Initial add.

extras/abs-file.h

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+/*
+ * stdio/physfs abstraction layer 2002-08-29
+ *
+ * Adam D. Moss <adam@gimp.org> <aspirin@icculus.org>
+ *
+ * These wrapper macros and functions are designed to allow a program
+ * to perform file I/O with identical semantics and syntax regardless
+ * of whether PhysicsFS is being used or not.  Define USE_PHYSFS if
+ * PhysicsFS is being usedl in this case you will still need to initialize
+ * PhysicsFS yourself and set up its search-paths.
+ */
+#ifndef _ABS_FILE_H
+#define _ABS_FILE_H
+/*
+PLEASE NOTE: This license applies to abs-file.h ONLY (to make it clear that
+you may embed this wrapper code within commercial software); PhysicsFS itself
+is (at the time of writing) released under a different license with
+additional restrictions.
+
+Copyright (C) 2002 Adam D. Moss (the "Author").  All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is fur-
+nished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
+NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CON-
+NECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the Author of the
+Software shall not be used in advertising or otherwise to promote the sale,
+use or other dealings in this Software without prior written authorization
+from the Author.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef USE_PHYSFS
+
+#include <physfs.h>
+#define MY_FILETYPE PHYSFS_file
+#define MY_READ(p,s,n,fp) PHYSFS_read(fp,p,s,n)
+#define MY_OPEN_FOR_READ(fn) PHYSFS_openRead(fn)
+static int MY_GETC(MY_FILETYPE * fp) {
+  unsigned char c;
+  /*if (PHYSFS_eof(fp)) {
+    return EOF;
+  }
+  MY_READ(&c, 1, 1, fp);*/
+  if (MY_READ(&c, 1, 1, fp) != 1) {
+    return EOF;
+  }
+  return c;
+}
+static char * MY_GETS(char * const str, int size, MY_FILETYPE * fp) {
+  int i = 0;
+  int c;
+  do {
+    if (i == size-1) {
+      break;
+    }
+    c = MY_GETC(fp);
+    if (c == EOF) {
+      break;
+    }
+    str[i++] = c;
+  } while (c != '\0' &&
+	   c != -1 &&
+	   c != '\n');
+  str[i] = '\0';
+  if (i == 0) {
+    return NULL;
+  }
+  return str;
+}
+#define MY_CLOSE(fp) PHYSFS_close(fp)
+#define MY_ATEOF(fp) PHYSFS_eof(fp)
+#define MY_REWIND(fp) PHYSFS_seek(fp,0)
+
+#else
+
+#define MY_FILETYPE FILE
+#define MY_READ(p,s,n,fp) fread(p,s,n,fp)
+#define MY_OPEN_FOR_READ(n) fopen(n, "rb")
+#define MY_GETC(fp) fgetc(fp)
+#define MY_GETS(str,size,fp) fgets(str,size,fp)
+#define MY_CLOSE(fp) fclose(fp)
+#define MY_ATEOF(fp) feof(fp)
+#define MY_REWIND(fp) rewind(fp)
+
+#endif
+
+#endif