mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-25 09:46:13 +08:00
299 lines
8.6 KiB
C
299 lines
8.6 KiB
C
/*
|
|
* Copyright (c) 2012 Rogerz Zhang <rogerz.zhang@gmail.com>
|
|
*
|
|
* Jansson is free software; you can redistribute it and/or modify
|
|
* it under the terms of the MIT license. See LICENSE for details.
|
|
*
|
|
* source here https://github.com/rogerz/jansson/blob/json_path/src/path.c
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#include "jansson.h"
|
|
#include "jansson_path.h"
|
|
|
|
////// memory.c private functions
|
|
|
|
/* C89 allows these to be macros */
|
|
#undef malloc
|
|
#undef free
|
|
|
|
/* memory function pointers */
|
|
static json_malloc_t do_malloc = malloc;
|
|
static json_free_t do_free = free;
|
|
|
|
static void *jsonp_malloc(size_t size) {
|
|
if (!size)
|
|
return NULL;
|
|
|
|
return (*do_malloc)(size);
|
|
}
|
|
|
|
static void jsonp_free(void *ptr) {
|
|
if (!ptr)
|
|
return;
|
|
|
|
(*do_free)(ptr);
|
|
}
|
|
|
|
static char *jsonp_strndup(const char *str, size_t len) {
|
|
char *new_str = jsonp_malloc(len + 1);
|
|
if (!new_str)
|
|
return NULL;
|
|
|
|
memcpy(new_str, str, len);
|
|
new_str[len] = '\0';
|
|
return new_str;
|
|
}
|
|
|
|
static char *jsonp_strdup(const char *str) {
|
|
return jsonp_strndup(str, strlen(str));
|
|
}
|
|
|
|
////// error.c private functions
|
|
|
|
static void jsonp_error_set_source(json_error_t *error, const char *source) {
|
|
size_t length;
|
|
|
|
if (!error || !source)
|
|
return;
|
|
|
|
length = strlen(source);
|
|
if (length < JSON_ERROR_SOURCE_LENGTH) {
|
|
strncpy(error->source, source, JSON_ERROR_SOURCE_LENGTH - 1);
|
|
} else {
|
|
size_t extra = length - JSON_ERROR_SOURCE_LENGTH + 4;
|
|
memcpy(error->source, "...", 3);
|
|
strncpy(error->source + 3, source + extra, length - extra + 1);
|
|
}
|
|
}
|
|
|
|
static void jsonp_error_init(json_error_t *error, const char *source) {
|
|
if (error) {
|
|
error->text[0] = '\0';
|
|
error->line = -1;
|
|
error->column = -1;
|
|
error->position = 0;
|
|
if (source)
|
|
jsonp_error_set_source(error, source);
|
|
else
|
|
error->source[0] = '\0';
|
|
}
|
|
}
|
|
|
|
static void jsonp_error_vset(json_error_t *error, int line, int column,
|
|
size_t position, enum json_error_code code,
|
|
const char *msg, va_list ap) {
|
|
if (!error)
|
|
return;
|
|
|
|
if (error->text[0] != '\0') {
|
|
/* error already set */
|
|
return;
|
|
}
|
|
|
|
error->line = line;
|
|
error->column = column;
|
|
error->position = (int)position;
|
|
|
|
vsnprintf(error->text, JSON_ERROR_TEXT_LENGTH - 1, msg, ap);
|
|
error->text[JSON_ERROR_TEXT_LENGTH - 2] = '\0';
|
|
error->text[JSON_ERROR_TEXT_LENGTH - 1] = code;
|
|
}
|
|
|
|
static void jsonp_error_set(json_error_t *error, int line, int column,
|
|
size_t position, enum json_error_code code,
|
|
const char *msg, ...) {
|
|
va_list ap;
|
|
va_start(ap, msg);
|
|
jsonp_error_vset(error, line, column, position, code, msg, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
|
|
// original path.c from jansson fork
|
|
|
|
json_t *json_path_get(const json_t *json, const char *path) {
|
|
static const char root_chr = '$', array_open = '[';
|
|
static const char *path_delims = ".[", *array_close = "]";
|
|
const json_t *cursor;
|
|
char *token, *buf, *peek, *endptr, delim = '\0';
|
|
const char *expect;
|
|
|
|
if (!json || !path || path[0] != root_chr)
|
|
return NULL;
|
|
else
|
|
buf = jsonp_strdup(path);
|
|
|
|
peek = buf + 1;
|
|
cursor = json;
|
|
token = NULL;
|
|
expect = path_delims;
|
|
|
|
while (peek && *peek && cursor) {
|
|
char *last_peek = peek;
|
|
peek = strpbrk(peek, expect);
|
|
if (peek) {
|
|
if (!token && peek != last_peek)
|
|
goto fail;
|
|
delim = *peek;
|
|
*peek++ = '\0';
|
|
} else if (expect != path_delims || !token) {
|
|
goto fail;
|
|
}
|
|
|
|
if (expect == path_delims) {
|
|
if (token) {
|
|
cursor = json_object_get(cursor, token);
|
|
}
|
|
expect = (delim == array_open ? array_close : path_delims);
|
|
token = peek;
|
|
} else if (expect == array_close) {
|
|
size_t index = strtol(token, &endptr, 0);
|
|
if (*endptr)
|
|
goto fail;
|
|
cursor = json_array_get(cursor, index);
|
|
token = NULL;
|
|
expect = path_delims;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
jsonp_free(buf);
|
|
return (json_t *)cursor;
|
|
fail:
|
|
jsonp_free(buf);
|
|
return NULL;
|
|
}
|
|
|
|
int json_path_set_new(json_t *json, const char *path, json_t *value, size_t flags, json_error_t *error) {
|
|
static const char root_chr = '$', array_open = '[', object_delim = '.';
|
|
static const char *const path_delims = ".[", *array_close = "]";
|
|
|
|
json_t *cursor, *parent = NULL;
|
|
char *token, *buf = NULL, *peek, delim = '\0';
|
|
const char *expect;
|
|
int index_saved = -1;
|
|
|
|
jsonp_error_init(error, "<path>");
|
|
|
|
if (!json || !path || flags || !value) {
|
|
jsonp_error_set(error, -1, -1, 0, json_error_invalid_argument, "invalid argument");
|
|
goto fail;
|
|
} else {
|
|
buf = jsonp_strdup(path);
|
|
}
|
|
|
|
if (buf[0] != root_chr) {
|
|
jsonp_error_set(error, -1, -1, 0, json_error_invalid_format, "path should start with $");
|
|
goto fail;
|
|
}
|
|
|
|
peek = buf + 1;
|
|
cursor = json;
|
|
token = NULL;
|
|
expect = path_delims;
|
|
|
|
while (peek && *peek && cursor) {
|
|
char *last_peek = peek;
|
|
peek = strpbrk(last_peek, expect);
|
|
|
|
if (peek) {
|
|
if (!token && peek != last_peek) {
|
|
jsonp_error_set(error, -1, -1, last_peek - buf, json_error_invalid_format, "unexpected trailing chars");
|
|
goto fail;
|
|
}
|
|
delim = *peek;
|
|
*peek++ = '\0';
|
|
} else { // end of path
|
|
if (expect == path_delims) {
|
|
break;
|
|
} else {
|
|
jsonp_error_set(error, -1, -1, last_peek - buf, json_error_invalid_format, "missing ']'?");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (expect == path_delims) {
|
|
if (token) {
|
|
if (token[0] == '\0') {
|
|
jsonp_error_set(error, -1, -1, peek - buf, json_error_invalid_format, "empty token");
|
|
goto fail;
|
|
}
|
|
|
|
parent = cursor;
|
|
cursor = json_object_get(parent, token);
|
|
|
|
if (!cursor) {
|
|
if (!json_is_object(parent)) {
|
|
jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "object expected");
|
|
goto fail;
|
|
}
|
|
if (delim == object_delim) {
|
|
cursor = json_object();
|
|
json_object_set_new(parent, token, cursor);
|
|
} else {
|
|
jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "new array is not allowed");
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
expect = (delim == array_open ? array_close : path_delims);
|
|
token = peek;
|
|
} else if (expect == array_close) {
|
|
char *endptr;
|
|
size_t index;
|
|
|
|
parent = cursor;
|
|
if (!json_is_array(parent)) {
|
|
jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "array expected");
|
|
goto fail;
|
|
}
|
|
index = strtol(token, &endptr, 0);
|
|
if (*endptr) {
|
|
jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "invalid array index");
|
|
goto fail;
|
|
}
|
|
cursor = json_array_get(parent, index);
|
|
if (!cursor) {
|
|
jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "array index out of bound");
|
|
goto fail;
|
|
}
|
|
index_saved = index;
|
|
token = NULL;
|
|
expect = path_delims;
|
|
} else {
|
|
assert(1);
|
|
jsonp_error_set(error, -1, -1, peek - buf, json_error_unknown, "unexpected error in path move");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (token) {
|
|
if (json_is_object(cursor)) {
|
|
json_object_set(cursor, token, value);
|
|
} else {
|
|
jsonp_error_set(error, -1, -1, peek - buf, json_error_item_not_found, "object expected");
|
|
goto fail;
|
|
}
|
|
cursor = json_object_get(cursor, token);
|
|
} else if (index_saved != -1 && json_is_array(parent)) {
|
|
json_array_set(parent, index_saved, value);
|
|
cursor = json_array_get(parent, index_saved);
|
|
} else {
|
|
jsonp_error_set(error, -1, -1, 0, json_error_item_not_found, "invalid path");
|
|
goto fail;
|
|
}
|
|
|
|
json_decref(value);
|
|
jsonp_free(buf);
|
|
return 0;
|
|
|
|
fail:
|
|
json_decref(value);
|
|
jsonp_free(buf);
|
|
return -1;
|
|
}
|