| /* |
| * $Id: json_object.c,v 1.17 2006/07/25 03:24:50 mclark Exp $ |
| * |
| * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd. |
| * Michael Clark <michael@metaparadigm.com> |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the MIT license. See COPYING for details. |
| * |
| */ |
| |
| #include "config.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stddef.h> |
| #include <string.h> |
| |
| #include "debug.h" |
| #include "printbuf.h" |
| #include "linkhash.h" |
| #include "arraylist.h" |
| #include "json_inttypes.h" |
| #include "json_object.h" |
| #include "json_object_private.h" |
| #include "json_util.h" |
| |
| #if !HAVE_STRNDUP |
| char* strndup(const char* str, size_t n); |
| #endif /* !HAVE_STRNDUP */ |
| |
| /* #define REFCOUNT_DEBUG 1 */ |
| |
| const char *json_number_chars = "0123456789.+-eE"; |
| const char *json_hex_chars = "0123456789abcdef"; |
| |
| #ifdef REFCOUNT_DEBUG |
| static const char* json_type_name[] = { |
| "null", |
| "boolean", |
| "double", |
| "int", |
| "object", |
| "array", |
| "string", |
| }; |
| #endif /* REFCOUNT_DEBUG */ |
| |
| static void json_object_generic_delete(struct json_object* jso); |
| static struct json_object* json_object_new(enum json_type o_type); |
| |
| |
| /* ref count debugging */ |
| |
| #ifdef REFCOUNT_DEBUG |
| |
| static struct lh_table *json_object_table; |
| |
| static void json_object_init(void) __attribute__ ((constructor)); |
| static void json_object_init(void) { |
| MC_DEBUG("json_object_init: creating object table\n"); |
| json_object_table = lh_kptr_table_new(128, "json_object_table", NULL); |
| } |
| |
| static void json_object_fini(void) __attribute__ ((destructor)); |
| static void json_object_fini(void) { |
| struct lh_entry *ent; |
| if(MC_GET_DEBUG()) { |
| if (json_object_table->count) { |
| MC_DEBUG("json_object_fini: %d referenced objects at exit\n", |
| json_object_table->count); |
| lh_foreach(json_object_table, ent) { |
| struct json_object* obj = (struct json_object*)ent->v; |
| MC_DEBUG("\t%s:%p\n", json_type_name[obj->o_type], obj); |
| } |
| } |
| } |
| MC_DEBUG("json_object_fini: freeing object table\n"); |
| lh_table_free(json_object_table); |
| } |
| #endif /* REFCOUNT_DEBUG */ |
| |
| |
| /* string escaping */ |
| |
| static int json_escape_str(struct printbuf *pb, char *str) |
| { |
| int pos = 0, start_offset = 0; |
| unsigned char c; |
| do { |
| c = str[pos]; |
| switch(c) { |
| case '\0': |
| break; |
| case '\b': |
| case '\n': |
| case '\r': |
| case '\t': |
| case '"': |
| case '\\': |
| case '/': |
| if(pos - start_offset > 0) |
| printbuf_memappend(pb, str + start_offset, pos - start_offset); |
| if(c == '\b') printbuf_memappend(pb, "\\b", 2); |
| else if(c == '\n') printbuf_memappend(pb, "\\n", 2); |
| else if(c == '\r') printbuf_memappend(pb, "\\r", 2); |
| else if(c == '\t') printbuf_memappend(pb, "\\t", 2); |
| else if(c == '"') printbuf_memappend(pb, "\\\"", 2); |
| else if(c == '\\') printbuf_memappend(pb, "\\\\", 2); |
| else if(c == '/') printbuf_memappend(pb, "\\/", 2); |
| start_offset = ++pos; |
| break; |
| default: |
| if(c < ' ') { |
| if(pos - start_offset > 0) |
| printbuf_memappend(pb, str + start_offset, pos - start_offset); |
| sprintbuf(pb, "\\u00%c%c", |
| json_hex_chars[c >> 4], |
| json_hex_chars[c & 0xf]); |
| start_offset = ++pos; |
| } else pos++; |
| } |
| } while(c); |
| if(pos - start_offset > 0) |
| printbuf_memappend(pb, str + start_offset, pos - start_offset); |
| return 0; |
| } |
| |
| |
| /* reference counting */ |
| |
| extern struct json_object* json_object_get(struct json_object *jso) |
| { |
| if(jso) { |
| jso->_ref_count++; |
| } |
| return jso; |
| } |
| |
| extern void json_object_put(struct json_object *jso) |
| { |
| if(jso) { |
| jso->_ref_count--; |
| if(!jso->_ref_count) jso->_delete(jso); |
| } |
| } |
| |
| |
| /* generic object construction and destruction parts */ |
| |
| static void json_object_generic_delete(struct json_object* jso) |
| { |
| #ifdef REFCOUNT_DEBUG |
| MC_DEBUG("json_object_delete_%s: %p\n", |
| json_type_name[jso->o_type], jso); |
| lh_table_delete(json_object_table, jso); |
| #endif /* REFCOUNT_DEBUG */ |
| printbuf_free(jso->_pb); |
| free(jso); |
| } |
| |
| static struct json_object* json_object_new(enum json_type o_type) |
| { |
| struct json_object *jso; |
| |
| jso = (struct json_object*)calloc(sizeof(struct json_object), 1); |
| if(!jso) return NULL; |
| jso->o_type = o_type; |
| jso->_ref_count = 1; |
| jso->_delete = &json_object_generic_delete; |
| #ifdef REFCOUNT_DEBUG |
| lh_table_insert(json_object_table, jso, jso); |
| MC_DEBUG("json_object_new_%s: %p\n", json_type_name[jso->o_type], jso); |
| #endif /* REFCOUNT_DEBUG */ |
| return jso; |
| } |
| |
| |
| /* type checking functions */ |
| |
| int json_object_is_type(struct json_object *jso, enum json_type type) |
| { |
| return (jso->o_type == type); |
| } |
| |
| enum json_type json_object_get_type(struct json_object *jso) |
| { |
| return jso->o_type; |
| } |
| |
| |
| /* json_object_to_json_string */ |
| |
| const char* json_object_to_json_string(struct json_object *jso) |
| { |
| if(!jso) return "null"; |
| if(!jso->_pb) { |
| if(!(jso->_pb = printbuf_new())) return NULL; |
| } else { |
| printbuf_reset(jso->_pb); |
| } |
| if(jso->_to_json_string(jso, jso->_pb) < 0) return NULL; |
| return jso->_pb->buf; |
| } |
| |
| |
| /* json_object_object */ |
| |
| static int json_object_object_to_json_string(struct json_object* jso, |
| struct printbuf *pb) |
| { |
| int i=0; |
| struct json_object_iter iter; |
| sprintbuf(pb, "{"); |
| |
| /* CAW: scope operator to make ANSI correctness */ |
| /* CAW: switched to json_object_object_foreachC which uses an iterator struct */ |
| json_object_object_foreachC(jso, iter) { |
| if(i) sprintbuf(pb, ","); |
| sprintbuf(pb, " \""); |
| json_escape_str(pb, iter.key); |
| sprintbuf(pb, "\": "); |
| if(iter.val == NULL) sprintbuf(pb, "null"); |
| else iter.val->_to_json_string(iter.val, pb); |
| i++; |
| } |
| |
| return sprintbuf(pb, " }"); |
| } |
| |
| static void json_object_lh_entry_free(struct lh_entry *ent) |
| { |
| free(ent->k); |
| json_object_put((struct json_object*)ent->v); |
| } |
| |
| static void json_object_object_delete(struct json_object* jso) |
| { |
| lh_table_free(jso->o.c_object); |
| json_object_generic_delete(jso); |
| } |
| |
| struct json_object* json_object_new_object(void) |
| { |
| struct json_object *jso = json_object_new(json_type_object); |
| if(!jso) return NULL; |
| jso->_delete = &json_object_object_delete; |
| jso->_to_json_string = &json_object_object_to_json_string; |
| jso->o.c_object = lh_kchar_table_new(JSON_OBJECT_DEF_HASH_ENTRIES, |
| NULL, &json_object_lh_entry_free); |
| return jso; |
| } |
| |
| struct lh_table* json_object_get_object(struct json_object *jso) |
| { |
| if(!jso) return NULL; |
| switch(jso->o_type) { |
| case json_type_object: |
| return jso->o.c_object; |
| default: |
| return NULL; |
| } |
| } |
| |
| void json_object_object_add(struct json_object* jso, const char *key, |
| struct json_object *val) |
| { |
| lh_table_delete(jso->o.c_object, key); |
| lh_table_insert(jso->o.c_object, strdup(key), val); |
| } |
| |
| struct json_object* json_object_object_get(struct json_object* jso, const char *key) |
| { |
| return (struct json_object*) lh_table_lookup(jso->o.c_object, key); |
| } |
| |
| void json_object_object_del(struct json_object* jso, const char *key) |
| { |
| lh_table_delete(jso->o.c_object, key); |
| } |
| |
| |
| /* json_object_boolean */ |
| |
| static int json_object_boolean_to_json_string(struct json_object* jso, |
| struct printbuf *pb) |
| { |
| if(jso->o.c_boolean) return sprintbuf(pb, "true"); |
| else return sprintbuf(pb, "false"); |
| } |
| |
| struct json_object* json_object_new_boolean(boolean b) |
| { |
| struct json_object *jso = json_object_new(json_type_boolean); |
| if(!jso) return NULL; |
| jso->_to_json_string = &json_object_boolean_to_json_string; |
| jso->o.c_boolean = b; |
| return jso; |
| } |
| |
| boolean json_object_get_boolean(struct json_object *jso) |
| { |
| if(!jso) return FALSE; |
| switch(jso->o_type) { |
| case json_type_boolean: |
| return jso->o.c_boolean; |
| case json_type_int: |
| return (jso->o.c_int64 != 0); |
| case json_type_double: |
| return (jso->o.c_double != 0); |
| case json_type_string: |
| return (strlen(jso->o.c_string) != 0); |
| default: |
| return FALSE; |
| } |
| } |
| |
| |
| /* json_object_int */ |
| |
| static int json_object_int_to_json_string(struct json_object* jso, |
| struct printbuf *pb) |
| { |
| return sprintbuf(pb, "%"PRId64, jso->o.c_int64); |
| } |
| |
| struct json_object* json_object_new_int(int32_t i) |
| { |
| struct json_object *jso = json_object_new(json_type_int); |
| if(!jso) return NULL; |
| jso->_to_json_string = &json_object_int_to_json_string; |
| jso->o.c_int64 = i; |
| return jso; |
| } |
| |
| int32_t json_object_get_int(struct json_object *jso) |
| { |
| if(!jso) return 0; |
| |
| enum json_type o_type = jso->o_type; |
| int64_t cint64 = jso->o.c_int64; |
| |
| if (o_type == json_type_string) |
| { |
| /* |
| * Parse strings into 64-bit numbers, then use the |
| * 64-to-32-bit number handling below. |
| */ |
| if (json_parse_int64(jso->o.c_string, &cint64) != 0) |
| return 0; /* whoops, it didn't work. */ |
| o_type = json_type_int; |
| } |
| |
| switch(jso->o_type) { |
| case json_type_int: |
| /* Make sure we return the correct values for out of range numbers. */ |
| if (cint64 <= INT32_MIN) |
| return INT32_MIN; |
| else if (cint64 >= INT32_MAX) |
| return INT32_MAX; |
| else |
| return (int32_t)cint64; |
| case json_type_double: |
| return (int32_t)jso->o.c_double; |
| case json_type_boolean: |
| return jso->o.c_boolean; |
| default: |
| return 0; |
| } |
| } |
| |
| struct json_object* json_object_new_int64(int64_t i) |
| { |
| struct json_object *jso = json_object_new(json_type_int); |
| if(!jso) return NULL; |
| jso->_to_json_string = &json_object_int_to_json_string; |
| jso->o.c_int64 = i; |
| return jso; |
| } |
| |
| int64_t json_object_get_int64(struct json_object *jso) |
| { |
| int64_t cint; |
| |
| if(!jso) return 0; |
| switch(jso->o_type) { |
| case json_type_int: |
| return jso->o.c_int64; |
| case json_type_double: |
| return (int64_t)jso->o.c_double; |
| case json_type_boolean: |
| return jso->o.c_boolean; |
| case json_type_string: |
| if (json_parse_int64(jso->o.c_string, &cint) == 0) return cint; |
| default: |
| return 0; |
| } |
| } |
| |
| |
| /* json_object_double */ |
| |
| static int json_object_double_to_json_string(struct json_object* jso, |
| struct printbuf *pb) |
| { |
| return sprintbuf(pb, "%lf", jso->o.c_double); |
| } |
| |
| struct json_object* json_object_new_double(double d) |
| { |
| struct json_object *jso = json_object_new(json_type_double); |
| if(!jso) return NULL; |
| jso->_to_json_string = &json_object_double_to_json_string; |
| jso->o.c_double = d; |
| return jso; |
| } |
| |
| double json_object_get_double(struct json_object *jso) |
| { |
| double cdouble; |
| |
| if(!jso) return 0.0; |
| switch(jso->o_type) { |
| case json_type_double: |
| return jso->o.c_double; |
| case json_type_int: |
| return jso->o.c_int64; |
| case json_type_boolean: |
| return jso->o.c_boolean; |
| case json_type_string: |
| if(sscanf(jso->o.c_string, "%lf", &cdouble) == 1) return cdouble; |
| default: |
| return 0.0; |
| } |
| } |
| |
| |
| /* json_object_string */ |
| |
| static int json_object_string_to_json_string(struct json_object* jso, |
| struct printbuf *pb) |
| { |
| sprintbuf(pb, "\""); |
| json_escape_str(pb, jso->o.c_string); |
| sprintbuf(pb, "\""); |
| return 0; |
| } |
| |
| static void json_object_string_delete(struct json_object* jso) |
| { |
| free(jso->o.c_string); |
| json_object_generic_delete(jso); |
| } |
| |
| struct json_object* json_object_new_string(const char *s) |
| { |
| struct json_object *jso = json_object_new(json_type_string); |
| if(!jso) return NULL; |
| jso->_delete = &json_object_string_delete; |
| jso->_to_json_string = &json_object_string_to_json_string; |
| jso->o.c_string = strdup(s); |
| return jso; |
| } |
| |
| struct json_object* json_object_new_string_len(const char *s, int len) |
| { |
| struct json_object *jso = json_object_new(json_type_string); |
| if(!jso) return NULL; |
| jso->_delete = &json_object_string_delete; |
| jso->_to_json_string = &json_object_string_to_json_string; |
| jso->o.c_string = strndup(s, len); |
| return jso; |
| } |
| |
| const char* json_object_get_string(struct json_object *jso) |
| { |
| if(!jso) return NULL; |
| switch(jso->o_type) { |
| case json_type_string: |
| return jso->o.c_string; |
| default: |
| return json_object_to_json_string(jso); |
| } |
| } |
| |
| |
| /* json_object_array */ |
| |
| static int json_object_array_to_json_string(struct json_object* jso, |
| struct printbuf *pb) |
| { |
| int i; |
| sprintbuf(pb, "["); |
| for(i=0; i < json_object_array_length(jso); i++) { |
| struct json_object *val; |
| if(i) { sprintbuf(pb, ", "); } |
| else { sprintbuf(pb, " "); } |
| |
| val = json_object_array_get_idx(jso, i); |
| if(val == NULL) { sprintbuf(pb, "null"); } |
| else { val->_to_json_string(val, pb); } |
| } |
| return sprintbuf(pb, " ]"); |
| } |
| |
| static void json_object_array_entry_free(void *data) |
| { |
| json_object_put((struct json_object*)data); |
| } |
| |
| static void json_object_array_delete(struct json_object* jso) |
| { |
| array_list_free(jso->o.c_array); |
| json_object_generic_delete(jso); |
| } |
| |
| struct json_object* json_object_new_array(void) |
| { |
| struct json_object *jso = json_object_new(json_type_array); |
| if(!jso) return NULL; |
| jso->_delete = &json_object_array_delete; |
| jso->_to_json_string = &json_object_array_to_json_string; |
| jso->o.c_array = array_list_new(&json_object_array_entry_free); |
| return jso; |
| } |
| |
| struct array_list* json_object_get_array(struct json_object *jso) |
| { |
| if(!jso) return NULL; |
| switch(jso->o_type) { |
| case json_type_array: |
| return jso->o.c_array; |
| default: |
| return NULL; |
| } |
| } |
| |
| int json_object_array_length(struct json_object *jso) |
| { |
| return array_list_length(jso->o.c_array); |
| } |
| |
| int json_object_array_add(struct json_object *jso,struct json_object *val) |
| { |
| return array_list_add(jso->o.c_array, val); |
| } |
| |
| int json_object_array_put_idx(struct json_object *jso, int idx, |
| struct json_object *val) |
| { |
| return array_list_put_idx(jso->o.c_array, idx, val); |
| } |
| |
| struct json_object* json_object_array_get_idx(struct json_object *jso, |
| int idx) |
| { |
| return (struct json_object*)array_list_get_idx(jso->o.c_array, idx); |
| } |
| |