mirror of https://github.com/leahneukirchen/mblaze
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
#include <stdint.h>
|
|
#include <stdio.h>
|
|
|
|
#include "u8decode.h"
|
|
|
|
void
|
|
safe_u8putstr(char *s0, size_t l, int oneline, FILE *stream)
|
|
{
|
|
// tty-safe output of s, with relaxed utf-8 semantics:
|
|
// - C0 and C1 are displayed as escape sequences
|
|
// - valid utf-8 is printed as is
|
|
// - rest is assumed to be latin-1, and translated into utf-8
|
|
// - translate CRLF to CR
|
|
|
|
unsigned char *s = (unsigned char *)s0;
|
|
unsigned char *e = s + l;
|
|
uint32_t c;
|
|
|
|
while (s < e) {
|
|
int l = u8decode((char *)s, &c);
|
|
if (l == -1) {
|
|
l = 1;
|
|
if (*s <= 0x9fu) {
|
|
// C1
|
|
fputc(0xe2, stream);
|
|
fputc(0x90, stream);
|
|
fputc(0x80+0x1b, stream);
|
|
|
|
fputc(0xe2, stream);
|
|
fputc(0x90, stream);
|
|
fputc(*s, stream);
|
|
} else {
|
|
/* invalid utf-8, assume it was latin-1 */
|
|
fputc(0xc0 | (*s >> 6), stream);
|
|
fputc(0x80 | (*s & 0x3f), stream);
|
|
}
|
|
} else if (c < 32 &&
|
|
*s != ' ' && *s != '\t' &&
|
|
(oneline || (*s != '\n' && *s != '\r'))) {
|
|
// NUL
|
|
if (l == 0)
|
|
l = 1;
|
|
// C0
|
|
fputc(0xe2, stream);
|
|
fputc(0x90, stream);
|
|
fputc(0x80+*s, stream);
|
|
} else if (c == 127) {
|
|
// DEL
|
|
fputc(0xe2, stream);
|
|
fputc(0x90, stream);
|
|
fputc(0xa1, stream);
|
|
} else if (c == '\r') {
|
|
if (e - s > 1 && s[1] == '\n')
|
|
s++;
|
|
fputc(*s, stream);
|
|
} else {
|
|
fwrite(s, 1, l, stream);
|
|
}
|
|
s += l;
|
|
}
|
|
}
|