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Add support for multibyte characters and for characters that take up

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more than one column position.
This commit is contained in:
Tim J. Robbins 2004-06-24 13:48:28 +00:00
parent f0fb4dc00a
commit a2641fe8d7
1 changed files with 27 additions and 19 deletions
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46
usr.bin/unexpand/unexpand.c
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@ -56,6 +56,8 @@ static const char sccsid[] = "@(#)unexpand.c 8.1 (Berkeley) 6/6/93";
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
int all;
int nstops;
@ -63,7 +65,7 @@ int tabstops[100];
static void getstops(const char *);
static void usage(void);
static void tabify(void);
static int tabify(const char *);
int
main(int argc, char *argv[])
@ -94,14 +96,14 @@ main(int argc, char *argv[])
failed = 0;
if (argc == 0)
tabify();
failed |= tabify("stdin");
else {
while ((filename = *argv++) != NULL) {
if (freopen(filename, "r", stdin) == NULL) {
warn("%s", filename);
failed++;
failed = 1;
} else
tabify();
failed |= tabify(filename);
}
}
exit(failed != 0);
@ -114,15 +116,16 @@ usage(void)
exit(1);
}
static void
tabify(void)
static int
tabify(const char *curfile)
{
int ch, dcol, doneline, limit, n, ocol;
int dcol, doneline, limit, n, ocol, width;
wint_t ch;
limit = nstops == 1 ? INT_MAX : tabstops[nstops - 1] - 1;
doneline = ocol = dcol = 0;
while ((ch = getchar()) != EOF) {
while ((ch = getwchar()) != WEOF) {
if (ch == ' ' && !doneline) {
if (++dcol >= limit)
doneline = 1;
@ -150,7 +153,7 @@ tabify(void)
<= (dcol / tabstops[0])) {
if (dcol - ocol < 2)
break;
putchar('\t');
putwchar('\t');
ocol = (1 + ocol / tabstops[0]) *
tabstops[0];
}
@ -158,29 +161,29 @@ tabify(void)
for (n = 0; tabstops[n] - 1 < ocol && n < nstops; n++)
;
while (ocol < dcol && n < nstops && ocol < limit) {
putchar('\t');
putwchar('\t');
ocol = tabstops[n++];
}
}
/* Then spaces. */
while (ocol < dcol && ocol < limit) {
putchar(' ');
putwchar(' ');
ocol++;
}
if (ch == '\b') {
putchar('\b');
putwchar('\b');
if (ocol > 0)
ocol--, dcol--;
} else if (ch == '\n') {
putchar('\n');
putwchar('\n');
doneline = ocol = dcol = 0;
continue;
} else if (ch != ' ' || dcol > limit) {
putchar(ch);
if (isprint(ch))
ocol++, dcol++;
putwchar(ch);
if ((width = wcwidth(ch)) > 0)
ocol += width, dcol += width;
}
/*
@ -188,13 +191,18 @@ tabify(void)
* last tab stop. Emit remainder of this line unchanged.
*/
if (!all || dcol >= limit) {
while ((ch = getchar()) != '\n' && ch != EOF)
putchar(ch);
while ((ch = getwchar()) != '\n' && ch != WEOF)
putwchar(ch);
if (ch == '\n')
putchar('\n');
putwchar('\n');
doneline = ocol = dcol = 0;
}
}
if (ferror(stdin)) {
warn("%s", curfile);
return (1);
}
return (0);
}
static void