1154 lines
27 KiB
C
1154 lines
27 KiB
C
/*
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* Copyright (c) 2009-2016 Petri Lehtinen <petri@digip.org>
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*
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* Jansson is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include "jansson_private.h"
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "jansson.h"
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#include "strbuffer.h"
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#include "utf.h"
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#define STREAM_STATE_OK 0
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#define STREAM_STATE_EOF -1
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#define STREAM_STATE_ERROR -2
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#define TOKEN_INVALID -1
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#define TOKEN_EOF 0
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#define TOKEN_STRING 256
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#define TOKEN_INTEGER 257
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#define TOKEN_REAL 258
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#define TOKEN_TRUE 259
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#define TOKEN_FALSE 260
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#define TOKEN_NULL 261
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/* Locale independent versions of isxxx() functions */
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#define l_isupper(c) ('A' <= (c) && (c) <= 'Z')
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#define l_islower(c) ('a' <= (c) && (c) <= 'z')
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#define l_isalpha(c) (l_isupper(c) || l_islower(c))
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#define l_isdigit(c) ('0' <= (c) && (c) <= '9')
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#define l_isxdigit(c) \
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(l_isdigit(c) || ('A' <= (c) && (c) <= 'F') || ('a' <= (c) && (c) <= 'f'))
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/* Read one byte from stream, convert to unsigned char, then int, and
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return. return EOF on end of file. This corresponds to the
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behaviour of fgetc(). */
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typedef int (*get_func)(void *data);
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typedef struct {
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get_func get;
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void *data;
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char buffer[5];
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size_t buffer_pos;
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int state;
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int line;
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int column, last_column;
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size_t position;
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} stream_t;
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typedef struct {
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stream_t stream;
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strbuffer_t saved_text;
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size_t flags;
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size_t depth;
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int token;
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union {
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struct {
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char *val;
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size_t len;
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} string;
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json_int_t integer;
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double real;
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} value;
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} lex_t;
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#define stream_to_lex(stream) container_of(stream, lex_t, stream)
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/*** error reporting ***/
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static void error_set(json_error_t *error, const lex_t *lex,
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const char *msg, ...)
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{
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va_list ap;
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char msg_text[JSON_ERROR_TEXT_LENGTH];
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char msg_with_context[JSON_ERROR_TEXT_LENGTH];
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int line = -1, col = -1;
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size_t pos = 0;
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const char *result = msg_text;
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if(!error)
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return;
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va_start(ap, msg);
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vsnprintf(msg_text, JSON_ERROR_TEXT_LENGTH, msg, ap);
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msg_text[JSON_ERROR_TEXT_LENGTH - 1] = '\0';
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va_end(ap);
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if(lex)
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{
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const char *saved_text = strbuffer_value(&lex->saved_text);
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line = lex->stream.line;
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col = lex->stream.column;
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pos = lex->stream.position;
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if(saved_text && saved_text[0])
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{
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if(lex->saved_text.length <= 20) {
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snprintf(msg_with_context, JSON_ERROR_TEXT_LENGTH,
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"%s near '%s'", msg_text, saved_text);
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msg_with_context[JSON_ERROR_TEXT_LENGTH - 1] = '\0';
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result = msg_with_context;
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}
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}
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else
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{
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if(lex->stream.state == STREAM_STATE_ERROR) {
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/* No context for UTF-8 decoding errors */
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result = msg_text;
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}
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else {
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snprintf(msg_with_context, JSON_ERROR_TEXT_LENGTH,
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"%s near end of file", msg_text);
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msg_with_context[JSON_ERROR_TEXT_LENGTH - 1] = '\0';
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result = msg_with_context;
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}
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}
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}
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jsonp_error_set(error, line, col, pos, "%s", result);
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}
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/*** lexical analyzer ***/
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static void
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stream_init(stream_t *stream, get_func get, void *data)
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{
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stream->get = get;
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stream->data = data;
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stream->buffer[0] = '\0';
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stream->buffer_pos = 0;
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stream->state = STREAM_STATE_OK;
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stream->line = 1;
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stream->column = 0;
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stream->position = 0;
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}
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static int stream_get(stream_t *stream, json_error_t *error)
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{
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int c;
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if(stream->state != STREAM_STATE_OK)
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return stream->state;
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if(!stream->buffer[stream->buffer_pos])
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{
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c = stream->get(stream->data);
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if(c == EOF) {
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stream->state = STREAM_STATE_EOF;
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return STREAM_STATE_EOF;
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}
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stream->buffer[0] = c;
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stream->buffer_pos = 0;
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if(0x80 <= c && c <= 0xFF)
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{
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/* multi-byte UTF-8 sequence */
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size_t i, count;
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count = utf8_check_first(c);
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if(!count)
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goto out;
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assert(count >= 2);
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for(i = 1; i < count; i++)
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stream->buffer[i] = stream->get(stream->data);
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if(!utf8_check_full(stream->buffer, count, NULL))
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goto out;
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stream->buffer[count] = '\0';
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}
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else
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stream->buffer[1] = '\0';
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}
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c = stream->buffer[stream->buffer_pos++];
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stream->position++;
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if(c == '\n') {
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stream->line++;
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stream->last_column = stream->column;
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stream->column = 0;
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}
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else if(utf8_check_first(c)) {
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/* track the Unicode character column, so increment only if
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this is the first character of a UTF-8 sequence */
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stream->column++;
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}
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return c;
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out:
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stream->state = STREAM_STATE_ERROR;
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error_set(error, stream_to_lex(stream), "unable to decode byte 0x%x", c);
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return STREAM_STATE_ERROR;
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}
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static void stream_unget(stream_t *stream, int c)
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{
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if(c == STREAM_STATE_EOF || c == STREAM_STATE_ERROR)
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return;
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stream->position--;
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if(c == '\n') {
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stream->line--;
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stream->column = stream->last_column;
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}
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else if(utf8_check_first(c))
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stream->column--;
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assert(stream->buffer_pos > 0);
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stream->buffer_pos--;
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assert(stream->buffer[stream->buffer_pos] == c);
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}
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static int lex_get(lex_t *lex, json_error_t *error)
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{
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return stream_get(&lex->stream, error);
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}
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static void lex_save(lex_t *lex, int c)
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{
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strbuffer_append_byte(&lex->saved_text, c);
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}
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static int lex_get_save(lex_t *lex, json_error_t *error)
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{
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int c = stream_get(&lex->stream, error);
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if(c != STREAM_STATE_EOF && c != STREAM_STATE_ERROR)
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lex_save(lex, c);
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return c;
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}
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static void lex_unget(lex_t *lex, int c)
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{
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stream_unget(&lex->stream, c);
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}
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static void lex_unget_unsave(lex_t *lex, int c)
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{
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if(c != STREAM_STATE_EOF && c != STREAM_STATE_ERROR) {
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/* Since we treat warnings as errors, when assertions are turned
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* off the "d" variable would be set but never used. Which is
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* treated as an error by GCC.
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*/
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#ifndef NDEBUG
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char d;
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#endif
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stream_unget(&lex->stream, c);
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#ifndef NDEBUG
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d =
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#endif
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strbuffer_pop(&lex->saved_text);
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assert(c == d);
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}
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}
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static void lex_save_cached(lex_t *lex)
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{
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while(lex->stream.buffer[lex->stream.buffer_pos] != '\0')
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{
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lex_save(lex, lex->stream.buffer[lex->stream.buffer_pos]);
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lex->stream.buffer_pos++;
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lex->stream.position++;
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}
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}
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static void lex_free_string(lex_t *lex)
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{
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jsonp_free(lex->value.string.val);
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lex->value.string.val = NULL;
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lex->value.string.len = 0;
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}
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/* assumes that str points to 'u' plus at least 4 valid hex digits */
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static int32_t decode_unicode_escape(const char *str)
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{
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int i;
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int32_t value = 0;
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assert(str[0] == 'u');
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for(i = 1; i <= 4; i++) {
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char c = str[i];
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value <<= 4;
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if(l_isdigit(c))
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value += c - '0';
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else if(l_islower(c))
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value += c - 'a' + 10;
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else if(l_isupper(c))
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value += c - 'A' + 10;
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else
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return -1;
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}
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return value;
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}
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static void lex_scan_string(lex_t *lex, json_error_t *error)
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{
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int c;
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const char *p;
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char *t;
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int i;
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lex->value.string.val = NULL;
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lex->token = TOKEN_INVALID;
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c = lex_get_save(lex, error);
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while(c != '"') {
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if(c == STREAM_STATE_ERROR)
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goto out;
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else if(c == STREAM_STATE_EOF) {
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error_set(error, lex, "premature end of input");
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goto out;
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}
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else if(0 <= c && c <= 0x1F) {
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/* control character */
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lex_unget_unsave(lex, c);
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if(c == '\n')
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error_set(error, lex, "unexpected newline");
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else
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error_set(error, lex, "control character 0x%x", c);
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goto out;
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}
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else if(c == '\\') {
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c = lex_get_save(lex, error);
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if(c == 'u') {
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c = lex_get_save(lex, error);
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for(i = 0; i < 4; i++) {
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if(!l_isxdigit(c)) {
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error_set(error, lex, "invalid escape");
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goto out;
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}
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c = lex_get_save(lex, error);
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}
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}
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else if(c == '"' || c == '\\' || c == '/' || c == 'b' ||
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c == 'f' || c == 'n' || c == 'r' || c == 't')
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c = lex_get_save(lex, error);
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else {
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error_set(error, lex, "invalid escape");
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goto out;
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}
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}
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else
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c = lex_get_save(lex, error);
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}
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/* the actual value is at most of the same length as the source
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string, because:
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- shortcut escapes (e.g. "\t") (length 2) are converted to 1 byte
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- a single \uXXXX escape (length 6) is converted to at most 3 bytes
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- two \uXXXX escapes (length 12) forming an UTF-16 surrogate pair
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are converted to 4 bytes
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*/
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t = jsonp_malloc(lex->saved_text.length + 1);
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if(!t) {
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/* this is not very nice, since TOKEN_INVALID is returned */
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goto out;
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}
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lex->value.string.val = t;
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/* + 1 to skip the " */
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p = strbuffer_value(&lex->saved_text) + 1;
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while(*p != '"') {
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if(*p == '\\') {
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p++;
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if(*p == 'u') {
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size_t length;
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int32_t value;
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value = decode_unicode_escape(p);
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if(value < 0) {
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error_set(error, lex, "invalid Unicode escape '%.6s'", p - 1);
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goto out;
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}
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p += 5;
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if(0xD800 <= value && value <= 0xDBFF) {
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/* surrogate pair */
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if(*p == '\\' && *(p + 1) == 'u') {
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int32_t value2 = decode_unicode_escape(++p);
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if(value2 < 0) {
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error_set(error, lex, "invalid Unicode escape '%.6s'", p - 1);
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goto out;
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}
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p += 5;
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if(0xDC00 <= value2 && value2 <= 0xDFFF) {
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/* valid second surrogate */
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value =
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((value - 0xD800) << 10) +
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(value2 - 0xDC00) +
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0x10000;
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}
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else {
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/* invalid second surrogate */
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error_set(error, lex,
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"invalid Unicode '\\u%04X\\u%04X'",
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value, value2);
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goto out;
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}
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}
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else {
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/* no second surrogate */
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error_set(error, lex, "invalid Unicode '\\u%04X'",
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value);
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goto out;
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}
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}
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else if(0xDC00 <= value && value <= 0xDFFF) {
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error_set(error, lex, "invalid Unicode '\\u%04X'", value);
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goto out;
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}
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if(utf8_encode(value, t, &length))
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assert(0);
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t += length;
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}
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else {
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switch(*p) {
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case '"': case '\\': case '/':
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*t = *p; break;
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case 'b': *t = '\b'; break;
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case 'f': *t = '\f'; break;
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case 'n': *t = '\n'; break;
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case 'r': *t = '\r'; break;
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case 't': *t = '\t'; break;
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default: assert(0);
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}
|
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t++;
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p++;
|
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}
|
|
}
|
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else
|
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*(t++) = *(p++);
|
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}
|
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*t = '\0';
|
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lex->value.string.len = t - lex->value.string.val;
|
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lex->token = TOKEN_STRING;
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return;
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out:
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lex_free_string(lex);
|
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}
|
|
|
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#ifndef JANSSON_USING_CMAKE /* disabled if using cmake */
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#if JSON_INTEGER_IS_LONG_LONG
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#ifdef _MSC_VER /* Microsoft Visual Studio */
|
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#define json_strtoint _strtoi64
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#else
|
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#define json_strtoint strtoll
|
|
#endif
|
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#else
|
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#define json_strtoint strtol
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#endif
|
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#endif
|
|
|
|
static int lex_scan_number(lex_t *lex, int c, json_error_t *error)
|
|
{
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const char *saved_text;
|
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char *end;
|
|
double doubleval;
|
|
|
|
lex->token = TOKEN_INVALID;
|
|
|
|
if(c == '-')
|
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c = lex_get_save(lex, error);
|
|
|
|
if(c == '0') {
|
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c = lex_get_save(lex, error);
|
|
if(l_isdigit(c)) {
|
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lex_unget_unsave(lex, c);
|
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goto out;
|
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}
|
|
}
|
|
else if(l_isdigit(c)) {
|
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do
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c = lex_get_save(lex, error);
|
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while(l_isdigit(c));
|
|
}
|
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else {
|
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lex_unget_unsave(lex, c);
|
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goto out;
|
|
}
|
|
|
|
if(!(lex->flags & JSON_DECODE_INT_AS_REAL) &&
|
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c != '.' && c != 'E' && c != 'e')
|
|
{
|
|
json_int_t intval;
|
|
|
|
lex_unget_unsave(lex, c);
|
|
|
|
saved_text = strbuffer_value(&lex->saved_text);
|
|
|
|
errno = 0;
|
|
intval = json_strtoint(saved_text, &end, 10);
|
|
if(errno == ERANGE) {
|
|
if(intval < 0)
|
|
error_set(error, lex, "too big negative integer");
|
|
else
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error_set(error, lex, "too big integer");
|
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goto out;
|
|
}
|
|
|
|
assert(end == saved_text + lex->saved_text.length);
|
|
|
|
lex->token = TOKEN_INTEGER;
|
|
lex->value.integer = intval;
|
|
return 0;
|
|
}
|
|
|
|
if(c == '.') {
|
|
c = lex_get(lex, error);
|
|
if(!l_isdigit(c)) {
|
|
lex_unget(lex, c);
|
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goto out;
|
|
}
|
|
lex_save(lex, c);
|
|
|
|
do
|
|
c = lex_get_save(lex, error);
|
|
while(l_isdigit(c));
|
|
}
|
|
|
|
if(c == 'E' || c == 'e') {
|
|
c = lex_get_save(lex, error);
|
|
if(c == '+' || c == '-')
|
|
c = lex_get_save(lex, error);
|
|
|
|
if(!l_isdigit(c)) {
|
|
lex_unget_unsave(lex, c);
|
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goto out;
|
|
}
|
|
|
|
do
|
|
c = lex_get_save(lex, error);
|
|
while(l_isdigit(c));
|
|
}
|
|
|
|
lex_unget_unsave(lex, c);
|
|
|
|
if(jsonp_strtod(&lex->saved_text, &doubleval)) {
|
|
error_set(error, lex, "real number overflow");
|
|
goto out;
|
|
}
|
|
|
|
lex->token = TOKEN_REAL;
|
|
lex->value.real = doubleval;
|
|
return 0;
|
|
|
|
out:
|
|
return -1;
|
|
}
|
|
|
|
static int lex_scan(lex_t *lex, json_error_t *error)
|
|
{
|
|
int c;
|
|
|
|
strbuffer_clear(&lex->saved_text);
|
|
|
|
if(lex->token == TOKEN_STRING)
|
|
lex_free_string(lex);
|
|
|
|
do
|
|
c = lex_get(lex, error);
|
|
while(c == ' ' || c == '\t' || c == '\n' || c == '\r');
|
|
|
|
if(c == STREAM_STATE_EOF) {
|
|
lex->token = TOKEN_EOF;
|
|
goto out;
|
|
}
|
|
|
|
if(c == STREAM_STATE_ERROR) {
|
|
lex->token = TOKEN_INVALID;
|
|
goto out;
|
|
}
|
|
|
|
lex_save(lex, c);
|
|
|
|
if(c == '{' || c == '}' || c == '[' || c == ']' || c == ':' || c == ',')
|
|
lex->token = c;
|
|
|
|
else if(c == '"')
|
|
lex_scan_string(lex, error);
|
|
|
|
else if(l_isdigit(c) || c == '-') {
|
|
if(lex_scan_number(lex, c, error))
|
|
goto out;
|
|
}
|
|
|
|
else if(l_isalpha(c)) {
|
|
/* eat up the whole identifier for clearer error messages */
|
|
const char *saved_text;
|
|
|
|
do
|
|
c = lex_get_save(lex, error);
|
|
while(l_isalpha(c));
|
|
lex_unget_unsave(lex, c);
|
|
|
|
saved_text = strbuffer_value(&lex->saved_text);
|
|
|
|
if(strcmp(saved_text, "true") == 0)
|
|
lex->token = TOKEN_TRUE;
|
|
else if(strcmp(saved_text, "false") == 0)
|
|
lex->token = TOKEN_FALSE;
|
|
else if(strcmp(saved_text, "null") == 0)
|
|
lex->token = TOKEN_NULL;
|
|
else
|
|
lex->token = TOKEN_INVALID;
|
|
}
|
|
|
|
else {
|
|
/* save the rest of the input UTF-8 sequence to get an error
|
|
message of valid UTF-8 */
|
|
lex_save_cached(lex);
|
|
lex->token = TOKEN_INVALID;
|
|
}
|
|
|
|
out:
|
|
return lex->token;
|
|
}
|
|
|
|
static char *lex_steal_string(lex_t *lex, size_t *out_len)
|
|
{
|
|
char *result = NULL;
|
|
if(lex->token == TOKEN_STRING) {
|
|
result = lex->value.string.val;
|
|
*out_len = lex->value.string.len;
|
|
lex->value.string.val = NULL;
|
|
lex->value.string.len = 0;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static int lex_init(lex_t *lex, get_func get, size_t flags, void *data)
|
|
{
|
|
stream_init(&lex->stream, get, data);
|
|
if(strbuffer_init(&lex->saved_text))
|
|
return -1;
|
|
|
|
lex->flags = flags;
|
|
lex->token = TOKEN_INVALID;
|
|
return 0;
|
|
}
|
|
|
|
static void lex_close(lex_t *lex)
|
|
{
|
|
if(lex->token == TOKEN_STRING)
|
|
lex_free_string(lex);
|
|
strbuffer_close(&lex->saved_text);
|
|
}
|
|
|
|
|
|
/*** parser ***/
|
|
|
|
static json_t *parse_value(lex_t *lex, size_t flags, json_error_t *error);
|
|
|
|
static json_t *parse_object(lex_t *lex, size_t flags, json_error_t *error)
|
|
{
|
|
json_t *object = json_object();
|
|
if(!object)
|
|
return NULL;
|
|
|
|
lex_scan(lex, error);
|
|
if(lex->token == '}')
|
|
return object;
|
|
|
|
while(1) {
|
|
char *key;
|
|
size_t len;
|
|
json_t *value;
|
|
|
|
if(lex->token != TOKEN_STRING) {
|
|
error_set(error, lex, "string or '}' expected");
|
|
goto error;
|
|
}
|
|
|
|
key = lex_steal_string(lex, &len);
|
|
if(!key)
|
|
return NULL;
|
|
if (memchr(key, '\0', len)) {
|
|
jsonp_free(key);
|
|
error_set(error, lex, "NUL byte in object key not supported");
|
|
goto error;
|
|
}
|
|
|
|
if(flags & JSON_REJECT_DUPLICATES) {
|
|
if(json_object_get(object, key)) {
|
|
jsonp_free(key);
|
|
error_set(error, lex, "duplicate object key");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
lex_scan(lex, error);
|
|
if(lex->token != ':') {
|
|
jsonp_free(key);
|
|
error_set(error, lex, "':' expected");
|
|
goto error;
|
|
}
|
|
|
|
lex_scan(lex, error);
|
|
value = parse_value(lex, flags, error);
|
|
if(!value) {
|
|
jsonp_free(key);
|
|
goto error;
|
|
}
|
|
|
|
if(json_object_set_nocheck(object, key, value)) {
|
|
jsonp_free(key);
|
|
json_decref(value);
|
|
goto error;
|
|
}
|
|
|
|
json_decref(value);
|
|
jsonp_free(key);
|
|
|
|
lex_scan(lex, error);
|
|
if(lex->token != ',')
|
|
break;
|
|
|
|
lex_scan(lex, error);
|
|
}
|
|
|
|
if(lex->token != '}') {
|
|
error_set(error, lex, "'}' expected");
|
|
goto error;
|
|
}
|
|
|
|
return object;
|
|
|
|
error:
|
|
json_decref(object);
|
|
return NULL;
|
|
}
|
|
|
|
static json_t *parse_array(lex_t *lex, size_t flags, json_error_t *error)
|
|
{
|
|
json_t *array = json_array();
|
|
if(!array)
|
|
return NULL;
|
|
|
|
lex_scan(lex, error);
|
|
if(lex->token == ']')
|
|
return array;
|
|
|
|
while(lex->token) {
|
|
json_t *elem = parse_value(lex, flags, error);
|
|
if(!elem)
|
|
goto error;
|
|
|
|
if(json_array_append(array, elem)) {
|
|
json_decref(elem);
|
|
goto error;
|
|
}
|
|
json_decref(elem);
|
|
|
|
lex_scan(lex, error);
|
|
if(lex->token != ',')
|
|
break;
|
|
|
|
lex_scan(lex, error);
|
|
}
|
|
|
|
if(lex->token != ']') {
|
|
error_set(error, lex, "']' expected");
|
|
goto error;
|
|
}
|
|
|
|
return array;
|
|
|
|
error:
|
|
json_decref(array);
|
|
return NULL;
|
|
}
|
|
|
|
static json_t *parse_value(lex_t *lex, size_t flags, json_error_t *error)
|
|
{
|
|
json_t *json;
|
|
|
|
lex->depth++;
|
|
if(lex->depth > JSON_PARSER_MAX_DEPTH) {
|
|
error_set(error, lex, "maximum parsing depth reached");
|
|
return NULL;
|
|
}
|
|
|
|
switch(lex->token) {
|
|
case TOKEN_STRING: {
|
|
const char *value = lex->value.string.val;
|
|
size_t len = lex->value.string.len;
|
|
|
|
if(!(flags & JSON_ALLOW_NUL)) {
|
|
if(memchr(value, '\0', len)) {
|
|
error_set(error, lex, "\\u0000 is not allowed without JSON_ALLOW_NUL");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
json = jsonp_stringn_nocheck_own(value, len);
|
|
if(json) {
|
|
lex->value.string.val = NULL;
|
|
lex->value.string.len = 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case TOKEN_INTEGER: {
|
|
json = json_integer(lex->value.integer);
|
|
break;
|
|
}
|
|
|
|
case TOKEN_REAL: {
|
|
json = json_real(lex->value.real);
|
|
break;
|
|
}
|
|
|
|
case TOKEN_TRUE:
|
|
json = json_true();
|
|
break;
|
|
|
|
case TOKEN_FALSE:
|
|
json = json_false();
|
|
break;
|
|
|
|
case TOKEN_NULL:
|
|
json = json_null();
|
|
break;
|
|
|
|
case '{':
|
|
json = parse_object(lex, flags, error);
|
|
break;
|
|
|
|
case '[':
|
|
json = parse_array(lex, flags, error);
|
|
break;
|
|
|
|
case TOKEN_INVALID:
|
|
error_set(error, lex, "invalid token");
|
|
return NULL;
|
|
|
|
default:
|
|
error_set(error, lex, "unexpected token");
|
|
return NULL;
|
|
}
|
|
|
|
if(!json)
|
|
return NULL;
|
|
|
|
lex->depth--;
|
|
return json;
|
|
}
|
|
|
|
static json_t *parse_json(lex_t *lex, size_t flags, json_error_t *error)
|
|
{
|
|
json_t *result;
|
|
|
|
lex->depth = 0;
|
|
|
|
lex_scan(lex, error);
|
|
if(!(flags & JSON_DECODE_ANY)) {
|
|
if(lex->token != '[' && lex->token != '{') {
|
|
error_set(error, lex, "'[' or '{' expected");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
result = parse_value(lex, flags, error);
|
|
if(!result)
|
|
return NULL;
|
|
|
|
if(!(flags & JSON_DISABLE_EOF_CHECK)) {
|
|
lex_scan(lex, error);
|
|
if(lex->token != TOKEN_EOF) {
|
|
error_set(error, lex, "end of file expected");
|
|
json_decref(result);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if(error) {
|
|
/* Save the position even though there was no error */
|
|
error->position = (int)lex->stream.position;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
const char *data;
|
|
size_t pos;
|
|
} string_data_t;
|
|
|
|
static int string_get(void *data)
|
|
{
|
|
char c;
|
|
string_data_t *stream = (string_data_t *)data;
|
|
c = stream->data[stream->pos];
|
|
if(c == '\0')
|
|
return EOF;
|
|
else
|
|
{
|
|
stream->pos++;
|
|
return (unsigned char)c;
|
|
}
|
|
}
|
|
|
|
json_t *json_loads(const char *string, size_t flags, json_error_t *error)
|
|
{
|
|
lex_t lex;
|
|
json_t *result;
|
|
string_data_t stream_data;
|
|
|
|
jsonp_error_init(error, "<string>");
|
|
|
|
if (string == NULL) {
|
|
error_set(error, NULL, "wrong arguments");
|
|
return NULL;
|
|
}
|
|
|
|
stream_data.data = string;
|
|
stream_data.pos = 0;
|
|
|
|
if(lex_init(&lex, string_get, flags, (void *)&stream_data))
|
|
return NULL;
|
|
|
|
result = parse_json(&lex, flags, error);
|
|
|
|
lex_close(&lex);
|
|
return result;
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
const char *data;
|
|
size_t len;
|
|
size_t pos;
|
|
} buffer_data_t;
|
|
|
|
static int buffer_get(void *data)
|
|
{
|
|
char c;
|
|
buffer_data_t *stream = data;
|
|
if(stream->pos >= stream->len)
|
|
return EOF;
|
|
|
|
c = stream->data[stream->pos];
|
|
stream->pos++;
|
|
return (unsigned char)c;
|
|
}
|
|
|
|
json_t *json_loadb(const char *buffer, size_t buflen, size_t flags, json_error_t *error)
|
|
{
|
|
lex_t lex;
|
|
json_t *result;
|
|
buffer_data_t stream_data;
|
|
|
|
jsonp_error_init(error, "<buffer>");
|
|
|
|
if (buffer == NULL) {
|
|
error_set(error, NULL, "wrong arguments");
|
|
return NULL;
|
|
}
|
|
|
|
stream_data.data = buffer;
|
|
stream_data.pos = 0;
|
|
stream_data.len = buflen;
|
|
|
|
if(lex_init(&lex, buffer_get, flags, (void *)&stream_data))
|
|
return NULL;
|
|
|
|
result = parse_json(&lex, flags, error);
|
|
|
|
lex_close(&lex);
|
|
return result;
|
|
}
|
|
|
|
json_t *json_loadf(FILE *input, size_t flags, json_error_t *error)
|
|
{
|
|
lex_t lex;
|
|
const char *source;
|
|
json_t *result;
|
|
|
|
if(input == stdin)
|
|
source = "<stdin>";
|
|
else
|
|
source = "<stream>";
|
|
|
|
jsonp_error_init(error, source);
|
|
|
|
if (input == NULL) {
|
|
error_set(error, NULL, "wrong arguments");
|
|
return NULL;
|
|
}
|
|
|
|
if(lex_init(&lex, (get_func)fgetc, flags, input))
|
|
return NULL;
|
|
|
|
result = parse_json(&lex, flags, error);
|
|
|
|
lex_close(&lex);
|
|
return result;
|
|
}
|
|
|
|
static int fd_get_func(int *fd)
|
|
{
|
|
uint8_t c;
|
|
#ifdef HAVE_UNISTD_H
|
|
if (read(*fd, &c, 1) == 1)
|
|
return c;
|
|
#endif
|
|
return EOF;
|
|
}
|
|
|
|
json_t *json_loadfd(int input, size_t flags, json_error_t *error)
|
|
{
|
|
lex_t lex;
|
|
const char *source;
|
|
json_t *result;
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
if(input == STDIN_FILENO)
|
|
source = "<stdin>";
|
|
else
|
|
#endif
|
|
source = "<stream>";
|
|
|
|
jsonp_error_init(error, source);
|
|
|
|
if (input < 0) {
|
|
error_set(error, NULL, "wrong arguments");
|
|
return NULL;
|
|
}
|
|
|
|
if(lex_init(&lex, (get_func)fd_get_func, flags, &input))
|
|
return NULL;
|
|
|
|
result = parse_json(&lex, flags, error);
|
|
|
|
lex_close(&lex);
|
|
return result;
|
|
}
|
|
|
|
json_t *json_load_file(const char *path, size_t flags, json_error_t *error)
|
|
{
|
|
json_t *result;
|
|
FILE *fp;
|
|
|
|
jsonp_error_init(error, path);
|
|
|
|
if (path == NULL) {
|
|
error_set(error, NULL, "wrong arguments");
|
|
return NULL;
|
|
}
|
|
|
|
fp = fopen(path, "rb");
|
|
if(!fp)
|
|
{
|
|
error_set(error, NULL, "unable to open %s: %s",
|
|
path, strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
result = json_loadf(fp, flags, error);
|
|
|
|
fclose(fp);
|
|
return result;
|
|
}
|
|
|
|
#define MAX_BUF_LEN 1024
|
|
|
|
typedef struct
|
|
{
|
|
char data[MAX_BUF_LEN];
|
|
size_t len;
|
|
size_t pos;
|
|
json_load_callback_t callback;
|
|
void *arg;
|
|
} callback_data_t;
|
|
|
|
static int callback_get(void *data)
|
|
{
|
|
char c;
|
|
callback_data_t *stream = data;
|
|
|
|
if(stream->pos >= stream->len) {
|
|
stream->pos = 0;
|
|
stream->len = stream->callback(stream->data, MAX_BUF_LEN, stream->arg);
|
|
if(stream->len == 0 || stream->len == (size_t)-1)
|
|
return EOF;
|
|
}
|
|
|
|
c = stream->data[stream->pos];
|
|
stream->pos++;
|
|
return (unsigned char)c;
|
|
}
|
|
|
|
json_t *json_load_callback(json_load_callback_t callback, void *arg, size_t flags, json_error_t *error)
|
|
{
|
|
lex_t lex;
|
|
json_t *result;
|
|
|
|
callback_data_t stream_data;
|
|
|
|
memset(&stream_data, 0, sizeof(stream_data));
|
|
stream_data.callback = callback;
|
|
stream_data.arg = arg;
|
|
|
|
jsonp_error_init(error, "<callback>");
|
|
|
|
if (callback == NULL) {
|
|
error_set(error, NULL, "wrong arguments");
|
|
return NULL;
|
|
}
|
|
|
|
if(lex_init(&lex, (get_func)callback_get, flags, &stream_data))
|
|
return NULL;
|
|
|
|
result = parse_json(&lex, flags, error);
|
|
|
|
lex_close(&lex);
|
|
return result;
|
|
}
|