add curl 7.16.0 to in tree libs

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3744 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/curl/lib/strequal.c

@@ -0,0 +1,140 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2006, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * $Id: strequal.c,v 1.29 2006-10-27 03:47:58 yangtse Exp $
+ ***************************************************************************/
+
+#include "setup.h"
+
+#include <string.h>
+#include <ctype.h>
+
+#include "strequal.h"
+
+#if defined(HAVE_STRCASECMP) && defined(__STRICT_ANSI__)
+/* this is for "-ansi -Wall -pedantic" to stop complaining! */
+extern int (strcasecmp)(const char *s1, const char *s2);
+extern int (strncasecmp)(const char *s1, const char *s2, size_t n);
+#endif
+
+int curl_strequal(const char *first, const char *second)
+{
+#if defined(HAVE_STRCASECMP)
+  return !(strcasecmp)(first, second);
+#elif defined(HAVE_STRCMPI)
+  return !(strcmpi)(first, second);
+#elif defined(HAVE_STRICMP)
+  return !(stricmp)(first, second);
+#else
+  while (*first && *second) {
+    if (toupper(*first) != toupper(*second)) {
+      break;
+    }
+    first++;
+    second++;
+  }
+  return toupper(*first) == toupper(*second);
+#endif
+}
+
+int curl_strnequal(const char *first, const char *second, size_t max)
+{
+#if defined(HAVE_STRCASECMP)
+  return !strncasecmp(first, second, max);
+#elif defined(HAVE_STRCMPI)
+  return !strncmpi(first, second, max);
+#elif defined(HAVE_STRICMP)
+  return !strnicmp(first, second, max);
+#else
+  while (*first && *second && max) {
+    if (toupper(*first) != toupper(*second)) {
+      break;
+    }
+    max--;
+    first++;
+    second++;
+  }
+  if(0 == max)
+    return 1; /* they are equal this far */
+
+  return toupper(*first) == toupper(*second);
+#endif
+}
+
+/*
+ * Curl_strcasestr() finds the first occurrence of the substring needle in the
+ * string haystack.  The terminating `\0' characters are not compared. The
+ * matching is done CASE INSENSITIVE, which thus is the difference between
+ * this and strstr().
+ */
+char *Curl_strcasestr(const char *haystack, const char *needle)
+{
+  size_t nlen = strlen(needle);
+  size_t hlen = strlen(haystack);
+
+  while(hlen-- >= nlen) {
+    if(curl_strnequal(haystack, needle, nlen))
+      return (char *)haystack;
+    haystack++;
+  }
+  return NULL;
+}
+
+#ifndef HAVE_STRLCAT
+/*
+ * The strlcat() function appends the NUL-terminated string src to the end
+ * of dst. It will append at most size - strlen(dst) - 1 bytes, NUL-termi-
+ * nating the result.
+ *
+ * The strlcpy() and strlcat() functions return the total length of the
+ * string they tried to create.  For strlcpy() that means the length of src.
+ * For strlcat() that means the initial length of dst plus the length of
+ * src. While this may seem somewhat confusing it was done to make trunca-
+ * tion detection simple.
+ *
+ *
+ */
+size_t Curl_strlcat(char *dst, const char *src, size_t siz)
+{
+  char *d = dst;
+  const char *s = src;
+  size_t n = siz;
+  size_t dlen;
+
+  /* Find the end of dst and adjust bytes left but don't go past end */
+  while (n-- != 0 && *d != '\0')
+    d++;
+  dlen = d - dst;
+  n = siz - dlen;
+
+  if (n == 0)
+    return(dlen + strlen(s));
+  while (*s != '\0') {
+    if (n != 1) {
+      *d++ = *s;
+      n--;
+    }
+    s++;
+  }
+  *d = '\0';
+
+  return(dlen + (s - src));     /* count does not include NUL */
+}
+#endif