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Diffstat (limited to 'src/libbasic/src/strxcpyx.c')
-rw-r--r-- | src/libbasic/src/strxcpyx.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/libbasic/src/strxcpyx.c b/src/libbasic/src/strxcpyx.c new file mode 100644 index 0000000000..aaf11d21f6 --- /dev/null +++ b/src/libbasic/src/strxcpyx.c @@ -0,0 +1,100 @@ +/*** + This file is part of systemd. + + Copyright 2013 Kay Sievers + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +/* + * Concatenates/copies strings. In any case, terminates in all cases + * with '\0' * and moves the @dest pointer forward to the added '\0'. + * Returns the * remaining size, and 0 if the string was truncated. + */ + +#include <stdarg.h> +#include <stdio.h> +#include <string.h> + +#include "strxcpyx.h" + +size_t strpcpy(char **dest, size_t size, const char *src) { + size_t len; + + len = strlen(src); + if (len >= size) { + if (size > 1) + *dest = mempcpy(*dest, src, size-1); + size = 0; + } else { + if (len > 0) { + *dest = mempcpy(*dest, src, len); + size -= len; + } + } + *dest[0] = '\0'; + return size; +} + +size_t strpcpyf(char **dest, size_t size, const char *src, ...) { + va_list va; + int i; + + va_start(va, src); + i = vsnprintf(*dest, size, src, va); + if (i < (int)size) { + *dest += i; + size -= i; + } else { + *dest += size; + size = 0; + } + va_end(va); + *dest[0] = '\0'; + return size; +} + +size_t strpcpyl(char **dest, size_t size, const char *src, ...) { + va_list va; + + va_start(va, src); + do { + size = strpcpy(dest, size, src); + src = va_arg(va, char *); + } while (src != NULL); + va_end(va); + return size; +} + +size_t strscpy(char *dest, size_t size, const char *src) { + char *s; + + s = dest; + return strpcpy(&s, size, src); +} + +size_t strscpyl(char *dest, size_t size, const char *src, ...) { + va_list va; + char *s; + + va_start(va, src); + s = dest; + do { + size = strpcpy(&s, size, src); + src = va_arg(va, char *); + } while (src != NULL); + va_end(va); + + return size; +} |