77 lines
1.3 KiB
C
77 lines
1.3 KiB
C
/*
|
|
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*/
|
|
/* $Header$ */
|
|
/* PREPROCESSOR: INPUT SKIP FUNCTIONS */
|
|
|
|
#include "nopp.h"
|
|
#include "arith.h"
|
|
#include "LLlex.h"
|
|
#include "class.h"
|
|
#include "input.h"
|
|
#include "interface.h"
|
|
|
|
#ifndef NOPP
|
|
PRIVATE int
|
|
skipspaces(ch)
|
|
register int ch;
|
|
{
|
|
/* skipspaces() skips any white space and returns the first
|
|
non-space character.
|
|
*/
|
|
for (;;) {
|
|
while (class(ch) == STSKIP)
|
|
LoadChar(ch);
|
|
|
|
/* How about "\\\n"????????? */
|
|
|
|
if (ch == '/') {
|
|
LoadChar(ch);
|
|
if (ch == '*') {
|
|
skipcomment();
|
|
LoadChar(ch);
|
|
}
|
|
else {
|
|
PushBack();
|
|
return '/';
|
|
}
|
|
}
|
|
else
|
|
return ch;
|
|
}
|
|
}
|
|
#endif NOPP
|
|
|
|
PRIVATE
|
|
skipline()
|
|
{
|
|
/* skipline() skips all characters until a newline character
|
|
is seen, not escaped by a '\\'.
|
|
Any comment is skipped.
|
|
*/
|
|
register int c;
|
|
|
|
LoadChar(c);
|
|
while (class(c) != STNL && c != EOI) {
|
|
if (c == '\\') {
|
|
LoadChar(c);
|
|
if (class(c) == STNL)
|
|
++LineNumber;
|
|
}
|
|
if (c == '/') {
|
|
LoadChar(c);
|
|
if (c == '*')
|
|
skipcomment();
|
|
else
|
|
continue;
|
|
}
|
|
LoadChar(c);
|
|
}
|
|
++LineNumber;
|
|
|
|
if (c == EOI) { /* garbage input... */
|
|
lexerror("unexpected EOF while skipping text");
|
|
PushBack();
|
|
}
|
|
}
|