1 files changed, 89 insertions, 0 deletions
diff --git a/libghack/src/mem.c b/libghack/src/mem.c
new file mode 100755
index 0000000..af9298e
--- /dev/null
+++ b/libghack/src/mem.c
@@ -0,0 +1,89 @@
+#include <stdio.h>
+#include <wchar.h>
+#include <windows.h>
+#include <tchar.h>
+#include <psapi.h>
+#include <string.h>
+#include <inttypes.h>
+#include <math.h>
+
+#include "log.h"
+#include "mem.h"
+
+
+extern LPCVOID calcOffset(LPCVOID adr, SIZE_T offset)
+{
+    LPCVOID r_adr = (LPCVOID)( (LPCVOID)adr+(SIZE_T)offset );
+    return r_adr;
+}
+
+extern SIZE_T readMem(HANDLE hProcess, LPCVOID adr, LPVOID data, SIZE_T siz)
+{
+    SIZE_T rpmBytesRead = 0;
+    if ( ReadProcessMemory( hProcess, adr, data, siz, &rpmBytesRead ) == FALSE )
+    {
+        log_to(__FILE__, __LINE__, "Could not read memory @ 0x%p (%lu/%lu bytes)", adr, siz, rpmBytesRead);
+        return 0;
+    }
+    return rpmBytesRead;
+}
+
+extern LPCVOID readPtr(HANDLE hProcess, LPCVOID adr, SIZE_T offset)
+{
+    LPCVOID r_adr = calcOffset( adr, offset );
+    LPCVOID ptr;
+    if (readMem(hProcess, r_adr, &ptr, sizeof(LPCVOID)) > 0)
+    {
+        return ptr;
+    }
+    log_to(__FILE__, __LINE__, "Could not read pointer @ 0x%p (ERROR: %d)", r_adr, GetLastError());
+    return NULL;
+}
+
+extern SIZE_T findPattern(BYTE *b, const BYTE *p, const char *mask, SIZE_T b_siz, SIZE_T pm_siz)
+{
+    SIZE_T i,j;
+
+    j = 0;
+    for (i = 0; i < b_siz; i++)
+    {
+        if ( *(char *)(mask + j) == 'x' )
+        {
+            if ( *(BYTE *)(b + i) == *(BYTE *)(p + j) )
+            {
+                j++;
+                if ( j == pm_siz ) return (i - pm_siz + 1);
+            }
+            else
+            {
+                j = 0;
+            }
+        }
+        else j++;
+        if (j == pm_siz)
+        {
+            if ( *(char *)(mask + j - 1) == '?' )
+            {
+                return (i - pm_siz + 1);
+            }
+            else j = 0;
+        }
+    }
+    return i;
+}
+
+extern LPCVOID getBaseAdr(BYTE *buf, SIZE_T siz, const BYTE *pat, const char *mask, const SIZE_T pm_siz, const SIZE_T off_pos)
+{
+    SIZE_T pos = 0;
+
+    if ( (pos = findPattern(&buf[0], &pat[0], &mask[0], siz, pm_siz)) <= (siz - pm_siz) )
+    {
+        pos += off_pos;
+    }
+    else
+    {
+        log_to(__FILE__, __LINE__, "Could not get base adress (mask: %s)", mask);
+        return 0x0;
+    }
+    return ( (LPCVOID) pos );
+}