+/*
+ * 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 <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
+{
+ char *buffer;
+ int length;
+ int size;
+};
+
+static int dump_to_strbuffer(const char *buffer, int size, void *data)
+{
+ return strbuffer_append_bytes((strbuffer_t *)data, buffer, size);
+}
+
+static int dump_to_file(const char *buffer, int size, void *data)
+{
+ FILE *dest = (FILE *)data;
+ if(fwrite(buffer, size, 1, dest) != 1)
+ return -1;
+ return 0;
+}
+
+/* 256 spaces (the maximum indentation size) */
+static char whitespace[] = " ";
-char *json_dumps(const json_t *json, uint32_t flags)
+static int dump_indent(unsigned long flags, int depth, dump_func dump, void *data)
{
- (void)flags;
+ if(JSON_INDENT(flags) > 0)
+ {
+ int i, ws_count = JSON_INDENT(flags);
+
+ if(dump("\n", 1, data))
+ return -1;
+
+ for(i = 0; i < depth; i++)
+ {
+ if(dump(whitespace, ws_count, data))
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int dump_string(const char *str, dump_func dump, void *data)
+{
+ const char *end;
+
+ if(dump("\"", 1, data))
+ return -1;
+
+ end = str;
+ while(1)
+ {
+ const char *text;
+ char seq[7];
+ int length;
+ while(*end && *end != '\\' && *end != '"' && (unsigned char)*end > 0x1F)
+ end++;
+
+ if(end != str) {
+ if(dump(str, end - str, data))
+ return -1;
+ }
+
+ if(!*end)
+ break;
+
+ /* handle \, ", and control codes */
+ length = 2;
+ switch(*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, unsigned long flags, int depth,
+ dump_func dump, void *data)
+{
switch(json_typeof(json)) {
case JSON_NULL:
- printf("null");
- break;
+ return dump("null", 4, data);
case JSON_TRUE:
- printf("true");
- break;
+ return dump("true", 4, data);
case JSON_FALSE:
- printf("false");
- break;
+ return dump("false", 5, data);
- case JSON_NUMBER:
- printf("%f", json_number_value(json));
- break;
+ case JSON_INTEGER:
+ {
+ char buffer[MAX_INTEGER_STR_LENGTH];
+ int size;
+
+ size = snprintf(buffer, MAX_INTEGER_STR_LENGTH, "%d", json_integer_value(json));
+ if(size >= MAX_INTEGER_STR_LENGTH)
+ return -1;
+
+ 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:
- printf("%s", json_string_value(json));
- break;
+ return dump_string(json_string_value(json), dump, data);
+
+ case JSON_ARRAY:
+ {
+ int i;
+ 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)
+ return dump("]", 1, data);
+ if(dump_indent(flags, depth + 1, dump, data))
+ return -1;
- case JSON_ARRAY: {
- int i, n = json_array_size(json);
- printf("[");
for(i = 0; i < n; ++i) {
- json_dumps(json_array_get(json, i), 0);
+ if(do_dump(json_array_get(json, i), flags, depth + 1,
+ dump, data))
+ return -1;
+
if(i < n - 1)
- printf(", ");
+ {
+ if(dump(",", 1, data) ||
+ dump_indent(flags, depth + 1, dump, data))
+ return -1;
+ }
+ else
+ {
+ if(dump_indent(flags, depth, dump, data))
+ return -1;
+ }
}
- printf("]");
- break;
+
+ array->visited = 0;
+ return dump("]", 1, data);
+ }
+
+ case JSON_OBJECT:
+ {
+ 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;
+ if(!iter)
+ return dump("}", 1, data);
+ if(dump_indent(flags, depth + 1, dump, data))
+ return -1;
+
+ while(iter)
+ {
+ void *next = json_object_iter_next((json_t *)json, iter);
+
+ dump_string(json_object_iter_key(iter), dump, data);
+ if(dump(": ", 2, data) ||
+ do_dump(json_object_iter_value(iter), flags, depth + 1,
+ dump, data))
+ return -1;
+
+ if(next)
+ {
+ if(dump(",", 1, data) ||
+ dump_indent(flags, depth + 1, dump, data))
+ return -1;
+ }
+ else
+ {
+ if(dump_indent(flags, depth, dump, data))
+ return -1;
+ }
+
+ iter = next;
+ }
+
+ object->visited = 0;
+ return dump("}", 1, data);
}
default:
- printf("<object>");
- break;
+ /* not reached */
+ return -1;
+ }
+}
+
+
+char *json_dumps(const json_t *json, unsigned long flags)
+{
+ strbuffer_t strbuff;
+ char *result;
+
+ if(!json_is_array(json) && !json_is_object(json))
+ return NULL;
+
+ if(strbuffer_init(&strbuff))
+ return NULL;
+
+ if(do_dump(json, flags, 0, dump_to_strbuffer, (void *)&strbuff)) {
+ strbuffer_close(&strbuff);
+ return NULL;
+ }
+
+ if(dump_to_strbuffer("\n", 1, (void *)&strbuff)) {
+ strbuffer_close(&strbuff);
+ return NULL;
}
- return NULL;
+
+ result = strdup(strbuffer_value(&strbuff));
+ strbuffer_close(&strbuff);
+
+ return result;
+}
+
+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_dump_file(const json_t *json, const char *path, unsigned long flags)
+{
+ int result;
+
+ FILE *output = fopen(path, "w");
+ if(!output)
+ return -1;
+
+ result = json_dumpf(json, output, flags);
+
+ fclose(output);
+ return result;
+}
projects / jansson.git / blobdiff