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11ce77b5cc
Add two functions that allow to replace and remove strings contained in the strvec. This will be used by a subsequent commit that refactors git-mv(1). While at it, add a bunch of unit tests that cover both old and new functionality. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
#include "git-compat-util.h"
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#include "strvec.h"
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#include "strbuf.h"
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const char *empty_strvec[] = { NULL };
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void strvec_init(struct strvec *array)
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{
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struct strvec blank = STRVEC_INIT;
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memcpy(array, &blank, sizeof(*array));
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}
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static void strvec_push_nodup(struct strvec *array, const char *value)
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{
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if (array->v == empty_strvec)
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array->v = NULL;
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ALLOC_GROW(array->v, array->nr + 2, array->alloc);
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array->v[array->nr++] = value;
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array->v[array->nr] = NULL;
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}
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const char *strvec_push(struct strvec *array, const char *value)
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{
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strvec_push_nodup(array, xstrdup(value));
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return array->v[array->nr - 1];
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}
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const char *strvec_pushf(struct strvec *array, const char *fmt, ...)
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{
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va_list ap;
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struct strbuf v = STRBUF_INIT;
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va_start(ap, fmt);
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strbuf_vaddf(&v, fmt, ap);
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va_end(ap);
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strvec_push_nodup(array, strbuf_detach(&v, NULL));
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return array->v[array->nr - 1];
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}
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void strvec_pushl(struct strvec *array, ...)
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{
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va_list ap;
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const char *arg;
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va_start(ap, array);
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while ((arg = va_arg(ap, const char *)))
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strvec_push(array, arg);
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va_end(ap);
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}
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void strvec_pushv(struct strvec *array, const char **items)
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{
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for (; *items; items++)
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strvec_push(array, *items);
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}
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const char *strvec_replace(struct strvec *array, size_t idx, const char *replacement)
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{
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char *to_free;
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if (idx >= array->nr)
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BUG("index outside of array boundary");
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to_free = (char *) array->v[idx];
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array->v[idx] = xstrdup(replacement);
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free(to_free);
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return array->v[idx];
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}
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void strvec_remove(struct strvec *array, size_t idx)
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{
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if (idx >= array->nr)
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BUG("index outside of array boundary");
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free((char *)array->v[idx]);
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memmove(array->v + idx, array->v + idx + 1, (array->nr - idx) * sizeof(char *));
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array->nr--;
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}
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void strvec_pop(struct strvec *array)
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{
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if (!array->nr)
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return;
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free((char *)array->v[array->nr - 1]);
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array->v[array->nr - 1] = NULL;
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array->nr--;
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}
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void strvec_split(struct strvec *array, const char *to_split)
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{
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while (isspace(*to_split))
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to_split++;
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for (;;) {
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const char *p = to_split;
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if (!*p)
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break;
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while (*p && !isspace(*p))
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p++;
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strvec_push_nodup(array, xstrndup(to_split, p - to_split));
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while (isspace(*p))
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p++;
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to_split = p;
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}
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}
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void strvec_clear(struct strvec *array)
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{
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if (array->v != empty_strvec) {
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int i;
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for (i = 0; i < array->nr; i++)
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free((char *)array->v[i]);
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free(array->v);
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}
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strvec_init(array);
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}
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const char **strvec_detach(struct strvec *array)
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{
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if (array->v == empty_strvec)
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return xcalloc(1, sizeof(const char *));
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else {
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const char **ret = array->v;
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strvec_init(array);
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return ret;
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}
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}
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