+/*
+ * Copyright (c) 2009 Petri Lehtinen <petri@digip.org>
+ *
+ * Jansson is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See LICENSE for details.
+ */
+
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
#include <jansson.h>
+#include "jansson_private.h"
#include "strbuffer.h"
+#define MAX_INTEGER_STR_LENGTH 100
+#define MAX_REAL_STR_LENGTH 100
+
typedef int (*dump_func)(const char *buffer, int size, void *data);
struct string
return 0;
}
-static int dump_to_fd(const char *buffer, int size, void *data)
-{
- int *fd = (int *)data;
- if(write(*fd, buffer, size) != size)
- return -1;
- return 0;
-}
+/* 256 spaces (the maximum indentation size) */
+static char whitespace[] = " ";
-static int dump_indent(uint32_t flags, int depth, dump_func dump, void *data)
+static int dump_indent(unsigned long flags, int depth, dump_func dump, void *data)
{
if(JSON_INDENT(flags) > 0)
{
- char *ws_buffer;
- int ws_count = JSON_INDENT(flags) * depth;
+ int i, ws_count = JSON_INDENT(flags);
if(dump("\n", 1, data))
return -1;
- if(ws_count == 0)
- return 0;
-
- ws_buffer = alloca(ws_count);
- memset(ws_buffer, ' ', ws_count);
- return dump(ws_buffer, ws_count, data);
+ for(i = 0; i < depth; i++)
+ {
+ if(dump(whitespace, ws_count, data))
+ return -1;
+ }
}
- else
- return dump(" ", 1, data);
+ return 0;
}
static int dump_string(const char *str, dump_func dump, void *data)
return -1;
end = str;
- while(*end)
+ while(1)
{
- while(*end && *end != '\\' && *end != '"')
+ const char *text;
+ char seq[7];
+ int length;
+
+ while(*end && *end != '\\' && *end != '"' && (unsigned char)*end > 0x1F)
end++;
- if(end != str)
+ if(end != str) {
if(dump(str, end - str, data))
return -1;
-
- if(*end == '\\')
- {
- if(dump("\\\\", 2, data))
- return -1;
- end++;
}
- else if(*end == '"')
+
+ if(!*end)
+ break;
+
+ /* handle \, ", and control codes */
+ length = 2;
+ switch(*end)
{
- if(dump("\\\"", 2, data))
- return -1;
- end++;
+ case '\\': text = "\\\\"; break;
+ case '\"': text = "\\\""; break;
+ case '\b': text = "\\b"; break;
+ case '\f': text = "\\f"; break;
+ case '\n': text = "\\n"; break;
+ case '\r': text = "\\r"; break;
+ case '\t': text = "\\t"; break;
+ default:
+ {
+ sprintf(seq, "\\u00%02x", *end);
+ text = seq;
+ length = 6;
+ break;
+ }
}
+
+ if(dump(text, length, data))
+ return -1;
+
+ end++;
str = end;
}
return dump("\"", 1, data);
}
-static int do_dump(const json_t *json, uint32_t flags, int depth,
+static int do_dump(const json_t *json, unsigned long flags, int depth,
dump_func dump, void *data)
{
switch(json_typeof(json)) {
case JSON_FALSE:
return dump("false", 5, data);
- case JSON_NUMBER:
+ case JSON_INTEGER:
{
- char *buffer;
- int size, ret;
+ char buffer[MAX_INTEGER_STR_LENGTH];
+ int size;
- size = asprintf(&buffer, "%.17f", json_number_value(json));
- if(size == -1)
+ size = snprintf(buffer, MAX_INTEGER_STR_LENGTH, "%d", json_integer_value(json));
+ if(size >= MAX_INTEGER_STR_LENGTH)
return -1;
- ret = dump(buffer, size, data);
- free(buffer);
- return ret;
+ return dump(buffer, size, data);
+ }
+
+ case JSON_REAL:
+ {
+ char buffer[MAX_REAL_STR_LENGTH];
+ int size;
+
+ size = snprintf(buffer, MAX_REAL_STR_LENGTH, "%0.17f", json_real_value(json));
+ if(size >= MAX_REAL_STR_LENGTH)
+ return -1;
+
+ return dump(buffer, size, data);
}
case JSON_STRING:
case JSON_ARRAY:
{
int i;
- int n = json_array_size(json);
+ int n;
+ json_array_t *array;
+
+ /* detect circular references */
+ array = json_to_array(json);
+ if(array->visited)
+ return -1;
+ array->visited = 1;
+
+ n = json_array_size(json);
if(dump("[", 1, data))
return -1;
if(n == 0)
- dump("]", 1, data);
+ return dump("]", 1, data);
if(dump_indent(flags, depth + 1, dump, data))
return -1;
return -1;
}
}
+
+ array->visited = 0;
return dump("]", 1, data);
}
case JSON_OBJECT:
{
- void *iter = json_object_iter((json_t *)json);
+ json_object_t *object;
+ void *iter;
+
+ /* detect circular references */
+ object = json_to_object(json);
+ if(object->visited)
+ return -1;
+ object->visited = 1;
+
+ iter = json_object_iter((json_t *)json);
if(dump("{", 1, data))
return -1;
iter = next;
}
+
+ object->visited = 0;
return dump("}", 1, data);
}
}
-int json_dump(const json_t *json, const char *path, uint32_t flags)
-{
- FILE *output = fopen(path, "w");
- if(!output)
- return -1;
-
- return json_dumpf(json, output, flags);
-}
-
-char *json_dumps(const json_t *json, uint32_t flags)
+char *json_dumps(const json_t *json, unsigned long flags)
{
strbuffer_t strbuff;
char *result;
- strbuffer_init(&strbuff);
+ if(!json_is_array(json) && !json_is_object(json))
+ return NULL;
- if(do_dump(json, flags, 0, dump_to_strbuffer, (void *)&strbuff))
+ if(strbuffer_init(&strbuff))
return NULL;
- if(dump_to_strbuffer("\n", 1, (void *)&strbuff))
+ if(do_dump(json, flags, 0, dump_to_strbuffer, (void *)&strbuff)) {
+ strbuffer_close(&strbuff);
return NULL;
+ }
- result = strbuffer_value(&strbuff);
+ if(dump_to_strbuffer("\n", 1, (void *)&strbuff)) {
+ strbuffer_close(&strbuff);
+ return NULL;
+ }
+
+ result = strdup(strbuffer_value(&strbuff));
strbuffer_close(&strbuff);
return result;
}
-int json_dumpf(const json_t *json, FILE *output, uint32_t flags)
+int json_dumpf(const json_t *json, FILE *output, unsigned long flags)
{
+ if(!json_is_array(json) && !json_is_object(json))
+ return -1;
+
if(do_dump(json, flags, 0, dump_to_file, (void *)output))
return -1;
return dump_to_file("\n", 1, (void *)output);
}
-int json_dumpfd(const json_t *json, int fd, uint32_t flags)
+int json_dump_file(const json_t *json, const char *path, unsigned long flags)
{
- if(do_dump(json, flags, 0, dump_to_fd, (void *)&fd))
+ int result;
+
+ FILE *output = fopen(path, "w");
+ if(!output)
return -1;
- return dump_to_fd("\n", 1, (void *)&fd);
+
+ result = json_dumpf(json, output, flags);
+
+ fclose(output);
+ return result;
}
projects / jansson.git / blobdiff