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Fixed a bug where "sed 's/foo/bar/g'" (i.e. a script w/o a -e)

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would go into an infinite loop.
 -Erik
This commit is contained in:
Erik Andersen
2000-03-06 19:20:35 +00:00
parent 9c5c29d442
commit e916d24805
3 changed files with 246 additions and 244 deletions
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244
editors/sed.c
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@@ -184,129 +184,129 @@ extern int sed_main(int argc, char **argv)
}
while (argc > 1) {
if (**argv == '-') {
argc--;
cp = *argv++;
stopNow = FALSE;
if (**argv != '-')
usage(sed_usage);
argc--;
cp = *argv++;
stopNow = FALSE;
while (*++cp && stopNow == FALSE) {
switch (*cp) {
case 'n':
quietFlag = TRUE;
break;
case 'e':
if (*(cp + 1) == 0 && --argc < 0) {
usage(sed_usage);
}
if (*++cp != 's')
cp = *argv++;
/* Read address if present */
SKIPSPACES(cp);
if (*cp == '$') {
addr_line = LAST_LINE;
cp++;
} else {
if (isdigit(*cp)) { /* LINE ADDRESS */
line_s = cp;
while (isdigit(*cp))
cp++;
if (cp > line_s) {
/* numeric line */
saved = *cp;
*cp = '\0';
addr_line = atoi(line_s);
*cp = saved;
}
} else if (*cp == '/') { /* PATTERN ADDRESS */
pos = addr_pattern = cp + 1;
pos = strchr(pos, '/');
if (!pos)
usage(sed_usage);
*pos = '\0';
cp = pos + 1;
}
}
SKIPSPACES(cp);
if (*cp == '!') {
negated++;
cp++;
}
/* Read command */
SKIPSPACES(cp);
switch (*cp) {
case 's': /* REPLACE */
if (strlen(cp) <= 3 || *(cp + 1) != '/')
break;
sed_f = f_replace;
pos = needle = cp + 2;
for (;;) {
pos = strchr(pos, '/');
if (pos == NULL) {
usage(sed_usage);
}
if (*(pos - 1) == '\\') {
pos++;
continue;
}
break;
}
*pos = 0;
newNeedle = ++pos;
for (;;) {
pos = strchr(pos, '/');
if (pos == NULL) {
usage(sed_usage);
}
if (*(pos - 1) == '\\') {
pos++;
continue;
}
break;
}
*pos = 0;
if (pos + 2 != 0) {
while (*++pos) {
switch (*pos) {
case 'i':
ignoreCase = TRUE;
break;
case 'p':
printFlag = TRUE;
break;
case 'g':
break;
default:
usage(sed_usage);
}
}
}
cp = pos;
/* fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle); */
break;
case 'a': /* APPEND */
if (strlen(cp) < 2)
break;
sed_f = f_append;
appendline = ++cp;
/* fprintf(stderr, "append '%s'\n", appendline); */
break;
}
stopNow = TRUE;
break;
default:
usage(sed_usage);
}
}
}
while (*++cp && stopNow == FALSE) {
switch (*cp) {
case 'n':
quietFlag = TRUE;
break;
case 'e':
if (*(cp + 1) == 0 && --argc < 0) {
usage(sed_usage);
}
if (*++cp != 's')
cp = *argv++;
/* Read address if present */
SKIPSPACES(cp);
if (*cp == '$') {
addr_line = LAST_LINE;
cp++;
} else {
if (isdigit(*cp)) { /* LINE ADDRESS */
line_s = cp;
while (isdigit(*cp))
cp++;
if (cp > line_s) {
/* numeric line */
saved = *cp;
*cp = '\0';
addr_line = atoi(line_s);
*cp = saved;
}
} else if (*cp == '/') { /* PATTERN ADDRESS */
pos = addr_pattern = cp + 1;
pos = strchr(pos, '/');
if (!pos)
usage(sed_usage);
*pos = '\0';
cp = pos + 1;
}
}
SKIPSPACES(cp);
if (*cp == '!') {
negated++;
cp++;
}
/* Read command */
SKIPSPACES(cp);
switch (*cp) {
case 's': /* REPLACE */
if (strlen(cp) <= 3 || *(cp + 1) != '/')
break;
sed_f = f_replace;
pos = needle = cp + 2;
for (;;) {
pos = strchr(pos, '/');
if (pos == NULL) {
usage(sed_usage);
}
if (*(pos - 1) == '\\') {
pos++;
continue;
}
break;
}
*pos = 0;
newNeedle = ++pos;
for (;;) {
pos = strchr(pos, '/');
if (pos == NULL) {
usage(sed_usage);
}
if (*(pos - 1) == '\\') {
pos++;
continue;
}
break;
}
*pos = 0;
if (pos + 2 != 0) {
while (*++pos) {
switch (*pos) {
case 'i':
ignoreCase = TRUE;
break;
case 'p':
printFlag = TRUE;
break;
case 'g':
break;
default:
usage(sed_usage);
}
}
}
cp = pos;
/* fprintf(stderr, "replace '%s' with '%s'\n", needle, newNeedle); */
break;
case 'a': /* APPEND */
if (strlen(cp) < 2)
break;
sed_f = f_append;
appendline = ++cp;
/* fprintf(stderr, "append '%s'\n", appendline); */
break;
}
stopNow = TRUE;
break;
default:
usage(sed_usage);
}
}
}
if (argc == 0) {