r3337 - in trunk/payloads/libpayload: include libc

Author: jcrouse
Date: 2008-05-20 22:09:42 +0200 (Tue, 20 May 2008)
New Revision: 3337

Modified:
   trunk/payloads/libpayload/include/libpayload.h
   trunk/payloads/libpayload/libc/lar.c
Log:
libpayload:  Add larfptr function

Add a function to get a pointer to the start of a LAR entry.

Signed-off-by: Jordan Crouse 
Acked-by: Myles Watson

Modified: trunk/payloads/libpayload/include/libpayload.h
===================================================================
--- trunk/payloads/libpayload/include/libpayload.h	2008-05-20 20:08:11 UTC (rev 3336)
+++ trunk/payloads/libpayload/include/libpayload.h	2008-05-20 20:09:42 UTC (rev 3337)
@@ -247,6 +247,7 @@
 struct larent *readlar(struct LAR *lar);
 void rewindlar(struct LAR *lar);
 int larstat(struct LAR *lar, const char *path, struct larstat *buf);
+void *larfptr(struct LAR *lar, const char *filename);
 struct LFILE * lfopen(struct LAR *lar, const char *filename);
 int lfread(void *ptr, size_t size, size_t nmemb, struct LFILE *stream);

Modified: trunk/payloads/libpayload/libc/lar.c
===================================================================
--- trunk/payloads/libpayload/libc/lar.c	2008-05-20 20:08:11 UTC (rev 3336)
+++ trunk/payloads/libpayload/libc/lar.c	2008-05-20 20:09:42 UTC (rev 3337)
@@ -218,6 +218,16 @@
    return 0;
 }

+void * larfptr(struct LAR *lar, const char *filename)
+{
+	struct lar_header *header = get_header_by_name(lar, filename);
+
+	if (header == NULL)
+		return NULL;
+
+	return (void *) ((u8 *) header + ntohl(header->offset));
+}
+
 struct LFILE * lfopen(struct LAR *lar, const char *filename)
 {
    struct LFILE *file;