diff options
author | default <nobody@localhost> | 2023-05-17 10:08:57 +0200 |
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committer | default <nobody@localhost> | 2023-05-17 10:08:57 +0200 |
commit | 970ad7a54041af7aa95e4466912a59df13b97282 (patch) | |
tree | c583a83fa9fb412ed81b0b1b17c48222f058d826 /xs_encdec.h | |
parent | 7f1b87a6b69055e5f0a3dcc890f9fecd45466a90 (diff) |
Got rid of xs_encdec.h.
Diffstat (limited to 'xs_encdec.h')
-rw-r--r-- | xs_encdec.h | 155 |
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 */ |