From 9a054520852368c0a0d179bedfce60776587a645 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Sun, 7 Feb 2010 16:51:28 -0800
Subject: make flate crc32 work when ulong is 64 bits

R=, rsc
CC=
http://codereview.appspot.com/203061
---
 include/flate.h        |  6 +++---
 include/u.h            |  7 +++++++
 src/cmd/jpg/readpng.c  |  6 +++---
 src/cmd/jpg/writepng.c |  6 +++---
 src/cmd/scat/sky.h     |  1 -
 src/libflate/adler.c   |  6 +++---
 src/libflate/crc.c     | 12 ++++++------
 7 files changed, 25 insertions(+), 19 deletions(-)

diff --git a/include/flate.h b/include/flate.h
index e908ec25..e4855597 100644
--- a/include/flate.h
+++ b/include/flate.h
@@ -42,10 +42,10 @@ int	deflatezlibblock(uchar *dst, int dsize, uchar *src, int ssize, int level, in
 
 char	*flateerr(int err);
 
-ulong	*mkcrctab(ulong);
-ulong	blockcrc(ulong *tab, ulong crc, void *buf, int n);
+uint32	*mkcrctab(uint32);
+uint32	blockcrc(uint32 *tab, uint32 crc, void *buf, int n);
 
-ulong	adler32(ulong adler, void *buf, int n);
+uint32	adler32(uint32 adler, void *buf, int n);
 #if defined(__cplusplus)
 }
 #endif
diff --git a/include/u.h b/include/u.h
index e4279179..0e56f98b 100644
--- a/include/u.h
+++ b/include/u.h
@@ -157,6 +157,13 @@ typedef intptr_t intptr;
 typedef uint32_t u32int;
 typedef int32_t s32int;
 
+typedef u32int uint32;
+typedef s32int int32;
+typedef u16int uint16;
+typedef s16int int16;
+typedef u64int uint64;
+typedef s64int int64;
+
 #undef _NEEDUCHAR
 #undef _NEEDUSHORT
 #undef _NEEDUINT
diff --git a/src/cmd/jpg/readpng.c b/src/cmd/jpg/readpng.c
index 2985c5ff..5fdbc1db 100644
--- a/src/cmd/jpg/readpng.c
+++ b/src/cmd/jpg/readpng.c
@@ -44,11 +44,11 @@ typedef struct ZlibR{
 	ZlibW *w;
 } ZlibR;
 
-static ulong *crctab;
+static uint32 *crctab;
 static uchar PNGmagic[] = {137,80,78,71,13,10,26,10};
 static char memerr[] = "ReadPNG: malloc failed: %r";
 
-static ulong
+static uint32
 get4(uchar *a)
 {
 	return (a[0]<<24) | (a[1]<<16) | (a[2]<<8) | a[3];
@@ -87,7 +87,7 @@ static int
 getchunk(Biobuf *b, char *type, uchar *d, int m)
 {
 	uchar buf[8];
-	ulong crc = 0, crc2;
+	uint32 crc = 0, crc2;
 	int n, nr;
 
 	if(Bread(b, buf, 8) != 8)
diff --git a/src/cmd/jpg/writepng.c b/src/cmd/jpg/writepng.c
index 3b63bb7f..76835e01 100644
--- a/src/cmd/jpg/writepng.c
+++ b/src/cmd/jpg/writepng.c
@@ -31,11 +31,11 @@ typedef struct ZlibW{
 	uchar *e;	/* past end of buf */
 } ZlibW;
 
-static ulong *crctab;
+static uint32 *crctab;
 static uchar PNGmagic[] = {137,80,78,71,13,10,26,10};
 
 static void
-put4(uchar *a, ulong v)
+put4(uchar *a, uint32 v)
 {
 	a[0] = v>>24;
 	a[1] = v>>16;
@@ -47,7 +47,7 @@ static void
 chunk(Biobuf *bo, char *type, uchar *d, int n)
 {
 	uchar buf[4];
-	ulong crc = 0;
+	uint32 crc = 0;
 
 	if(strlen(type) != 4)
 		return;
diff --git a/src/cmd/scat/sky.h b/src/cmd/scat/sky.h
index 158dd1c7..6be98145 100644
--- a/src/cmd/scat/sky.h
+++ b/src/cmd/scat/sky.h
@@ -1,4 +1,3 @@
-typedef s32int int32;
 
 #define DIR	"#9/sky"
 /*
diff --git a/src/libflate/adler.c b/src/libflate/adler.c
index 22fb8f6d..538e70f7 100644
--- a/src/libflate/adler.c
+++ b/src/libflate/adler.c
@@ -8,10 +8,10 @@ enum
 	ADLERBASE	= 65521 /* largest prime smaller than 65536 */
 };
 
-ulong
-adler32(ulong adler, void *vbuf, int n)
+uint32
+adler32(uint32 adler, void *vbuf, int n)
 {
-	ulong s1, s2;
+	uint32 s1, s2;
 	uchar *buf, *ebuf;
 	int m;
 
diff --git a/src/libflate/crc.c b/src/libflate/crc.c
index 4da78f6c..8085c23e 100644
--- a/src/libflate/crc.c
+++ b/src/libflate/crc.c
@@ -2,11 +2,11 @@
 #include <libc.h>
 #include <flate.h>
 
-ulong*
-mkcrctab(ulong poly)
+uint32*
+mkcrctab(uint32 poly)
 {
-	ulong *crctab;
-	ulong crc;
+	uint32 *crctab;
+	uint32 crc;
 	int i, j;
 
 	crctab = malloc(256 * sizeof(ulong));
@@ -26,8 +26,8 @@ mkcrctab(ulong poly)
 	return crctab;
 }
 
-ulong
-blockcrc(ulong *crctab, ulong crc, void *vbuf, int n)
+uint32
+blockcrc(uint32 *crctab, uint32 crc, void *vbuf, int n)
 {
 	uchar *buf, *ebuf;
 
-- 
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