[PATCH alt-v3] Improve function dir.c:trim_trailing_spaces()
- From
- Pasha Bolokhov <pasha.bolokhov@gmail.com>
- Date
- Jun 2, 2014, 22:36 UTC
- Message-ID
- <1401748616-14632-1-git-send-email-pasha.bolokhov@gmail.com>
Discard the unnecessary 'nr_spaces' variable, remove 'strlen()' and improve the 'if' structure. Switch to pointers instead of integers
Slightly more rare occurrences of 'text \ ' with a backslash in between spaces are handled correctly. Namely, the code in 8ba87adad6 does not reset 'last_space' when a backslash is encountered and the above line stays intact as a result. Add a test at the end of t/t0008-ignores.sh to exhibit this behavior
Signed-off-by: Pasha Bolokhov <pasha.bolokhov@gmail.com> --- Add /* fallthrough */ comment to switch(), remove TABs in test, and remove ":" command in file truncation in the test
dir.c | 36 +++++++++++++++++++++--------------- t/t0008-ignores.sh | 23 +++++++++++++++++++++++ 2 files changed, 44 insertions(+), 15 deletions(-)
diff --git a/dir.c b/dir.c index eb6f581..c7dc846 100644 --- a/dir.c +++ b/dir.c @@ -508,21 +508,27 @@ void clear_exclude_list(struct exclude_list *el) static void trim_trailing_spaces(char *buf) { - int i, last_space = -1, nr_spaces, len = strlen(buf); - for (i = 0; i < len; i++) - if (buf[i] == '\\') - i++; - else if (buf[i] == ' ') { - if (last_space == -1) { - last_space = i; - nr_spaces = 1; - } else - nr_spaces++; - } else - last_space = -1; - - if (last_space != -1 && last_space + nr_spaces == len) - buf[last_space] = '\0'; + char *p, *last_space = NULL; + + for (p = buf; *p; p++) + switch (*p) { + case ' ': + if (!last_space) + last_space = p; + break; + + case '\\': + p++; + if (!*p) + return; + /* fallthrough */ + + default: + last_space = NULL; + } + + if (last_space) + *last_space = '\0'; } int add_excludes_from_file_to_list(const char *fname, diff --git a/t/t0008-ignores.sh b/t/t0008-ignores.sh index 63beb99..5ef5ad3 100755 --- a/t/t0008-ignores.sh +++ b/t/t0008-ignores.sh @@ -806,4 +806,27 @@ test_expect_success !MINGW 'quoting allows trailing whitespace' ' test_cmp err.expect err ' +test_expect_success NOT_MINGW,NOT_CYGWIN 'correct handling of backslashes' ' + rm -rf whitespace && + mkdir whitespace && + >"whitespace/trailing 1 " && + >"whitespace/trailing 2 \\\\" && + >"whitespace/trailing 3 \\\\" && + >"whitespace/trailing 4 \\ " && + >"whitespace/trailing 5 \\ \\ " && + >"whitespace/trailing 6 \\a\\" && + >whitespace/untracked && + echo "whitespace/trailing 1 \\ " >ignore && + echo "whitespace/trailing 2 \\\\\\\\\\\\\\\\" >>ignore && + echo "whitespace/trailing 3 \\\\\\\\\\\\\\\\ " >>ignore && + echo "whitespace/trailing 4 \\\\\\\\\\\\ " >>ignore && + echo "whitespace/trailing 5 \\\\\\\\ \\\\\\\\\\\\ " >>ignore && + echo "whitespace/trailing 6 \\\\\\\\a\\\\\\\\" >>ignore && + echo whitespace/untracked >expect && + >err.expect && + git ls-files -o -X ignore whitespace >actual 2>err && + test_cmp expect actual && + test_cmp err.expect err +' + test_done
-- 1.9.1