linux/tools/perf/util/color.c

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#include <linux/kernel.h>
#include "cache.h"
#include "color.h"
#include <math.h>
int perf_use_color_default = -1;
int perf_config_colorbool(const char *var, const char *value, int stdout_is_tty)
{
if (value) {
if (!strcasecmp(value, "never"))
return 0;
if (!strcasecmp(value, "always"))
return 1;
if (!strcasecmp(value, "auto"))
goto auto_color;
}
/* Missing or explicit false to turn off colorization */
if (!perf_config_bool(var, value))
return 0;
/* any normal truth value defaults to 'auto' */
auto_color:
if (stdout_is_tty < 0)
stdout_is_tty = isatty(1);
if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
char *term = getenv("TERM");
if (term && strcmp(term, "dumb"))
return 1;
}
return 0;
}
int perf_color_default_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, "color.ui")) {
perf_use_color_default = perf_config_colorbool(var, value, -1);
return 0;
}
return perf_default_config(var, value, cb);
}
static int __color_vsnprintf(char *bf, size_t size, const char *color,
const char *fmt, va_list args, const char *trail)
{
int r = 0;
/*
* Auto-detect:
*/
if (perf_use_color_default < 0) {
if (isatty(1) || pager_in_use())
perf_use_color_default = 1;
else
perf_use_color_default = 0;
}
if (perf_use_color_default && *color)
r += scnprintf(bf, size, "%s", color);
r += vscnprintf(bf + r, size - r, fmt, args);
if (perf_use_color_default && *color)
r += scnprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
if (trail)
r += scnprintf(bf + r, size - r, "%s", trail);
return r;
}
/* Colors are not included in return value */
static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
va_list args)
{
int r = 0;
/*
* Auto-detect:
*/
if (perf_use_color_default < 0) {
if (isatty(fileno(fp)) || pager_in_use())
perf_use_color_default = 1;
else
perf_use_color_default = 0;
}
if (perf_use_color_default && *color)
fprintf(fp, "%s", color);
r += vfprintf(fp, fmt, args);
if (perf_use_color_default && *color)
fprintf(fp, "%s", PERF_COLOR_RESET);
return r;
}
int color_vsnprintf(char *bf, size_t size, const char *color,
const char *fmt, va_list args)
{
return __color_vsnprintf(bf, size, color, fmt, args, NULL);
}
int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args)
{
return __color_vfprintf(fp, color, fmt, args);
}
int color_snprintf(char *bf, size_t size, const char *color,
const char *fmt, ...)
{
va_list args;
int r;
va_start(args, fmt);
r = color_vsnprintf(bf, size, color, fmt, args);
va_end(args);
return r;
}
int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
{
va_list args;
int r;
va_start(args, fmt);
r = color_vfprintf(fp, color, fmt, args);
va_end(args);
return r;
}
/*
* This function splits the buffer by newlines and colors the lines individually.
*
* Returns 0 on success.
*/
int color_fwrite_lines(FILE *fp, const char *color,
size_t count, const char *buf)
{
if (!*color)
return fwrite(buf, count, 1, fp) != 1;
while (count) {
char *p = memchr(buf, '\n', count);
if (p != buf && (fputs(color, fp) < 0 ||
fwrite(buf, p ? (size_t)(p - buf) : count, 1, fp) != 1 ||
fputs(PERF_COLOR_RESET, fp) < 0))
return -1;
if (!p)
return 0;
if (fputc('\n', fp) < 0)
return -1;
count -= p + 1 - buf;
buf = p + 1;
}
return 0;
}
perf: Enable more compiler warnings Related to a shadowed variable bug fix Valdis Kletnieks noticed that perf does not get built with -Wshadow, which could have helped us avoid the bug. So enable -Wshadow and also enable the following warnings on perf builds, in addition to the already enabled -Wall -Wextra -std=gnu99 warnings: -Wcast-align -Wformat=2 -Wshadow -Winit-self -Wpacked -Wredundant-decls -Wstack-protector -Wstrict-aliasing=3 -Wswitch-default -Wswitch-enum -Wno-system-headers -Wundef -Wvolatile-register-var -Wwrite-strings -Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement And change/fix the perf code to build cleanly under GCC 4.3.2. The list of warnings enablement is rather arbitrary: it's based on my (quick) reading of the GCC manpages and trying them on perf. I categorized the warnings based on individually enabling them and looking whether they trigger something in the perf build. If i liked those warnings (i.e. if they trigger for something that arguably could be improved) i enabled the warning. If the warnings seemed to come from language laywers spamming the build with tons of nuisance warnings i generally kept them off. Most of the sign conversion related warnings were in this category. (A second patch enabling some of the sign warnings might be welcome - sign bugs can be nasty.) I also kept warnings that seem to make sense from their manpage description and which produced no actual warnings on our code base. These warnings might still be turned off if they end up being a nuisance. I also left out a few warnings that are not supported in older compilers. [ Note that these changes might break the build on older compilers i did not test, or on non-x86 architectures that produce different warnings, so more testing would be welcome. ] Reported-by: Valdis.Kletnieks@vt.edu Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-15 18:26:57 +08:00
const char *get_percent_color(double percent)
{
perf: Enable more compiler warnings Related to a shadowed variable bug fix Valdis Kletnieks noticed that perf does not get built with -Wshadow, which could have helped us avoid the bug. So enable -Wshadow and also enable the following warnings on perf builds, in addition to the already enabled -Wall -Wextra -std=gnu99 warnings: -Wcast-align -Wformat=2 -Wshadow -Winit-self -Wpacked -Wredundant-decls -Wstack-protector -Wstrict-aliasing=3 -Wswitch-default -Wswitch-enum -Wno-system-headers -Wundef -Wvolatile-register-var -Wwrite-strings -Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement And change/fix the perf code to build cleanly under GCC 4.3.2. The list of warnings enablement is rather arbitrary: it's based on my (quick) reading of the GCC manpages and trying them on perf. I categorized the warnings based on individually enabling them and looking whether they trigger something in the perf build. If i liked those warnings (i.e. if they trigger for something that arguably could be improved) i enabled the warning. If the warnings seemed to come from language laywers spamming the build with tons of nuisance warnings i generally kept them off. Most of the sign conversion related warnings were in this category. (A second patch enabling some of the sign warnings might be welcome - sign bugs can be nasty.) I also kept warnings that seem to make sense from their manpage description and which produced no actual warnings on our code base. These warnings might still be turned off if they end up being a nuisance. I also left out a few warnings that are not supported in older compilers. [ Note that these changes might break the build on older compilers i did not test, or on non-x86 architectures that produce different warnings, so more testing would be welcome. ] Reported-by: Valdis.Kletnieks@vt.edu Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-15 18:26:57 +08:00
const char *color = PERF_COLOR_NORMAL;
/*
* We color high-overhead entries in red, mid-overhead
* entries in green - and keep the low overhead places
* normal:
*/
if (fabs(percent) >= MIN_RED)
color = PERF_COLOR_RED;
else {
if (fabs(percent) > MIN_GREEN)
color = PERF_COLOR_GREEN;
}
return color;
}
int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
{
int r;
perf: Enable more compiler warnings Related to a shadowed variable bug fix Valdis Kletnieks noticed that perf does not get built with -Wshadow, which could have helped us avoid the bug. So enable -Wshadow and also enable the following warnings on perf builds, in addition to the already enabled -Wall -Wextra -std=gnu99 warnings: -Wcast-align -Wformat=2 -Wshadow -Winit-self -Wpacked -Wredundant-decls -Wstack-protector -Wstrict-aliasing=3 -Wswitch-default -Wswitch-enum -Wno-system-headers -Wundef -Wvolatile-register-var -Wwrite-strings -Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement And change/fix the perf code to build cleanly under GCC 4.3.2. The list of warnings enablement is rather arbitrary: it's based on my (quick) reading of the GCC manpages and trying them on perf. I categorized the warnings based on individually enabling them and looking whether they trigger something in the perf build. If i liked those warnings (i.e. if they trigger for something that arguably could be improved) i enabled the warning. If the warnings seemed to come from language laywers spamming the build with tons of nuisance warnings i generally kept them off. Most of the sign conversion related warnings were in this category. (A second patch enabling some of the sign warnings might be welcome - sign bugs can be nasty.) I also kept warnings that seem to make sense from their manpage description and which produced no actual warnings on our code base. These warnings might still be turned off if they end up being a nuisance. I also left out a few warnings that are not supported in older compilers. [ Note that these changes might break the build on older compilers i did not test, or on non-x86 architectures that produce different warnings, so more testing would be welcome. ] Reported-by: Valdis.Kletnieks@vt.edu Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-08-15 18:26:57 +08:00
const char *color;
color = get_percent_color(percent);
r = color_fprintf(fp, color, fmt, percent);
return r;
}
int value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
{
const char *color = get_percent_color(value);
return color_snprintf(bf, size, color, fmt, value);
}
int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
{
va_list args;
double percent;
va_start(args, fmt);
percent = va_arg(args, double);
va_end(args);
return value_color_snprintf(bf, size, fmt, percent);
}
int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
{
va_list args;
int len;
double percent;
const char *color;
va_start(args, fmt);
len = va_arg(args, int);
percent = va_arg(args, double);
va_end(args);
color = get_percent_color(percent);
return color_snprintf(bf, size, color, fmt, len, percent);
}