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author | Yaroslav de la Peña Smirnov <yps@yaroslavps.com> | 2022-03-24 01:04:02 +0300 |
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committer | Yaroslav de la Peña Smirnov <yps@yaroslavps.com> | 2022-03-24 01:04:02 +0300 |
commit | 5d66c96a190a396a1535c89bed4e33c2a005fe8d (patch) | |
tree | 36a681d8cf226cf30f06b2764c008077d9655dc7 /src/slice.c | |
download | roscha-5d66c96a190a396a1535c89bed4e33c2a005fe8d.tar.gz roscha-5d66c96a190a396a1535c89bed4e33c2a005fe8d.zip |
Initial commit
Basically it works, just needs some polishing and maybe a couple of
features that I could actually use.
Also probably better docs. Not sure if it will be of use to anybody
besides me.
Diffstat (limited to 'src/slice.c')
-rw-r--r-- | src/slice.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/slice.c b/src/slice.c new file mode 100644 index 0000000..5d89d9e --- /dev/null +++ b/src/slice.c @@ -0,0 +1,63 @@ +#include "slice.h" + +#include <stdlib.h> +#include <string.h> + +struct slice +slice_new(const char *str, size_t start, size_t end) +{ + struct slice slice = { + .str = str, + .start = start, + .end = end, + }; + + return slice; +} + +void +slice_set(struct slice *slice, const char *str, size_t start, size_t end) +{ + slice->str = str; + slice->start = start; + slice->end = end; +} + +size_t +slice_len(const struct slice *slice) +{ + return slice->end - slice->start; +} + +int +slice_cmp(const struct slice *restrict a, const struct slice *restrict b) +{ + size_t lena = slice_len(a), lenb = slice_len(b); + int lencmp = (lena > lenb) - (lena < lenb); + if (lencmp) { + return lencmp; + } + + for (size_t i = 0; i < lena; i++) { + char ca = a->str[a->start + i], cb = b->str[b->start + i]; + int cmp = (ca > cb) - (ca < cb); + if (cmp) return cmp; + } + + return 0; +} + +void +slice_cpy(struct slice *dst, const struct slice *src) +{ + dst->str = src->str; + dst->start = src->start; + dst->end = src->end; +} + +sds +slice_string(const struct slice *slice, sds str) +{ + size_t len = slice->end - slice->start; + return sdscatlen(str, slice->str + slice->start, len); +} |