/src/util-linux/lib/strv.c

Source (jump to first uncovered line)
/*
 * SPDX-License-Identifier: LGPL-2.1-or-later
 *
 * Copyright (C) 2010 Lennart Poettering
 * Copyright (C) 2015-2022 Karel Zak <kzak@redhat.com>
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 *
 * Copyright (C) 2015 Karel Zak <kzak@redhat.com>
 *    Modified the original version from systemd project for util-linux.
 */

#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <stdbool.h>
#include <assert.h>

#include "strutils.h"
#include "strv.h"

void strv_clear(char **l) {
        char **k;

        if (!l)
                return;

        for (k = l; *k; k++)
                free(*k);

        *l = NULL;
}

char **strv_free(char **l) {
        strv_clear(l);
        free(l);
        return NULL;
}

char **strv_copy(char * const *l) {
        char **r, **k;

        k = r = malloc(sizeof(char *) * (strv_length(l) + 1));
        if (!r)
                return NULL;

        if (l)
                for (; *l; k++, l++) {
                        *k = strdup(*l);
                        if (!*k) {
                                strv_free(r);
                                return NULL;
                        }
                }

        *k = NULL;
        return r;
}

unsigned strv_length(char * const *l) {
        unsigned n = 0;

        if (!l)
                return 0;

        for (; *l; l++)
                n++;

        return n;
}

static char **strv_new_ap(const char *x, va_list ap) {
        const char *s;
        char **a;
        unsigned n = 0, i = 0;
        va_list aq;

        /* As a special trick we ignore all listed strings that equal
         * (const char*) -1. This is supposed to be used with the
         * STRV_IFNOTNULL() macro to include possibly NULL strings in
         * the string list. */

        if (x) {
                n = x == (const char*) -1 ? 0 : 1;

                va_copy(aq, ap);
                while ((s = va_arg(aq, const char*))) {
                        if (s == (const char*) -1)
                                continue;

                        n++;
                }

                va_end(aq);
        }

        a = malloc(sizeof(char *) * (n + 1));
        if (!a)
                return NULL;

        if (x) {
                if (x != (const char*) -1) {
                        a[i] = strdup(x);
                        if (!a[i])
                                goto fail;
                        i++;
                }

                while ((s = va_arg(ap, const char*))) {

                        if (s == (const char*) -1)
                                continue;

                        a[i] = strdup(s);
                        if (!a[i])
                                goto fail;

                        i++;
                }
        }

        a[i] = NULL;

        return a;

fail:
        strv_free(a);
        return NULL;
}

char **strv_new(const char *x, ...) {
        char **r;
        va_list ap;

        va_start(ap, x);
        r = strv_new_ap(x, ap);
        va_end(ap);

        return r;
}

int strv_extend_strv(char ***a, char **b) {
        int r;
        char **s;

        STRV_FOREACH(s, b) {
                r = strv_extend(a, *s);
                if (r < 0)
                        return r;
        }

        return 0;
}

int strv_extend_strv_concat(char ***a, char **b, const char *suffix) {
        int r;
        char **s;

        STRV_FOREACH(s, b) {
                char *v;

                v = strconcat(*s, suffix);
                if (!v)
                        return -ENOMEM;

                r = strv_push(a, v);
                if (r < 0) {
                        free(v);
                        return r;
                }
        }

        return 0;
}


#define _FOREACH_WORD(word, length, s, separator, quoted, state)        \
        for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))

#define FOREACH_WORD_SEPARATOR(word, length, s, separator, state)       \
        _FOREACH_WORD(word, length, s, separator, false, state)


char **strv_split(const char *s, const char *separator) {
        const char *word, *state;
        size_t l;
        unsigned n, i;
        char **r;

        assert(s);

        n = 0;
        FOREACH_WORD_SEPARATOR(word, l, s, separator, state)
                n++;

        r = malloc(sizeof(char *) * (n + 1));
        if (!r)
                return NULL;

        i = 0;
        FOREACH_WORD_SEPARATOR(word, l, s, separator, state) {
                r[i] = strndup(word, l);
                if (!r[i]) {
                        strv_free(r);
                        return NULL;
                }

                i++;
        }

        r[i] = NULL;
        return r;
}

char *strv_join(char **l, const char *separator) {
        char *r, *e;
        char **s;
        size_t n, k;

        if (!separator)
                separator = " ";

        k = strlen(separator);

        n = 0;
        STRV_FOREACH(s, l) {
                if (n != 0)
                        n += k;
                n += strlen(*s);
        }

        r = malloc(n + 1);
        if (!r)
                return NULL;

        e = r;
        STRV_FOREACH(s, l) {
                if (e != r)
                        e = stpcpy(e, separator);

                e = stpcpy(e, *s);
        }

        *e = 0;

        return r;
}

int strv_push(char ***l, char *value) {
        char **c;
        unsigned n, m;

        if (!value)
                return 0;

        n = strv_length(*l);

        /* Increase and check for overflow */
        m = n + 2;
        if (m < n)
                return -ENOMEM;

        c = reallocarray(*l, m, sizeof(char *));
        if (!c)
                return -ENOMEM;

        c[n] = value;
        c[n+1] = NULL;

        *l = c;
        return 0;
}

int strv_push_prepend(char ***l, char *value) {
        char **c;
        unsigned n, m, i;

        if (!value)
                return 0;

        n = strv_length(*l);

        /* increase and check for overflow */
        m = n + 2;
        if (m < n)
                return -ENOMEM;

        c = malloc(sizeof(char *) * m);
        if (!c)
                return -ENOMEM;

        for (i = 0; i < n; i++)
                c[i+1] = (*l)[i];

        c[0] = value;
        c[n+1] = NULL;

        free(*l);
        *l = c;

        return 0;
}

int strv_consume(char ***l, char *value) {
        int r;

        r = strv_push(l, value);
        if (r < 0)
                free(value);

        return r;
}

int strv_consume_prepend(char ***l, char *value) {
        int r;

        r = strv_push_prepend(l, value);
        if (r < 0)
                free(value);

        return r;
}

int strv_extend(char ***l, const char *value) {
        char *v;

        if (!value)
                return 0;

        v = strdup(value);
        if (!v)
                return -ENOMEM;

        return strv_consume(l, v);
}

char **strv_remove(char **l, const char *s) {
        char **f, **t;

        if (!l)
                return NULL;

        assert(s);

        /* Drops every occurrence of s in the string list, edits
         * in-place. */

        for (f = t = l; *f; f++)
                if (strcmp(*f, s) == 0)
                        free(*f);
                else
                        *(t++) = *f;

        *t = NULL;
        return l;
}

int strv_extendf(char ***l, const char *format, ...) {
        va_list ap;
        char *x;
        int r;

        va_start(ap, format);
        r = vasprintf(&x, format, ap);
        va_end(ap);

        if (r < 0)
                return -ENOMEM;

        return strv_consume(l, x);
}

int strv_extendv(char ***l, const char *format, va_list ap) {
        char *x;
        int r;

        r = vasprintf(&x, format, ap);
        if (r < 0)
                return -ENOMEM;

        return strv_consume(l, x);
}

char **strv_reverse(char **l) {
        unsigned n, i;

        n = strv_length(l);
        if (n <= 1)
                return l;

        for (i = 0; i < n / 2; i++) {
                char *t;

                t = l[i];
                l[i] = l[n-1-i];
                l[n-1-i] = t;
        }

        return l;
}

Coverage Report

Created: 2025-06-13 06:36

Line	Count	Source (jump to first uncovered line)
1		/*
2		* SPDX-License-Identifier: LGPL-2.1-or-later
3		*
4		* Copyright (C) 2010 Lennart Poettering
5		* Copyright (C) 2015-2022 Karel Zak <kzak@redhat.com>
6		*
7		* This is free software; you can redistribute it and/or modify it
8		* under the terms of the GNU Lesser General Public License as published by
9		* the Free Software Foundation; either version 2.1 of the License, or
10		* (at your option) any later version.
11		*
12		*
13		* Copyright (C) 2015 Karel Zak <kzak@redhat.com>
14		* Modified the original version from systemd project for util-linux.
15		*/
16
17		#include <stdlib.h>
18		#include <stdarg.h>
19		#include <string.h>
20		#include <errno.h>
21		#include <stdbool.h>
22		#include <assert.h>
23
24		#include "strutils.h"
25		#include "strv.h"
26
27	0	void strv_clear(char **l) {
28	0	char **k;
29
30	0	if (!l)
31	0	return;
32
33	0	for (k = l; *k; k++)
34	0	free(*k);
35
36	0	*l = NULL;
37	0	}
38
39	0	char strv_free(char l) {
40	0	strv_clear(l);
41	0	free(l);
42	0	return NULL;
43	0	}
44
45	0	char *strv_copy(char const *l) {
46	0	char r, k;
47
48	0	k = r = malloc(sizeof(char ) (strv_length(l) + 1));
49	0	if (!r)
50	0	return NULL;
51
52	0	if (l)
53	0	for (; *l; k++, l++) {
54	0	k = strdup(l);
55	0	if (!*k) {
56	0	strv_free(r);
57	0	return NULL;
58	0	}
59	0	}
60
61	0	*k = NULL;
62	0	return r;
63	0	}
64
65	0	unsigned strv_length(char * const *l) {
66	0	unsigned n = 0;
67
68	0	if (!l)
69	0	return 0;
70
71	0	for (; *l; l++)
72	0	n++;
73
74	0	return n;
75	0	}
76
77	0	static char *strv_new_ap(const char x, va_list ap) {
78	0	const char *s;
79	0	char **a;
80	0	unsigned n = 0, i = 0;
81	0	va_list aq;
82
83		/* As a special trick we ignore all listed strings that equal
84		* (const char*) -1. This is supposed to be used with the
85		* STRV_IFNOTNULL() macro to include possibly NULL strings in
86		* the string list. */
87
88	0	if (x) {
89	0	n = x == (const char*) -1 ? 0 : 1;
90
91	0	va_copy(aq, ap);
92	0	while ((s = va_arg(aq, const char*))) {
93	0	if (s == (const char*) -1)
94	0	continue;
95
96	0	n++;
97	0	}
98
99	0	va_end(aq);
100	0	}
101
102	0	a = malloc(sizeof(char ) (n + 1));
103	0	if (!a)
104	0	return NULL;
105
106	0	if (x) {
107	0	if (x != (const char*) -1) {
108	0	a[i] = strdup(x);
109	0	if (!a[i])
110	0	goto fail;
111	0	i++;
112	0	}
113
114	0	while ((s = va_arg(ap, const char*))) {
115
116	0	if (s == (const char*) -1)
117	0	continue;
118
119	0	a[i] = strdup(s);
120	0	if (!a[i])
121	0	goto fail;
122
123	0	i++;
124	0	}
125	0	}
126
127	0	a[i] = NULL;
128
129	0	return a;
130
131	0	fail:
132	0	strv_free(a);
133	0	return NULL;
134	0	}
135
136	0	char *strv_new(const char x, ...) {
137	0	char **r;
138	0	va_list ap;
139
140	0	va_start(ap, x);
141	0	r = strv_new_ap(x, ap);
142	0	va_end(ap);
143
144	0	return r;
145	0	}
146
147	0	int strv_extend_strv(char *a, char b) {
148	0	int r;
149	0	char **s;
150
151	0	STRV_FOREACH(s, b) {
152	0	r = strv_extend(a, *s);
153	0	if (r < 0)
154	0	return r;
155	0	}
156
157	0	return 0;
158	0	}
159
160	0	int strv_extend_strv_concat(char *a, char b, const char *suffix) {
161	0	int r;
162	0	char **s;
163
164	0	STRV_FOREACH(s, b) {
165	0	char *v;
166
167	0	v = strconcat(*s, suffix);
168	0	if (!v)
169	0	return -ENOMEM;
170
171	0	r = strv_push(a, v);
172	0	if (r < 0) {
173	0	free(v);
174	0	return r;
175	0	}
176	0	}
177
178	0	return 0;
179	0	}
180
181
182		#define _FOREACH_WORD(word, length, s, separator, quoted, state) \
183	0	for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
184
185		#define FOREACH_WORD_SEPARATOR(word, length, s, separator, state) \
186	0	_FOREACH_WORD(word, length, s, separator, false, state)
187
188
189	0	char *strv_split(const char s, const char *separator) {
190	0	const char word, state;
191	0	size_t l;
192	0	unsigned n, i;
193	0	char **r;
194
195	0	assert(s);
196
197	0	n = 0;
198	0	FOREACH_WORD_SEPARATOR(word, l, s, separator, state)
199	0	n++;
200
201	0	r = malloc(sizeof(char ) (n + 1));
202	0	if (!r)
203	0	return NULL;
204
205	0	i = 0;
206	0	FOREACH_WORD_SEPARATOR(word, l, s, separator, state) {
207	0	r[i] = strndup(word, l);
208	0	if (!r[i]) {
209	0	strv_free(r);
210	0	return NULL;
211	0	}
212
213	0	i++;
214	0	}
215
216	0	r[i] = NULL;
217	0	return r;
218	0	}
219
220	0	char strv_join(char l, const char separator) {
221	0	char r, e;
222	0	char **s;
223	0	size_t n, k;
224
225	0	if (!separator)
226	0	separator = " ";
227
228	0	k = strlen(separator);
229
230	0	n = 0;
231	0	STRV_FOREACH(s, l) {
232	0	if (n != 0)
233	0	n += k;
234	0	n += strlen(*s);
235	0	}
236
237	0	r = malloc(n + 1);
238	0	if (!r)
239	0	return NULL;
240
241	0	e = r;
242	0	STRV_FOREACH(s, l) {
243	0	if (e != r)
244	0	e = stpcpy(e, separator);
245
246	0	e = stpcpy(e, *s);
247	0	}
248
249	0	*e = 0;
250
251	0	return r;
252	0	}
253
254	0	int strv_push(char **l, char value) {
255	0	char **c;
256	0	unsigned n, m;
257
258	0	if (!value)
259	0	return 0;
260
261	0	n = strv_length(*l);
262
263		/* Increase and check for overflow */
264	0	m = n + 2;
265	0	if (m < n)
266	0	return -ENOMEM;
267
268	0	c = reallocarray(l, m, sizeof(char ));
269	0	if (!c)
270	0	return -ENOMEM;
271
272	0	c[n] = value;
273	0	c[n+1] = NULL;
274
275	0	*l = c;
276	0	return 0;
277	0	}
278
279	0	int strv_push_prepend(char **l, char value) {
280	0	char **c;
281	0	unsigned n, m, i;
282
283	0	if (!value)
284	0	return 0;
285
286	0	n = strv_length(*l);
287
288		/* increase and check for overflow */
289	0	m = n + 2;
290	0	if (m < n)
291	0	return -ENOMEM;
292
293	0	c = malloc(sizeof(char ) m);
294	0	if (!c)
295	0	return -ENOMEM;
296
297	0	for (i = 0; i < n; i++)
298	0	c[i+1] = (*l)[i];
299
300	0	c[0] = value;
301	0	c[n+1] = NULL;
302
303	0	free(*l);
304	0	*l = c;
305
306	0	return 0;
307	0	}
308
309	0	int strv_consume(char **l, char value) {
310	0	int r;
311
312	0	r = strv_push(l, value);
313	0	if (r < 0)
314	0	free(value);
315
316	0	return r;
317	0	}
318
319	0	int strv_consume_prepend(char **l, char value) {
320	0	int r;
321
322	0	r = strv_push_prepend(l, value);
323	0	if (r < 0)
324	0	free(value);
325
326	0	return r;
327	0	}
328
329	0	int strv_extend(char **l, const char value) {
330	0	char *v;
331
332	0	if (!value)
333	0	return 0;
334
335	0	v = strdup(value);
336	0	if (!v)
337	0	return -ENOMEM;
338
339	0	return strv_consume(l, v);
340	0	}
341
342	0	char strv_remove(char l, const char *s) {
343	0	char f, t;
344
345	0	if (!l)
346	0	return NULL;
347
348	0	assert(s);
349
350		/* Drops every occurrence of s in the string list, edits
351		* in-place. */
352
353	0	for (f = t = l; *f; f++)
354	0	if (strcmp(*f, s) == 0)
355	0	free(*f);
356	0	else
357	0	(t++) = f;
358
359	0	*t = NULL;
360	0	return l;
361	0	}
362
363	0	int strv_extendf(char **l, const char format, ...) {
364	0	va_list ap;
365	0	char *x;
366	0	int r;
367
368	0	va_start(ap, format);
369	0	r = vasprintf(&x, format, ap);
370	0	va_end(ap);
371
372	0	if (r < 0)
373	0	return -ENOMEM;
374
375	0	return strv_consume(l, x);
376	0	}
377
378	0	int strv_extendv(char **l, const char format, va_list ap) {
379	0	char *x;
380	0	int r;
381
382	0	r = vasprintf(&x, format, ap);
383	0	if (r < 0)
384	0	return -ENOMEM;
385
386	0	return strv_consume(l, x);
387	0	}
388
389	0	char strv_reverse(char l) {
390	0	unsigned n, i;
391
392	0	n = strv_length(l);
393	0	if (n <= 1)
394	0	return l;
395
396	0	for (i = 0; i < n / 2; i++) {
397	0	char *t;
398
399	0	t = l[i];
400	0	l[i] = l[n-1-i];
401	0	l[n-1-i] = t;
402	0	}
403
404	0	return l;
405	0	}