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/*
* Copyright (C) 2012 Ondrej Oprala <ooprala@redhat.com>
*
* This file may be distributed under the terms of the
* GNU Lesser General Public License.
*/
#include <c.h>
#include <assert.h>
#include "colors.h"
static int ul_color_term_ok;
int colors_init(int mode)
{
switch (mode) {
case UL_COLORMODE_AUTO:
ul_color_term_ok = isatty(STDOUT_FILENO);
break;
case UL_COLORMODE_ALWAYS:
ul_color_term_ok = 1;
break;
case UL_COLORMODE_NEVER:
default:
ul_color_term_ok = 0;
}
return ul_color_term_ok;
}
void color_enable(const char *color_scheme)
{
if (ul_color_term_ok && color_scheme)
fputs(color_scheme, stdout);
}
void color_disable(void)
{
if (ul_color_term_ok)
fputs(UL_COLOR_RESET, stdout);
}
int colormode_from_string(const char *str)
{
size_t i;
static const char *modes[] = {
[UL_COLORMODE_AUTO] = "auto",
[UL_COLORMODE_NEVER] = "never",
[UL_COLORMODE_ALWAYS] = "always"
};
if (!str || !*str)
return -EINVAL;
assert(ARRAY_SIZE(modes) == __UL_NCOLORMODES);
for (i = 0; i < ARRAY_SIZE(modes); i++) {
if (strcasecmp(str, modes[i]) == 0)
return i;
}
return -EINVAL;
}
int colormode_or_err(const char *str, const char *errmsg)
{
const char *p = str && *str == '=' ? str + 1 : str;
int colormode;
colormode = colormode_from_string(p);
if (colormode < 0)
errx(EXIT_FAILURE, "%s: '%s'", errmsg, p);
return colormode;
}
#ifdef TEST_PROGRAM
# include <getopt.h>
int main(int argc, char *argv[])
{
static const struct option longopts[] = {
{ "colors", optional_argument, 0, 'c' },
{ NULL, 0, 0, 0 }
};
int c, mode = UL_COLORMODE_NEVER; /* default */
while ((c = getopt_long(argc, argv, "c::", longopts, NULL)) != -1) {
switch (c) {
case 'c':
mode = UL_COLORMODE_AUTO;
if (optarg)
mode = colormode_or_err(optarg, "unsupported color mode");
break;
}
}
colors_init(mode);
color_enable(UL_COLOR_RED);
printf("Hello World!");
color_disable();
return EXIT_SUCCESS;
}
#endif
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