moved copy fcts to separate file

[ppastats.git] / src / io.c

diff --git a/src/io.c b/src/io.c
new file mode 100644 (file)
index 0000000..2cce202
--- /dev/null
+++ b/src/io.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2011 jeanfi@gmail.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "io.h"
+
+#define FCOPY_BUF_SZ 4096
+
+static int file_copy(FILE *src, FILE *dst)
+{
+       int ret = 0;
+       char *buf = malloc(FCOPY_BUF_SZ);
+       int n;
+
+       if (!buf)
+               return FILE_COPY_ERROR_ALLOC_BUFFER;
+
+       while (!ret) {
+               n = fread(buf, 1, FCOPY_BUF_SZ, src);
+               if (n) {
+                       if (fwrite(buf, 1, n, dst) != n)
+                               ret = FILE_COPY_ERROR_WRITE;
+               } else {
+                       if (!feof(src))
+                               ret = FILE_COPY_ERROR_READ;
+                       else
+                               break;
+               }
+       }
+
+       free(buf);
+
+       return ret;
+}
+
+int fcopy(const char *src, const char *dst)
+{
+       FILE *fsrc, *fdst;
+       int ret = 0;
+
+       fsrc = fopen(src, "r");
+
+       if (fsrc) {
+               fdst = fopen(dst, "w+");
+
+               if (fdst) {
+                       ret = file_copy(fsrc, fdst);
+                       fclose(fdst);
+               } else {
+                       ret = FILE_COPY_ERROR_OPEN_DST;
+               }
+
+               fclose(fsrc);
+       } else {
+               ret = FILE_COPY_ERROR_OPEN_SRC;
+       }
+
+       return ret;
+}