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- // SPDX-License-Identifier: GPL-2.0
- #include <linux/kernel.h>
- #include <subcmd/pager.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include "color.h"
- #include <math.h>
- #include <unistd.h>
- int perf_use_color_default = -1;
- 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 += scnprintf(bf, size, "%s", color);
- r += vscnprintf(bf + r, size - r, fmt, args);
- if (perf_use_color_default && *color)
- r += scnprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
- if (trail)
- r += scnprintf(bf + r, size - r, "%s", trail);
- return r;
- }
- /* Colors are not included in return value */
- static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
- va_list args)
- {
- 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)
- fprintf(fp, "%s", color);
- r += vfprintf(fp, fmt, args);
- if (perf_use_color_default && *color)
- fprintf(fp, "%s", PERF_COLOR_RESET);
- 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);
- }
- 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;
- }
- /*
- * 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 (fabs(percent) >= MIN_RED)
- color = PERF_COLOR_RED;
- else {
- if (fabs(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 value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
- {
- const char *color = get_percent_color(value);
- return color_snprintf(bf, size, color, fmt, value);
- }
- int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
- {
- va_list args;
- double percent;
- va_start(args, fmt);
- percent = va_arg(args, double);
- va_end(args);
- return value_color_snprintf(bf, size, fmt, percent);
- }
- int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
- {
- va_list args;
- int len;
- double percent;
- const char *color;
- va_start(args, fmt);
- len = va_arg(args, int);
- percent = va_arg(args, double);
- va_end(args);
- color = get_percent_color(percent);
- return color_snprintf(bf, size, color, fmt, len, percent);
- }
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