ld2string should fail if string contains \0 in the middle

This bug affected RM_StringToLongDouble and HINCRBYFLOAT.
I added tests for both cases.

Main changes:
1. Fixed string2ld to fail if string contains \0 in the middle
2. Use string2ld in getLongDoubleFromObject - No point of
   having duplicated code here

The two changes above broke RM_SaveLongDouble/RM_LoadLongDouble
because the long double string was saved with length+1 (An innocent
mistake, but it's actually a bug - The length passed to
RM_SaveLongDouble should not include the last \0).
This commit is contained in:
Guy Benoish
2020-01-30 18:14:45 +05:30
parent bf53f9280a
commit 2deb55512f
5 changed files with 20 additions and 11 deletions

View File

@ -74,6 +74,15 @@ int test_ld_conv(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
RedisModule_ReplyWithError(ctx, err);
goto final;
}
/* Make sure we can't convert a string that has \0 in it */
char buf[4] = "123";
buf[1] = '\0';
RedisModuleString *s3 = RedisModule_CreateString(ctx, buf, 3);
long double ld3;
if (RedisModule_StringToLongDouble(s3, &ld3) == REDISMODULE_OK) {
RedisModule_ReplyWithError(ctx, "Invalid string successfully converted to long double");
goto final;
}
RedisModule_ReplyWithLongDouble(ctx, ld2);
final:
RedisModule_FreeString(ctx, s1);