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-rw-r--r--xs_encdec.h155
1 files changed, 0 insertions, 155 deletions
diff --git a/xs_encdec.h b/xs_encdec.h
deleted file mode 100644
index 14cb36e..0000000
--- a/xs_encdec.h
+++ /dev/null
@@ -1,155 +0,0 @@
-/* copyright (c) 2022 - 2023 grunfink / MIT license */
-
-#ifndef _XS_ENCDEC_H
-
-#define _XS_ENCDEC_H
-
- xs_str *xs_base64_enc(const xs_val *data, int sz);
- xs_val *xs_base64_dec(const xs_str *data, int *size);
- int xs_is_base64(const char *str);
-
-
-#ifdef XS_IMPLEMENTATION
-
-/** base64 */
-
-static char *xs_b64_tbl = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
- "abcdefghijklmnopqrstuvwxyz"
- "0123456789+/=";
-
-xs_str *xs_base64_enc_tbl(const xs_val *data, int sz, const char *b64_tbl)
-/* encodes data to base64 using a table */
-{
- xs_str *s;
- unsigned char *p;
- char *i;
- int bsz, n;
-
- bsz = ((sz + 3 - 1) / 3) * 4;
- i = s = xs_realloc(NULL, _xs_blk_size(bsz + 1));
- p = (unsigned char *)data;
-
- for (n = 0; n < sz; n += 3) {
- int l = sz - n;
-
- if (l == 1) {
- *i++ = b64_tbl[(p[n] >> 2) & 0x3f];
- *i++ = b64_tbl[(p[n] << 4) & 0x3f];
- *i++ = '=';
- *i++ = '=';
- }
- else
- if (l == 2) {
- *i++ = b64_tbl[(p[n] >> 2) & 0x3f];
- *i++ = b64_tbl[(p[n] << 4 | p[n + 1] >> 4) & 0x3f];
- *i++ = b64_tbl[(p[n + 1] << 2) & 0x3f];
- *i++ = '=';
- }
- else {
- *i++ = b64_tbl[(p[n] >> 2) & 0x3f];
- *i++ = b64_tbl[(p[n] << 4 | p[n + 1] >> 4) & 0x3f];
- *i++ = b64_tbl[(p[n + 1] << 2 | p[n + 2] >> 6) & 0x3f];
- *i++ = b64_tbl[(p[n + 2]) & 0x3f];
- }
- }
-
- *i = '\0';
-
- return s;
-}
-
-
-xs_str *xs_base64_enc(const xs_val *data, int sz)
-/* encodes data to base64 */
-{
- return xs_base64_enc_tbl(data, sz, xs_b64_tbl);
-}
-
-
-xs_val *xs_base64_dec_tbl(const xs_str *data, int *size, const char *b64_tbl)
-/* decodes data from base64 using a table */
-{
- xs_val *s = NULL;
- int sz = 0;
- char *p;
-
- p = (char *)data;
-
- /* size of data must be a multiple of 4 */
- if (strlen(p) % 4)
- return NULL;
-
- for (p = (char *)data; *p; p += 4) {
- int cs[4];
- int n;
- unsigned char tmp[3];
-
- for (n = 0; n < 4; n++) {
- char *ss = strchr(b64_tbl, p[n]);
-
- if (ss == NULL) {
- /* not a base64 char */
- return xs_free(s);
- }
-
- cs[n] = ss - b64_tbl;
- }
-
- n = 0;
-
- /* first byte */
- tmp[n++] = cs[0] << 2 | ((cs[1] >> 4) & 0x0f);
-
- /* second byte */
- if (cs[2] != 64)
- tmp[n++] = cs[1] << 4 | ((cs[2] >> 2) & 0x3f);
-
- /* third byte */
- if (cs[3] != 64)
- tmp[n++] = cs[2] << 6 | (cs[3] & 0x3f);
-
- /* must be done manually because data can be pure binary */
- s = xs_realloc(s, _xs_blk_size(sz + n));
- memcpy(s + sz, tmp, n);
- sz += n;
- }
-
- /* asciiz it to use it as a string */
- s = xs_realloc(s, _xs_blk_size(sz + 1));
- s[sz] = '\0';
-
- *size = sz;
-
- return s;
-}
-
-
-xs_val *xs_base64_dec(const xs_str *data, int *size)
-/* decodes data from base64 */
-{
- return xs_base64_dec_tbl(data, size, xs_b64_tbl);
-}
-
-
-int xs_is_base64_tbl(const char *str, const char *b64_tbl)
-/* returns 1 if str is a base64 string, with table */
-{
- while (*str) {
- if (strchr(b64_tbl, *str++) == NULL)
- return 0;
- }
-
- return 1;
-}
-
-
-int xs_is_base64(const char *str)
-/* returns 1 if str is a base64 string */
-{
- return xs_is_base64_tbl(str, xs_b64_tbl);
-}
-
-
-#endif /* XS_IMPLEMENTATION */
-
-#endif /* _XS_ENCDEC_H */