--- /dev/null
+/*
+ * Copyright (c) 2009-2016 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.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include "jansson_private.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "jansson.h"
+#include "strbuffer.h"
+#include "utf.h"
+
+#define MAX_INTEGER_STR_LENGTH 100
+#define MAX_REAL_STR_LENGTH 100
+
+#define FLAGS_TO_INDENT(f) ((f) & 0x1F)
+#define FLAGS_TO_PRECISION(f) (((f) >> 11) & 0x1F)
+
+struct buffer {
+ const size_t size;
+ size_t used;
+ char *data;
+};
+
+static int dump_to_strbuffer(const char *buffer, size_t size, void *data)
+{
+ return strbuffer_append_bytes((strbuffer_t *)data, buffer, size);
+}
+
+static int dump_to_buffer(const char *buffer, size_t size, void *data)
+{
+ struct buffer *buf = (struct buffer *)data;
+
+ if(buf->used + size <= buf->size)
+ memcpy(&buf->data[buf->used], buffer, size);
+
+ buf->used += size;
+ return 0;
+}
+
+static int dump_to_file(const char *buffer, size_t size, void *data)
+{
+ FILE *dest = (FILE *)data;
+ if(fwrite(buffer, size, 1, dest) != 1)
+ return -1;
+ return 0;
+}
+
+static int dump_to_fd(const char *buffer, size_t size, void *data)
+{
+ int *dest = (int *)data;
+#ifdef HAVE_UNISTD_H
+ if(write(*dest, buffer, size) == (ssize_t)size)
+ return 0;
+#endif
+ return -1;
+}
+
+/* 32 spaces (the maximum indentation size) */
+static const char whitespace[] = " ";
+
+static int dump_indent(size_t flags, int depth, int space, json_dump_callback_t dump, void *data)
+{
+ if(FLAGS_TO_INDENT(flags) > 0)
+ {
+ unsigned int ws_count = FLAGS_TO_INDENT(flags), n_spaces = depth * ws_count;
+
+ if(dump("\n", 1, data))
+ return -1;
+
+ while(n_spaces > 0)
+ {
+ int cur_n = n_spaces < sizeof whitespace - 1 ? n_spaces : sizeof whitespace - 1;
+
+ if(dump(whitespace, cur_n, data))
+ return -1;
+
+ n_spaces -= cur_n;
+ }
+ }
+ else if(space && !(flags & JSON_COMPACT))
+ {
+ return dump(" ", 1, data);
+ }
+ return 0;
+}
+
+static int dump_string(const char *str, size_t len, json_dump_callback_t dump, void *data, size_t flags)
+{
+ const char *pos, *end, *lim;
+ int32_t codepoint;
+
+ if(dump("\"", 1, data))
+ return -1;
+
+ end = pos = str;
+ lim = str + len;
+ while(1)
+ {
+ const char *text;
+ char seq[13];
+ int length;
+
+ while(end < lim)
+ {
+ end = utf8_iterate(pos, lim - pos, &codepoint);
+ if(!end)
+ return -1;
+
+ /* mandatory escape or control char */
+ if(codepoint == '\\' || codepoint == '"' || codepoint < 0x20)
+ break;
+
+ /* slash */
+ if((flags & JSON_ESCAPE_SLASH) && codepoint == '/')
+ break;
+
+ /* non-ASCII */
+ if((flags & JSON_ENSURE_ASCII) && codepoint > 0x7F)
+ break;
+
+ pos = end;
+ }
+
+ if(pos != str) {
+ if(dump(str, pos - str, data))
+ return -1;
+ }
+
+ if(end == pos)
+ break;
+
+ /* handle \, /, ", and control codes */
+ length = 2;
+ switch(codepoint)
+ {
+ 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;
+ case '/': text = "\\/"; break;
+ default:
+ {
+ /* codepoint is in BMP */
+ if(codepoint < 0x10000)
+ {
+ snprintf(seq, sizeof(seq), "\\u%04X", (unsigned int)codepoint);
+ length = 6;
+ }
+
+ /* not in BMP -> construct a UTF-16 surrogate pair */
+ else
+ {
+ int32_t first, last;
+
+ codepoint -= 0x10000;
+ first = 0xD800 | ((codepoint & 0xffc00) >> 10);
+ last = 0xDC00 | (codepoint & 0x003ff);
+
+ snprintf(seq, sizeof(seq), "\\u%04X\\u%04X", (unsigned int)first, (unsigned int)last);
+ length = 12;
+ }
+
+ text = seq;
+ break;
+ }
+ }
+
+ if(dump(text, length, data))
+ return -1;
+
+ str = pos = end;
+ }
+
+ return dump("\"", 1, data);
+}
+
+static int compare_keys(const void *key1, const void *key2)
+{
+ return strcmp(*(const char **)key1, *(const char **)key2);
+}
+
+static int loop_check(hashtable_t *parents, const json_t *json, char *key, size_t key_size)
+{
+ snprintf(key, key_size, "%p", json);
+ if (hashtable_get(parents, key))
+ return -1;
+
+ return hashtable_set(parents, key, json_null());
+}
+
+static int do_dump(const json_t *json, size_t flags, int depth,
+ hashtable_t *parents, json_dump_callback_t dump, void *data)
+{
+ int embed = flags & JSON_EMBED;
+
+ flags &= ~JSON_EMBED;
+
+ if(!json)
+ return -1;
+
+ switch(json_typeof(json)) {
+ case JSON_NULL:
+ return dump("null", 4, data);
+
+ case JSON_TRUE:
+ return dump("true", 4, data);
+
+ case JSON_FALSE:
+ return dump("false", 5, data);
+
+ case JSON_INTEGER:
+ {
+ char buffer[MAX_INTEGER_STR_LENGTH];
+ int size;
+
+ size = snprintf(buffer, MAX_INTEGER_STR_LENGTH,
+ "%" JSON_INTEGER_FORMAT,
+ json_integer_value(json));
+ if(size < 0 || size >= MAX_INTEGER_STR_LENGTH)
+ return -1;
+
+ return dump(buffer, size, data);
+ }
+
+ case JSON_REAL:
+ {
+ char buffer[MAX_REAL_STR_LENGTH];
+ int size;
+ double value = json_real_value(json);
+
+ size = jsonp_dtostr(buffer, MAX_REAL_STR_LENGTH, value,
+ FLAGS_TO_PRECISION(flags));
+ if(size < 0)
+ return -1;
+
+ return dump(buffer, size, data);
+ }
+
+ case JSON_STRING:
+ return dump_string(json_string_value(json), json_string_length(json), dump, data, flags);
+
+ case JSON_ARRAY:
+ {
+ size_t n;
+ size_t i;
+ /* Space for "0x", double the sizeof a pointer for the hex and a terminator. */
+ char key[2 + (sizeof(json) * 2) + 1];
+
+ /* detect circular references */
+ if (loop_check(parents, json, key, sizeof(key)))
+ return -1;
+
+ n = json_array_size(json);
+
+ if(!embed && dump("[", 1, data))
+ return -1;
+ if(n == 0) {
+ hashtable_del(parents, key);
+ return embed ? 0 : dump("]", 1, data);
+ }
+ if(dump_indent(flags, depth + 1, 0, dump, data))
+ return -1;
+
+ for(i = 0; i < n; ++i) {
+ if(do_dump(json_array_get(json, i), flags, depth + 1,
+ parents, dump, data))
+ return -1;
+
+ if(i < n - 1)
+ {
+ if(dump(",", 1, data) ||
+ dump_indent(flags, depth + 1, 1, dump, data))
+ return -1;
+ }
+ else
+ {
+ if(dump_indent(flags, depth, 0, dump, data))
+ return -1;
+ }
+ }
+
+ hashtable_del(parents, key);
+ return embed ? 0 : dump("]", 1, data);
+ }
+
+ case JSON_OBJECT:
+ {
+ void *iter;
+ const char *separator;
+ int separator_length;
+ /* Space for "0x", double the sizeof a pointer for the hex and a terminator. */
+ char key[2 + (sizeof(json) * 2) + 1];
+
+ if(flags & JSON_COMPACT) {
+ separator = ":";
+ separator_length = 1;
+ }
+ else {
+ separator = ": ";
+ separator_length = 2;
+ }
+
+ /* detect circular references */
+ if (loop_check(parents, json, key, sizeof(key)))
+ return -1;
+
+ iter = json_object_iter((json_t *)json);
+
+ if(!embed && dump("{", 1, data))
+ return -1;
+ if(!iter) {
+ hashtable_del(parents, key);
+ return embed ? 0 : dump("}", 1, data);
+ }
+ if(dump_indent(flags, depth + 1, 0, dump, data))
+ return -1;
+
+ if(flags & JSON_SORT_KEYS)
+ {
+ const char **keys;
+ size_t size, i;
+
+ size = json_object_size(json);
+ keys = jsonp_malloc(size * sizeof(const char *));
+ if(!keys)
+ return -1;
+
+ i = 0;
+ while(iter)
+ {
+ keys[i] = json_object_iter_key(iter);
+ iter = json_object_iter_next((json_t *)json, iter);
+ i++;
+ }
+ assert(i == size);
+
+ qsort(keys, size, sizeof(const char *), compare_keys);
+
+ for(i = 0; i < size; i++)
+ {
+ const char *key;
+ json_t *value;
+
+ key = keys[i];
+ value = json_object_get(json, key);
+ assert(value);
+
+ dump_string(key, strlen(key), dump, data, flags);
+ if(dump(separator, separator_length, data) ||
+ do_dump(value, flags, depth + 1, parents, dump, data))
+ {
+ jsonp_free(keys);
+ return -1;
+ }
+
+ if(i < size - 1)
+ {
+ if(dump(",", 1, data) ||
+ dump_indent(flags, depth + 1, 1, dump, data))
+ {
+ jsonp_free(keys);
+ return -1;
+ }
+ }
+ else
+ {
+ if(dump_indent(flags, depth, 0, dump, data))
+ {
+ jsonp_free(keys);
+ return -1;
+ }
+ }
+ }
+
+ jsonp_free(keys);
+ }
+ else
+ {
+ /* Don't sort keys */
+
+ while(iter)
+ {
+ void *next = json_object_iter_next((json_t *)json, iter);
+ const char *key = json_object_iter_key(iter);
+
+ dump_string(key, strlen(key), dump, data, flags);
+ if(dump(separator, separator_length, data) ||
+ do_dump(json_object_iter_value(iter), flags, depth + 1,
+ parents, dump, data))
+ return -1;
+
+ if(next)
+ {
+ if(dump(",", 1, data) ||
+ dump_indent(flags, depth + 1, 1, dump, data))
+ return -1;
+ }
+ else
+ {
+ if(dump_indent(flags, depth, 0, dump, data))
+ return -1;
+ }
+
+ iter = next;
+ }
+ }
+
+ hashtable_del(parents, key);
+ return embed ? 0 : dump("}", 1, data);
+ }
+
+ default:
+ /* not reached */
+ return -1;
+ }
+}
+
+char *json_dumps(const json_t *json, size_t flags)
+{
+ strbuffer_t strbuff;
+ char *result;
+
+ if(strbuffer_init(&strbuff))
+ return NULL;
+
+ if(json_dump_callback(json, dump_to_strbuffer, (void *)&strbuff, flags))
+ result = NULL;
+ else
+ result = jsonp_strdup(strbuffer_value(&strbuff));
+
+ strbuffer_close(&strbuff);
+ return result;
+}
+
+size_t json_dumpb(const json_t *json, char *buffer, size_t size, size_t flags)
+{
+ struct buffer buf = { size, 0, buffer };
+
+ if(json_dump_callback(json, dump_to_buffer, (void *)&buf, flags))
+ return 0;
+
+ return buf.used;
+}
+
+int json_dumpf(const json_t *json, FILE *output, size_t flags)
+{
+ return json_dump_callback(json, dump_to_file, (void *)output, flags);
+}
+
+int json_dumpfd(const json_t *json, int output, size_t flags)
+{
+ return json_dump_callback(json, dump_to_fd, (void *)&output, flags);
+}
+
+int json_dump_file(const json_t *json, const char *path, size_t flags)
+{
+ int result;
+
+ FILE *output = fopen(path, "w");
+ if(!output)
+ return -1;
+
+ result = json_dumpf(json, output, flags);
+
+ if(fclose(output) != 0)
+ return -1;
+
+ return result;
+}
+
+int json_dump_callback(const json_t *json, json_dump_callback_t callback, void *data, size_t flags)
+{
+ int res;
+ hashtable_t parents_set;
+
+ if(!(flags & JSON_ENCODE_ANY)) {
+ if(!json_is_array(json) && !json_is_object(json))
+ return -1;
+ }
+
+ if (hashtable_init(&parents_set))
+ return -1;
+ res = do_dump(json, flags, 0, &parents_set, callback, data);
+ hashtable_close(&parents_set);
+
+ return res;
+}
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