#pragma prototyped
#include <optlib.h>
#include <ctype.h>
int
optesc(Sfio_t* sp, register const char* s, int esc)
{
register const char* m;
register int c;
if (*s == '[' && *(s + 1) == '+' && *(s + 2) == '?')
{
c = strlen(s);
if (s[c - 1] == ']')
{
sfprintf(sp, "%-.*s", c - 4, s + 3);
return 0;
}
}
if (esc != '?' && esc != ':')
esc = 0;
while (c = *s++)
{
if (isalnum(c))
{
for (m = s - 1; isalnum(*s); s++);
if (isalpha(c) && *s == '(' && isdigit(*(s + 1)) && *(s + 2) == ')')
{
sfputc(sp, '\b');
sfwrite(sp, m, s - m);
sfputc(sp, '\b');
sfwrite(sp, s, 3);
s += 3;
}
else
sfwrite(sp, m, s - m);
}
else if (c == '-' && *s == '-' || c == '<')
{
m = s - 1;
if (c == '-')
s++;
else if (*s == '/')
s++;
while (isalnum(*s))
s++;
if (c == '<' && *s == '>' || isspace(*s) || *s == 0 || *s == '=' || *s == ':' || *s == ';' || *s == '.' || *s == ',')
{
sfputc(sp, '\b');
sfwrite(sp, m, s - m);
sfputc(sp, '\b');
}
else
sfwrite(sp, m, s - m);
}
else
{
if (c == ']' || c == esc)
sfputc(sp, c);
sfputc(sp, c);
}
}
return 0;
}