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Overhaul lputs() to deal with multibyte characters, characters that take

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up more than one column position, and null bytes.
This commit is contained in:
Tim J. Robbins 2004-07-13 04:35:43 +00:00
parent ce8da3091f
commit b4828720f7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132083
1 changed files with 54 additions and 25 deletions
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79
usr.bin/sed/process.c
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@ -57,6 +57,8 @@ static const char sccsid[] = "@(#)process.c 8.6 (Berkeley) 4/20/94";
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
#include "defs.h"
#include "extern.h"
@ -70,7 +72,7 @@ static SPACE HS, PS, SS;
static __inline int applies(struct s_command *);
static void flush_appends(void);
static void lputs(char *);
static void lputs(char *, size_t);
static __inline int regexec_e(regex_t *, const char *, int, int, size_t);
static void regsub(SPACE *, char *, char *);
static int substitute(struct s_command *);
@ -165,7 +167,7 @@ process(void)
(void)fprintf(outfile, "%s", cp->t);
break;
case 'l':
lputs(ps);
lputs(ps, psl);
break;
case 'n':
if (!nflag && !pd)
@ -462,13 +464,16 @@ flush_appends(void)
}
static void
lputs(char *s)
lputs(char *s, size_t len)
{
int count;
const char *escapes;
static const char escapes[] = "\\\a\b\f\r\t\v";
int c, col, width;
char *p;
struct winsize win;
static int termwidth = -1;
size_t clen, i;
wchar_t wc;
mbstate_t mbs;
if (outfile != stdout)
termwidth = 60;
@ -482,30 +487,54 @@ lputs(char *s)
termwidth = 60;
}
for (count = 0; *s; ++s) {
if (count + 5 >= termwidth) {
(void)fprintf(outfile, "\\\n");
count = 0;
memset(&mbs, 0, sizeof(mbs));
col = 0;
while (len != 0) {
clen = mbrtowc(&wc, s, len, &mbs);
if (clen == 0)
clen = 1;
if (clen == (size_t)-1 || clen == (size_t)-2) {
wc = (unsigned char)*s;
clen = 1;
memset(&mbs, 0, sizeof(mbs));
}
if (isprint((unsigned char)*s) && *s != '\\') {
(void)fputc(*s, outfile);
count++;
} else if (*s == '\n') {
(void)fputc('$', outfile);
(void)fputc('\n', outfile);
count = 0;
} else {
escapes = "\\\a\b\f\r\t\v";
(void)fputc('\\', outfile);
if ((p = strchr(escapes, *s))) {
(void)fputc("\\abfrtv"[p - escapes], outfile);
count += 2;
} else {
(void)fprintf(outfile, "%03o", *(u_char *)s);
count += 4;
if (wc == '\n') {
if (col + 1 >= termwidth)
fprintf(outfile, "\\\n");
fputc('$', outfile);
fputc('\n', outfile);
col = 0;
} else if (iswprint(wc)) {
width = wcwidth(wc);
if (col + width >= termwidth) {
fprintf(outfile, "\\\n");
col = 0;
}
fwrite(s, 1, clen, outfile);
col += width;
} else if (wc != L'\0' && (c = wctob(wc)) != EOF &&
(p = strchr(escapes, c)) != NULL) {
if (col + 2 >= termwidth) {
fprintf(outfile, "\\\n");
col = 0;
}
fprintf(outfile, "\\%c", "\\abfrtv"[p - escapes]);
col += 2;
} else {
if (col + 4 * clen >= termwidth) {
fprintf(outfile, "\\\n");
col = 0;
}
for (i = 0; i < clen; i++)
fprintf(outfile, "\\%03o",
(int)(unsigned char)s[i]);
col += 4 * clen;
}
s += clen;
len -= clen;
}
if (col + 1 >= termwidth)
fprintf(outfile, "\\\n");
(void)fputc('$', outfile);
(void)fputc('\n', outfile);
if (ferror(outfile))