X-Git-Url: http://git.pk910.de/?a=blobdiff_plain;f=src%2Ftools.c;h=3e6a2fc2d8bb547f62f5a4420e24d2e3f7d2b1a0;hb=744387b352bc4d7d42fd6143d8583f3c64e56b9e;hp=e2637cc84737ab7d32f485158767fec240b87efd;hpb=30b61f872c5258918ebc71b9677623de40b630a2;p=NeonServV5.git

diff --git a/src/tools.c b/src/tools.c
index e2637cc..3e6a2fc 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -513,6 +513,32 @@ int isFakeHost(char *host) {
     return (strlen(p2+1) > 4);
 }
 
+static unsigned long crc_table[256];
+
+static void crc32_init() {
+    unsigned long crc;
+    int i, j;
+    for(i = 0; i < 256; i++) {
+        crc = i;
+        for(j = 8; j > 0; j--) {
+            if(crc & 1)
+				crc = (crc >> 1) ^ 0xEDB88320L;
+            else
+                crc >>= 1;
+        }
+        crc_table[i] = crc;
+    }
+}
+
+unsigned long crc32(const char *text) {
+    register unsigned long crc = 0xFFFFFFFF;
+    unsigned int c, i = 0;
+    while((c = (unsigned int)text[i++]) != 0)
+        crc = ((crc >> 8) & 0x00FFFFFF) ^ crc_table[(crc^c) & 0xFF];
+    return (crc^0xFFFFFFFF);
+}
+
 void init_tools() {
     register_default_language_table(msgtab);
+    crc32_init();
 }