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/*
* String Vector functions modeled after glibc argv_* functions
*
* Copyright Volker Lendecke <vl@samba.org> 2014
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "strv.h"
#include "talloc.h"
#include <string.h>
static int _strv_append(TALLOC_CTX *mem_ctx, char **dst, const char *src,
size_t srclen)
{
size_t dstlen = talloc_array_length(*dst);
size_t newlen = dstlen + srclen;
char *new_dst;
if ((newlen < srclen) || (newlen < dstlen)) {
return ERANGE;
}
new_dst = talloc_realloc(mem_ctx, *dst, char, newlen);
if (new_dst == NULL) {
return ENOMEM;
}
memcpy(&new_dst[dstlen], src, srclen);
*dst = new_dst;
return 0;
}
int strv_add(TALLOC_CTX *mem_ctx, char **strv, const char *string)
{
return _strv_append(mem_ctx, strv, string, strlen(string)+1);
}
int strv_addn(TALLOC_CTX *mem_ctx, char **strv, const char *string, size_t n)
{
char t[n+1];
memcpy(t, string, n);
t[n] = '\0';
return _strv_append(mem_ctx, strv, t, n+1);
}
int strv_append(TALLOC_CTX *mem_ctx, char **strv, const char *src)
{
return _strv_append(mem_ctx, strv, src, talloc_array_length(src));
}
static bool strv_valid_entry(const char *strv, size_t strv_len,
const char *entry, size_t *entry_len)
{
if (strv_len == 0) {
return false;
}
if (strv[strv_len-1] != '\0') {
return false;
}
if (entry < strv) {
return false;
}
if (entry >= (strv+strv_len)) {
return false;
}
if (entry_len != NULL) {
*entry_len = strlen(entry);
}
return true;
}
const char *strv_len_next(const char *strv, size_t strv_len,
const char *entry)
{
size_t entry_len;
if (entry == NULL) {
if (strv_valid_entry(strv, strv_len, strv, NULL)) {
return strv;
}
return NULL;
}
if (!strv_valid_entry(strv, strv_len, entry, &entry_len)) {
return NULL;
}
entry += entry_len+1;
if (entry >= (strv + strv_len)) {
return NULL;
}
return entry;
}
char *strv_next(char *strv, const char *entry)
{
size_t len = talloc_array_length(strv);
const char *result;
result = strv_len_next(strv, len, entry);
return discard_const_p(char, result);
}
size_t strv_count(char *strv)
{
char *entry;
size_t count = 0;
for (entry = strv; entry != NULL; entry = strv_next(strv, entry)) {
count += 1;
}
return count;
}
char *strv_find(char *strv, const char *entry)
{
char *e = NULL;
while ((e = strv_next(strv, e)) != NULL) {
if (strcmp(e, entry) == 0) {
return e;
}
}
return NULL;
}
void strv_delete(char **strv, char *entry)
{
size_t len = talloc_array_length(*strv);
size_t entry_len;
if (entry == NULL) {
return;
}
if (!strv_valid_entry(*strv, len, entry, &entry_len)) {
return;
}
entry_len += 1;
memmove(entry, entry+entry_len,
len - entry_len - (entry - *strv));
*strv = talloc_realloc(NULL, *strv, char, len - entry_len);
}
char * const *strv_to_env(TALLOC_CTX *mem_ctx, char *strv)
{
char **data;
char *next = NULL;
size_t i;
size_t count = strv_count(strv);
if (strv == NULL) {
return NULL;
}
data = talloc_array(mem_ctx, char *, count + 1);
if (data == NULL) {
return NULL;
}
for(i = 0; i < count; i++) {
next = strv_next(strv, next);
data[i] = next;
}
data[count] = NULL;
return data;
}
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