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Get rid of magic numbers in report_match() result

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Replace with a class-local `enum class` instance.
This commit is contained in:
Mahmoud Al-Qudsi 2020-11-09 22:30:32 -06:00
parent a14e64ed6c
commit 282fb14dcf
1 changed files with 26 additions and 16 deletions
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42
src/builtin_string.cpp
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@ -828,8 +828,13 @@ class pcre2_matcher_t : public string_matcher_t {
const wchar_t *argv0;
compiled_regex_t regex;
int report_match(const wcstring &arg, int pcre2_rc) {
// Return values: -1 = error, 0 = no match, 1 = match.
enum class match_result_t {
pcre2_error = -1,
no_match = 0,
match = 1,
};
match_result_t report_match(const wcstring &arg, int pcre2_rc) {
if (pcre2_rc == PCRE2_ERROR_NOMATCH) {
if (opts.invert_match && !opts.quiet) {
if (opts.index) {
@ -840,17 +845,17 @@ class pcre2_matcher_t : public string_matcher_t {
}
}
return opts.invert_match ? 1 : 0;
return opts.invert_match ? match_result_t::match : match_result_t::no_match;
} else if (pcre2_rc < 0) {
string_error(streams, _(L"%ls: Regular expression match error: %ls\n"), argv0,
pcre2_strerror(pcre2_rc).c_str());
return -1;
return match_result_t::pcre2_error;
} else if (pcre2_rc == 0) {
// The output vector wasn't big enough. Should not happen.
string_error(streams, _(L"%ls: Regular expression internal error\n"), argv0);
return -1;
return match_result_t::pcre2_error;
} else if (opts.invert_match) {
return 0;
return match_result_t::no_match;
}
if (opts.entire && !opts.quiet) {
@ -874,7 +879,7 @@ class pcre2_matcher_t : public string_matcher_t {
}
}
return opts.invert_match ? 0 : 1;
return opts.invert_match ? match_result_t::no_match : match_result_t::match;
}
public:
@ -896,15 +901,17 @@ class pcre2_matcher_t : public string_matcher_t {
// See pcre2demo.c for an explanation of this logic.
PCRE2_SIZE arglen = arg.length();
int rc = report_match(arg, pcre2_match(regex.code, PCRE2_SPTR(arg.c_str()), arglen, 0, 0,
auto rc = report_match(arg, pcre2_match(regex.code, PCRE2_SPTR(arg.c_str()), arglen, 0, 0,
regex.match, nullptr));
if (rc < 0 /* pcre2 error */)
return false;
else if (rc == 0 /* no match */)
return true;
else
total_matched++;
switch (rc) {
case match_result_t::pcre2_error:
return false;
case match_result_t::no_match:
return true;
case match_result_t::match:
total_matched++;
}
if (opts.invert_match) return true;
@ -921,9 +928,12 @@ class pcre2_matcher_t : public string_matcher_t {
rc = report_match(arg, pcre2_match(regex.code, PCRE2_SPTR(arg.c_str()), arglen, offset,
options, regex.match, nullptr));
if (rc < 0 /* pcre2 error */)
if (rc == match_result_t::pcre2_error) {
// This shouldn't happen as we've already validated the regex above
return false;
else if (rc == 0 /* no matches */) {
}
if (rc == match_result_t::no_match) {
if (options == 0 /* all matches found now */) break;
ovector[1] = offset + 1;
continue;