From: Shao Miller <shao.miller@yrdsb.edu.on.ca>
Date: Mon, 28 Jun 2010 06:40:12 +0000 (-0400)
Subject: chain.c32, libcom32: Move chs macros and chs typedef as disk_chs
X-Git-Tag: syslinux-4.06-pre3~3^2~92^2~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6880951cdaadf554a7536859f1a001bed9fd9c34;p=profile%2Fivi%2Fsyslinux.git

chain.c32, libcom32: Move chs macros and chs typedef as disk_chs

Moving portions of chain.c32 into libcom32.

Signed-off-by: Shao Miller <shao.miller@yrdsb.edu.on.ca>
---

diff --git a/com32/include/syslinux/disk.h b/com32/include/syslinux/disk.h
index e81bd3b..d893d7f 100644
--- a/com32/include/syslinux/disk.h
+++ b/com32/include/syslinux/disk.h
@@ -57,6 +57,17 @@ struct disk_ebios_dapa {
     uint64_t lba;
 };
 
+/**
+ * CHS (cylinder, head, sector) value extraction macros.
+ * Taken from WinVBlock.  None expand to an lvalue.
+*/
+#define     chs_head(chs) chs[0]
+#define   chs_sector(chs) (chs[1] & 0x3F)
+#define chs_cyl_high(chs) (((uint16_t)(chs[1] & 0xC0)) << 2)
+#define  chs_cyl_low(chs) ((uint16_t)chs[2])
+#define chs_cylinder(chs) (chs_cyl_high(chs) | chs_cyl_low(chs))
+typedef uint8_t disk_chs[3];
+
 extern int disk_int13_retry(const com32sys_t * inreg, com32sys_t * outreg);
 extern int disk_get_params(int disk, struct disk_info *const diskinfo);
 extern void *disk_read_sectors(const struct disk_info *const diskinfo,
diff --git a/com32/modules/chain.c b/com32/modules/chain.c
index 6bf8827..f631d6e 100644
--- a/com32/modules/chain.c
+++ b/com32/modules/chain.c
@@ -147,23 +147,12 @@ static inline void error(const char *msg)
 
 static struct disk_info diskinfo;
 
-/*
- * CHS (cylinder, head, sector) value extraction macros.
- * Taken from WinVBlock.  Does not expand to an lvalue
-*/
-#define     chs_head(chs) chs[0]
-#define   chs_sector(chs) (chs[1] & 0x3F)
-#define chs_cyl_high(chs) (((uint16_t)(chs[1] & 0xC0)) << 2)
-#define  chs_cyl_low(chs) ((uint16_t)chs[2])
-#define chs_cylinder(chs) (chs_cyl_high(chs) | chs_cyl_low(chs))
-typedef uint8_t chs[3];
-
 /* A DOS partition table entry */
 struct part_entry {
     uint8_t active_flag;	/* 0x80 if "active" */
-    chs start;
+    disk_chs start;
     uint8_t ostype;
-    chs end;
+    disk_chs end;
     uint32_t start_lba;
     uint32_t length;
 } __attribute__ ((packed));