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#include <errno.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <mbstring.h>
#include "cerr.h"
#include "macros.h"
#include "mbstring.h"
#define TAB_AS_SPC " "
#define EOLS8 u8"\n\v\f\r\x85\u2028\u2029"
#define EOLS32 U"\n\v\f\r\x85\u2028\u2029"
#define SGR_BOLD "\33[1m"
#define SGR_DONE "\33[0m"
#define SGR_ERR "\33[1;31m"
int sizelen(size_t);
static bool color;
static const char *progname;
static const char *_bold, *_done, *_err;
void
cerrinit(const char *s)
{
const char *p = strrchr(s, '/');
progname = p ? p + 1 : s;
if (isatty(STDOUT_FILENO)) {
const char *ev = getenv("NO_COLOR");
color = !ev || !*ev;
}
if (color) {
_bold = SGR_BOLD;
_done = SGR_DONE;
_err = SGR_ERR;
} else
_bold = _done = _err = "";
}
void
die(const char *fmt, ...)
{
va_list ap;
int e = errno;
va_start(ap, fmt);
fprintf(stderr, "%s%s:%s ", _bold, progname, _done);
vfprintf(stderr, fmt, ap);
fprintf(stderr, ": %s\n", strerror(e));
va_end(ap);
exit(EXIT_FAILURE);
}
void
diex(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s%s:%s ", _bold, progname, _done);
vfprintf(stderr, fmt, ap);
fputc('\n', stderr);
va_end(ap);
exit(EXIT_FAILURE);
}
void
die_with_off(const char *file, size_t off, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s%s: %s:%zu:%s %serror:%s ", _bold, progname, file, off,
_done, _err, _done);
vfprintf(stderr, fmt, ap);
fputc('\n', stderr);
va_end(ap);
exit(EXIT_FAILURE);
}
void
die_at_pos_with_code(const char *file, struct u8view sv, struct u8view hl,
size_t off, const char *fmt, ...)
{
int w;
rune _;
size_t lb;
va_list ap;
const char8_t *prv, *end;
va_start(ap, fmt);
fprintf(stderr, "%s%s: %s:%zu:%s %serror:%s ", _bold, progname, file, off,
_done, _err, _done);
vfprintf(stderr, fmt, ap);
fputc('\n', stderr);
va_end(ap);
for (lb = 0, prv = end = sv.p; end <= sv.p + off; lb++) {
prv = end;
end += u8cbspn(end, sv.p + sv.len - end, EOLS32, lengthof(EOLS32) - 1);
end += u8tor_uc(&_, end);
}
u8prev(&_, &end, prv);
w = sizelen(lb);
w = MAX(w, 4);
fprintf(stderr, " %*zu │ ", w, lb);
/* The following is really ugly, but it works! */
if (hl.p) {
ptrdiff_t w2 = hl.p - prv;
struct u8view pfx = {prv, w2};
for (ptrdiff_t i = 0; i < w2; i++) {
if (prv[i] == '\t')
fputs(TAB_AS_SPC, stderr);
else
fputc(prv[i], stderr);
}
fprintf(stderr, "%s%.*s%s%.*s\n", _err, U8_PRI_ARGS(hl), _done,
(int)(end - (prv + w2 + hl.len)), prv + w2 + hl.len);
fprintf(stderr, " %*c │ ", w, ' ');
while (u8next(&_, &pfx.p, &pfx.len)) {
if (_ == '\t')
fputs(TAB_AS_SPC, stderr);
else
fputc(' ', stderr);
}
fprintf(stderr, "%s^", _err);
for (u8next(&_, &hl.p, &hl.len); u8next(&_, &hl.p, &hl.len);
fputc('~', stderr))
;
fprintf(stderr, "%s\n", _done);
} else {
fprintf(stderr, "%.*s\n", (int)(end - prv), prv);
fprintf(stderr, " %*c │\n", w, ' ');
}
exit(EXIT_FAILURE);
}
int
sizelen(size_t x)
{
int n;
for (n = 0; x; x /= 10, n++)
;
return n;
}
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