git: 9front

Download patch

ref: 785f395ca7f75c6ee848c115d65e639ac5e2f02f
parent: 40910eed4f8e70d7b5ef6412570f24239a81ad0b
author: Ori Bernstein <ori@eigenstate.org>
date: Wed Dec 4 06:46:42 EST 2019 

acme, sam: handle >1GB files correctly

imported from plan9port, edfe3c016fe6ef10c55f7a17aab668214ec21efc


--- a/sys/src/cmd/acme/dat.h
+++ b/sys/src/cmd/acme/dat.h
@@ -68,7 +68,7 @@
 
 struct Block
 {
-	uint		addr;	/* disk address in bytes */
+	vlong		addr;	/* disk address in bytes */
 	union
 	{
 		uint	n;		/* number of used runes in block */
@@ -79,7 +79,7 @@
 struct Disk
 {
 	int		fd;
-	uint		addr;	/* length of temp file */
+	vlong		addr;	/* length of temp file */
 	Block	*free[Maxblock/Blockincr+1];
 };
 
--- a/sys/src/cmd/acme/disk.c
+++ b/sys/src/cmd/acme/disk.c
@@ -82,6 +82,9 @@
 		b = blist;
 		blist = b->next;
 		b->addr = d->addr;
+		if(d->addr+size < d->addr){
+			error("temp file overflow");
+		}
 		d->addr += size;
 	}
 	b->n = n;
--- a/sys/src/cmd/sam/disk.c
+++ b/sys/src/cmd/sam/disk.c
@@ -71,6 +71,9 @@
 		b = blist;
 		blist = b->next;
 		b->addr = d->addr;
+		if(d->addr+size < d->addr){
+			panic("temp file overflow");
+		}
 		d->addr += size;
 	}
 	b->n = n;
--- a/sys/src/cmd/sam/sam.h
+++ b/sys/src/cmd/sam/sam.h
@@ -117,7 +117,7 @@
 struct Disk
 {
 	int		fd;
-	uint		addr;	/* length of temp file */
+	vlong		addr;	/* length of temp file */
 	Block		*free[Maxblock/Blockincr+1];
 };
 
-- 
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