diff options
Diffstat (limited to 'sys/lib/string/vsnprintf.c')
-rw-r--r-- | sys/lib/string/vsnprintf.c | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/sys/lib/string/vsnprintf.c b/sys/lib/string/vsnprintf.c deleted file mode 100644 index b8a4faa..0000000 --- a/sys/lib/string/vsnprintf.c +++ /dev/null @@ -1,139 +0,0 @@ -/* - * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of Hyra nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <string.h> -#include <stdarg.h> -#include <sys/types.h> - -static inline void -printc(char *buf, size_t size, size_t *off, char c) -{ - if (*off < size - 1) { - buf[(*off)++] = c; - } - buf[*off] = 0; -} - -static void -printstr(char *buf, size_t size, size_t *off, const char *s) -{ - while (*off < size - 1 && *s != '\0') { - buf[(*off)++] = *(s)++; - } - buf[*off] = 0; -} - -int -snprintf(char *s, size_t size, const char *fmt, ...) -{ - va_list ap; - int ret; - - va_start(ap, fmt); - ret = vsnprintf(s, size, fmt, ap); - va_end(ap); - return ret; -} - -int -vsnprintf(char *s, size_t size, const char *fmt, va_list ap) -{ - size_t tmp_len, num_len, off = 0; - ssize_t num = 0; - char c, c1, num_buf[256] = {0}; - const char *tmp_str; - uint8_t pad_width = 0; - - while (off < (size - 1)) { - while (*fmt && *fmt != '%') { - printc(s, size, &off, *fmt++); - } - if (*(fmt)++ == '\0' || off == size - 1) { - return off; - } - - /* - * Handle a case where we have "%0N". For example: - * "%04d" - */ - if (*fmt == '0') { - ++fmt; - while (*fmt >= '0' && *fmt <= '9') { - pad_width = pad_width * 10 + (*fmt - '0'); - ++fmt; - } - } - - c = *fmt++; - switch (c) { - case 'c': - c1 = (char )va_arg(ap, int); - printc(s, size, &off, c1); - break; - case 'd': - num = va_arg(ap, int); - itoa(num, num_buf, 10); - - if (pad_width > 0) { - num_len = strlen(num_buf); - for (size_t i = num_len; i < pad_width; ++i) - printc(s, size, &off, '0'); - } - printstr(s, size, &off, num_buf); - break; - case 'p': - num = va_arg(ap, uint64_t); - itoa(num, num_buf, 16); - tmp_len = strlen(num_buf); - /* - * Now we pad this. - * - * XXX TODO: This assumes 64-bits, should be - * cleaned up. - */ - for (size_t i = 0; i < 18 - tmp_len; ++i) { - printc(s, size, &off, '0'); - } - printstr(s, size, &off, num_buf + 2); - break; - case 'x': - num = va_arg(ap, uint64_t); - itoa(num, num_buf, 16); - tmp_len = strlen(num_buf); - printstr(s, size, &off, num_buf + 2); - break; - case 's': - tmp_str = va_arg(ap, const char *); - printstr(s, size, &off, tmp_str); - break; - } - } - - return 0; -} |