1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kernel.h>
11 int perf_use_color_default = -1;
13 int perf_config_colorbool(const char *var, const char *value, int stdout_is_tty)
16 if (!strcasecmp(value, "never"))
18 if (!strcasecmp(value, "always"))
20 if (!strcasecmp(value, "auto"))
24 /* Missing or explicit false to turn off colorization */
25 if (!perf_config_bool(var, value))
28 /* any normal truth value defaults to 'auto' */
30 if (stdout_is_tty < 0)
31 stdout_is_tty = isatty(1);
32 if (stdout_is_tty || pager_in_use()) {
33 char *term = getenv("TERM");
34 if (term && strcmp(term, "dumb"))
40 int perf_color_default_config(const char *var, const char *value,
41 void *cb __maybe_unused)
43 if (!strcmp(var, "color.ui")) {
44 perf_use_color_default = perf_config_colorbool(var, value, -1);
51 static int __color_vsnprintf(char *bf, size_t size, const char *color,
52 const char *fmt, va_list args, const char *trail)
59 if (perf_use_color_default < 0) {
60 if (isatty(1) || pager_in_use())
61 perf_use_color_default = 1;
63 perf_use_color_default = 0;
66 if (perf_use_color_default && *color)
67 r += scnprintf(bf, size, "%s", color);
68 r += vscnprintf(bf + r, size - r, fmt, args);
69 if (perf_use_color_default && *color)
70 r += scnprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
72 r += scnprintf(bf + r, size - r, "%s", trail);
76 /* Colors are not included in return value */
77 static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
85 if (perf_use_color_default < 0) {
86 if (isatty(fileno(fp)) || pager_in_use())
87 perf_use_color_default = 1;
89 perf_use_color_default = 0;
92 if (perf_use_color_default && *color)
93 fprintf(fp, "%s", color);
94 r += vfprintf(fp, fmt, args);
95 if (perf_use_color_default && *color)
96 fprintf(fp, "%s", PERF_COLOR_RESET);
100 int color_vsnprintf(char *bf, size_t size, const char *color,
101 const char *fmt, va_list args)
103 return __color_vsnprintf(bf, size, color, fmt, args, NULL);
106 int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args)
108 return __color_vfprintf(fp, color, fmt, args);
111 int color_snprintf(char *bf, size_t size, const char *color,
112 const char *fmt, ...)
118 r = color_vsnprintf(bf, size, color, fmt, args);
123 int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
129 r = color_vfprintf(fp, color, fmt, args);
135 * This function splits the buffer by newlines and colors the lines individually.
137 * Returns 0 on success.
139 int color_fwrite_lines(FILE *fp, const char *color,
140 size_t count, const char *buf)
143 return fwrite(buf, count, 1, fp) != 1;
146 char *p = memchr(buf, '\n', count);
148 if (p != buf && (fputs(color, fp) < 0 ||
149 fwrite(buf, p ? (size_t)(p - buf) : count, 1, fp) != 1 ||
150 fputs(PERF_COLOR_RESET, fp) < 0))
154 if (fputc('\n', fp) < 0)
156 count -= p + 1 - buf;
162 const char *get_percent_color(double percent)
164 const char *color = PERF_COLOR_NORMAL;
167 * We color high-overhead entries in red, mid-overhead
168 * entries in green - and keep the low overhead places
171 if (fabs(percent) >= MIN_RED)
172 color = PERF_COLOR_RED;
174 if (fabs(percent) > MIN_GREEN)
175 color = PERF_COLOR_GREEN;
180 int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
185 color = get_percent_color(percent);
186 r = color_fprintf(fp, color, fmt, percent);
191 int value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
193 const char *color = get_percent_color(value);
194 return color_snprintf(bf, size, color, fmt, value);
197 int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
203 percent = va_arg(args, double);
205 return value_color_snprintf(bf, size, fmt, percent);
208 int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
216 len = va_arg(args, int);
217 percent = va_arg(args, double);
220 color = get_percent_color(percent);
221 return color_snprintf(bf, size, color, fmt, len, percent);