diff options
author | Lars Hjemli <hjemli@gmail.com> | 2010-11-09 19:57:18 +0100 |
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committer | Lars Hjemli <hjemli@gmail.com> | 2010-11-10 00:22:41 +0100 |
commit | 958a95b37891098133369e835a2ab687e0dfa9dc (patch) | |
tree | 31bcd62973d381b072b91da15528c48c6fc14a41 /vector.c | |
parent | 52558a6d39d52e2b2968b622534b0ffa4da285cb (diff) |
Add vector utility functions
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Diffstat (limited to '')
-rw-r--r-- | vector.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/vector.c b/vector.c new file mode 100644 index 0000000..0863908 --- /dev/null +++ b/vector.c @@ -0,0 +1,38 @@ +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include "vector.h" + +static int grow(struct vector *vec, int gently) +{ + size_t new_alloc; + void *new_data; + + new_alloc = vec->alloc * 3 / 2; + if (!new_alloc) + new_alloc = 8; + new_data = realloc(vec->data, new_alloc * vec->size); + if (!new_data) { + if (gently) + return ENOMEM; + perror("vector.c:grow()"); + exit(1); + } + vec->data = new_data; + vec->alloc = new_alloc; + return 0; +} + +int vector_push(struct vector *vec, const void *data, int gently) +{ + int rc; + + if (vec->count == vec->alloc && (rc = grow(vec, gently))) + return rc; + if (data) + memmove(vec->data + vec->count * vec->size, data, vec->size); + else + memset(vec->data + vec->count * vec->size, 0, vec->size); + vec->count++; + return 0; +} |