mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include "file.h"
|
|
|
|
#include <string.h>
|
|
|
|
#define F 0
|
|
#define T 1
|
|
|
|
/*
|
|
* List of characters that look "reasonable" in international
|
|
* language texts. That's almost all characters :), except a
|
|
* few in the control range of ASCII (all the known international
|
|
* charactersets share the bottom half with ASCII).
|
|
*/
|
|
static char maybe_internat[256] = {
|
|
F, F, F, F, F, F, F, F, T, T, T, T, T, T, F, F, /* 0x0X */
|
|
F, F, F, F, F, F, F, F, F, F, F, T, F, F, F, F, /* 0x1X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x2X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x3X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x4X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x5X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x6X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, F, /* 0x7X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x8X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0x9X */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0xaX */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0xbX */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0xcX */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0xdX */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, /* 0xeX */
|
|
T, T, T, T, T, T, T, T, T, T, T, T, T, T, T, T /* 0xfX */
|
|
};
|
|
|
|
/* Maximal length of a line we consider "reasonable". */
|
|
#define MAXLINELEN 300
|
|
|
|
int
|
|
internatmagic(buf, nbytes)
|
|
unsigned char *buf;
|
|
int nbytes;
|
|
{
|
|
int i;
|
|
unsigned char *cp;
|
|
|
|
nbytes--;
|
|
|
|
/* First, look whether there are "unreasonable" characters. */
|
|
for (i = 0, cp = buf; i < nbytes; i++, cp++)
|
|
if (!maybe_internat[*cp])
|
|
return 0;
|
|
|
|
/*
|
|
* Now, look whether the file consists of lines of
|
|
* "reasonable" length.
|
|
*/
|
|
|
|
for (i = 0; i < nbytes;) {
|
|
cp = memchr(buf, '\n', nbytes - i);
|
|
if (cp == NULL) {
|
|
/* Don't fail if we hit the end of buffer. */
|
|
if (i + MAXLINELEN >= nbytes)
|
|
break;
|
|
else
|
|
return 0;
|
|
}
|
|
if (cp - buf > MAXLINELEN)
|
|
return 0;
|
|
i += (cp - buf + 1);
|
|
buf = cp + 1;
|
|
}
|
|
ckfputs("International language text", stdout);
|
|
return 1;
|
|
}
|