Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/590#discussion_r70461463
--- Diff: core/sql/common/str.cpp ---
@@ -997,19 +997,40 @@ Lng32 str_decode(void *tgt, Lng32 tgtMaxLen, const
char *src, Lng32 srcLen)
return length;
}
-// Strips leading and trailing blanks. src will contain a NULL after the
+// Strips leading and/or trailing blanks. src will contain a NULL after the
// end of the first non-blank character.The length of the "stripped" string
-// is returned in len
-
-void str_strip_blanks(char *src , Lng32 &len)
+// is returned in len.
+// Returns pointer to the start of string after leading blanks.
+char * str_strip_blanks(char *src , Lng32 &len,
+ NABoolean stripLeading,
+ NABoolean stripTrailing
+ )
{
+ if (! src)
+ return NULL;
+
len = str_len(src)-1;
- while ((len >= 0) && (src[len] == ' '))
- len--;
+ if (len <= 0)
+ return src;
--- End diff --
Hmmm... Isn't len a reference parameter? Therefore it is an output as well
as an input. Perhaps it should be pass by value instead?
Let's take another example. Suppose the input string is ' ' (that is, one
blank). The code as written would calculate len = 0 at line 1012, then the 'if'
at line 1013 is true, and we return src without stripping a blank. Seems like
we should return the empty string instead?
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