94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
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#include <cfg/opt.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/col.h>
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#include <sys/log.h>
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#ifdef __unix__
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#include <unistd.h>
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#elif defined(_WIN32) || defined(WIN32)
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#include <Windows.h>
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#endif
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char* RED;
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char* YELLOW;
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char* MAGENTA;
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char* CYAN;
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char* GREEN;
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char* RESET;
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char* BOLD;
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char* FAINT;
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void col_init(void) {
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if (stdout_supports_ansi_esc()) {
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enable_ansi_colors();
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} else {
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disable_ansi_colors();
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}
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}
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void disable_ansi_colors() {
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DEBUG("disabling ANSI escape codes");
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RED = "";
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YELLOW = "";
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MAGENTA = "";
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CYAN = "";
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GREEN = "";
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RESET = "";
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BOLD = "";
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FAINT = "";
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}
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void enable_ansi_colors() {
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DEBUG("enabling ANSI escape codes");
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RED = "\x1b[31m";
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YELLOW = "\x1b[33m";
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MAGENTA = "\x1b[35m";
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CYAN = "\x1b[36m";
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GREEN = "\x1b[32m";
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RESET = "\x1b[0m";
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BOLD = "\x1b[1m";
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FAINT = "\x1b[2m";
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}
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int stdout_supports_ansi_esc() {
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if (is_option_set("color-always")) {
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return ANSI_ENABLED;
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}
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#ifdef __unix__
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// check if TTY
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if (isatty(STDOUT_FILENO)) {
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const char* colors = getenv("COLORTERM");
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// check if colors are set and allowed
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if (colors != NULL
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&& (strcmp(colors, "truecolor") == 0
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|| strcmp(colors, "24bit") == 0)) {
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return ANSI_ENABLED;
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}
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}
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#elif defined(_WIN32) || defined(WIN32)
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// see:
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// https://stackoverflow.com/questions/63913005/how-to-test-if-console-supports-ansi-color-codes
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DWORD mode;
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HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
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if (!GetConsoleMode(hConsole, &mode)) {
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return ASNI_DISABLED;
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}
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if ((mode & ENABLE_VIRTUAL_TERMINAL_INPUT)
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| (mode & ENABLE_VIRTUAL_TERMINAL_PROCESSING)) {
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return ANSI_ENABLED;
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}
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#else
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#warning "unsupported platform, ASNI escape codes disabled by default"
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#endif
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return ASNI_DISABLED;
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}
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