612 lines
12 KiB
C++
612 lines
12 KiB
C++
// -*- C++ -*-
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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "pic.h"
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extern int yyparse();
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output *out;
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int flyback_flag;
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int zero_length_line_flag = 0;
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// Non-zero means we're using a groff driver.
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int driver_extension_flag = 1;
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int compatible_flag = 0;
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int command_char = '.'; // the character that introduces lines
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// that should be passed through tranparently
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static int lf_flag = 1; // non-zero if we should attempt to understand
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// lines beginning with `.lf'
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void do_file(const char *filename);
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class top_input : public input {
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FILE *fp;
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int bol;
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int eof;
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int push_back[3];
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int start_lineno;
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public:
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top_input(FILE *);
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int get();
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int peek();
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int get_location(const char **, int *);
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};
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top_input::top_input(FILE *p) : fp(p), bol(1), eof(0)
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{
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push_back[0] = push_back[1] = push_back[2] = EOF;
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start_lineno = current_lineno;
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}
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int top_input::get()
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{
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if (eof)
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return EOF;
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if (push_back[2] != EOF) {
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int c = push_back[2];
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push_back[2] = EOF;
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return c;
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}
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else if (push_back[1] != EOF) {
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int c = push_back[1];
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push_back[1] = EOF;
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return c;
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}
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else if (push_back[0] != EOF) {
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int c = push_back[0];
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push_back[0] = EOF;
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return c;
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}
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int c = getc(fp);
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while (illegal_input_char(c)) {
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error("illegal input character code %1", int(c));
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c = getc(fp);
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bol = 0;
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}
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if (bol && c == '.') {
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c = getc(fp);
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if (c == 'P') {
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c = getc(fp);
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if (c == 'F' || c == 'E') {
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int d = getc(fp);
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if (d != EOF)
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ungetc(d, fp);
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if (d == EOF || d == ' ' || d == '\n' || compatible_flag) {
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eof = 1;
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flyback_flag = c == 'F';
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return EOF;
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}
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push_back[0] = c;
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push_back[1] = 'P';
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return '.';
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}
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if (c == 'S') {
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c = getc(fp);
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if (c != EOF)
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ungetc(c, fp);
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if (c == EOF || c == ' ' || c == '\n' || compatible_flag) {
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error("nested .PS");
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eof = 1;
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return EOF;
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}
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push_back[0] = 'S';
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push_back[1] = 'P';
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return '.';
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}
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if (c != EOF)
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ungetc(c, fp);
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push_back[0] = 'P';
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return '.';
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}
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else {
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if (c != EOF)
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ungetc(c, fp);
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return '.';
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}
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}
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if (c == '\n') {
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bol = 1;
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current_lineno++;
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return '\n';
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}
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bol = 0;
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if (c == EOF) {
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eof = 1;
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error("end of file before .PE or .PF");
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error_with_file_and_line(current_filename, start_lineno - 1,
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".PS was here");
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}
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return c;
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}
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int top_input::peek()
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{
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if (eof)
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return EOF;
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if (push_back[2] != EOF)
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return push_back[2];
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if (push_back[1] != EOF)
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return push_back[1];
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if (push_back[0] != EOF)
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return push_back[0];
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int c = getc(fp);
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while (illegal_input_char(c)) {
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error("illegal input character code %1", int(c));
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c = getc(fp);
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bol = 0;
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}
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if (bol && c == '.') {
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c = getc(fp);
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if (c == 'P') {
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c = getc(fp);
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if (c == 'F' || c == 'E') {
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int d = getc(fp);
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if (d != EOF)
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ungetc(d, fp);
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if (d == EOF || d == ' ' || d == '\n' || compatible_flag) {
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eof = 1;
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flyback_flag = c == 'F';
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return EOF;
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}
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push_back[0] = c;
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push_back[1] = 'P';
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push_back[2] = '.';
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return '.';
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}
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if (c == 'S') {
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c = getc(fp);
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if (c != EOF)
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ungetc(c, fp);
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if (c == EOF || c == ' ' || c == '\n' || compatible_flag) {
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error("nested .PS");
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eof = 1;
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return EOF;
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}
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push_back[0] = 'S';
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push_back[1] = 'P';
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push_back[2] = '.';
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return '.';
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}
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if (c != EOF)
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ungetc(c, fp);
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push_back[0] = 'P';
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push_back[1] = '.';
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return '.';
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}
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else {
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if (c != EOF)
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ungetc(c, fp);
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push_back[0] = '.';
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return '.';
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}
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}
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if (c != EOF)
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ungetc(c, fp);
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if (c == '\n')
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return '\n';
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return c;
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}
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int top_input::get_location(const char **filenamep, int *linenop)
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{
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*filenamep = current_filename;
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*linenop = current_lineno;
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return 1;
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}
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void do_picture(FILE *fp)
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{
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flyback_flag = 0;
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int c;
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while ((c = getc(fp)) == ' ')
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;
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if (c == '<') {
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string filename;
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while ((c = getc(fp)) == ' ')
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;
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while (c != EOF && c != ' ' && c != '\n') {
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filename += char(c);
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c = getc(fp);
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}
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if (c == ' ') {
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do {
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c = getc(fp);
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} while (c != EOF && c != '\n');
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}
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if (c == '\n')
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current_lineno++;
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if (filename.length() == 0)
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error("missing filename after `<'");
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else {
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filename += '\0';
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const char *old_filename = current_filename;
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int old_lineno = current_lineno;
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// filenames must be permanent
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do_file(strsave(filename.contents()));
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current_filename = old_filename;
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current_lineno = old_lineno;
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}
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out->set_location(current_filename, current_lineno);
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}
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else {
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out->set_location(current_filename, current_lineno);
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string start_line;
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while (c != EOF) {
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if (c == '\n') {
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current_lineno++;
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break;
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}
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start_line += c;
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c = getc(fp);
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}
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if (c == EOF)
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return;
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start_line += '\0';
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double wid, ht;
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switch (sscanf(&start_line[0], "%lf %lf", &wid, &ht)) {
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case 1:
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ht = 0.0;
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break;
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case 2:
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break;
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default:
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ht = wid = 0.0;
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break;
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}
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out->set_desired_width_height(wid, ht);
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out->set_args(start_line.contents());
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lex_init(new top_input(fp));
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if (yyparse())
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lex_error("giving up on this picture");
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parse_cleanup();
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lex_cleanup();
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// skip the rest of the .PF/.PE line
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while ((c = getc(fp)) != EOF && c != '\n')
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;
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if (c == '\n')
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current_lineno++;
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out->set_location(current_filename, current_lineno);
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}
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}
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void do_file(const char *filename)
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{
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FILE *fp;
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if (strcmp(filename, "-") == 0)
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fp = stdin;
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else {
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errno = 0;
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fp = fopen(filename, "r");
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if (fp == 0)
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fatal("can't open `%1': %2", filename, strerror(errno));
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}
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out->set_location(filename, 1);
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current_filename = filename;
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current_lineno = 1;
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enum { START, MIDDLE, HAD_DOT, HAD_P, HAD_PS, HAD_l, HAD_lf } state = START;
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for (;;) {
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int c = getc(fp);
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if (c == EOF)
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break;
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switch (state) {
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case START:
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if (c == '.')
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state = HAD_DOT;
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else {
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putchar(c);
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if (c == '\n') {
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current_lineno++;
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state = START;
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}
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else
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state = MIDDLE;
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}
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break;
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case MIDDLE:
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putchar(c);
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if (c == '\n') {
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current_lineno++;
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state = START;
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}
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break;
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case HAD_DOT:
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if (c == 'P')
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state = HAD_P;
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else if (lf_flag && c == 'l')
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state = HAD_l;
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else {
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putchar('.');
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putchar(c);
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if (c == '\n') {
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current_lineno++;
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state = START;
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}
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else
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state = MIDDLE;
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}
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break;
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case HAD_P:
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if (c == 'S')
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state = HAD_PS;
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else {
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putchar('.');
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putchar('P');
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putchar(c);
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if (c == '\n') {
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current_lineno++;
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state = START;
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}
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else
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state = MIDDLE;
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}
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break;
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case HAD_PS:
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if (c == ' ' || c == '\n' || compatible_flag) {
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ungetc(c, fp);
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do_picture(fp);
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state = START;
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}
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else {
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fputs(".PS", stdout);
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putchar(c);
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state = MIDDLE;
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}
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break;
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case HAD_l:
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if (c == 'f')
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state = HAD_lf;
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else {
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putchar('.');
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putchar('l');
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putchar(c);
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if (c == '\n') {
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current_lineno++;
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state = START;
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}
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else
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state = MIDDLE;
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}
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break;
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case HAD_lf:
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if (c == ' ' || c == '\n' || compatible_flag) {
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string line;
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while (c != EOF) {
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line += c;
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if (c == '\n') {
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current_lineno++;
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break;
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}
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c = getc(fp);
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}
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line += '\0';
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interpret_lf_args(line.contents());
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printf(".lf%s", line.contents());
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state = START;
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}
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else {
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fputs(".lf", stdout);
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putchar(c);
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state = MIDDLE;
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}
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break;
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default:
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assert(0);
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}
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}
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switch (state) {
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case START:
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break;
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case MIDDLE:
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putchar('\n');
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break;
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case HAD_DOT:
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fputs(".\n", stdout);
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break;
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case HAD_P:
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fputs(".P\n", stdout);
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break;
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case HAD_PS:
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fputs(".PS\n", stdout);
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break;
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case HAD_l:
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fputs(".l\n", stdout);
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break;
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case HAD_lf:
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fputs(".lf\n", stdout);
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break;
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}
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if (fp != stdin)
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fclose(fp);
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}
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#ifdef FIG_SUPPORT
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void do_whole_file(const char *filename)
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{
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// Do not set current_filename.
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FILE *fp;
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if (strcmp(filename, "-") == 0)
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fp = stdin;
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else {
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errno = 0;
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fp = fopen(filename, "r");
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if (fp == 0)
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fatal("can't open `%1': %2", filename, strerror(errno));
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}
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lex_init(new file_input(fp, filename));
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yyparse();
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parse_cleanup();
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lex_cleanup();
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}
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#endif
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void usage()
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{
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fprintf(stderr, "usage: %s [ -nvC ] [ filename ... ]\n", program_name);
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#ifdef TEX_SUPPORT
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fprintf(stderr, " %s -t [ -cvzC ] [ filename ... ]\n", program_name);
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#endif
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#ifdef FIG_SUPPORT
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fprintf(stderr, " %s -f [ -v ] [ filename ]\n", program_name);
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#endif
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exit(1);
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}
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#ifdef __MSDOS__
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static char *fix_program_name(char *arg, char *dflt)
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{
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if (!arg)
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return dflt;
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char *prog = strchr(arg, '\0');
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for (;;) {
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if (prog == arg)
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break;
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--prog;
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if (strchr("\\/:", *prog)) {
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prog++;
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break;
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}
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}
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char *ext = strchr(prog, '.');
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if (ext)
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*ext = '\0';
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for (char *p = prog; *p; p++)
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if ('A' <= *p && *p <= 'Z')
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*p = 'a' + (*p - 'A');
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return prog;
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}
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#endif /* __MSDOS__ */
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int main(int argc, char **argv)
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{
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#ifdef __MSDOS__
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argv[0] = fix_program_name(argv[0], "pic");
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#endif /* __MSDOS__ */
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program_name = argv[0];
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static char stderr_buf[BUFSIZ];
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setbuf(stderr, stderr_buf);
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int opt;
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#ifdef TEX_SUPPORT
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int tex_flag = 0;
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int tpic_flag = 0;
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#endif
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#ifdef FIG_SUPPORT
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int whole_file_flag = 0;
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int fig_flag = 0;
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#endif
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while ((opt = getopt(argc, argv, "T:CDtcvnxzpf")) != EOF)
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switch (opt) {
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case 'C':
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compatible_flag = 1;
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break;
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case 'D':
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case 'T':
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break;
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case 'f':
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#ifdef FIG_SUPPORT
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whole_file_flag++;
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fig_flag++;
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#else
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fatal("fig support not included");
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#endif
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break;
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case 'n':
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driver_extension_flag = 0;
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break;
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case 'p':
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case 'x':
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warning("-%1 option is obsolete", char(opt));
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break;
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case 't':
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#ifdef TEX_SUPPORT
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tex_flag++;
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#else
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fatal("TeX support not included");
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#endif
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break;
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case 'c':
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#ifdef TEX_SUPPORT
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tpic_flag++;
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#else
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fatal("TeX support not included");
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#endif
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break;
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case 'v':
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{
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extern const char *version_string;
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fprintf(stderr, "GNU pic version %s\n", version_string);
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fflush(stderr);
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break;
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}
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case 'z':
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// zero length lines will be printed as dots
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zero_length_line_flag++;
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break;
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case '?':
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usage();
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break;
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default:
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assert(0);
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}
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parse_init();
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#ifdef TEX_SUPPORT
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if (tpic_flag) {
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out = make_tpic_output();
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lf_flag = 0;
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}
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else if (tex_flag) {
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out = make_tex_output();
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command_char = '\\';
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lf_flag = 0;
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}
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else
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#endif
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#ifdef FIG_SUPPORT
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if (fig_flag)
|
|
out = make_fig_output();
|
|
else
|
|
#endif
|
|
out = make_troff_output();
|
|
#ifdef FIG_SUPPORT
|
|
if (whole_file_flag) {
|
|
if (optind >= argc)
|
|
do_whole_file("-");
|
|
else if (argc - optind > 1)
|
|
usage();
|
|
else
|
|
do_whole_file(argv[optind]);
|
|
}
|
|
else {
|
|
#endif
|
|
if (optind >= argc)
|
|
do_file("-");
|
|
else
|
|
for (int i = optind; i < argc; i++)
|
|
do_file(argv[i]);
|
|
#ifdef FIG_SUPPORT
|
|
}
|
|
#endif
|
|
delete out;
|
|
if (ferror(stdout) || fflush(stdout) < 0)
|
|
fatal("output error");
|
|
exit(0);
|
|
}
|
|
|