Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/kernel.h>
3#include <subcmd/pager.h>
4#include <stdlib.h>
5#include <stdio.h>
6#include <string.h>
7#include "color.h"
8#include <math.h>
9#include <unistd.h>
10
11int perf_use_color_default = -1;
12
13static int __color_vsnprintf(char *bf, size_t size, const char *color,
14 const char *fmt, va_list args, const char *trail)
15{
16 int r = 0;
17
18 /*
19 * Auto-detect:
20 */
21 if (perf_use_color_default < 0) {
22 if (isatty(1) || pager_in_use())
23 perf_use_color_default = 1;
24 else
25 perf_use_color_default = 0;
26 }
27
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);
33 if (trail)
34 r += scnprintf(bf + r, size - r, "%s", trail);
35 return r;
36}
37
38/* Colors are not included in return value */
39static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
40 va_list args)
41{
42 int r = 0;
43
44 /*
45 * Auto-detect:
46 */
47 if (perf_use_color_default < 0) {
48 if (isatty(fileno(fp)) || pager_in_use())
49 perf_use_color_default = 1;
50 else
51 perf_use_color_default = 0;
52 }
53
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);
59 return r;
60}
61
62int color_vsnprintf(char *bf, size_t size, const char *color,
63 const char *fmt, va_list args)
64{
65 return __color_vsnprintf(bf, size, color, fmt, args, NULL);
66}
67
68int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args)
69{
70 return __color_vfprintf(fp, color, fmt, args);
71}
72
73int color_snprintf(char *bf, size_t size, const char *color,
74 const char *fmt, ...)
75{
76 va_list args;
77 int r;
78
79 va_start(args, fmt);
80 r = color_vsnprintf(bf, size, color, fmt, args);
81 va_end(args);
82 return r;
83}
84
85int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
86{
87 va_list args;
88 int r;
89
90 va_start(args, fmt);
91 r = color_vfprintf(fp, color, fmt, args);
92 va_end(args);
93 return r;
94}
95
96const char *get_percent_color(double percent)
97{
98 const char *color = PERF_COLOR_NORMAL;
99
100 /*
101 * We color high-overhead entries in red, mid-overhead
102 * entries in green - and keep the low overhead places
103 * normal:
104 */
105 if (fabs(percent) >= MIN_RED)
106 color = PERF_COLOR_RED;
107 else {
108 if (fabs(percent) > MIN_GREEN)
109 color = PERF_COLOR_GREEN;
110 }
111 return color;
112}
113
114int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
115{
116 int r;
117 const char *color;
118
119 color = get_percent_color(percent);
120 r = color_fprintf(fp, color, fmt, percent);
121
122 return r;
123}
124
125int value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
126{
127 const char *color = get_percent_color(value);
128 return color_snprintf(bf, size, color, fmt, value);
129}
130
131int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
132{
133 va_list args;
134 double percent;
135
136 va_start(args, fmt);
137 percent = va_arg(args, double);
138 va_end(args);
139 return value_color_snprintf(bf, size, fmt, percent);
140}
141
142int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
143{
144 va_list args;
145 int len;
146 double percent;
147 const char *color;
148
149 va_start(args, fmt);
150 len = va_arg(args, int);
151 percent = va_arg(args, double);
152 va_end(args);
153
154 color = get_percent_color(percent);
155 return color_snprintf(bf, size, color, fmt, len, percent);
156}