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![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
Several places were expecting that the value returned was the number of characters printed, not what would be printed if there was space. Fix it by using the scnprintf and vscnprintf variants we inherited from the kernel sources. Some corner cases where the number of printed characters were not accounted were fixed too. Reported-by: Anton Blanchard <anton@samba.org> Cc: Anton Blanchard <anton@samba.org> Cc: Eric B Munson <emunson@mgebm.net> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Yanmin Zhang <yanmin_zhang@linux.intel.com> Cc: stable@kernel.org Link: http://lkml.kernel.org/n/tip-kwxo2eh29cxmd8ilixi2005x@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
325 lines
6.6 KiB
C
325 lines
6.6 KiB
C
#include <linux/kernel.h>
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#include "cache.h"
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#include "color.h"
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int perf_use_color_default = -1;
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static int parse_color(const char *name, int len)
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{
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static const char * const color_names[] = {
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"normal", "black", "red", "green", "yellow",
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"blue", "magenta", "cyan", "white"
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};
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char *end;
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int i;
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for (i = 0; i < (int)ARRAY_SIZE(color_names); i++) {
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const char *str = color_names[i];
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if (!strncasecmp(name, str, len) && !str[len])
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return i - 1;
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}
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i = strtol(name, &end, 10);
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if (end - name == len && i >= -1 && i <= 255)
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return i;
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return -2;
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}
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static int parse_attr(const char *name, int len)
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{
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static const int attr_values[] = { 1, 2, 4, 5, 7 };
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static const char * const attr_names[] = {
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"bold", "dim", "ul", "blink", "reverse"
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};
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
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const char *str = attr_names[i];
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if (!strncasecmp(name, str, len) && !str[len])
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return attr_values[i];
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}
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return -1;
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}
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void color_parse(const char *value, const char *var, char *dst)
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{
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color_parse_mem(value, strlen(value), var, dst);
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}
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void color_parse_mem(const char *value, int value_len, const char *var,
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char *dst)
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{
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const char *ptr = value;
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int len = value_len;
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int attr = -1;
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int fg = -2;
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int bg = -2;
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if (!strncasecmp(value, "reset", len)) {
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strcpy(dst, PERF_COLOR_RESET);
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return;
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}
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/* [fg [bg]] [attr] */
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while (len > 0) {
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const char *word = ptr;
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int val, wordlen = 0;
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while (len > 0 && !isspace(word[wordlen])) {
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wordlen++;
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len--;
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}
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ptr = word + wordlen;
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while (len > 0 && isspace(*ptr)) {
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ptr++;
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len--;
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}
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val = parse_color(word, wordlen);
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if (val >= -1) {
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if (fg == -2) {
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fg = val;
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continue;
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}
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if (bg == -2) {
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bg = val;
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continue;
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}
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goto bad;
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}
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val = parse_attr(word, wordlen);
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if (val < 0 || attr != -1)
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goto bad;
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attr = val;
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}
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if (attr >= 0 || fg >= 0 || bg >= 0) {
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int sep = 0;
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*dst++ = '\033';
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*dst++ = '[';
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if (attr >= 0) {
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*dst++ = '0' + attr;
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sep++;
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}
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if (fg >= 0) {
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if (sep++)
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*dst++ = ';';
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if (fg < 8) {
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*dst++ = '3';
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*dst++ = '0' + fg;
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} else {
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dst += sprintf(dst, "38;5;%d", fg);
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}
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}
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if (bg >= 0) {
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if (sep++)
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*dst++ = ';';
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if (bg < 8) {
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*dst++ = '4';
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*dst++ = '0' + bg;
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} else {
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dst += sprintf(dst, "48;5;%d", bg);
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}
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}
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*dst++ = 'm';
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}
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*dst = 0;
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return;
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bad:
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die("bad color value '%.*s' for variable '%s'", value_len, value, var);
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}
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int perf_config_colorbool(const char *var, const char *value, int stdout_is_tty)
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{
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if (value) {
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if (!strcasecmp(value, "never"))
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return 0;
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if (!strcasecmp(value, "always"))
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return 1;
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if (!strcasecmp(value, "auto"))
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goto auto_color;
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}
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/* Missing or explicit false to turn off colorization */
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if (!perf_config_bool(var, value))
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return 0;
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/* any normal truth value defaults to 'auto' */
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auto_color:
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if (stdout_is_tty < 0)
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stdout_is_tty = isatty(1);
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if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
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char *term = getenv("TERM");
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if (term && strcmp(term, "dumb"))
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return 1;
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}
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return 0;
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}
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int perf_color_default_config(const char *var, const char *value, void *cb)
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{
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if (!strcmp(var, "color.ui")) {
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perf_use_color_default = perf_config_colorbool(var, value, -1);
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return 0;
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}
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return perf_default_config(var, value, cb);
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}
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static int __color_vsnprintf(char *bf, size_t size, const char *color,
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const char *fmt, va_list args, const char *trail)
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{
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int r = 0;
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/*
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* Auto-detect:
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*/
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if (perf_use_color_default < 0) {
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if (isatty(1) || pager_in_use())
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perf_use_color_default = 1;
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else
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perf_use_color_default = 0;
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}
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if (perf_use_color_default && *color)
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r += scnprintf(bf, size, "%s", color);
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r += vscnprintf(bf + r, size - r, fmt, args);
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if (perf_use_color_default && *color)
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r += scnprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
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if (trail)
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r += scnprintf(bf + r, size - r, "%s", trail);
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return r;
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}
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static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
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va_list args, const char *trail)
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{
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int r = 0;
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/*
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* Auto-detect:
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*/
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if (perf_use_color_default < 0) {
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if (isatty(fileno(fp)) || pager_in_use())
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perf_use_color_default = 1;
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else
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perf_use_color_default = 0;
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}
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if (perf_use_color_default && *color)
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r += fprintf(fp, "%s", color);
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r += vfprintf(fp, fmt, args);
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if (perf_use_color_default && *color)
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r += fprintf(fp, "%s", PERF_COLOR_RESET);
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if (trail)
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r += fprintf(fp, "%s", trail);
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return r;
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}
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int color_vsnprintf(char *bf, size_t size, const char *color,
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const char *fmt, va_list args)
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{
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return __color_vsnprintf(bf, size, color, fmt, args, NULL);
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}
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int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args)
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{
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return __color_vfprintf(fp, color, fmt, args, NULL);
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}
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int color_snprintf(char *bf, size_t size, const char *color,
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const char *fmt, ...)
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{
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va_list args;
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int r;
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va_start(args, fmt);
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r = color_vsnprintf(bf, size, color, fmt, args);
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va_end(args);
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return r;
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}
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int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
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{
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va_list args;
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int r;
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va_start(args, fmt);
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r = color_vfprintf(fp, color, fmt, args);
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va_end(args);
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return r;
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}
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int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
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{
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va_list args;
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int r;
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va_start(args, fmt);
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r = __color_vfprintf(fp, color, fmt, args, "\n");
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va_end(args);
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return r;
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}
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/*
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* This function splits the buffer by newlines and colors the lines individually.
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*
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* Returns 0 on success.
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*/
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int color_fwrite_lines(FILE *fp, const char *color,
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size_t count, const char *buf)
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{
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if (!*color)
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return fwrite(buf, count, 1, fp) != 1;
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while (count) {
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char *p = memchr(buf, '\n', count);
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if (p != buf && (fputs(color, fp) < 0 ||
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fwrite(buf, p ? (size_t)(p - buf) : count, 1, fp) != 1 ||
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fputs(PERF_COLOR_RESET, fp) < 0))
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return -1;
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if (!p)
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return 0;
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if (fputc('\n', fp) < 0)
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return -1;
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count -= p + 1 - buf;
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buf = p + 1;
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}
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return 0;
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}
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const char *get_percent_color(double percent)
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{
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const char *color = PERF_COLOR_NORMAL;
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/*
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* We color high-overhead entries in red, mid-overhead
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* entries in green - and keep the low overhead places
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* normal:
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*/
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if (percent >= MIN_RED)
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color = PERF_COLOR_RED;
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else {
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if (percent > MIN_GREEN)
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color = PERF_COLOR_GREEN;
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}
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return color;
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}
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int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
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{
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int r;
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const char *color;
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color = get_percent_color(percent);
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r = color_fprintf(fp, color, fmt, percent);
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return r;
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}
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int percent_color_snprintf(char *bf, size_t size, const char *fmt, double percent)
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{
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const char *color = get_percent_color(percent);
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return color_snprintf(bf, size, color, fmt, percent);
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}
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