From 3f5fadef3718f0ada963aeb25be70c8ba71b5c7c Mon Sep 17 00:00:00 2001 From: Patrick Steinhardt Date: Wed, 20 Nov 2024 14:39:38 +0100 Subject: strvec: introduce new `strvec_splice()` function Introduce a new `strvec_splice()` function that can replace a range of strings in the vector with another array of strings. This function will be used in subsequent commits. Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano --- strvec.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'strvec.c') diff --git a/strvec.c b/strvec.c index f712070f57..d1cf4e2496 100644 --- a/strvec.c +++ b/strvec.c @@ -56,6 +56,25 @@ void strvec_pushv(struct strvec *array, const char **items) strvec_push(array, *items); } +void strvec_splice(struct strvec *array, size_t idx, size_t len, + const char **replacement, size_t replacement_len) +{ + if (idx + len > array->nr) + BUG("range outside of array boundary"); + if (replacement_len > len) + ALLOC_GROW(array->v, array->nr + (replacement_len - len) + 1, + array->alloc); + for (size_t i = 0; i < len; i++) + free((char *)array->v[idx + i]); + if (replacement_len != len) { + memmove(array->v + idx + replacement_len, array->v + idx + len, + (array->nr - idx - len + 1) * sizeof(char *)); + array->nr += (replacement_len - len); + } + for (size_t i = 0; i < replacement_len; i++) + array->v[idx + i] = xstrdup(replacement[i]); +} + const char *strvec_replace(struct strvec *array, size_t idx, const char *replacement) { char *to_free; -- cgit v1.2.3