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Diffstat (limited to '')
-rw-r--r-- | src/macros.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/macros.h b/src/macros.h new file mode 100644 index 0000000..298a41a --- /dev/null +++ b/src/macros.h @@ -0,0 +1,57 @@ +/** + * Copyright © 2016 Mattias Andrée <maandree@member.fsf.org> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#include <string.h> +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> + + + +#define try(...) do { if (!(__VA_ARGS__)) goto fail; } while (0) +#define t(...) do { if (__VA_ARGS__) goto fail; } while (0) +#define CLEANUP(...) do { int cleanup__ = errno; __VA_ARGS__; errno = cleanup__; } while (0) + +#define xstrdup(outp, ...) \ +do { \ + const char *xstrdup__ = (__VA_ARGS__); \ + if (xstrdup__) \ + try (*(outp) = strdup(xstrdup__)); \ + else \ + *(outp) = NULL; \ +} while (0) + +#define xpread(fd, buf, len, off) t (pread(fd, buf, len, off) < (ssize_t)(len)) +#define xpwrite(fd, buf, len, off) t (pwrite(fd, buf, len, off) < (ssize_t)(len)) +#define xread(fd, buf, len) t (read(fd, buf, len) < (ssize_t)(len)) +#define xwrite(fd, buf, len) t (write(fd, buf, len) < (ssize_t)(len)) + +#define xcalloc(outp, num) try (*(outp) = calloc(num, sizeof(**(outp)))) +#define xmalloc(outp, num) try (*(outp) = malloc((num) * sizeof(**(outp)))) +#define xrealloc(outp, num) \ +do { \ + size_t n__ = (num); \ + void *new__ = realloc(*(outp), n__ * sizeof(**(outp))); \ + t (n__ && !new__); \ + *(outp) = new__; \ +} while (0) + +#define SHRINK(outp, num) \ +do { \ + void *new__ = realloc(*(outp), (num) * sizeof(**(outp))); \ + if (new__) *(outp) = new__; \ +} while (0) + |