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Disable negative offsets for SETRANGE

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This commit is contained in:
Pieter Noordhuis 2010-12-15 11:30:50 +01:00
parent e983cf34be
commit 8f8eeffec1
2 changed files with 7 additions and 44 deletions
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17
src/t_string.c
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@ -195,11 +195,13 @@ void setrangeCommand(redisClient *c) {
if (getLongFromObjectOrReply(c,c->argv[2],&offset,NULL) != REDIS_OK)
return;
if (offset < 0) {
addReplyError(c,"offset is out of range");
return;
}
o = lookupKeyWrite(c->db,c->argv[1]);
if (o == NULL) {
/* Negative offset is always 0 for non-existing keys */
if (offset < 0) offset = 0;
/* Return 0 when setting nothing on a non-existing string */
if (sdslen(value) == 0) {
addReply(c,shared.czero);
@ -233,15 +235,6 @@ void setrangeCommand(redisClient *c) {
return;
}
/* Convert negative indexes. Note that for SETRANGE, the meaning of a
* negative index is a little different than for other commands.
* Here, an offset of -1 points to the trailing NULL byte of the
* string instead of the last character. */
if (offset < 0) {
offset = olen+1+offset;
if (offset < 0) offset = 0;
}
/* Return when the resulting string exceeds allowed size */
if (checkStringLength(c,offset+sdslen(value)) != REDIS_OK)
return;

34
tests/unit/basic.tcl
View File

@ -489,14 +489,6 @@ start_server {tags {"basic"}} {
r del mykey
assert_equal 4 [r setrange mykey 1 foo]
assert_equal "\000foo" [r get mykey]
r del mykey
assert_equal 3 [r setrange mykey -1 foo]
assert_equal "foo" [r get mykey]
r del mykey
assert_equal 3 [r setrange mykey -100 foo]
assert_equal "foo" [r get mykey]
}
test "SETRANGE against string-encoded key" {
@ -512,18 +504,6 @@ start_server {tags {"basic"}} {
assert_equal 3 [r setrange mykey 1 b]
assert_equal "fbo" [r get mykey]
r set mykey "foo"
assert_equal 6 [r setrange mykey -1 bar]
assert_equal "foobar" [r get mykey]
r set mykey "foo"
assert_equal 5 [r setrange mykey -2 bar]
assert_equal "fobar" [r get mykey]
r set mykey "foo"
assert_equal 3 [r setrange mykey -20 bar]
assert_equal "bar" [r get mykey]
r set mykey "foo"
assert_equal 7 [r setrange mykey 4 bar]
assert_equal "foo\000bar" [r get mykey]
@ -549,18 +529,6 @@ start_server {tags {"basic"}} {
assert_encoding raw mykey
assert_equal 1334 [r get mykey]
r set mykey 1234
assert_encoding int mykey
assert_equal 5 [r setrange mykey -1 5]
assert_encoding raw mykey
assert_equal 12345 [r get mykey]
r set mykey 1234
assert_encoding int mykey
assert_equal 4 [r setrange mykey -2 5]
assert_encoding raw mykey
assert_equal 1235 [r get mykey]
r set mykey 1234
assert_encoding int mykey
assert_equal 6 [r setrange mykey 5 2]
@ -577,7 +545,9 @@ start_server {tags {"basic"}} {
test "SETRANGE with out of range offset" {
r del mykey
assert_error "*maximum allowed size*" {r setrange mykey [expr 512*1024*1024-4] world}
r set mykey "hello"
assert_error "*out of range*" {r setrange mykey -1 world}
assert_error "*maximum allowed size*" {r setrange mykey [expr 512*1024*1024-4] world}
}