStringToObjectCS(object,name,s) baidu_json_AddItemToObjectCS(object, name, baidu_json_CreateString(s, 0))
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#define baidu_json_AddStringToObjectCSWithLength(object,name,s,len) baidu_json_AddItemToObjectCS(object, name, baidu_json_CreateString(s, len))
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/* When assigning an integer value, it needs to be propagated to valuedouble too. */
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#define baidu_json_SetIntValue(object,val) ((object) ? (object)->valueint = (object)->valuedouble = (val) : (val))
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#define baidu_json_SetNumberValue(object,val) ((object) ? (object)->valueint = (object)->valuedouble = (val) : (val))
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/* Macro for iterating over an array */
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#define baidu_json_ArrayForEach(pos, head) for(pos = (head)->child; pos != NULL; pos = pos->next)
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#ifdef __cplusplus
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}
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#endif
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#endif
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