1 /* 2 * Copyright (c) 2009-2014 Petri Lehtinen <petri@digip.org> 3 * 4 * Jansson is free software; you can redistribute it and/or modify 5 * it under the terms of the MIT license. See LICENSE for details. 6 */ 7 8 #ifndef JANSSON_PRIVATE_H 9 #define JANSSON_PRIVATE_H 10 11 #include <stddef.h> 12 #include "jansson.h" 13 #include "hashtable.h" 14 #include "strbuffer.h" 15 #include "plat_types.h" 16 #define container_of(ptr_, type_, member_) \ 17 ((type_ *)((char *)ptr_ - OFFSETOF(type_, member_))) 18 19 /* On some platforms, max() may already be defined */ 20 #ifndef max 21 #define max(a, b) ((a) > (b) ? (a) : (b)) 22 #endif 23 24 /* va_copy is a C99 feature. In C89 implementations, it's sometimes 25 available as __va_copy. If not, memcpy() should do the trick. */ 26 #ifndef va_copy 27 #ifdef __va_copy 28 #define va_copy __va_copy 29 #else 30 #define va_copy(a, b) memcpy(&(a), &(b), sizeof(va_list)) 31 #endif 32 #endif 33 34 typedef struct { 35 json_t json; 36 hashtable_t hashtable; 37 size_t serial; 38 int visited; 39 } json_object_t; 40 41 typedef struct { 42 json_t json; 43 size_t size; 44 size_t entries; 45 json_t **table; 46 int visited; 47 } json_array_t; 48 49 typedef struct { 50 json_t json; 51 char *value; 52 size_t length; 53 } json_string_t; 54 55 typedef struct { 56 json_t json; 57 double value; 58 } json_real_t; 59 60 typedef struct { 61 json_t json; 62 json_int_t value; 63 } json_integer_t; 64 65 #define json_to_object(json_) container_of(json_, json_object_t, json) 66 #define json_to_array(json_) container_of(json_, json_array_t, json) 67 #define json_to_string(json_) container_of(json_, json_string_t, json) 68 #define json_to_real(json_) container_of(json_, json_real_t, json) 69 #define json_to_integer(json_) container_of(json_, json_integer_t, json) 70 71 /* Create a string by taking ownership of an existing buffer */ 72 json_t *jsonp_stringn_nocheck_own(const char *value, size_t len); 73 74 /* Error message formatting */ 75 void jsonp_error_init(json_error_t *error, const char *source); 76 void jsonp_error_set_source(json_error_t *error, const char *source); 77 void jsonp_error_set(json_error_t *error, int line, int column, 78 size_t position, const char *msg, ...); 79 void jsonp_error_vset(json_error_t *error, int line, int column, 80 size_t position, const char *msg, va_list ap); 81 82 /* Locale independent string<->double conversions */ 83 int jsonp_strtod(strbuffer_t *strbuffer, double *out); 84 int jsonp_dtostr(char *buffer, size_t size, double value, int prec); 85 86 /* Wrappers for custom memory functions */ 87 void* jsonp_malloc(size_t size); 88 void jsonp_free(void *ptr); 89 char *jsonp_strndup(const char *str, size_t length); 90 char *jsonp_strdup(const char *str); 91 char *jsonp_strndup(const char *str, size_t len); 92 93 /* Windows compatibility */ 94 #ifdef _WIN32 95 #define snprintf _snprintf 96 #define vsnprintf _vsnprintf 97 #endif 98 99 #endif 100