version 0.1.6

[fms.git] / libs / shttpd / string.c

diff --git a/libs/shttpd/string.c b/libs/shttpd/string.c
new file mode 100644 (file)
index 0000000..44f0094
--- /dev/null
+++ b/libs/shttpd/string.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2004-2005 Sergey Lyubka <valenok@gmail.com>
+ * All rights reserved
+ *
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * Sergey Lyubka wrote this file.  As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return.
+ */
+
+#include "defs.h"
+
+void
+my_strlcpy(register char *dst, register const char *src, size_t n)
+{
+       for (; *src != '\0' && n > 1; n--)
+               *dst++ = *src++;
+       *dst = '\0';
+}
+
+int
+my_strncasecmp(const char *str1, const char *str2, size_t len)
+{
+       register const unsigned char    *s1 = (unsigned char *) str1,
+                                       *s2 = (unsigned char *) str2, *e;
+       int                             ret;
+
+       for (e = s1 + len - 1; s1 < e && *s1 != '\0' && *s2 != '\0' &&
+           tolower(*s1) == tolower(*s2); s1++, s2++) ;
+       ret = tolower(*s1) - tolower(*s2);
+
+       return (ret);
+}
+
+char *
+my_strndup(const char *ptr, size_t len)
+{
+       char    *p;
+
+       if ((p = malloc(len + 1)) != NULL)
+               my_strlcpy(p, ptr, len + 1);
+
+       return (p);
+
+}
+
+char *
+my_strdup(const char *str)
+{
+       return (my_strndup(str, strlen(str)));
+}
+
+/*
+ * Sane snprintf(). Acts like snprintf(), but never return -1 or the
+ * value bigger than supplied buffer.
+ * Thanks Adam Zeldis to pointing snprintf()-caused vulnerability
+ * in his audit report.
+ */
+int
+my_snprintf(char *buf, size_t buflen, const char *fmt, ...)
+{
+       va_list         ap;
+       int             n;
+
+       if (buflen == 0)
+               return (0);
+
+       va_start(ap, fmt);
+       n = vsnprintf(buf, buflen, fmt, ap);
+       va_end(ap);
+
+       if (n < 0 || (size_t) n >= buflen)
+               n = buflen - 1;
+       buf[n] = '\0';
+
+       return (n);
+}
+
+/*
+ * Verify that given file has certain extension
+ */
+int
+match_extension(const char *path, const char *ext_list)
+{
+       size_t          len, path_len;
+       
+       path_len = strlen(path);
+
+       FOR_EACH_WORD_IN_LIST(ext_list, len)
+               if (len < path_len &&
+                   !my_strncasecmp(path + path_len - len, ext_list, len))
+                       return (1);
+
+       return (0);
+}