along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <errno.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "alloc-util.h"
#include "gunicode.h"
+#include "macro.h"
+#include "string-util.h"
#include "utf8.h"
#include "util.h"
-#include "string-util.h"
int strcmp_ptr(const char *a, const char *b) {
return s;
}
+char ascii_tolower(char x) {
+
+ if (x >= 'A' && x <= 'Z')
+ return x - 'A' + 'a';
+
+ return x;
+}
+
char *ascii_strlower(char *t) {
char *p;
assert(t);
for (p = t; *p; p++)
- if (*p >= 'A' && *p <= 'Z')
- *p = *p - 'A' + 'a';
+ *p = ascii_tolower(*p);
+
+ return t;
+}
+
+char *ascii_strlower_n(char *t, size_t n) {
+ size_t i;
+
+ if (n <= 0)
+ return t;
+
+ for (i = 0; i < n; i++)
+ t[i] = ascii_tolower(t[i]);
return t;
}
+int ascii_strcasecmp_n(const char *a, const char *b, size_t n) {
+
+ for (; n > 0; a++, b++, n--) {
+ int x, y;
+
+ x = (int) (uint8_t) ascii_tolower(*a);
+ y = (int) (uint8_t) ascii_tolower(*b);
+
+ if (x != y)
+ return x - y;
+ }
+
+ return 0;
+}
+
+int ascii_strcasecmp_nn(const char *a, size_t n, const char *b, size_t m) {
+ int r;
+
+ r = ascii_strcasecmp_n(a, b, MIN(n, m));
+ if (r != 0)
+ return r;
+
+ if (n < m)
+ return -1;
+ else if (n > m)
+ return 1;
+ else
+ return 0;
+}
+
bool chars_intersect(const char *a, const char *b) {
const char *p;
return 1;
}
-void string_erase(char *x) {
+#pragma GCC push_options
+#pragma GCC optimize("O0")
+
+void* memory_erase(void *p, size_t l) {
+ volatile uint8_t* x = (volatile uint8_t*) p;
+
+ /* This basically does what memset() does, but hopefully isn't
+ * optimized away by the compiler. One of those days, when
+ * glibc learns memset_s() we should replace this call by
+ * memset_s(), but until then this has to do. */
+
+ for (; l > 0; l--)
+ *(x++) = 'x';
+
+ return p;
+}
+
+#pragma GCC pop_options
+
+char* string_erase(char *x) {
if (!x)
- return;
+ return NULL;
/* A delicious drop of snake-oil! To be called on memory where
* we stored passphrases or so, after we used them. */
- memory_erase(x, strlen(x));
+ return memory_erase(x, strlen(x));
}
char *string_free_erase(char *s) {
- if (!s)
- return NULL;
+ return mfree(string_erase(s));
+}
+
+bool string_is_safe(const char *p) {
+ const char *t;
+
+ if (!p)
+ return false;
+
+ for (t = p; *t; t++) {
+ if (*t > 0 && *t < ' ') /* no control characters */
+ return false;
+
+ if (strchr(QUOTES "\\\x7f", *t))
+ return false;
+ }
- string_erase(s);
- return mfree(s);
+ return true;
}