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#define _GNU_SOURCE
#include <stdlib.h>
#include <string.h>
#include "string_vec.h"
static int cmpstringp(const void *restrict a, const void *restrict b)
{
/*
* We receive pointers to the array elements (which are pointers to
* char), so convert and dereference them for comparison.
*/
const char *restrict str1 = *(const char **)a;
const char *restrict str2 = *(const char **)b;
/*
* Ensure any NULL strings are shoved to the end.
*/
if (str1 == NULL) {
return 1;
}
if (str2 == NULL) {
return -1;
}
return strcasecmp(str1, str2);
}
struct string_vec string_vec_create(void)
{
struct string_vec vec = {
.count = 0,
.size = 128,
.buf = calloc(128, sizeof(char *))
};
return vec;
}
void string_vec_destroy(struct string_vec *restrict vec)
{
for (size_t i = 0; i < vec->count; i++) {
free(vec->buf[i]);
}
free(vec->buf);
}
struct string_vec string_vec_copy(struct string_vec *restrict vec)
{
struct string_vec copy = {
.count = vec->count,
.size = vec->size,
.buf = calloc(vec->size, sizeof(char *))
};
for (size_t i = 0; i < vec->count; i++) {
copy.buf[i] = strdup(vec->buf[i]);
}
return copy;
}
void string_vec_add(struct string_vec *restrict vec, const char *restrict str)
{
if (vec->count == vec->size) {
vec->size *= 2;
vec->buf = realloc(vec->buf, vec->size * sizeof(vec->buf[0]));
}
vec->buf[vec->count] = strdup(str);
vec->count++;
}
void string_vec_sort(struct string_vec *restrict vec)
{
qsort(vec->buf, vec->count, sizeof(vec->buf[0]), cmpstringp);
}
void string_vec_uniq(struct string_vec *restrict vec)
{
size_t count = vec->count;
for (size_t i = 1; i < vec->count; i++) {
if (!strcmp(vec->buf[i], vec->buf[i-1])) {
free(vec->buf[i-1]);
vec->buf[i-1] = NULL;
count--;
}
}
string_vec_sort(vec);
vec->count = count;
}
struct string_vec string_vec_filter(
const struct string_vec *restrict vec,
const char *restrict substr)
{
struct string_vec filt = string_vec_create();
for (size_t i = 0; i < vec->count; i++) {
if (strcasestr(vec->buf[i], substr) != NULL) {
string_vec_add(&filt, vec->buf[i]);
}
}
return filt;
}
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