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/*
* Copyright © 2008 Kristian Høgsberg
* Copyright © 2013-2015 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include "util-strings.h"
/**
* Return the next word in a string pointed to by state before the first
* separator character. Call repeatedly to tokenize a whole string.
*
* @param state Current state
* @param len String length of the word returned
* @param separators List of separator characters
*
* @return The first word in *state, NOT null-terminated
*/
static const char *
next_word(const char **state, size_t *len, const char *separators)
{
const char *next = *state;
size_t l;
if (!*next)
return NULL;
next += strspn(next, separators);
if (!*next) {
*state = next;
return NULL;
}
l = strcspn(next, separators);
*state = next + l;
*len = l;
return next;
}
/**
* Return a null-terminated string array with the tokens in the input
* string, e.g. "one two\tthree" with a separator list of " \t" will return
* an array [ "one", "two", "three", NULL ].
*
* Use strv_free() to free the array.
*
* @param in Input string
* @param separators List of separator characters
*
* @return A null-terminated string array or NULL on errors
*/
char **
strv_from_string(const char *in, const char *separators)
{
const char *s, *word;
char **strv = NULL;
int nelems = 0, idx;
size_t l;
assert(in != NULL);
s = in;
while (next_word(&s, &l, separators) != NULL)
nelems++;
if (nelems == 0)
return NULL;
nelems++; /* NULL-terminated */
strv = zalloc(nelems * sizeof *strv);
idx = 0;
s = in;
while ((word = next_word(&s, &l, separators)) != NULL) {
char *copy = strndup(word, l);
if (!copy) {
strv_free(strv);
return NULL;
}
strv[idx++] = copy;
}
return strv;
}
/**
* Return a newly allocated string with all elements joined by the
* joiner, same as Python's string.join() basically.
* A strv of ["one", "two", "three", NULL] with a joiner of ", " results
* in "one, two, three".
*
* An empty strv ([NULL]) returns NULL, same for passing NULL as either
* argument.
*
* @param strv Input string array
* @param joiner Joiner between the elements in the final string
*
* @return A null-terminated string joining all elements
*/
char *
strv_join(char **strv, const char *joiner)
{
char **s;
char *str;
size_t slen = 0;
size_t count = 0;
if (!strv || !joiner)
return NULL;
if (strv[0] == NULL)
return NULL;
for (s = strv, count = 0; *s; s++, count++) {
slen += strlen(*s);
}
assert(slen < 1000);
assert(strlen(joiner) < 1000);
assert(count > 0);
assert(count < 100);
slen += (count - 1) * strlen(joiner);
str = zalloc(slen + 1); /* trailing \0 */
for (s = strv; *s; s++) {
strcat(str, *s);
--count;
if (count > 0)
strcat(str, joiner);
}
return str;
}
/**
* Similar to basename() but returns the trunk only without the (last)
* trailing suffix, so that:
*
* - foo.c returns foo
* - foo.a.b returns foo.a
* - foo returns foo
* - foo/ returns ""
*
* @return an allocated string representing the trunk name of the file
*/
char *
trunkname(const char *filename)
{
/* See basename(3), there are two versions and they depend on
* whether libgen.h is included. We can't be sure which basename()
* applies here, so let's play it safe and assume it's the POSIX
* one. */
char *tmp = strdup(filename);
char *base = basename(tmp);
char *suffix;
char *trunk;
if ((suffix = rindex(base, '.')))
*suffix = '\0';
trunk = strdup(base);
free(tmp);
return trunk;
}
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