185 lines
3.9 KiB
C
185 lines
3.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include <subcmd/pager.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "color.h"
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#include <math.h>
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#include <unistd.h>
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int perf_use_color_default = -1;
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static int __color_vsnprintf(char *bf, size_t size, const char *color,
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const char *fmt, va_list args, const char *trail)
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{
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int r = 0;
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/*
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* Auto-detect:
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*/
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if (perf_use_color_default < 0) {
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if (isatty(1) || pager_in_use())
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perf_use_color_default = 1;
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else
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perf_use_color_default = 0;
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}
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if (perf_use_color_default && *color)
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r += scnprintf(bf, size, "%s", color);
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r += vscnprintf(bf + r, size - r, fmt, args);
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if (perf_use_color_default && *color)
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r += scnprintf(bf + r, size - r, "%s", PERF_COLOR_RESET);
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if (trail)
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r += scnprintf(bf + r, size - r, "%s", trail);
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return r;
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}
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/* Colors are not included in return value */
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static int __color_vfprintf(FILE *fp, const char *color, const char *fmt,
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va_list args)
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{
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int r = 0;
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/*
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* Auto-detect:
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*/
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if (perf_use_color_default < 0) {
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if (isatty(fileno(fp)) || pager_in_use())
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perf_use_color_default = 1;
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else
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perf_use_color_default = 0;
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}
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if (perf_use_color_default && *color)
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fprintf(fp, "%s", color);
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r += vfprintf(fp, fmt, args);
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if (perf_use_color_default && *color)
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fprintf(fp, "%s", PERF_COLOR_RESET);
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return r;
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}
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int color_vsnprintf(char *bf, size_t size, const char *color,
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const char *fmt, va_list args)
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{
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return __color_vsnprintf(bf, size, color, fmt, args, NULL);
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}
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int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args)
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{
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return __color_vfprintf(fp, color, fmt, args);
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}
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int color_snprintf(char *bf, size_t size, const char *color,
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const char *fmt, ...)
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{
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va_list args;
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int r;
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va_start(args, fmt);
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r = color_vsnprintf(bf, size, color, fmt, args);
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va_end(args);
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return r;
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}
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int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
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{
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va_list args;
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int r;
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va_start(args, fmt);
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r = color_vfprintf(fp, color, fmt, args);
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va_end(args);
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return r;
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}
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/*
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* This function splits the buffer by newlines and colors the lines individually.
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*
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* Returns 0 on success.
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*/
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int color_fwrite_lines(FILE *fp, const char *color,
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size_t count, const char *buf)
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{
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if (!*color)
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return fwrite(buf, count, 1, fp) != 1;
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while (count) {
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char *p = memchr(buf, '\n', count);
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if (p != buf && (fputs(color, fp) < 0 ||
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fwrite(buf, p ? (size_t)(p - buf) : count, 1, fp) != 1 ||
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fputs(PERF_COLOR_RESET, fp) < 0))
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return -1;
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if (!p)
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return 0;
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if (fputc('\n', fp) < 0)
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return -1;
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count -= p + 1 - buf;
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buf = p + 1;
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}
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return 0;
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}
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const char *get_percent_color(double percent)
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{
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const char *color = PERF_COLOR_NORMAL;
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/*
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* We color high-overhead entries in red, mid-overhead
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* entries in green - and keep the low overhead places
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* normal:
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*/
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if (fabs(percent) >= MIN_RED)
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color = PERF_COLOR_RED;
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else {
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if (fabs(percent) > MIN_GREEN)
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color = PERF_COLOR_GREEN;
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}
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return color;
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}
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int percent_color_fprintf(FILE *fp, const char *fmt, double percent)
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{
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int r;
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const char *color;
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color = get_percent_color(percent);
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r = color_fprintf(fp, color, fmt, percent);
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return r;
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}
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int value_color_snprintf(char *bf, size_t size, const char *fmt, double value)
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{
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const char *color = get_percent_color(value);
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return color_snprintf(bf, size, color, fmt, value);
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}
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int percent_color_snprintf(char *bf, size_t size, const char *fmt, ...)
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{
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va_list args;
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double percent;
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va_start(args, fmt);
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percent = va_arg(args, double);
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va_end(args);
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return value_color_snprintf(bf, size, fmt, percent);
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}
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int percent_color_len_snprintf(char *bf, size_t size, const char *fmt, ...)
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{
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va_list args;
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int len;
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double percent;
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const char *color;
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va_start(args, fmt);
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len = va_arg(args, int);
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percent = va_arg(args, double);
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va_end(args);
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color = get_percent_color(percent);
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return color_snprintf(bf, size, color, fmt, len, percent);
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}
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