[PATCH v2 0/5] Refactoring with ltrim() and rtrim()

[PATCH v2 0/5] Refactoring with ltrim() and rtrim()

[Taeung Song]

Hi, :)

It is to simply refactor the code about stip strings
with ltrim() and rtrim().

I'd appreciate some feedback on this PATCHset.

The code is avaiable at 'refactor-trim-v2' branch in

  git://github.com/taeung/linux-perf

Thanks,
Taeung

v2:
- remove changes unrelated to the main purpose of PATCH (Arnaldo)

Taeung Song (5):
  perf annotate: Refactor the code to parse disassemble lines with
    {l,r}trim()
  perf annotate: Use stripped line instead of raw disassemble line
  perf ui browser: Refactor the code to parse color configs with ltrim()
  perf pmu: Refactor wordwrap() with ltrim()
  perf tools: Refactor the code to strip command name with {l,r}trim()

 tools/perf/ui/browser.c    |  2 +-
 tools/perf/util/annotate.c | 46 +++++++++-------------------------------------
 tools/perf/util/event.c    | 11 ++---------
 tools/perf/util/pmu.c      |  3 +--
 4 files changed, 13 insertions(+), 49 deletions(-)

-- 
2.7.4

[PATCH v2 1/5] perf annotate: Refactor the code to parse disassemble lines with {l,r}trim()

[Taeung Song]

When parsing disassemble lines,
use ltrim() and rtrim() to strip them,
not using just while loop and isspace().

Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
---
 tools/perf/util/annotate.c | 42 +++++++-----------------------------------
 1 file changed, 7 insertions(+), 35 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index a37032b..5c9669f 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -379,9 +379,7 @@ static int mov__parse(struct arch *arch, struct ins_operands *ops, struct map *m
 	if (comment == NULL)
 		return 0;
 
-	while (comment[0] != '\0' && isspace(comment[0]))
-		++comment;
-
+	comment = ltrim(comment);
 	comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
 	comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
 
@@ -426,9 +424,7 @@ static int dec__parse(struct arch *arch __maybe_unused, struct ins_operands *ops
 	if (comment == NULL)
 		return 0;
 
-	while (comment[0] != '\0' && isspace(comment[0]))
-		++comment;
-
+	comment = ltrim(comment);
 	comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
 
 	return 0;
@@ -777,10 +773,7 @@ static void disasm_line__init_ins(struct disasm_line *dl, struct arch *arch, str
 
 static int disasm_line__parse(char *line, const char **namep, char **rawp)
 {
-	char *name = line, tmp;
-
-	while (isspace(name[0]))
-		++name;
+	char tmp, *name = ltrim(line);
 
 	if (name[0] == '\0')
 		return -1;
@@ -798,12 +791,7 @@ static int disasm_line__parse(char *line, const char **namep, char **rawp)
 		goto out_free_name;
 
 	(*rawp)[0] = tmp;
-
-	if ((*rawp)[0] != '\0') {
-		(*rawp)++;
-		while (isspace((*rawp)[0]))
-			++(*rawp);
-	}
+	*rawp = ltrim(*rawp);
 
 	return 0;
 
@@ -1148,7 +1136,7 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 {
 	struct annotation *notes = symbol__annotation(sym);
 	struct disasm_line *dl;
-	char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
+	char *line = NULL, *parsed_line, *tmp, *tmp2;
 	size_t line_len;
 	s64 line_ip, offset = -1;
 	regmatch_t match[2];
@@ -1159,15 +1147,8 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 	if (!line)
 		return -1;
 
-	while (line_len != 0 && isspace(line[line_len - 1]))
-		line[--line_len] = '\0';
-
-	c = strchr(line, '\n');
-	if (c)
-		*c = 0;
-
 	line_ip = -1;
-	parsed_line = line;
+	parsed_line = rtrim(line);
 
 	/* /filename:linenr ? Save line number and ignore. */
 	if (regexec(&file_lineno, line, 2, match, 0) == 0) {
@@ -1175,16 +1156,7 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 		return 0;
 	}
 
-	/*
-	 * Strip leading spaces:
-	 */
-	tmp = line;
-	while (*tmp) {
-		if (*tmp != ' ')
-			break;
-		tmp++;
-	}
-
+	tmp = ltrim(parsed_line);
 	if (*tmp) {
 		/*
 		 * Parse hexa addresses followed by ':'
-- 
2.7.4

[PATCH v2 2/5] perf annotate: Use stripped line instead of raw disassemble line

[Taeung Song]

When parsing disassemble lines for source line number,
use a stripped line instead of raw line.

Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
---
 tools/perf/util/annotate.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 5c9669f..9fdf263 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1151,8 +1151,8 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 	parsed_line = rtrim(line);
 
 	/* /filename:linenr ? Save line number and ignore. */
-	if (regexec(&file_lineno, line, 2, match, 0) == 0) {
-		*line_nr = atoi(line + match[1].rm_so);
+	if (regexec(&file_lineno, parsed_line, 2, match, 0) == 0) {
+		*line_nr = atoi(parsed_line + match[1].rm_so);
 		return 0;
 	}
 
-- 
2.7.4

[PATCH v2 3/5] perf ui browser: Refactor the code to parse color configs with ltrim()

[Taeung Song]

When parsing {fore, back} ground color configs,
use ltrim() instead of just while loop and isspace().

Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
---
 tools/perf/ui/browser.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index 3eb3edb..9e47ccb 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -579,7 +579,7 @@ static int ui_browser__color_config(const char *var, const char *value,
 			break;
 
 		*bg = '\0';
-		while (isspace(*++bg));
+		bg = ltrim(++bg);
 		ui_browser__colorsets[i].bg = bg;
 		ui_browser__colorsets[i].fg = fg;
 		return 0;
-- 
2.7.4

[PATCH v2 4/5] perf pmu: Refactor wordwrap() with ltrim()

[Taeung Song]

Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
---
 tools/perf/util/pmu.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 362051e..11c7525 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1148,8 +1148,7 @@ static void wordwrap(char *s, int start, int max, int corr)
 			break;
 		s += wlen;
 		column += n;
-		while (isspace(*s))
-			s++;
+		s = ltrim(s);
 	}
 }
 
-- 
2.7.4

[PATCH v2 5/5] perf tools: Refactor the code to strip command name with {l,r}trim()

[Taeung Song]

After reading command name from /proc/<pid>/status,
use ltrim() and rtrim() to strip command name, not using
just while loop, isspace() and etc.

Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
---
 tools/perf/util/event.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 76b9c6b..8255a26 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -106,7 +106,7 @@ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 	int fd;
 	size_t size = 0;
 	ssize_t n;
-	char *nl, *name, *tgids, *ppids;
+	char *name, *tgids, *ppids;
 
 	*tgid = -1;
 	*ppid = -1;
@@ -134,14 +134,7 @@ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 
 	if (name) {
 		name += 5;  /* strlen("Name:") */
-
-		while (*name && isspace(*name))
-			++name;
-
-		nl = strchr(name, '\n');
-		if (nl)
-			*nl = '\0';
-
+		name = rtrim(ltrim(name));
 		size = strlen(name);
 		if (size >= len)
 			size = len - 1;
-- 
2.7.4

Re: [PATCH v2 5/5] perf tools: Refactor the code to strip command name with {l,r}trim()

[David Ahern]

On 4/7/17 8:52 PM, Taeung Song wrote:
> After reading command name from /proc/<pid>/status,
> use ltrim() and rtrim() to strip command name, not using
> just while loop, isspace() and etc.
> 
> Cc: David Ahern <dsahern@gmail.com>
> Cc: Don Zickus <dzickus@redhat.com>
> Cc: Jiri Olsa <jolsa@kernel.org>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
> ---
>  tools/perf/util/event.c | 11 ++---------
>  1 file changed, 2 insertions(+), 9 deletions(-)
> 

Acked-by: David Ahern <dsahern@gmail.com>

Re: [PATCH v2 5/5] perf tools: Refactor the code to strip command name with {l,r}trim()

[Taeung Song]

Hi David,

On 04/09/2017 03:48 AM, David Ahern wrote:
> On 4/7/17 8:52 PM, Taeung Song wrote:
>> After reading command name from /proc/<pid>/status,
>> use ltrim() and rtrim() to strip command name, not using
>> just while loop, isspace() and etc.
>>
>> Cc: David Ahern <dsahern@gmail.com>
>> Cc: Don Zickus <dzickus@redhat.com>
>> Cc: Jiri Olsa <jolsa@kernel.org>
>> Cc: Namhyung Kim <namhyung@kernel.org>
>> Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
>> ---
>>  tools/perf/util/event.c | 11 ++---------
>>  1 file changed, 2 insertions(+), 9 deletions(-)
>>
>
> Acked-by: David Ahern <dsahern@gmail.com>
>

Thank you!

  - Taeung

[tip:perf/core] perf annotate: Refactor the code to parse disassemble lines with {l,r}trim()

[tip-bot for Taeung Song]

Commit-ID:  4597cf0664d2fad785509dedfed22f8fe8951ebb
Gitweb:     http://git.kernel.org/tip/4597cf0664d2fad785509dedfed22f8fe8951ebb
Author:     Taeung Song <treeze.taeung@gmail.com>
AuthorDate: Sat, 8 Apr 2017 09:52:24 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 11 Apr 2017 16:22:22 -0300

perf annotate: Refactor the code to parse disassemble lines with {l,r}trim()

When parsing disassemble lines, use ltrim() and rtrim() to strip them,
not using just while loop and isspace().

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1491612748-1605-2-git-send-email-treeze.taeung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/annotate.c | 42 +++++++-----------------------------------
 1 file changed, 7 insertions(+), 35 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 44ed665..204790d 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -387,9 +387,7 @@ static int mov__parse(struct arch *arch, struct ins_operands *ops, struct map *m
 	if (comment == NULL)
 		return 0;
 
-	while (comment[0] != '\0' && isspace(comment[0]))
-		++comment;
-
+	comment = ltrim(comment);
 	comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
 	comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
 
@@ -434,9 +432,7 @@ static int dec__parse(struct arch *arch __maybe_unused, struct ins_operands *ops
 	if (comment == NULL)
 		return 0;
 
-	while (comment[0] != '\0' && isspace(comment[0]))
-		++comment;
-
+	comment = ltrim(comment);
 	comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
 
 	return 0;
@@ -785,10 +781,7 @@ static void disasm_line__init_ins(struct disasm_line *dl, struct arch *arch, str
 
 static int disasm_line__parse(char *line, const char **namep, char **rawp)
 {
-	char *name = line, tmp;
-
-	while (isspace(name[0]))
-		++name;
+	char tmp, *name = ltrim(line);
 
 	if (name[0] == '\0')
 		return -1;
@@ -806,12 +799,7 @@ static int disasm_line__parse(char *line, const char **namep, char **rawp)
 		goto out_free_name;
 
 	(*rawp)[0] = tmp;
-
-	if ((*rawp)[0] != '\0') {
-		(*rawp)++;
-		while (isspace((*rawp)[0]))
-			++(*rawp);
-	}
+	*rawp = ltrim(*rawp);
 
 	return 0;
 
@@ -1156,7 +1144,7 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 {
 	struct annotation *notes = symbol__annotation(sym);
 	struct disasm_line *dl;
-	char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
+	char *line = NULL, *parsed_line, *tmp, *tmp2;
 	size_t line_len;
 	s64 line_ip, offset = -1;
 	regmatch_t match[2];
@@ -1167,15 +1155,8 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 	if (!line)
 		return -1;
 
-	while (line_len != 0 && isspace(line[line_len - 1]))
-		line[--line_len] = '\0';
-
-	c = strchr(line, '\n');
-	if (c)
-		*c = 0;
-
 	line_ip = -1;
-	parsed_line = line;
+	parsed_line = rtrim(line);
 
 	/* /filename:linenr ? Save line number and ignore. */
 	if (regexec(&file_lineno, line, 2, match, 0) == 0) {
@@ -1183,16 +1164,7 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 		return 0;
 	}
 
-	/*
-	 * Strip leading spaces:
-	 */
-	tmp = line;
-	while (*tmp) {
-		if (*tmp != ' ')
-			break;
-		tmp++;
-	}
-
+	tmp = ltrim(parsed_line);
 	if (*tmp) {
 		/*
 		 * Parse hexa addresses followed by ':'

[tip:perf/core] perf annotate: Use stripped line instead of raw disassemble line

[tip-bot for Taeung Song]

Commit-ID:  986a5bc028a84d487c354a529730b48682d1fb41
Gitweb:     http://git.kernel.org/tip/986a5bc028a84d487c354a529730b48682d1fb41
Author:     Taeung Song <treeze.taeung@gmail.com>
AuthorDate: Sat, 8 Apr 2017 09:52:25 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Tue, 11 Apr 2017 16:22:23 -0300

perf annotate: Use stripped line instead of raw disassemble line

When parsing disassemble lines for source line number, use a stripped
line instead of raw line.

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1491612748-1605-3-git-send-email-treeze.taeung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/annotate.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 204790d..30498a2 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1159,8 +1159,8 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
 	parsed_line = rtrim(line);
 
 	/* /filename:linenr ? Save line number and ignore. */
-	if (regexec(&file_lineno, line, 2, match, 0) == 0) {
-		*line_nr = atoi(line + match[1].rm_so);
+	if (regexec(&file_lineno, parsed_line, 2, match, 0) == 0) {
+		*line_nr = atoi(parsed_line + match[1].rm_so);
 		return 0;
 	}