[PATCH] strcasestr compatibility replacement

Some C libraries lack strcasestr(); add a stupid replacement
to help folks with such.

[jc: original Linus posting, updated with his "also need <ctype.h>",
 updated further with a fix from Joachim B Haga <cjhaga@fys.uio.no>"]

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Makefile b/Makefile
index 877e0b8..957fadc 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,8 @@
 # Define NO_CURL if you do not have curl installed.  git-http-pull is not
 # built, and you cannot use http:// and https:// transports.
 #
+# Define NO_STRCASESTR if you don't have strcasestr.
+#
 # Define PPC_SHA1 environment variable when running make to make use of
 # a bundled SHA1 routine optimized for PowerPC.
 #
@@ -203,6 +205,10 @@ ifdef NEEDS_NSL
        LIBS += -lnsl
        SIMPLE_LIB += -lnsl
 endif
+ifdef NO_STRCASESTR
+       DEFINES += -Dstrcasestr=gitstrcasestr
+       LIB_OBJS += compat/strcasestr.o
+endif
 
 DEFINES += '-DSHA1_HEADER=$(SHA1_HEADER)'
 

diff --git a/compat/strcasestr.c b/compat/strcasestr.c
new file mode 100644 (file)
index 0000000..b96414d
--- /dev/null
+++ b/compat/strcasestr.c
@@ -0,0 +1,23 @@
+#include <string.h>
+#include <ctype.h>
+
+char *gitstrcasestr(const char *haystack, const char *needle)
+{
+       int nlen = strlen(needle);
+       int hlen = strlen(haystack) - nlen + 1;
+       int i;
+
+       for (i = 0; i < hlen; i++) {
+               int j;
+               for (j = 0; j < nlen; j++) {
+                       unsigned char c1 = haystack[i+j];
+                       unsigned char c2 = needle[j];
+                       if (toupper(c1) != toupper(c2))
+                               goto next;
+               }
+               return (char *) haystack + i;
+       next:
+               ;
+       }
+       return NULL;
+}