move patternfind headers and add license information

inc/patternfind/patternfind.h

@@ -0,0 +1,55 @@
+#pragma once
+
+typedef struct
+{
+        struct PatternNibble
+        {
+                uint8_t data;
+                bool wildcard;
+        } nibble[2];
+} PatternByte;
+
+//returns: offset to data when found, -1 when not found
+size_t patternfind(
+        uint8_t *data, //data
+        size_t datasize, //size of data
+        const char *pattern //pattern to search
+);
+
+//returns: offset to data when found, -1 when not found
+size_t patternfind_bytes(
+        uint8_t *data, //data
+        size_t datasize, //size of data
+        const uint8_t *pattern, //bytes to search
+        size_t patternsize //size of bytes to search
+);
+
+//returns: nothing
+void patternwrite(
+        uint8_t *data, //data
+        size_t datasize, //size of data
+        const char *pattern //pattern to write
+);
+
+//returns: true on success, false on failure
+bool patternsnr(
+        uint8_t *data, //data
+        size_t datasize, //size of data
+        const char *searchpattern, //pattern to search
+        const char *replacepattern //pattern to write
+);
+
+//returns: true on success, false on failure
+bool patterntransform(
+        const char *patterntext, //pattern string
+        PatternByte *pattern, //pattern to feed to patternfind
+        size_t patternsize //size of pattern
+);
+
+//returns: offset to data when found, -1 when not found
+size_t patternfind_pbyte(
+        uint8_t *data, //data
+        size_t datasize, //size of data
+        const PatternByte *pattern, //pattern to search
+        size_t searchpatternsize //size of pattern to search
+);