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str_list: add str_list_to_str and str_to_str_list functions

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The str_list_to_str and str_to_str_list are helper functions to
convert string list to a single string and vice versa.
This commit is contained in:
Peter Rajnoha 2015-10-20 16:01:10 +02:00
parent 097d14e64e
commit 0d5b1294f0
2 changed files with 89 additions and 0 deletions
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87
lib/datastruct/str_list.c
View File

@ -16,6 +16,8 @@
#include "lib.h"
#include "str_list.h"
#include <ctype.h>
struct dm_list *str_list_create(struct dm_pool *mem)
{
struct dm_list *sl;
@ -160,3 +162,88 @@ int str_list_lists_equal(const struct dm_list *sll, const struct dm_list *sll2)
return 1;
}
char *str_list_to_str(struct dm_pool *mem, const struct dm_list *list,
const char *delim)
{
size_t delim_len = strlen(delim);
unsigned list_size = dm_list_size(list);
struct dm_str_list *sl;
char *str, *p;
size_t len = 0;
unsigned i = 0;
dm_list_iterate_items(sl, list)
len += strlen(sl->str);
if (list_size > 1)
len += ((list_size - 1) * delim_len);
str = mem ? dm_pool_alloc(mem, len+1) : dm_malloc(len+1);
if (!str) {
log_error("str_list_to_str: string allocation failed.");
return NULL;
}
str[len] = '\0';
p = str;
dm_list_iterate_items(sl, list) {
len = strlen(sl->str);
memcpy(p, sl->str, len);
p += len;
if (++i != list_size) {
memcpy(p, delim, delim_len);
p += delim_len;
}
}
return str;
}
struct dm_list *str_to_str_list(struct dm_pool *mem, const char *str,
const char *delim, int ignore_multiple_delim)
{
size_t delim_len = strlen(delim);
struct dm_list *list;
const char *p1, *p2, *next;
char *str_item;
size_t len;
if (!(list = str_list_create(mem))) {
log_error("str_to_str_list: string list allocation failed.");
return NULL;
}
p1 = p2 = str;
while (*p1) {
if (!(p2 = strstr(p1, delim)))
next = p2 = str + strlen(str);
else
next = p2 + delim_len;
len = p2 - p1;
str_item = mem ? dm_pool_alloc(mem, len+1) : dm_malloc(len+1);
if (!str_item) {
log_error("str_to_str_list: string list item allocation failed.");
goto bad;
}
memcpy(str_item, p1, len);
str_item[len] = '\0';
if (!str_list_add_no_dup_check(mem, list, str_item))
goto_bad;
if (ignore_multiple_delim) {
while (!strncmp(next, delim, delim_len))
next += delim_len;
}
p1 = next;
}
return list;
bad:
if (mem)
dm_pool_free(mem, list);
return NULL;
}

2
lib/datastruct/str_list.h
View File

@ -30,5 +30,7 @@ int str_list_match_list(const struct dm_list *sll, const struct dm_list *sll2, c
int str_list_lists_equal(const struct dm_list *sll, const struct dm_list *sll2);
int str_list_dup(struct dm_pool *mem, struct dm_list *sllnew,
const struct dm_list *sllold);
char *str_list_to_str(struct dm_pool *mem, const struct dm_list *list, const char *delim);
struct dm_list *str_to_str_list(struct dm_pool *mem, const char *str, const char *delim, int ignore_multiple_delim);
#endif