Cstrike: Import some memory tools from SourceMod

public/memtools/CDetour/asm/asm.h

@@ -0,0 +1,40 @@
+#ifndef __ASM_H__
+#define __ASM_H__
+
+#define OP_JMP				0xE9
+#define OP_JMP_SIZE			5
+
+#define OP_NOP				0x90
+#define OP_NOP_SIZE			1
+
+#define OP_PREFIX			0xFF
+#define OP_JMP_SEG			0x25
+
+#define OP_JMP_BYTE			0xEB
+#define OP_JMP_BYTE_SIZE	2
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void check_thunks(unsigned char *dest, unsigned char *pc);
+
+//if dest is NULL, returns minimum number of bytes needed to be copied
+//if dest is not NULL, it will copy the bytes to dest as well as fix CALLs and JMPs
+//http://www.devmaster.net/forums/showthread.php?t=2311
+int copy_bytes(unsigned char *func, unsigned char* dest, int required_len);
+
+//insert a specific JMP instruction at the given location
+void inject_jmp(void* src, void* dest);
+
+//fill a given block with NOPs
+void fill_nop(void* src, unsigned int len);
+
+//evaluate a JMP at the target
+void* eval_jump(void* src);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //__ASM_H__