1 files changed, 108 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/syslinux/floadfile.c b/contrib/syslinux-4.02/com32/lib/syslinux/floadfile.c
new file mode 100644
index 0000000..ece460d
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/lib/syslinux/floadfile.c
@@ -0,0 +1,108 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2005-2008 H. Peter Anvin - 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 furnished 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, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * floadfile.c
+ *
+ * Read the contents of a data file into a malloc'd buffer
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include <syslinux/loadfile.h>
+
+#define INCREMENTAL_CHUNK 1024*1024
+
+int floadfile(FILE * f, void **ptr, size_t * len, const void *prefix,
+	      size_t prefix_len)
+{
+    struct stat st;
+    void *data, *dp;
+    size_t alen, clen, rlen, xlen;
+
+    clen = alen = 0;
+    data = NULL;
+
+    if (fstat(fileno(f), &st))
+	goto err;
+
+    if (!S_ISREG(st.st_mode)) {
+	/* Not a regular file, we can't assume we know the file size */
+	if (prefix_len) {
+	    clen = alen = prefix_len;
+	    data = malloc(prefix_len);
+	    if (!data)
+		goto err;
+
+	    memcpy(data, prefix, prefix_len);
+	}
+
+	do {
+	    alen += INCREMENTAL_CHUNK;
+	    dp = realloc(data, alen);
+	    if (!dp)
+		goto err;
+	    data = dp;
+
+	    rlen = fread((char *)data + clen, 1, alen - clen, f);
+	    clen += rlen;
+	} while (clen == alen);
+
+	*len = clen;
+	xlen = (clen + LOADFILE_ZERO_PAD - 1) & ~(LOADFILE_ZERO_PAD - 1);
+	dp = realloc(data, xlen);
+	if (dp)
+	    data = dp;
+	*ptr = data;
+    } else {
+	*len = clen = st.st_size + prefix_len - ftell(f);
+	xlen = (clen + LOADFILE_ZERO_PAD - 1) & ~(LOADFILE_ZERO_PAD - 1);
+
+	*ptr = data = malloc(xlen);
+	if (!data)
+	    return -1;
+
+	memcpy(data, prefix, prefix_len);
+
+	if ((off_t) fread((char *)data + prefix_len, 1, clen - prefix_len, f)
+	    != clen - prefix_len)
+	    goto err;
+    }
+
+    memset((char *)data + clen, 0, xlen - clen);
+    return 0;
+
+err:
+    if (data)
+	free(data);
+    return -1;
+}