[PATCH 31/43] perf tools: Ditch rtrim(), use skip_spaces() to get closer to the kernel

From: Arnaldo Carvalho de Melo
Date: Mon Jul 01 2019 - 22:28:11 EST

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From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

No change in behaviour, just using the same kernel idiom for such
operation.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: AndrÃ Goddard Rosa <andre.goddard@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-a85lkptkt0ru40irpga8yf54@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/builtin-script.c | 12 ++++++------
tools/perf/ui/browser.c | 2 +-
tools/perf/ui/browsers/hists.c | 2 +-
tools/perf/ui/gtk/hists.c | 4 ++--
tools/perf/ui/stdio/hist.c | 2 +-
tools/perf/util/annotate.c | 10 +++++-----
tools/perf/util/event.c | 4 +---
tools/perf/util/pmu.c | 3 ++-
tools/perf/util/stat-display.c | 4 ++--
tools/perf/util/string.c | 14 --------------
tools/perf/util/string2.h | 4 ++--
11 files changed, 23 insertions(+), 38 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 0131f7a0d48d..520e5b6b9ef9 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2880,7 +2880,7 @@ static int read_script_info(struct script_desc *desc, const char *filename)
return -1;

while (fgets(line, sizeof(line), fp)) {
- p = ltrim(line);
+ p = skip_spaces(line);
if (strlen(p) == 0)
continue;
if (*p != '#')
@@ -2889,19 +2889,19 @@ static int read_script_info(struct script_desc *desc, const char *filename)
if (strlen(p) && *p == '!')
continue;

- p = ltrim(p);
+ p = skip_spaces(p);
if (strlen(p) && p[strlen(p) - 1] == '\n')
p[strlen(p) - 1] = '\0';

if (!strncmp(p, "description:", strlen("description:"))) {
p += strlen("description:");
- desc->half_liner = strdup(ltrim(p));
+ desc->half_liner = strdup(skip_spaces(p));
continue;
}

if (!strncmp(p, "args:", strlen("args:"))) {
p += strlen("args:");
- desc->args = strdup(ltrim(p));
+ desc->args = strdup(skip_spaces(p));
continue;
}
}
@@ -3008,7 +3008,7 @@ static int check_ev_match(char *dir_name, char *scriptname,
return -1;

while (fgets(line, sizeof(line), fp)) {
- p = ltrim(line);
+ p = skip_spaces(line);
if (*p == '#')
continue;

@@ -3018,7 +3018,7 @@ static int check_ev_match(char *dir_name, char *scriptname,
break;

p += 2;
- p = ltrim(p);
+ p = skip_spaces(p);
len = strcspn(p, " \t");
if (!len)
break;
diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index 8812c1564995..55ff05a46e0b 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -594,7 +594,7 @@ static int ui_browser__color_config(const char *var, const char *value,
break;

*bg = '\0';
- bg = ltrim(++bg);
+ bg = skip_spaces(bg + 1);
ui_browser__colorsets[i].bg = bg;
ui_browser__colorsets[i].fg = fg;
return 0;
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 59483bdb0027..04a56114df92 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1470,7 +1470,7 @@ static int hist_browser__show_hierarchy_entry(struct hist_browser *browser,
int i = 0;

width -= fmt->entry(fmt, &hpp, entry);
- ui_browser__printf(&browser->b, "%s", ltrim(s));
+ ui_browser__printf(&browser->b, "%s", skip_spaces(s));

while (isspace(s[i++]))
width++;
diff --git a/tools/perf/ui/gtk/hists.c b/tools/perf/ui/gtk/hists.c
index 0c08890f006a..6341c421a8f7 100644
--- a/tools/perf/ui/gtk/hists.c
+++ b/tools/perf/ui/gtk/hists.c
@@ -459,7 +459,7 @@ static void perf_gtk__add_hierarchy_entries(struct hists *hists,
advance_hpp(hpp, ret + 2);
}

- gtk_tree_store_set(store, &iter, col_idx, ltrim(rtrim(bf)), -1);
+ gtk_tree_store_set(store, &iter, col_idx, trim(bf), -1);

if (!he->leaf) {
hpp->buf = bf;
@@ -555,7 +555,7 @@ static void perf_gtk__show_hierarchy(GtkWidget *window, struct hists *hists,
first_col = false;

fmt->header(fmt, &hpp, hists, 0, NULL);
- strcat(buf, ltrim(rtrim(hpp.buf)));
+ strcat(buf, trim(hpp.buf));
}
}

diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
index 4b1a6e921d1c..594e56628904 100644
--- a/tools/perf/ui/stdio/hist.c
+++ b/tools/perf/ui/stdio/hist.c
@@ -516,7 +516,7 @@ static int hist_entry__hierarchy_fprintf(struct hist_entry *he,
* dynamic entries are right-aligned but we want left-aligned
* in the hierarchy mode
*/
- printed += fprintf(fp, "%s%s", sep ?: " ", ltrim(buf));
+ printed += fprintf(fp, "%s%s", sep ?: " ", skip_spaces(buf));
}
printed += putc('\n', fp);

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 65005ccea232..783e2628cc8e 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -557,7 +557,7 @@ static int mov__parse(struct arch *arch, struct ins_operands *ops, struct map_sy
if (comment == NULL)
return 0;

- comment = ltrim(comment);
+ comment = skip_spaces(comment);
comment__symbol(ops->source.raw, comment + 1, &ops->source.addr, &ops->source.name);
comment__symbol(ops->target.raw, comment + 1, &ops->target.addr, &ops->target.name);

@@ -602,7 +602,7 @@ static int dec__parse(struct arch *arch __maybe_unused, struct ins_operands *ops
if (comment == NULL)
return 0;

- comment = ltrim(comment);
+ comment = skip_spaces(comment);
comment__symbol(ops->target.raw, comment + 1, &ops->target.addr, &ops->target.name);

return 0;
@@ -1098,7 +1098,7 @@ 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 tmp, *name = ltrim(line);
+ char tmp, *name = skip_spaces(line);

if (name[0] == '\0')
return -1;
@@ -1116,7 +1116,7 @@ static int disasm_line__parse(char *line, const char **namep, char **rawp)
goto out_free_name;

(*rawp)[0] = tmp;
- *rawp = ltrim(*rawp);
+ *rawp = skip_spaces(*rawp);

return 0;

@@ -1503,7 +1503,7 @@ static int symbol__parse_objdump_line(struct symbol *sym, FILE *file,
return 0;
}

- tmp = ltrim(parsed_line);
+ tmp = skip_spaces(parsed_line);
if (*tmp) {
/*
* Parse hexa addresses followed by ':'
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index d8f8a20543c5..e1d0c5ba1f92 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -158,9 +158,7 @@ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
if (name) {
char *nl;

- name += 5; /* strlen("Name:") */
- name = ltrim(name);
-
+ name = skip_spaces(name + 5); /* strlen("Name:") */
nl = strchr(name, '\n');
if (nl)
*nl = '\0';
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index faa8eb231e1b..38dc0c6e28b8 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/list.h>
#include <linux/compiler.h>
+#include <linux/string.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
@@ -1339,7 +1340,7 @@ static void wordwrap(char *s, int start, int max, int corr)
break;
s += wlen;
column += n;
- s = ltrim(s);
+ s = skip_spaces(s);
}
}

diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index ce993d29cca5..90df41169113 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -212,7 +212,7 @@ static void print_metric_csv(struct perf_stat_config *config __maybe_unused,
return;
}
snprintf(buf, sizeof(buf), fmt, val);
- ends = vals = ltrim(buf);
+ ends = vals = skip_spaces(buf);
while (isdigit(*ends) || *ends == '.')
ends++;
*ends = 0;
@@ -280,7 +280,7 @@ static void print_metric_only_csv(struct perf_stat_config *config __maybe_unused
return;
unit = fixunit(tbuf, os->evsel, unit);
snprintf(buf, sizeof buf, fmt, val);
- ends = vals = ltrim(buf);
+ ends = vals = skip_spaces(buf);
while (isdigit(*ends) || *ends == '.')
ends++;
*ends = 0;
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index d28e723e2790..99a555ea4a9f 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -318,20 +318,6 @@ char *strxfrchar(char *s, char from, char to)
return s;
}

-/**
- * ltrim - Removes leading whitespace from @s.
- * @s: The string to be stripped.
- *
- * Return pointer to the first non-whitespace character in @s.
- */
-char *ltrim(char *s)
-{
- while (isspace(*s))
- s++;
-
- return s;
-}
-
/**
* rtrim - Removes trailing whitespace from @s.
* @s: The string to be stripped.
diff --git a/tools/perf/util/string2.h b/tools/perf/util/string2.h
index 07fd37568543..db02059e31c5 100644
--- a/tools/perf/util/string2.h
+++ b/tools/perf/util/string2.h
@@ -2,6 +2,7 @@
#ifndef PERF_STRING_H
#define PERF_STRING_H

+#include <linux/string.h>
#include <linux/types.h>
#include <stddef.h>
#include <string.h>
@@ -22,12 +23,11 @@ static inline bool strisglob(const char *str)
int strtailcmp(const char *s1, const char *s2);
char *strxfrchar(char *s, char from, char to);

-char *ltrim(char *s);
char *rtrim(char *s);

static inline char *trim(char *s)
{
- return ltrim(rtrim(s));
+ return skip_spaces(rtrim(s));
}

char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints);
--
2.20.1

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