Remove an "p->field < 0" comparison in grep.c that'll always be
false. In this case "p" is a "grep_pat" where "field" is defined as:
enum grep_header_field field;
And grep_header_field is in turn defined as:
enum grep_header_field {
GREP_HEADER_AUTHOR = 0,
GREP_HEADER_COMMITTER
};
Meaning that this comparison will always be false. This was spotted by
clang 2.9 which produced the following warning while compiling grep.c:
grep.c:330:16: warning: comparison of unsigned enum expression < 0 is always false [-Wtautological-compare]
if (p->field < 0 || GREP_HEADER_FIELD_MAX <= p->field)
~~~~~~~~ ^ ~
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
grep.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/grep.c b/grep.c
index b29d09c..025d3f8 100644
--- a/grep.c
+++ b/grep.c
@@ -327,7 +327,7 @@ static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
for (p = opt->header_list; p; p = p->next) {
if (p->token != GREP_PATTERN_HEAD)
die("bug: a non-header pattern in grep header list.");
- if (p->field < 0 || GREP_HEADER_FIELD_MAX <= p->field)
+ if (GREP_HEADER_FIELD_MAX <= p->field)
die("bug: unknown header field %d", p->field);
compile_regexp(p, opt);
}
--
1.7.6.3
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