Copyright 2010 Lennart Poettering
systemd 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 2 of the License, or
+ 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.
systemd 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.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
free(l);
}
-char **strv_copy(char **l) {
+char **strv_copy(char * const *l) {
char **r, **k;
- k = r = new(char*, strv_length(l)+1);
- if (!k)
+ k = r = new(char*, strv_length(l) + 1);
+ if (!r)
return NULL;
if (l)
- for (; *l; k++, l++)
- if (!(*k = strdup(*l)))
- goto fail;
+ for (; *l; k++, l++) {
+ *k = strdup(*l);
+ if (!*k) {
+ strv_free(r);
+ return NULL;
+ }
+ }
*k = NULL;
return r;
-
-fail:
- for (k--; k >= r; k--)
- free(*k);
-
- free(r);
-
- return NULL;
}
-unsigned strv_length(char **l) {
+unsigned strv_length(char * const *l) {
unsigned n = 0;
if (!l)
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 = 1;
+ n = x == (const char*) -1 ? 0 : 1;
va_copy(aq, ap);
- while (va_arg(aq, const char*))
+ while ((s = va_arg(aq, const char*))) {
+ if (s == (const char*) -1)
+ continue;
+
n++;
+ }
+
va_end(aq);
}
- if (!(a = new(char*, n+1)))
+ a = new(char*, n+1);
+ if (!a)
return NULL;
if (x) {
- if (!(a[i] = strdup(x))) {
- free(a);
- return NULL;
+ if (x != (const char*) -1) {
+ a[i] = strdup(x);
+ if (!a[i])
+ goto fail;
+ i++;
}
- i++;
-
while ((s = va_arg(ap, const char*))) {
- if (!(a[i] = strdup(s)))
+
+ if (s == (const char*) -1)
+ continue;
+
+ a[i] = strdup(s);
+ if (!a[i])
goto fail;
i++;
return a;
fail:
-
- for (; i > 0; i--)
- if (a[i-1])
- free(a[i-1]);
-
- free(a);
-
+ strv_free(a);
return NULL;
}
return r;
}
-char **strv_merge(char **a, char **b) {
- char **r, **k;
-
- if (!a)
- return strv_copy(b);
-
- if (!b)
- return strv_copy(a);
-
- if (!(r = new(char*, strv_length(a)+strv_length(b)+1)))
- return NULL;
-
- for (k = r; *a; k++, a++)
- if (!(*k = strdup(*a)))
- goto fail;
- for (; *b; k++, b++)
- if (!(*k = strdup(*b)))
- goto fail;
-
- *k = NULL;
- return r;
-
-fail:
- for (k--; k >= r; k--)
- free(*k);
+int strv_extend_strv(char ***a, char **b) {
+ int r;
+ char **s;
- free(r);
+ STRV_FOREACH(s, b) {
+ r = strv_extend(a, *s);
+ if (r < 0)
+ return r;
+ }
- return NULL;
+ return 0;
}
-char **strv_merge_concat(char **a, char **b, const char *suffix) {
- char **r, **k;
-
- /* Like strv_merge(), but appends suffix to all strings in b, before adding */
+int strv_extend_strv_concat(char ***a, char **b, const char *suffix) {
+ int r;
+ char **s;
- if (!b)
- return strv_copy(a);
+ STRV_FOREACH(s, b) {
+ char *v;
- r = new(char*, strv_length(a) + strv_length(b) + 1);
- if (!r)
- return NULL;
+ v = strappend(*s, suffix);
+ if (!v)
+ return -ENOMEM;
- k = r;
- if (a)
- for (; *a; k++, a++) {
- *k = strdup(*a);
- if (!*k)
- goto fail;
+ r = strv_push(a, v);
+ if (r < 0) {
+ free(v);
+ return r;
}
-
- for (; *b; k++, b++) {
- *k = strappend(*b, suffix);
- if (!*k)
- goto fail;
}
- *k = NULL;
- return r;
-
-fail:
- for (k--; k >= r; k--)
- free(*k);
-
- free(r);
-
- return NULL;
-
+ return 0;
}
char **strv_split(const char *s, const char *separator) {
FOREACH_WORD_SEPARATOR(w, l, s, separator, state)
n++;
- if (!(r = new(char*, n+1)))
+ r = new(char*, n+1);
+ if (!r)
return NULL;
i = 0;
- FOREACH_WORD_SEPARATOR(w, l, s, separator, state)
- if (!(r[i++] = strndup(w, l))) {
+ FOREACH_WORD_SEPARATOR(w, l, s, separator, state) {
+ r[i] = strndup(w, l);
+ if (!r[i]) {
strv_free(r);
return NULL;
}
+ i++;
+ }
+
r[i] = NULL;
return r;
}
FOREACH_WORD_QUOTED(w, l, s, state)
n++;
- if (!(r = new(char*, n+1)))
+ r = new(char*, n+1);
+ if (!r)
return NULL;
i = 0;
- FOREACH_WORD_QUOTED(w, l, s, state)
- if (!(r[i++] = cunescape_length(w, l))) {
+ FOREACH_WORD_QUOTED(w, l, s, state) {
+ r[i] = cunescape_length(w, l);
+ if (!r[i]) {
strv_free(r);
return NULL;
}
+ i++;
+ }
r[i] = NULL;
return r;
}
+char **strv_split_newlines(const char *s) {
+ char **l;
+ unsigned n;
+
+ assert(s);
+
+ /* Special version of strv_split() that splits on newlines and
+ * suppresses an empty string at the end */
+
+ l = strv_split(s, NEWLINE);
+ if (!l)
+ return NULL;
+
+ n = strv_length(l);
+ if (n <= 0)
+ return l;
+
+ if (isempty(l[n-1])) {
+ free(l[n-1]);
+ l[n-1] = NULL;
+ }
+
+ return l;
+}
+
char *strv_join(char **l, const char *separator) {
char *r, *e;
char **s;
n += strlen(*s);
}
- if (!(r = new(char, n+1)))
+ r = new(char, n+1);
+ if (!r)
return NULL;
e = r;
return r;
}
-char **strv_append(char **l, const char *s) {
- char **r, **k;
+char *strv_join_quoted(char **l) {
+ char *buf = NULL;
+ char **s;
+ size_t allocated = 0, len = 0;
- if (!l)
- return strv_new(s, NULL);
+ STRV_FOREACH(s, l) {
+ /* assuming here that escaped string cannot be more
+ * than twice as long, and reserving space for the
+ * separator and quotes.
+ */
+ _cleanup_free_ char *esc = NULL;
+ size_t needed;
+
+ if (!GREEDY_REALLOC(buf, allocated,
+ len + strlen(*s) * 2 + 3))
+ goto oom;
+
+ esc = cescape(*s);
+ if (!esc)
+ goto oom;
+
+ needed = snprintf(buf + len, allocated - len, "%s\"%s\"",
+ len > 0 ? " " : "", esc);
+ assert(needed < allocated - len);
+ len += needed;
+ }
- if (!s)
- return strv_copy(l);
+ if (!buf)
+ buf = malloc0(1);
- r = new(char*, strv_length(l)+2);
- if (!r)
- return NULL;
+ return buf;
- for (k = r; *l; k++, l++)
- if (!(*k = strdup(*l)))
- goto fail;
+ oom:
+ free(buf);
+ return NULL;
+}
- if (!(*(k++) = strdup(s)))
- goto fail;
+int strv_push(char ***l, char *value) {
+ char **c;
+ unsigned n;
- *k = NULL;
- return r;
+ if (!value)
+ return 0;
-fail:
- for (k--; k >= r; k--)
- free(*k);
+ n = strv_length(*l);
+ c = realloc(*l, sizeof(char*) * (n + 2));
+ if (!c)
+ return -ENOMEM;
- free(r);
+ c[n] = value;
+ c[n+1] = NULL;
- return NULL;
+ *l = c;
+ return 0;
+}
+
+int strv_extend(char ***l, const char *value) {
+ char *v;
+ int r;
+
+ if (!value)
+ return 0;
+
+ v = strdup(value);
+ if (!v)
+ return -ENOMEM;
+
+ r = strv_push(l, v);
+ if (r < 0)
+ free(v);
+
+ return r;
}
char **strv_uniq(char **l) {
/* Drops every occurrence of s in the string list, edits
* in-place. */
- for (f = t = l; *f; f++) {
-
- if (streq(*f, s)) {
- free(*f);
- continue;
- }
-
- *(t++) = *f;
- }
-
- *t = NULL;
- return l;
-}
-
-char **strv_remove_prefix(char **l, const char *s) {
- char **f, **t;
-
- if (!l)
- return NULL;
-
- assert(s);
-
- /* Drops every occurrence of a string prefixed with s in the
- * string list, edits in-place. */
-
- for (f = t = l; *f; f++) {
-
- if (startswith(*f, s)) {
+ for (f = t = l; *f; f++)
+ if (streq(*f, s))
free(*f);
- continue;
- }
-
- *(t++) = *f;
- }
-
- *t = NULL;
- return l;
-}
-
-static int env_append(char **r, char ***k, char **a) {
- assert(r);
- assert(k);
-
- if (!a)
- return 0;
-
- /* Add the entries of a to *k unless they already exist in *r
- * in which case they are overridden instead. This assumes
- * there is enough space in the r array. */
-
- for (; *a; a++) {
- char **j;
- size_t n;
-
- n = strcspn(*a, "=");
-
- if ((*a)[n] == '=')
- n++;
-
- for (j = r; j < *k; j++)
- if (strncmp(*j, *a, n) == 0)
- break;
-
- if (j >= *k)
- (*k)++;
else
- free(*j);
-
- if (!(*j = strdup(*a)))
- return -ENOMEM;
- }
-
- return 0;
-}
-
-char **strv_env_merge(unsigned n_lists, ...) {
- size_t n = 0;
- char **l, **k, **r;
- va_list ap;
- unsigned i;
-
- /* Merges an arbitrary number of environment sets */
-
- va_start(ap, n_lists);
- for (i = 0; i < n_lists; i++) {
- l = va_arg(ap, char**);
- n += strv_length(l);
- }
- va_end(ap);
-
- if (!(r = new(char*, n+1)))
- return NULL;
-
- k = r;
-
- va_start(ap, n_lists);
- for (i = 0; i < n_lists; i++) {
- l = va_arg(ap, char**);
- if (env_append(r, &k, l) < 0)
- goto fail;
- }
- va_end(ap);
-
- *k = NULL;
-
- return r;
-
-fail:
- va_end(ap);
-
- for (k--; k >= r; k--)
- free(*k);
-
- free(r);
-
- return NULL;
-}
-
-static bool env_match(const char *t, const char *pattern) {
- assert(t);
- assert(pattern);
-
- /* pattern a matches string a
- * a matches a=
- * a matches a=b
- * a= matches a=
- * a=b matches a=b
- * a= does not match a
- * a=b does not match a=
- * a=b does not match a
- * a=b does not match a=c */
-
- if (streq(t, pattern))
- return true;
-
- if (!strchr(pattern, '=')) {
- size_t l = strlen(pattern);
-
- return strncmp(t, pattern, l) == 0 && t[l] == '=';
- }
-
- return false;
-}
-
-char **strv_env_delete(char **x, unsigned n_lists, ...) {
- size_t n, i = 0;
- char **k, **r;
- va_list ap;
-
- /* Deletes every entry from x that is mentioned in the other
- * string lists */
-
- n = strv_length(x);
-
- r = new(char*, n+1);
- if (!r)
- return NULL;
-
- STRV_FOREACH(k, x) {
- unsigned v;
-
- va_start(ap, n_lists);
- for (v = 0; v < n_lists; v++) {
- char **l, **j;
-
- l = va_arg(ap, char**);
- STRV_FOREACH(j, l)
- if (env_match(*k, *j))
- goto skip;
- }
- va_end(ap);
-
- r[i] = strdup(*k);
- if (!r[i]) {
- strv_free(r);
- return NULL;
- }
-
- i++;
- continue;
-
- skip:
- va_end(ap);
- }
-
- r[i] = NULL;
-
- assert(i <= n);
-
- return r;
-}
-
-char **strv_env_unset(char **l, const char *p) {
-
- char **f, **t;
-
- if (!l)
- return NULL;
-
- assert(p);
-
- /* Drops every occurrence of the env var setting p in the
- * string list. edits in-place. */
-
- for (f = t = l; *f; f++) {
-
- if (env_match(*f, p)) {
- free(*f);
- continue;
- }
-
- *(t++) = *f;
- }
+ *(t++) = *f;
*t = NULL;
return l;
}
-char **strv_env_set(char **x, const char *p) {
-
- char **k, **r;
- char* m[2] = { (char*) p, NULL };
-
- /* Overrides the env var setting of p, returns a new copy */
-
- if (!(r = new(char*, strv_length(x)+2)))
- return NULL;
-
- k = r;
- if (env_append(r, &k, x) < 0)
- goto fail;
-
- if (env_append(r, &k, m) < 0)
- goto fail;
-
- *k = NULL;
-
- return r;
-
-fail:
- for (k--; k >= r; k--)
- free(*k);
-
- free(r);
-
- return NULL;
-
-}
-
-char *strv_env_get_with_length(char **l, const char *name, size_t k) {
- char **i;
-
- assert(name);
-
- STRV_FOREACH(i, l)
- if (strncmp(*i, name, k) == 0 &&
- (*i)[k] == '=')
- return *i + k + 1;
-
- return NULL;
-}
-
-char *strv_env_get(char **l, const char *name) {
- return strv_env_get_with_length(l, name, strlen(name));
-}
-
-char **strv_env_clean(char **l) {
- char **r, **ret;
-
- for (r = ret = l; *l; l++) {
- const char *equal;
-
- equal = strchr(*l, '=');
-
- if (equal && equal[1] == 0) {
- free(*l);
- continue;
- }
-
- *(r++) = *l;
- }
-
- *r = NULL;
-
- return ret;
-}
-
char **strv_parse_nulstr(const char *s, size_t l) {
const char *p;
unsigned c = 0, i = 0;
assert(s || l <= 0);
if (l <= 0)
- return strv_new(NULL, NULL);
+ return new0(char*, 1);
for (p = s; p < s + l; p++)
if (*p == 0)
if (s[l-1] != 0)
c++;
- if (!(v = new0(char*, c+1)))
+ v = new0(char*, c+1);
+ if (!v)
return NULL;
p = s;
e = memchr(p, 0, s + l - p);
- if (!(v[i++] = strndup(p, e ? e - p : s + l - p))) {
+ v[i] = strndup(p, e ? e - p : s + l - p);
+ if (!v[i]) {
strv_free(v);
return NULL;
}
+ i++;
+
if (!e)
break;
return v;
}
-bool strv_overlap(char **a, char **b) {
- char **i, **j;
+char **strv_split_nulstr(const char *s) {
+ const char *i;
+ char **r = NULL;
- STRV_FOREACH(i, a) {
- STRV_FOREACH(j, b) {
- if (streq(*i, *j))
- return true;
+ NULSTR_FOREACH(i, s)
+ if (strv_extend(&r, i) < 0) {
+ strv_free(r);
+ return NULL;
}
- }
+
+ if (!r)
+ return strv_new(NULL, NULL);
+
+ return r;
+}
+
+bool strv_overlap(char **a, char **b) {
+ char **i;
+
+ STRV_FOREACH(i, a)
+ if (strv_contains(b, *i))
+ return true;
return false;
}
+
+static int str_compare(const void *_a, const void *_b) {
+ const char **a = (const char**) _a, **b = (const char**) _b;
+
+ return strcmp(*a, *b);
+}
+
+char **strv_sort(char **l) {
+
+ if (strv_isempty(l))
+ return l;
+
+ qsort(l, strv_length(l), sizeof(char*), str_compare);
+ return l;
+}
+
+void strv_print(char **l) {
+ char **s;
+
+ STRV_FOREACH(s, l)
+ puts(*s);
+}
~ianmdlvl / elogind.git / blobdiff