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authorDenys Vlasenko <vda.linux@googlemail.com>2013-04-21 13:51:41 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2013-04-21 13:51:41 (GMT)
commit264f37363dba6b19d1c6f7db79bc049a1cb5c44b (patch)
tree13a3883806c82083e455c73401c528026e969b9f
parentd96ffda62e9f9c88a6e43dc1926c5b775a611166 (diff)
downloadbusybox-264f37363dba6b19d1c6f7db79bc049a1cb5c44b.tar.gz
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vi: make regexp search case-insensitive if ":set ignorecase" is active
Reported by Dan Moinescu <dan@moinescu.net>. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--editors/vi.c68
1 files changed, 28 insertions, 40 deletions
diff --git a/editors/vi.c b/editors/vi.c
index 3615ee4..097f309 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -1707,65 +1707,53 @@ static char *new_screen(int ro, int co)
// search for pattern starting at p
static char *char_search(char *p, const char *pat, int dir, int range)
{
- char *q;
struct re_pattern_buffer preg;
+ const char *err;
+ char *q;
int i;
int size;
re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
- preg.translate = 0;
- preg.fastmap = 0;
- preg.buffer = 0;
- preg.allocated = 0;
+ if (ignorecase)
+ re_syntax_options = RE_SYNTAX_POSIX_EXTENDED | RE_ICASE;
+
+ memset(&preg, 0, sizeof(preg));
+ err = re_compile_pattern(pat, strlen(pat), &preg);
+ if (err != NULL) {
+ status_line_bold("bad search pattern '%s': %s", pat, err);
+ return p;
+ }
// assume a LIMITED forward search
- q = next_line(p);
- q = end_line(q);
q = end - 1;
- if (dir == BACK) {
- q = prev_line(p);
+ if (dir == BACK)
q = text;
- }
- // count the number of chars to search over, forward or backward
- size = q - p;
- if (size < 0)
- size = p - q;
// RANGE could be negative if we are searching backwards
range = q - p;
-
- q = (char *)re_compile_pattern(pat, strlen(pat), (struct re_pattern_buffer *)&preg);
- if (q != 0) {
- // The pattern was not compiled
- status_line_bold("bad search pattern: '%s': %s", pat, q);
- i = 0; // return p if pattern not compiled
- goto cs1;
- }
-
q = p;
+ size = range;
if (range < 0) {
+ size = -size;
q = p - size;
if (q < text)
q = text;
}
// search for the compiled pattern, preg, in p[]
- // range < 0- search backward
- // range > 0- search forward
+ // range < 0: search backward
+ // range > 0: search forward
// 0 < start < size
- // re_search() < 0 not found or error
- // re_search() > 0 index of found pattern
- // struct pattern char int int int struct reg
- // re_search (*pattern_buffer, *string, size, start, range, *regs)
- i = re_search(&preg, q, size, 0, range, 0);
- if (i == -1) {
- p = 0;
- i = 0; // return NULL if pattern not found
- }
- cs1:
- if (dir == FORWARD) {
+ // re_search() < 0: not found or error
+ // re_search() >= 0: index of found pattern
+ // struct pattern char int int int struct reg
+ // re_search(*pattern_buffer, *string, size, start, range, *regs)
+ i = re_search(&preg, q, size, /*start:*/ 0, range, /*struct re_registers*:*/ NULL);
+ regfree(&preg);
+ if (i < 0)
+ return NULL;
+ if (dir == FORWARD)
p = p + i;
- } else {
+ else
p = p - i;
- }
return p;
}
@@ -1790,7 +1778,7 @@ static char *char_search(char *p, const char *pat, int dir, int range)
len = strlen(pat);
if (dir == FORWARD) {
- stop = end - 1; // assume range is p - end-1
+ stop = end - 1; // assume range is p..end-1
if (range == LIMITED)
stop = next_line(p); // range is to next line
for (start = p; start < stop; start++) {
@@ -1799,7 +1787,7 @@ static char *char_search(char *p, const char *pat, int dir, int range)
}
}
} else if (dir == BACK) {
- stop = text; // assume range is text - p
+ stop = text; // assume range is text..p
if (range == LIMITED)
stop = prev_line(p); // range is to prev line
for (start = p - len; start >= stop; start--) {