refactor all common parts and games

common/util/slurp.c

@@ -0,0 +1,67 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+/*
+ * 'slurp' reads the file identified by 'path' into a character buffer
+ * pointed at by 'buf', optionally adding a terminating NUL if
+ * 'add_nul' is true. On success, the size of the file is returned; on
+ * failure, -1 is returned and ERRNO is set by the underlying system
+ * or library call that failed.
+ *
+ * WARNING: 'slurp' malloc()s memory to '*buf' which must be freed by
+ * the caller.
+ */
+long wslurp(const wchar_t* path, char **buf, bool add_nul)
+{
+    FILE  *fp;
+    size_t fsz;
+    long   off_end;
+    int    rc;
+
+    /* Open the file */
+    fp = _wfopen(path, L"rb");
+    if( NULL == fp ) {
+        return -1L;
+    }
+
+    /* Seek to the end of the file */
+    rc = fseek(fp, 0L, SEEK_END);
+    if( 0 != rc ) {
+        return -1L;
+    }
+
+    /* Byte offset to the end of the file (size) */
+    if( 0 > (off_end = ftell(fp)) ) {
+        return -1L;
+    }
+    fsz = (size_t)off_end;
+
+    /* Allocate a buffer to hold the whole file */
+    *buf = malloc( fsz+(int)add_nul );
+    if( NULL == *buf ) {
+        return -1L;
+    }
+
+    /* Rewind file pointer to start of file */
+    rewind(fp);
+
+    /* Slurp file into buffer */
+    if( fsz != fread(*buf, 1, fsz, fp) ) {
+        free(*buf);
+        return -1L;
+    }
+
+    /* Close the file */
+    if( EOF == fclose(fp) ) {
+        free(*buf);
+        return -1L;
+    }
+
+    if( add_nul ) {
+        /* Make sure the buffer is NUL-terminated, just in case */
+        buf[fsz] = '\0';
+    }
+
+    /* Return the file size */
+    return (long)fsz;
+}