blob: 5cca2cde7afa07056d62d7bf0360f7ca383f223b [file] [log] [blame]
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cn-cbor/cn-cbor.h>
#include "json.h"
#ifdef USE_CBOR_CONTEXT
extern cn_cbor_context * allocator;
#define CBOR_CONTEXT_PARAM , allocator
#define CBOR_CONTEXT_PARAM_COMMA allocator,
#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 * node = NULL;
cn_cbor * parent = NULL;
cn_cbor * root = NULL;
for (; ib < cch; ib++) {
node = NULL;
ch = rgch[ib];
switch (ch) {
case '{':
node = cn_cbor_map_create(CBOR_CONTEXT_PARAM_COMMA NULL);
break;
case '}':
parent = parent->parent;
break;
case '[':
node = cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA NULL);
break;
case ']':
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;
default:
error:
fprintf(stderr, "Parse failure @ '%s'\n", &rgch[ib]);
break;
}
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 = malloc(8 * 1024);
FILE * fp = fopen(fileName, "r");
if (fp == NULL) {
fprintf(stderr, "Cannot open file '%s'\n", fileName);
exit(1);
}
fprintf(stderr, "Processing '%s'\n", fileName);
cch = (int) fread(rgch, 1, 8*1024, fp);
fclose(fp);
return ParseString(rgch, 0, cch);
}
extern 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 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) return NULL;
for (unsigned int i = 0, j = 0; i < input_length;) {
uint32_t sextet_a = data[i] == '=' ? 0 & i++ : decoding_table[(int) data[i++]];
uint32_t sextet_b = data[i] == '=' ? 0 & i++ : decoding_table[(int) data[i++]];
uint32_t sextet_c = data[i] == '=' ? 0 & i++ : decoding_table[(int) data[i++]];
uint32_t sextet_d = data[i] == '=' ? 0 & i++ : 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;
}
void build_decoding_table() {
decoding_table = malloc(256);
for (int i = 0; i < 64; i++)
decoding_table[(int) encoding_table[i]] = (char) i;
}
void base64_cleanup() {
free(decoding_table);
}