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Similar to changes previously made to src/usr.bin/uniq/uniq.c,

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fix truncation of lines at LINE_MAX characters by dynamically
extending line buffers.
This commit is contained in:
Guy Helmer 2008-05-28 14:13:35 +00:00
parent 6182e1eeee
commit 16f53ec4b7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=179374
1 changed files with 90 additions and 22 deletions
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112
usr.bin/comm/comm.c
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@ -64,23 +64,32 @@ __FBSDID("$FreeBSD$");
const wchar_t *tabs[] = { L"", L"\t", L"\t\t" };
FILE *file(const char *);
void show(FILE *, const char *, const wchar_t *, wchar_t *);
wchar_t *getline(wchar_t *, size_t *, FILE *);
void show(FILE *, const char *, const wchar_t *, wchar_t *, size_t *);
int wcsicoll(const wchar_t *, const wchar_t *);
static void usage(void);
int
main(int argc, char *argv[])
{
int comp, file1done = 0, file2done = 0, read1, read2;
int comp, read1, read2;
int ch, flag1, flag2, flag3, iflag;
FILE *fp1, *fp2;
const wchar_t *col1, *col2, *col3;
wchar_t line1[MAXLINELEN], line2[MAXLINELEN];
size_t line1len, line2len;
wchar_t *line1, *line2;
const wchar_t **p;
flag1 = flag2 = flag3 = 1;
iflag = 0;
line1len = MAXLINELEN;
line2len = MAXLINELEN;
line1 = malloc(line1len * sizeof(*line1));
line2 = malloc(line2len * sizeof(*line2));
if (line1 == NULL || line2 == NULL)
err(1, "malloc");
(void) setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "123i")) != -1)
@ -123,25 +132,25 @@ main(int argc, char *argv[])
for (read1 = read2 = 1;;) {
/* read next line, check for EOF */
if (read1) {
file1done = !fgetws(line1, MAXLINELEN, fp1);
if (file1done && ferror(fp1))
line1 = getline(line1, &line1len, fp1);
if (line1 == NULL && ferror(fp1))
err(1, "%s", argv[0]);
}
if (read2) {
file2done = !fgetws(line2, MAXLINELEN, fp2);
if (file2done && ferror(fp2))
line2 = getline(line2, &line2len, fp2);
if (line2 == NULL && ferror(fp2))
err(1, "%s", argv[1]);
}
/* if one file done, display the rest of the other file */
if (file1done) {
if (!file2done && col2)
show(fp2, argv[1], col2, line2);
if (line1 == NULL) {
if (line2 != NULL && col2 != NULL)
show(fp2, argv[1], col2, line2, &line2len);
break;
}
if (file2done) {
if (!file1done && col1)
show(fp1, argv[0], col1, line1);
if (line2 == NULL) {
if (line1 != NULL && col1 != NULL)
show(fp1, argv[0], col1, line1, &line1len);
break;
}
@ -153,7 +162,7 @@ main(int argc, char *argv[])
if (!comp) {
read1 = read2 = 1;
if (col3)
if (col3 != NULL)
(void)printf("%ls%ls", col3, line1);
continue;
}
@ -162,25 +171,49 @@ main(int argc, char *argv[])
if (comp < 0) {
read1 = 1;
read2 = 0;
if (col1)
if (col1 != NULL)
(void)printf("%ls%ls", col1, line1);
} else {
read1 = 0;
read2 = 1;
if (col2)
if (col2 != NULL)
(void)printf("%ls%ls", col2, line2);
}
}
exit(0);
}
wchar_t *
getline(wchar_t *buf, size_t *buflen, FILE *fp)
{
size_t bufpos;
wint_t ch;
bufpos = 0;
do {
if ((ch = getwc(fp)) != WEOF) {
if (bufpos + 2 >= *buflen) {
*buflen = *buflen * 2;
buf = reallocf(buf, *buflen * sizeof(*buf));
if (buf == NULL)
return (NULL);
}
buf[bufpos++] = ch;
}
} while (ch != WEOF && ch != '\n');
if (bufpos + 1 != *buflen)
buf[bufpos] = '\0';
return (bufpos != 0 || ch == '\n' ? buf : NULL);
}
void
show(FILE *fp, const char *fn, const wchar_t *offset, wchar_t *buf)
show(FILE *fp, const char *fn, const wchar_t *offset, wchar_t *buf, size_t *buflen)
{
do {
(void)printf("%ls%ls", offset, buf);
} while (fgetws(buf, MAXLINELEN, fp));
} while ((buf = getline(buf, buflen, fp)) != NULL);
if (ferror(fp))
err(1, "%s", fn);
}
@ -205,16 +238,51 @@ usage(void)
exit(1);
}
static size_t wcsicoll_l1_buflen = 0, wcsicoll_l2_buflen = 0;
static wchar_t *wcsicoll_l1_buf = NULL, *wcsicoll_l2_buf = NULL;
int
wcsicoll(const wchar_t *s1, const wchar_t *s2)
{
wchar_t *p, line1[MAXLINELEN], line2[MAXLINELEN];
wchar_t *p;
size_t l1, l2;
size_t new_l1_buflen, new_l2_buflen;
for (p = line1; *s1; s1++)
l1 = wcslen(s1) + 1;
l2 = wcslen(s2) + 1;
new_l1_buflen = wcsicoll_l1_buflen;
new_l2_buflen = wcsicoll_l2_buflen;
while (new_l1_buflen < l1) {
if (new_l1_buflen == 0)
new_l1_buflen = MAXLINELEN;
else
new_l1_buflen *= 2;
}
while (new_l2_buflen < l2) {
if (new_l2_buflen == 0)
new_l2_buflen = MAXLINELEN;
else
new_l2_buflen *= 2;
}
if (new_l1_buflen > wcsicoll_l1_buflen) {
wcsicoll_l1_buf = reallocf(wcsicoll_l1_buf, new_l1_buflen * sizeof(*wcsicoll_l1_buf));
if (wcsicoll_l1_buf == NULL)
err(1, "reallocf");
wcsicoll_l1_buflen = new_l1_buflen;
}
if (new_l2_buflen > wcsicoll_l2_buflen) {
wcsicoll_l2_buf = reallocf(wcsicoll_l2_buf, new_l2_buflen * sizeof(*wcsicoll_l2_buf));
if (wcsicoll_l2_buf == NULL)
err(1, "reallocf");
wcsicoll_l2_buflen = new_l2_buflen;
}
for (p = wcsicoll_l1_buf; *s1; s1++)
*p++ = towlower(*s1);
*p = '\0';
for (p = line2; *s2; s2++)
for (p = wcsicoll_l2_buf; *s2; s2++)
*p++ = towlower(*s2);
*p = '\0';
return (wcscoll(line1, line2));
return (wcscoll(wcsicoll_l1_buf, wcsicoll_l2_buf));
}