1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kernel.h>
3 #include <subcmd/pager.h>
11 int perf_use_color_default = -1;
13 static int __color_vsnprintf(char *bf, size_t size, const char *color,
14 const char *fmt, va_list args, const char *trail)
21 if (perf_use_color_default < 0) {
22 if (isatty(1) || pager_in_use())
23 perf_use_color_default = 1;
25 perf_use_color_default = 0;
28 if (perf_use_color_default && *color)
29 r += scnprintf(bf, size, "%s", color);
30 r += vscnprintf(bf + r, size - r, fmt, args);
31 if (perf_use_color_default && *color)
32 r += scnprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
34 r += scnprintf(bf + r, size - r, "%s", trail);
38 /* Colors are not included in return value */
39 static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
47 if (perf_use_color_default < 0) {
48 if (isatty(fileno(fp)) || pager_in_use())
49 perf_use_color_default = 1;
51 perf_use_color_default = 0;
54 if (perf_use_color_default && *color)
55 fprintf(fp, "%s", color);
56 r += vfprintf(fp, fmt, args);
57 if (perf_use_color_default && *color)
58 fprintf(fp, "%s", PERF_COLOR_RESET);
62 int color_vsnprintf(char *bf, size_t size, const char *color,
63 const char *fmt, va_list args)
65 return __color_vsnprintf(bf, size, color, fmt, args, NULL);
68 int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args)
70 return __color_vfprintf(fp, color, fmt, args);
73 int color_snprintf(char *bf, size_t size, const char *color,
80 r = color_vsnprintf(bf, size, color, fmt, args);
85 int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
91 r = color_vfprintf(fp, color, fmt, args);
97 * This function splits the buffer by newlines and colors the lines individually.
99 * Returns 0 on success.
101 int color_fwrite_lines(FILE *fp, const char *color,
102 size_t count, const char *buf)
105 return fwrite(buf, count, 1, fp) != 1;
108 char *p = memchr(buf, '\n', count);
110 if (p != buf && (fputs(color, fp) < 0 ||
111 fwrite(buf, p ? (size_t)(p - buf) : count, 1, fp) != 1 ||
112 fputs(PERF_COLOR_RESET, fp) < 0))
116 if (fputc('\n', fp) < 0)
118 count -= p + 1 - buf;
124 const char *get_percent_color(double percent)
126 const char *color = PERF_COLOR_NORMAL;
129 * We color high-overhead entries in red, mid-overhead
130 * entries in green - and keep the low overhead places
133 if (fabs(percent) >= MIN_RED)
134 color = PERF_COLOR_RED;
136 if (fabs(percent) > MIN_GREEN)
137 color = PERF_COLOR_GREEN;
142 int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
147 color = get_percent_color(percent);
148 r = color_fprintf(fp, color, fmt, percent);
153 int value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
155 const char *color = get_percent_color(value);
156 return color_snprintf(bf, size, color, fmt, value);
159 int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
165 percent = va_arg(args, double);
167 return value_color_snprintf(bf, size, fmt, percent);
170 int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
178 len = va_arg(args, int);
179 percent = va_arg(args, double);
182 color = get_percent_color(percent);
183 return color_snprintf(bf, size, color, fmt, len, percent);