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100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/* Copyright (c) 2015-2023, Michael Santos <michael.santos@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "errno.h"
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#include "xmppipe.h"
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static unsigned char rfc3986[256];
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int xmppipe_fmt_init(void) {
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int i = 0;
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for (i = 0; i < 256; i++)
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rfc3986[i] = isalnum(i) || i == '~' || i == '-' || i == '.' || i == '_' ||
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i == '@' || i == '/'
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? i
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: 0;
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return 0;
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}
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char *xmppipe_nfmt_encode(const char *s, size_t len) {
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char *buf = xmppipe_calloc(len * 3 + 1, 1);
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char *p = buf;
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size_t i = 0;
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for (i = 0; i < len; i++) {
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unsigned char c = s[i];
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if (rfc3986[c]) {
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*p = c;
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p++;
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} else {
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p += sprintf(p, "%%%02X", c);
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}
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}
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return buf;
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}
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char *xmppipe_fmt_encode(const char *s) {
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return xmppipe_nfmt_encode(s, strlen(s));
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}
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char *xmppipe_nfmt_decode(const char *s, size_t len) {
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char *buf;
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char *p;
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size_t i = 0;
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char fmt[3] = {0};
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char *endptr;
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buf = xmppipe_calloc(len + 1, 1);
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p = buf;
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for (i = 0; i < len; i++) {
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unsigned char c = s[i];
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if (c == '%') {
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unsigned char n = 0;
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if (i + 2 > len)
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goto XMPPIPE_ERR;
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(void)memcpy(fmt, s + i + 1, 2);
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errno = 0;
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n = strtol(fmt, &endptr, 16);
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if ((errno != 0) || (endptr == fmt))
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goto XMPPIPE_ERR;
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*p++ = n;
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i += 2;
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} else {
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*p++ = c;
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}
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}
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return buf;
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XMPPIPE_ERR:
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free(buf);
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return NULL;
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}
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char *xmppipe_fmt_decode(const char *s) {
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if (s == NULL)
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return NULL;
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return xmppipe_nfmt_decode(s, strlen(s));
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}
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