1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kernel.h>
10 int perf_use_color_default = -1;
12 static int __color_vsnprintf(char *bf, size_t size, const char *color,
13 const char *fmt, va_list args, const char *trail)
20 if (perf_use_color_default < 0) {
21 if (isatty(1) || pager_in_use())
22 perf_use_color_default = 1;
24 perf_use_color_default = 0;
27 if (perf_use_color_default && *color)
28 r += scnprintf(bf, size, "%s", color);
29 r += vscnprintf(bf + r, size - r, fmt, args);
30 if (perf_use_color_default && *color)
31 r += scnprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
33 r += scnprintf(bf + r, size - r, "%s", trail);
37 /* Colors are not included in return value */
38 static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
46 if (perf_use_color_default < 0) {
47 if (isatty(fileno(fp)) || pager_in_use())
48 perf_use_color_default = 1;
50 perf_use_color_default = 0;
53 if (perf_use_color_default && *color)
54 fprintf(fp, "%s", color);
55 r += vfprintf(fp, fmt, args);
56 if (perf_use_color_default && *color)
57 fprintf(fp, "%s", PERF_COLOR_RESET);
61 int color_vsnprintf(char *bf, size_t size, const char *color,
62 const char *fmt, va_list args)
64 return __color_vsnprintf(bf, size, color, fmt, args, NULL);
67 int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args)
69 return __color_vfprintf(fp, color, fmt, args);
72 int color_snprintf(char *bf, size_t size, const char *color,
79 r = color_vsnprintf(bf, size, color, fmt, args);
84 int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
90 r = color_vfprintf(fp, color, fmt, args);
96 * This function splits the buffer by newlines and colors the lines individually.
98 * Returns 0 on success.
100 int color_fwrite_lines(FILE *fp, const char *color,
101 size_t count, const char *buf)
104 return fwrite(buf, count, 1, fp) != 1;
107 char *p = memchr(buf, '\n', count);
109 if (p != buf && (fputs(color, fp) < 0 ||
110 fwrite(buf, p ? (size_t)(p - buf) : count, 1, fp) != 1 ||
111 fputs(PERF_COLOR_RESET, fp) < 0))
115 if (fputc('\n', fp) < 0)
117 count -= p + 1 - buf;
123 const char *get_percent_color(double percent)
125 const char *color = PERF_COLOR_NORMAL;
128 * We color high-overhead entries in red, mid-overhead
129 * entries in green - and keep the low overhead places
132 if (fabs(percent) >= MIN_RED)
133 color = PERF_COLOR_RED;
135 if (fabs(percent) > MIN_GREEN)
136 color = PERF_COLOR_GREEN;
141 int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
146 color = get_percent_color(percent);
147 r = color_fprintf(fp, color, fmt, percent);
152 int value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
154 const char *color = get_percent_color(value);
155 return color_snprintf(bf, size, color, fmt, value);
158 int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
164 percent = va_arg(args, double);
166 return value_color_snprintf(bf, size, fmt, percent);
169 int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
177 len = va_arg(args, int);
178 percent = va_arg(args, double);
181 color = get_percent_color(percent);
182 return color_snprintf(bf, size, color, fmt, len, percent);