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Diffstat (limited to 'pls.c')
| -rw-r--r-- | pls.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/pls.c b/pls.c deleted file mode 100644 index b724033..0000000 --- a/pls.c +++ /dev/null @@ -1,186 +0,0 @@ -/* Copyright (C) 2018 C. McEnroe <june@causal.agency> - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <errno.h> -#include <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <wchar.h> - -#include "chat.h" - -wchar_t *wcsnchr(const wchar_t *wcs, size_t len, wchar_t chr) { - len = wcsnlen(wcs, len); - for (size_t i = 0; i < len; ++i) { - if (wcs[i] == chr) return (wchar_t *)&wcs[i]; - } - return NULL; -} - -wchar_t *wcsnrchr(const wchar_t *wcs, size_t len, wchar_t chr) { - len = wcsnlen(wcs, len); - for (size_t i = len - 1; i < len; --i) { - if (wcs[i] == chr) return (wchar_t *)&wcs[i]; - } - return NULL; -} - -wchar_t *ambstowcs(const char *src) { - size_t len = mbsrtowcs(NULL, &src, 0, NULL); - if (len == (size_t)-1) return NULL; - - wchar_t *dst = malloc(sizeof(*dst) * (1 + len)); - if (!dst) return NULL; - - len = mbsrtowcs(dst, &src, len, NULL); - if (len == (size_t)-1) { - free(dst); - return NULL; - } - - dst[len] = L'\0'; - return dst; -} - -char *awcstombs(const wchar_t *src) { - size_t len = wcsrtombs(NULL, &src, 0, NULL); - if (len == (size_t)-1) return NULL; - - char *dst = malloc(sizeof(*dst) * (1 + len)); - if (!dst) return NULL; - - len = wcsrtombs(dst, &src, len, NULL); - if (len == (size_t)-1) { - free(dst); - return NULL; - } - - dst[len] = '\0'; - return dst; -} - -char *awcsntombs(const wchar_t *src, size_t nwc) { - size_t len = wcsnrtombs(NULL, &src, nwc, 0, NULL); - if (len == (size_t)-1) return NULL; - - char *dst = malloc(sizeof(*dst) * (1 + len)); - if (!dst) return NULL; - - len = wcsnrtombs(dst, &src, nwc, len, NULL); - if (len == (size_t)-1) { - free(dst); - return NULL; - } - - dst[len] = '\0'; - return dst; -} - -// From <https://en.cppreference.com/w/c/io/fwprintf#Notes>: -// -// While narrow strings provide snprintf, which makes it possible to determine -// the required output buffer size, there is no equivalent for wide strings -// (until C11's snwprintf_s), and in order to determine the buffer size, the -// program may need to call swprintf, check the result value, and reallocate a -// larger buffer, trying again until successful. -// -// snwprintf_s, unlike swprintf_s, will truncate the result to fit within the -// array pointed to by buffer, even though truncation is treated as an error by -// most bounds-checked functions. -int vaswprintf(wchar_t **ret, const wchar_t *format, va_list ap) { - *ret = NULL; - - for (size_t cap = 2 * wcslen(format);; cap *= 2) { - wchar_t *buf = realloc(*ret, sizeof(*buf) * (1 + cap)); - if (!buf) goto fail; - *ret = buf; - - va_list _ap; - va_copy(_ap, ap); - errno = EOVERFLOW; // vswprintf may not set errno. - int len = vswprintf(*ret, 1 + cap, format, _ap); - va_end(_ap); - - if (len >= 0) return len; - if (errno != EOVERFLOW) goto fail; - } - -fail: - free(*ret); - *ret = NULL; - return -1; -} - -int aswprintf(wchar_t **ret, const wchar_t *format, ...) { - va_list ap; - va_start(ap, format); - int n = vaswprintf(ret, format, ap); - va_end(ap); - return n; -} - -static const char Base64[64] = { - "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" -}; - -size_t base64Size(size_t len) { - return 1 + (len + 2) / 3 * 4; -} - -void base64(char *dst, const byte *src, size_t len) { - size_t i = 0; - while (len > 2) { - dst[i++] = Base64[0x3F & (src[0] >> 2)]; - dst[i++] = Base64[0x3F & (src[0] << 4 | src[1] >> 4)]; - dst[i++] = Base64[0x3F & (src[1] << 2 | src[2] >> 6)]; - dst[i++] = Base64[0x3F & src[2]]; - src += 3; - len -= 3; - } - if (len) { - dst[i++] = Base64[0x3F & (src[0] >> 2)]; - if (len > 1) { - dst[i++] = Base64[0x3F & (src[0] << 4 | src[1] >> 4)]; - dst[i++] = Base64[0x3F & (src[1] << 2)]; - } else { - dst[i++] = Base64[0x3F & (src[0] << 4)]; - dst[i++] = '='; - } - dst[i++] = '='; - } - dst[i] = '\0'; -} - -#ifdef TEST -#include <assert.h> -#include <string.h> - -int main() { - assert(5 == base64Size(1)); - assert(5 == base64Size(2)); - assert(5 == base64Size(3)); - assert(9 == base64Size(4)); - - char b64[base64Size(3)]; - assert((base64(b64, (byte *)"cat", 3), !strcmp("Y2F0", b64))); - assert((base64(b64, (byte *)"ca", 2), !strcmp("Y2E=", b64))); - assert((base64(b64, (byte *)"c", 1), !strcmp("Yw==", b64))); - - assert((base64(b64, (byte *)"\xFF\x00\xFF", 3), !strcmp("/wD/", b64))); - assert((base64(b64, (byte *)"\x00\xFF\x00", 3), !strcmp("AP8A", b64))); -} - -#endif |