126 lines
1.9 KiB
C
126 lines
1.9 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Id$ */
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/* PREPROCESSOR: INPUT SKIP FUNCTIONS */
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#include "arith.h"
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#include "LLlex.h"
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#include "class.h"
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#include "input.h"
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extern int InputLevel;
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int skipspaces(ch, skipnl) register int ch;
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{
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/* skipspaces() skips any white space and returns the first
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non-space character.
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*/
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register int nlseen = 0;
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for (;;)
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{
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while (class(ch) == STSKIP)
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ch = GetChar();
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if (skipnl && class(ch) == STNL)
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{
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ch = GetChar();
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LineNumber++;
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nlseen++;
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continue;
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}
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if (ch == TOKSEP && InputLevel)
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{
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ch = GetChar();
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continue;
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}
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/* \\\n are handled by trigraph */
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if (ch == '/')
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{
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ch = GetChar();
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if (ch == '*' && !InputLevel)
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{
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skipcomment();
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ch = GetChar();
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}
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else if (ch == '/' && !InputLevel)
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{
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skiplinecomment();
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ch = GetChar();
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}
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else
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{
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UnGetChar();
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return '/';
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}
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}
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else if (nlseen && ch == '#')
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{
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domacro();
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ch = GetChar();
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}
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else
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return ch;
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}
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}
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SkipToNewLine()
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{
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register int ch;
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register int garbage = 0;
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register int delim = 0;
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while ((ch = GetChar()) != '\n')
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{
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if (delim)
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{
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if (ch == '\\')
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{
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if (GetChar() == '\n')
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break;
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}
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else if (ch == delim)
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{
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delim = 0;
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}
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continue;
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}
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else if (ch == '\'' || ch == '\"')
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{
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delim = ch;
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garbage = 1;
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}
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else if (ch == '/')
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{
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if (!InputLevel)
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{
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int nch = GetChar();
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if (nch == '*')
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{
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skipcomment();
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continue;
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}
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else if (nch == '/')
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{
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skiplinecomment();
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continue;
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}
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else
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UnGetChar();
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}
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}
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else if (ch == TOKSEP && InputLevel)
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{
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continue;
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}
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if (!is_wsp(ch))
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garbage = 1;
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}
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if (delim)
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strict("unclosed opening %c", delim);
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++LineNumber;
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return garbage;
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}
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