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Add colors to logging

Browse source 
This includes the bold as well.

INFO is just default, WARN is yellow, ERROR is red.

We try to automatically detect if the output is a TTY (and thus supports
colors), and don't emit colors if so. Windows 10 supports ANSI color
codes starting with a specific build, but we don't care to emit whatever
garbage Microsoft invented for builds older than that.
This commit is contained in:
Misa 2021-02-23 15:22:28 -08:00 committed by Misa Elizabeth Kai
parent 96539f891c
commit ac85f57441
3 changed files with 62 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

55
desktop_version/src/Vlogging.c
View file

@ -1,12 +1,61 @@
#include <SDL_stdinc.h>
#include <stdarg.h>
#include <stdio.h>
#if defined(__unix__) || defined(__APPLE__)
#include <unistd.h>
#define STDOUT_IS_TTY isatty(STDOUT_FILENO)
#define STDERR_IS_TTY isatty(STDERR_FILENO)
#elif defined(_WIN32)
#include <io.h>
#include <windows.h>
#define STDOUT_IS_TTY _isatty(_fileno(stdout))
#define STDERR_IS_TTY _isatty(_fileno(stderr))
#else
#define STDOUT_IS_TTY 0
#define STDERR_IS_TTY 0
#endif
#define COLOR(EXPR) color_enabled ? EXPR : ""
#define Color_RESET COLOR("\x1b[0m")
#define Color_BOLD COLOR("\x1b[1m")
#define Color_BOLD_YELLOW COLOR("\x1b[1;33m")
#define Color_BOLD_RED COLOR("\x1b[1;31m")
static int color_enabled = 0;
void vlog_init(void)
{
#ifdef _WIN32
OSVERSIONINFO osvi;
SDL_zero(osvi);
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionExW(&osvi);
#endif
if (STDOUT_IS_TTY
&& STDERR_IS_TTY
#ifdef _WIN32
/* Windows supports ANSI escape sequences starting with Windows 10
* build 10586. We don't care to emit them on anything lower. */
&& osvi.dwMajorVersion >= 10
&& osvi.dwBuildNumber >= 10586
#endif
) {
color_enabled = 1;
}
}
int vlog_info(const char* text, ...)
{
va_list list;
int retval;
printf(Color_BOLD);
printf("[INFO]");
printf(Color_RESET);
printf(" ");
va_start(list, text);
retval = vprintf(text, list);
@ -22,7 +71,10 @@ int vlog_warn(const char* text, ...)
va_list list;
int retval;
fprintf(stderr, Color_BOLD_YELLOW);
fprintf(stderr, "[WARN]");
fprintf(stderr, Color_RESET);
fprintf(stderr, " ");
va_start(list, text);
retval = vfprintf(stderr, text, list);
@ -38,7 +90,10 @@ int vlog_error(const char* text, ...)
va_list list;
int retval;
fprintf(stderr, Color_BOLD_RED);
fprintf(stderr, "[ERROR]");
fprintf(stderr, Color_RESET);
fprintf(stderr, " ");
va_start(list, text);
retval = vfprintf(stderr, text, list);

2
desktop_version/src/Vlogging.h
View file

@ -6,6 +6,8 @@ extern "C"
{
#endif
void vlog_init(void);
int vlog_info(const char* text, ...);
int vlog_warn(const char* text, ...);

2
desktop_version/src/main.cpp
View file

@ -361,6 +361,8 @@ int main(int argc, char *argv[])
char* baseDir = NULL;
char* assetsPath = NULL;
vlog_init();
for (int i = 1; i < argc; ++i)
{
#define ARG(name) (SDL_strcmp(argv[i], name) == 0)