aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/util/color.c
blob: 521c38a7919096a31d003c833ce46b154e9f58de (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
#include "cache.h"
#include "color.h"

int perf_use_color_default = -1;

static int parse_color(const char *name, int len)
{
	static const char * const color_names[] = {
		"normal", "black", "red", "green", "yellow",
		"blue", "magenta", "cyan", "white"
	};
	char *end;
	int i;

	for (i = 0; i < (int)ARRAY_SIZE(color_names); i++) {
		const char *str = color_names[i];
		if (!strncasecmp(name, str, len) && !str[len])
			return i - 1;
	}
	i = strtol(name, &end, 10);
	if (end - name == len && i >= -1 && i <= 255)
		return i;
	return -2;
}

static int parse_attr(const char *name, int len)
{
	static const int attr_values[] = { 1, 2, 4, 5, 7 };
	static const char * const attr_names[] = {
		"bold", "dim", "ul", "blink", "reverse"
	};
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
		const char *str = attr_names[i];
		if (!strncasecmp(name, str, len) && !str[len])
			return attr_values[i];
	}
	return -1;
}

void color_parse(const char *value, const char *var, char *dst)
{
	color_parse_mem(value, strlen(value), var, dst);
}

void color_parse_mem(const char *value, int value_len, const char *var,
		char *dst)
{
	const char *ptr = value;
	int len = value_len;
	int attr = -1;
	int fg = -2;
	int bg = -2;

	if (!strncasecmp(value, "reset", len)) {
		strcpy(dst, PERF_COLOR_RESET);
		return;
	}

	/* [fg [bg]] [attr] */
	while (len > 0) {
		const char *word = ptr;
		int val, wordlen = 0;

		while (len > 0 && !isspace(word[wordlen])) {
			wordlen++;
			len--;
		}

		ptr = word + wordlen;
		while (len > 0 && isspace(*ptr)) {
			ptr++;
			len--;
		}

		val = parse_color(word, wordlen);
		if (val >= -1) {
			if (fg == -2) {
				fg = val;
				continue;
			}
			if (bg == -2) {
				bg = val;
				continue;
			}
			goto bad;
		}
		val = parse_attr(word, wordlen);
		if (val < 0 || attr != -1)
			goto bad;
		attr = val;
	}

	if (attr >= 0 || fg >= 0 || bg >= 0) {
		int sep = 0;

		*dst++ = '\033';
		*dst++ = '[';
		if (attr >= 0) {
			*dst++ = '0' + attr;
			sep++;
		}
		if (fg >= 0) {
			if (sep++)
				*dst++ = ';';
			if (fg < 8) {
				*dst++ = '3';
				*dst++ = '0' + fg;
			} else {
				dst += sprintf(dst, "38;5;%d", fg);
			}
		}
		if (bg >= 0) {
			if (sep++)
				*dst++ = ';';
			if (bg < 8) {
				*dst++ = '4';
				*dst++ = '0' + bg;
			} else {
				dst += sprintf(dst, "48;5;%d", bg);
			}
		}
		*dst++ = 'm';
	}
	*dst = 0;
	return;
bad:
	die("bad color value '%.*s' for variable '%s'", value_len, value, var);
}

int perf_config_colorbool(const char *var, const char *value, int stdout_is_tty)
{
	if (value) {
		if (!strcasecmp(value, "never"))
			return 0;
		if (!strcasecmp(value, "always"))
			return 1;
		if (!strcasecmp(value, "auto"))
			goto auto_color;
	}

	/* Missing or explicit false to turn off colorization */
	if (!perf_config_bool(var, value))
		return 0;

	/* any normal truth value defaults to 'auto' */
 auto_color:
	if (stdout_is_tty < 0)
		stdout_is_tty = isatty(1);
	if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
		char *term = getenv("TERM");
		if (term && strcmp(term, "dumb"))
			return 1;
	}
	return 0;
}

int perf_color_default_config(const char *var, const char *value, void *cb)
{
	if (!strcmp(var, "color.ui")) {
		perf_use_color_default = perf_config_colorbool(var, value, -1);
		return 0;
	}

	return perf_default_config(var, value, cb);
}

static int __color_vsnprintf(char *bf, size_t size, const char *color,
			     const char *fmt, va_list args, const char *trail)
{
	int r = 0;

	/*
	 * Auto-detect:
	 */
	if (perf_use_color_default < 0) {
		if (isatty(1) || pager_in_use())
			perf_use_color_default = 1;
		else
			perf_use_color_default = 0;
	}

	if (perf_use_color_default && *color)
		r += snprintf(bf, size, "%s", color);
	r += vsnprintf(bf + r, size - r, fmt, args);
	if (perf_use_color_default && *color)
		r += snprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
	if (trail)
		r += snprintf(bf + r, size - r, "%s", trail);
	return r;
}

static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
		va_list args, const char *trail)
{
	int r = 0;

	/*
	 * Auto-detect:
	 */
	if (perf_use_color_default < 0) {
		if (isatty(fileno(fp)) || pager_in_use())
			perf_use_color_default = 1;
		else
			perf_use_color_default = 0;
	}

	if (perf_use_color_default && *color)
		r += fprintf(fp, "%s", color);
	r += vfprintf(fp, fmt, args);
	if (perf_use_color_default && *color)
		r += fprintf(fp, "%s", PERF_COLOR_RESET);
	if (trail)
		r += fprintf(fp, "%s", trail);
	return r;
}

int color_vsnprintf(char *bf, size_t size, const char *color,
		    const char *fmt, va_list args)
{
	return __color_vsnprintf(bf, size, color, fmt, args, NULL);
}

int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args)
{
	return __color_vfprintf(fp, color, fmt, args, NULL);
}

int color_snprintf(char *bf, size_t size, const char *color,
		   const char *fmt, ...)
{
	va_list args;
	int r;

	va_start(args, fmt);
	r = color_vsnprintf(bf, size, color, fmt, args);
	va_end(args);
	return r;
}

int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
{
	va_list args;
	int r;

	va_start(args, fmt);
	r = color_vfprintf(fp, color, fmt, args);
	va_end(args);
	return r;
}

int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
{
	va_list args;
	int r;
	va_start(args, fmt);
	r = __color_vfprintf(fp, color, fmt, args, "\n");
	va_end(args);
	return r;
}

/*
 * This function splits the buffer by newlines and colors the lines individually.
 *
 * Returns 0 on success.
 */
int color_fwrite_lines(FILE *fp, const char *color,
		size_t count, const char *buf)
{
	if (!*color)
		return fwrite(buf, count, 1, fp) != 1;

	while (count) {
		char *p = memchr(buf, '\n', count);

		if (p != buf && (fputs(color, fp) < 0 ||
				fwrite(buf, p ? (size_t)(p - buf) : count, 1, fp) != 1 ||
				fputs(PERF_COLOR_RESET, fp) < 0))
			return -1;
		if (!p)
			return 0;
		if (fputc('\n', fp) < 0)
			return -1;
		count -= p + 1 - buf;
		buf = p + 1;
	}
	return 0;
}

const char *get_percent_color(double percent)
{
	const char *color = PERF_COLOR_NORMAL;

	/*
	 * We color high-overhead entries in red, mid-overhead
	 * entries in green - and keep the low overhead places
	 * normal:
	 */
	if (percent >= MIN_RED)
		color = PERF_COLOR_RED;
	else {
		if (percent > MIN_GREEN)
			color = PERF_COLOR_GREEN;
	}
	return color;
}

int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
{
	int r;
	const char *color;

	color = get_percent_color(percent);
	r = color_fprintf(fp, color, fmt, percent);

	return r;
}

int percent_color_snprintf(char *bf, size_t size, const char *fmt, double percent)
{
	const char *color = get_percent_color(percent);
	return color_snprintf(bf, size, color, fmt, percent);
}