/* readquotes: process a quoted sequence in s */
static char *readquotes(char *s)
{
int quot;
quot = *s;
shift_l(s);
for (++s; *s && *s != quot; ++s) {
if (*s == '\\' && s[1] == quot)
shift_l(s);
}
if (!*s) {
snprintf(err, ERR_LEN, "error: unterminated quote");
return NULL;
}
shift_l(s);
return s - 1;
}
stBigNum multiply(stBigNum tNumX, stBigNum tNumY){
stBigNum tResult;
clean_number(&tResult);
while(!equal_zero(&tNumX)){
if(odd(tNumX.aiBlock[0])){
tResult = add(tResult, tNumY);
}
shift_r(&tNumX);
shift_l(&tNumY);
}
return (tResult);
}
/* escseq: process an escape sequence in s */
static int escseq(char *s)
{
static const char *esc = " \\'\"";
if (!s[1]) {
snprintf(err, ERR_LEN, "error: unexpected end of line");
return 0;
}
if (!strchr(esc, s[1])) {
snprintf(err, ERR_LEN, "error: unrecognized "
"escape sequence \\%c", s[1]);
return 0;
}
shift_l(s);
return 1;
}
/* parsecmd: break up the sed command into its parts */
static int parsecmd(struct sedinfo *s, char *cmd)
{
char *t;
int delim;
s->global = s->ignore = 0;
if (cmd[0] != 's') {
s->error = INVCMD;
s->errtok = cmd[0];
return 0;
}
if (!(delim = cmd[1]) || !*(s->regex = cmd + 2)) {
s->error = UNTERM;
return 0;
}
t = s->regex;
for (t = s->regex; *t; ++t) {
if ((*t == '(' || *t == '[')
&& (t == s->regex || *(t - 1) != '\\')) {
if (!(t = readbrackets(t))) {
s->error = UNTERM;
return 0;
}
} else if (*t == delim) {
if (*(t - 1) != '\\')
break;
shift_l(t - 1);
--t;
}
}
if (!t) {
s->error = UNTERM;
return 0;
}
*t++ = '\0';
if (!*(s->replace = t)) {
s->error = UNTERM;
return 0;
}
while ((t = strchr(t, delim)) && *(t - 1) == '\\')
shift_l(t - 1);
if (!t) {
s->error = UNTERM;
return 0;
}
*t++ = '\0';
for (; *t; ++t) {
switch (*t) {
case 'g':
s->global = 1;
break;
case 'i':
s->ignore = 1;
break;
default:
s->error = BADOPT;
s->errtok = *t;
return 0;
}
}
return 1;
}
