blob: 80dda58613c8dd725b9de215e04b1dc2036d66a3 [file] [log] [blame]
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <cn-cbor/cn-cbor.h>
#include "json.h"
#ifdef USE_CBOR_CONTEXT
extern cn_cbor_context *context;
#define CBOR_CONTEXT_PARAM , context
#define CBOR_CONTEXT_PARAM_COMMA context,
#else
#define CBOR_CONTEXT_PARAM
#define CBOR_CONTEXT_PARAM_COMMA
#endif
const cn_cbor *ParseString(char *rgch, int ib, int cch)
{
char ch;
int ib2;
cn_cbor *parent = NULL;
cn_cbor *root = NULL;
for (; ib < cch; ib++) {
cn_cbor *node = NULL;
ch = rgch[ib];
switch (ch) {
case '{':
node = cn_cbor_map_create(CBOR_CONTEXT_PARAM_COMMA NULL);
break;
case '[':
node = cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA NULL);
break;
case '}':
case ']':
if (parent == NULL) {
fprintf(stderr, "Parse failure @ '%s'\n", &rgch[ib]);
return NULL;
}
parent = parent->parent;
break;
case ' ':
case '\r':
case '\n':
case ':':
case ',':
break;
case '"':
for (ib2 = ib + 1; ib2 < cch; ib2++) {
if (rgch[ib2] == '"') {
break;
}
}
rgch[ib2] = 0;
node = cn_cbor_string_create(
&rgch[ib + 1], CBOR_CONTEXT_PARAM_COMMA NULL);
// rgch[ib2] = '"';
ib = ib2;
break;
case 't':
if (strncmp(&rgch[ib], "true", 4) != 0) {
goto error;
}
node =
cn_cbor_data_create(NULL, 0, CBOR_CONTEXT_PARAM_COMMA NULL);
node->type = CN_CBOR_TRUE;
ib += 3;
break;
case 'f':
if (strncmp(&rgch[ib], "false", 5) != 0) {
goto error;
}
node =
cn_cbor_data_create(NULL, 0, CBOR_CONTEXT_PARAM_COMMA NULL);
node->type = CN_CBOR_FALSE;
ib += 4;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '-':
node = cn_cbor_int_create(
atol(&rgch[ib]), CBOR_CONTEXT_PARAM_COMMA NULL);
if (rgch[ib] == '-') {
ib++;
}
while (isdigit(rgch[ib])) {
ib++;
}
ib--;
break;
default:
error:
fprintf(stderr, "Parse failure @ '%s'\n", &rgch[ib]);
return NULL;
}
if ((node != NULL) && (parent != NULL)) {
node->parent = parent;
if (parent->last_child != NULL) {
parent->last_child->next = node;
parent->last_child = node;
}
else {
parent->first_child = node;
}
parent->last_child = node;
parent->length++;
if ((node->type == CN_CBOR_MAP) || (node->type == CN_CBOR_ARRAY)) {
parent = node;
}
}
if (parent == NULL) {
parent = node;
if (root == NULL) {
root = node;
}
}
}
return root;
}
const cn_cbor *ParseJson(const char *fileName)
{
int cch;
char *rgch;
FILE *fp = fopen(fileName, "r");
if (fp == NULL) {
fprintf(stderr, "Cannot open file '%s'\n", fileName);
return NULL;
}
rgch = malloc(8 * 1024);
cch = (int)fread(rgch, 1, 8 * 1024, fp);
fclose(fp);
return ParseString(rgch, 0, cch);
}
static void build_decoding_table();
static char encoding_table[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1',
'2', '3', '4', '5', '6', '7', '8', '9', '-', '_'};
static unsigned char *decoding_table = NULL;
static int mod_table[] = {0, 2, 1};
char *base64_encode(const unsigned char *data,
size_t input_length,
size_t *output_length)
{
*output_length = 4 * ((input_length + 2) / 3);
char *encoded_data = malloc(*output_length);
if (encoded_data == NULL) {
return NULL;
}
for (size_t i = 0, j = 0; i < input_length;) {
uint32_t octet_a = i < input_length ? (unsigned char)data[i++] : 0;
uint32_t octet_b = i < input_length ? (unsigned char)data[i++] : 0;
uint32_t octet_c = i < input_length ? (unsigned char)data[i++] : 0;
uint32_t triple = (octet_a << 0x10) + (octet_b << 0x08) + octet_c;
encoded_data[j++] = encoding_table[(triple >> 3 * 6) & 0x3F];
encoded_data[j++] = encoding_table[(triple >> 2 * 6) & 0x3F];
encoded_data[j++] = encoding_table[(triple >> 1 * 6) & 0x3F];
encoded_data[j++] = encoding_table[(triple >> 0 * 6) & 0x3F];
}
for (int i = 0; i < mod_table[input_length % 3]; i++) {
encoded_data[*output_length - 1 - i] = '=';
}
return encoded_data;
}
unsigned char *base64_decode(const char *data,
size_t input_length,
size_t *output_length)
{
char *p = NULL;
if (decoding_table == NULL) {
build_decoding_table();
}
if (input_length % 4 != 0) {
int c = 4 - (input_length % 4);
p = malloc(input_length + c);
memcpy(p, data, input_length);
memcpy(p + input_length, "====", c);
input_length += c;
data = p;
}
*output_length = input_length / 4 * 3;
if (data[input_length - 1] == '=') {
(*output_length)--;
}
if (data[input_length - 2] == '=') {
(*output_length)--;
}
unsigned char *decoded_data = malloc(*output_length);
if (decoded_data == NULL) {
if (p != NULL) {
free(p);
}
return NULL;
}
for (unsigned int i = 0, j = 0; i < input_length;) {
uint32_t sextet_a =
data[i] == '=' ? 0 & i++ : (unsigned)decoding_table[(int)data[i++]];
uint32_t sextet_b =
data[i] == '=' ? 0 & i++ : (unsigned)decoding_table[(int)data[i++]];
uint32_t sextet_c =
data[i] == '=' ? 0 & i++ : (unsigned)decoding_table[(int)data[i++]];
uint32_t sextet_d =
data[i] == '=' ? 0 & i++ : (unsigned)decoding_table[(int)data[i++]];
uint32_t triple = (sextet_a << 3 * 6) + (sextet_b << 2 * 6) +
(sextet_c << 1 * 6) + (sextet_d << 0 * 6);
if (j < *output_length) {
decoded_data[j++] = (triple >> 2 * 8) & 0xFF;
}
if (j < *output_length) {
decoded_data[j++] = (triple >> 1 * 8) & 0xFF;
}
if (j < *output_length) {
decoded_data[j++] = (triple >> 0 * 8) & 0xFF;
}
}
free(p);
return decoded_data;
}
static void build_decoding_table()
{
decoding_table = malloc(256);
for (int i = 0; i < 64; i++) {
decoding_table[(int)encoding_table[i]] = (unsigned char)i;
}
}
void base64_cleanup()
{
free(decoding_table);
}
unsigned char *hex_decode(const char *data,
size_t input_length,
size_t *output_length)
{
if (input_length % 2 != 0) {
return NULL;
}
*output_length = input_length / 2;
unsigned char *decoded_data = malloc(*output_length);
if (decoded_data == NULL) {
return NULL;
}
for (unsigned int i = 0, j = 0; i < input_length; i++) {
int c;
if ('0' <= data[i] && data[i] <= '9') {
c = data[i] - '0';
}
else if ('A' <= data[i] && data[i] <= 'F') {
c = data[i] - 'A' + 10;
}
else if ('a' <= data[i] && data[i] <= 'f') {
c = data[i] - 'a' + 10;
}
else {
return NULL;
}
if ((i & 0x1) == 0) {
decoded_data[j] = ((unsigned char)c << 4);
}
else {
decoded_data[j++] |= (unsigned char)c;
}
}
return decoded_data;
}