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/*
* fy-ctype.c - ctype utilities
*
* Copyright (c) 2019 Pantelis Antoniou <pantelis.antoniou@konsulko.com>
*
* SPDX-License-Identifier: MIT
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <libfyaml.h>
#include "fy-ctype.h"
const char *fy_uri_esc(const char *s, size_t len, uint8_t *code, int *code_len)
{
const char *e = s + len;
int j, k, width;
uint8_t octet;
char c;
width = 0;
k = 0;
do {
/* check for enough space for %XX */
if ((e - s) < 3)
return NULL;
/* if more than one run, expect '%' */
if (s[0] != '%')
return NULL;
octet = 0;
for (j = 0; j < 2; j++) {
c = s[1 + j];
octet <<= 4;
if (c >= '0' && c <= '9')
octet |= c - '0';
else if (c >= 'a' && c <= 'f')
octet |= 10 + c - 'a';
else
octet |= 10 + c - 'A';
}
if (!width) {
width = fy_utf8_width_by_first_octet(octet);
if (!width)
return NULL;
k = 0;
}
if (k >= *code_len)
return NULL;
code[k++] = octet;
/* skip over the 3 character escape */
s += 3;
} while (--width > 0);
*code_len = k;
return s;
}
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