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Diffstat (limited to 'src/preproc/html2/pushbackbuffer.cc')
| -rwxr-xr-x | src/preproc/html2/pushbackbuffer.cc | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/src/preproc/html2/pushbackbuffer.cc b/src/preproc/html2/pushbackbuffer.cc deleted file mode 100755 index edd31c979..000000000 --- a/src/preproc/html2/pushbackbuffer.cc +++ /dev/null @@ -1,308 +0,0 @@ -// -*- C++ -*- -/* Copyright (C) 2000 Free Software Foundation, Inc. - Written by Gaius Mulley (gaius@glam.ac.uk). - -This file is part of groff. - -groff is free software; you can redistribute it and/or modify it under -the terms of the GNU General Public License as published by the Free -Software Foundation; either version 2, or (at your option) any later -version. - -groff is distributed in the hope that it will be useful, but WITHOUT ANY -WARRANTY; without even the implied warranty of MERCHANTABILITY or -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -for more details. - -You should have received a copy of the GNU General Public License along -with groff; see the file COPYING. If not, write to the Free Software -Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include <stdio.h> -#include <signal.h> -#include <ctype.h> -#include <string.h> -#include <assert.h> -#include <stdlib.h> -#include <errno.h> -#include "lib.h" -#include "errarg.h" -#include "error.h" -#include "stringclass.h" -#include "posix.h" - -#include <errno.h> -#include <sys/types.h> -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#include "pushbackbuffer.h" -#include "pre-html.h" - -#if !defined(TRUE) -# define TRUE (1==1) -#endif - -#if !defined(FALSE) -# define FALSE (1==0) -#endif - -# define ERROR(X) (fprintf(stderr, "%s:%d error %s\n", __FILE__, __LINE__, X) && \ - (fflush(stderr)) && localexit(1)) - - -#define MAXPUSHBACKSTACK 4096 /* maximum number of character that can be pushed back */ - - -/* - * constructor for pushBackBuffer - */ - -pushBackBuffer::pushBackBuffer (char *filename) -{ - charStack = (char *)malloc(MAXPUSHBACKSTACK); - if (charStack == 0) { - sys_fatal("malloc"); - } - stackPtr = 0; /* index to push back stack */ - debug = 0; - verbose = 0; - eofFound = FALSE; - lineNo = 1; - if (strcmp(filename, "") != 0) { - stdIn = dup(0); - close(0); - if (open(filename, O_RDONLY) != 0) { - sys_fatal("when tring to read graph file"); - } else { - fileName = filename; - } - } -} - -pushBackBuffer::~pushBackBuffer () -{ - int old; - - if (charStack != 0) { - free(charStack); - } - close(0); - /* restore stdin in file descriptor 0 */ - old = dup(stdIn); - close(stdIn); -} - -/* - * localexit - wraps exit with a return code to aid the ERROR macro. - */ - -int localexit (int i) -{ - exit(i); - return( 1 ); -} - -/* - * getPB - returns a character, possibly a pushed back character. - */ - -char pushBackBuffer::getPB (void) -{ - if (stackPtr>0) { - stackPtr--; - return( charStack[stackPtr] ); - } else { - char ch; - - if (read(0, &ch, 1) == 1) { - if (verbose) { - printf("%c", ch); - } - if (ch == '\n') { - lineNo++; - } - return( ch ); - } else { - eofFound = TRUE; - return( eof ); - } - } -} - -/* - * putPB - pushes a character onto the push back stack. - * The same character is returned. - */ - -char pushBackBuffer::putPB (char ch) -{ - if (stackPtr<MAXPUSHBACKSTACK) { - charStack[stackPtr] = ch ; - stackPtr++; - } else { - ERROR("max push back stack exceeded, increase MAXPUSHBACKSTACK constant"); - } - return( ch ); -} - -/* - * isWhite - returns TRUE if a white character is found. This character is NOT consumed. - */ - -static int isWhite (char ch) -{ - return( (ch==' ') || (ch == '\t') || (ch == '\n') ); -} - -/* - * skipToNewline - skips characters until a newline is seen. - */ - -void pushBackBuffer::skipToNewline (void) -{ - char ch; - - while ((putPB(getPB()) != '\n') && (! eofFound)) { - ch = getPB(); - } -} - -/* - * skipUntilToken - skips until a token is seen - */ - -void pushBackBuffer::skipUntilToken (void) -{ - char ch; - - while ((isWhite(putPB(getPB())) || (putPB(getPB()) == '#')) && (! eofFound)) { - ch = getPB(); - if (ch == '#') { - skipToNewline(); - } - } -} - -/* - * isString - returns TRUE if the string, s, matches the pushed back string. - * if TRUE is returned then this string is consumed, otherwise it is - * left alone. - */ - -int pushBackBuffer::isString (char *s) -{ - int length=strlen(s); - int i=0; - int j; - - while ((i<length) && (putPB(getPB())==s[i])) { - if (getPB() != s[i]) { - ERROR("assert failed"); - } - i++; - } - if (i==length) { - return( TRUE ); - } else { - i--; - while (i>=0) { - if (putPB(s[i]) != s[i]) { - ERROR("assert failed"); - } - i--; - } - } - return( FALSE ); -} - -/* - * isDigit - returns TRUE if the character, ch, is a digit. - */ - -static int isDigit (char ch) -{ - return( ((ch>='0') && (ch<='9')) ); -} - -/* - * isHexDigit - returns TRUE if the character, ch, is a hex digit. - */ - -static int isHexDigit (char ch) -{ - return( (isDigit(ch)) || ((ch>='a') && (ch<='f')) ); -} - -/* - * readInt - returns an integer from the input stream. - */ - -int pushBackBuffer::readInt (void) -{ - int c =0; - int i =0; - int s =1; - char ch=getPB(); - - while (isWhite(ch)) { - ch=getPB(); - } - // now read integer - - if (ch == '-') { - s = -1; - ch = getPB(); - } - while (isDigit(ch)) { - i *= 10; - if ((ch>='0') && (ch<='9')) { - i += (int)(ch-'0'); - } - ch = getPB(); - c++; - } - if (ch != putPB(ch)) { - ERROR("assert failed"); - } - return( i*s ); -} - -/* - * convertToFloat - converts integers, a and b into a.b - */ - -static float convertToFloat (int a, int b) -{ - int c=10; - float f; - - while (b>c) { - c *= 10; - } - f = ((float)a) + (((float)b)/((float)c)); - return( f ); -} - -/* - * readNumber - returns a float representing the word just read. - */ - -float pushBackBuffer::readNumber (void) -{ - int integer; - int fraction; - char ch; - float f; - - integer = readInt(); - if (putPB(getPB()) == '.') { - ch = getPB(); - fraction = readInt(); - f = convertToFloat(integer, fraction); - return( f ); - } else { - return( (float)integer ); - } -} |