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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
96/*
97 * This function splits the buffer by newlines and colors the lines individually.
98 *
99 * Returns 0 on success.
100 */
101int color_fwrite_lines(FILE *fp, const char *color,
102 size_t count, const char *buf)
103{
104 if (!*color)
105 return fwrite(buf, count, 1, fp) != 1;
106
107 while (count) {
108 char *p = memchr(buf, '\n', count);
109
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))
113 return -1;
114 if (!p)
115 return 0;
116 if (fputc('\n', fp) < 0)
117 return -1;
118 count -= p + 1 - buf;
119 buf = p + 1;
120 }
121 return 0;
122}
123
124const char *get_percent_color(double percent)
125{
126 const char *color = PERF_COLOR_NORMAL;
127
128 /*
129 * We color high-overhead entries in red, mid-overhead
130 * entries in green - and keep the low overhead places
131 * normal:
132 */
133 if (fabs(percent) >= MIN_RED)
134 color = PERF_COLOR_RED;
135 else {
136 if (fabs(percent) > MIN_GREEN)
137 color = PERF_COLOR_GREEN;
138 }
139 return color;
140}
141
142int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
143{
144 int r;
145 const char *color;
146
147 color = get_percent_color(percent);
148 r = color_fprintf(fp, color, fmt, percent);
149
150 return r;
151}
152
153int value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
154{
155 const char *color = get_percent_color(value);
156 return color_snprintf(bf, size, color, fmt, value);
157}
158
159int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
160{
161 va_list args;
162 double percent;
163
164 va_start(args, fmt);
165 percent = va_arg(args, double);
166 va_end(args);
167 return value_color_snprintf(bf, size, fmt, percent);
168}
169
170int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
171{
172 va_list args;
173 int len;
174 double percent;
175 const char *color;
176
177 va_start(args, fmt);
178 len = va_arg(args, int);
179 percent = va_arg(args, double);
180 va_end(args);
181
182 color = get_percent_color(percent);
183 return color_snprintf(bf, size, color, fmt, len, percent);
184}
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
96/*
97 * This function splits the buffer by newlines and colors the lines individually.
98 *
99 * Returns 0 on success.
100 */
101int color_fwrite_lines(FILE *fp, const char *color,
102 size_t count, const char *buf)
103{
104 if (!*color)
105 return fwrite(buf, count, 1, fp) != 1;
106
107 while (count) {
108 char *p = memchr(buf, '\n', count);
109
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))
113 return -1;
114 if (!p)
115 return 0;
116 if (fputc('\n', fp) < 0)
117 return -1;
118 count -= p + 1 - buf;
119 buf = p + 1;
120 }
121 return 0;
122}
123
124const char *get_percent_color(double percent)
125{
126 const char *color = PERF_COLOR_NORMAL;
127
128 /*
129 * We color high-overhead entries in red, mid-overhead
130 * entries in green - and keep the low overhead places
131 * normal:
132 */
133 if (fabs(percent) >= MIN_RED)
134 color = PERF_COLOR_RED;
135 else {
136 if (fabs(percent) > MIN_GREEN)
137 color = PERF_COLOR_GREEN;
138 }
139 return color;
140}
141
142int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
143{
144 int r;
145 const char *color;
146
147 color = get_percent_color(percent);
148 r = color_fprintf(fp, color, fmt, percent);
149
150 return r;
151}
152
153int value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
154{
155 const char *color = get_percent_color(value);
156 return color_snprintf(bf, size, color, fmt, value);
157}
158
159int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
160{
161 va_list args;
162 double percent;
163
164 va_start(args, fmt);
165 percent = va_arg(args, double);
166 va_end(args);
167 return value_color_snprintf(bf, size, fmt, percent);
168}
169
170int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
171{
172 va_list args;
173 int len;
174 double percent;
175 const char *color;
176
177 va_start(args, fmt);
178 len = va_arg(args, int);
179 percent = va_arg(args, double);
180 va_end(args);
181
182 color = get_percent_color(percent);
183 return color_snprintf(bf, size, color, fmt, len, percent);
184}