diff options
Diffstat (limited to 'src/librc-strlist.c')
-rw-r--r-- | src/librc-strlist.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/librc-strlist.c b/src/librc-strlist.c new file mode 100644 index 00000000..981f654b --- /dev/null +++ b/src/librc-strlist.c @@ -0,0 +1,141 @@ +/* + librc-strlist.h + String list functions for using char ** arrays + + Copyright 2007 Gentoo Foundation + Based on a previous implementation by Martin Schlemmer + Released under the GPLv2 + */ + +#include <stdbool.h> +#include <stdlib.h> +#include <string.h> + +#include "rc.h" +#include "rc-misc.h" + +char **rc_strlist_add (char **list, const char *item) +{ + char **newlist; + int i = 0; + + if (! item) + return (list); + + while (list && list[i]) + i++; + + newlist = rc_xrealloc (list, sizeof (char *) * (i + 2)); + newlist[i] = rc_xstrdup (item); + newlist[i + 1] = NULL; + + return (newlist); +} + +static char **_rc_strlist_addsort (char **list, const char *item, + int (*sortfunc) (const char *s1, + const char *s2)) +{ + char **newlist; + int i = 0; + char *tmp1; + char *tmp2; + + if (! item) + return (list); + + while (list && list[i]) + i++; + + newlist = rc_xrealloc (list, sizeof (char *) * (i + 2)); + + if (i == 0) + newlist[i] = NULL; + newlist[i + 1] = NULL; + + i = 0; + while (newlist[i] && sortfunc (newlist[i], item) < 0) + i++; + + tmp1 = newlist[i]; + newlist[i] = rc_xstrdup (item); + do + { + i++; + tmp2 = newlist[i]; + newlist[i] = tmp1; + tmp1 = tmp2; + } while (tmp1); + + return (newlist); +} + +char **rc_strlist_addsort (char **list, const char *item) +{ + return (_rc_strlist_addsort (list, item, strcoll)); +} + +char **rc_strlist_addsortc (char **list, const char *item) +{ + return (_rc_strlist_addsort (list, item, strcmp)); +} + +char **rc_strlist_delete (char **list, const char *item) +{ + int i = 0; + + if (!list || ! item) + return (list); + + while (list[i]) + if (strcmp (list[i], item) == 0) + { + free (list[i]); + do + { + list[i] = list[i + 1]; + i++; + } while (list[i]); + } + + return (list); +} + +void rc_strlist_reverse (char **list) +{ + char *item; + int i = 0; + int j = 0; + + if (! list) + return; + + while (list[j]) + j++; + j--; + + while (i < j && list[i] && list[j]) + { + item = list[i]; + list[i] = list[j]; + list[j] = item; + i++; + j--; + } +} + +void rc_strlist_free (char **list) +{ + int i = 0; + + if (! list) + return; + + while (list[i]) + { + free (list[i]); + list[i++] = NULL; + } + + free (list); +} |