File: main.cc

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plotutils 2.4.1-15
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#include "pic.h"
#include "output.h"
#include "getopt.h"
#include "plot.h"		// libplot header file

const char *progname = "pic2plot"; // name of this program

const char *usage_appendage = " FILE...\n";

// A global; we have only one of these.  Its member function are what do
// the output of objects of various kinds (they're invoked by the
// objects' `print' operations). 
output *out;			// declared in output.h

// `out' is a pointer to an instance of the plot_output class, which
// is derived from the output class.  Any instance of the plot_output
// class looks at the following global variables, which the user
// can set on the command line.
char *display_type = (char *)"meta"; // libplot output format
char *font_name = NULL;	// initial font name (if set)
char *pen_color_name = NULL; // initial pen color (if set)
double font_size = 10.0/(8.0*72.); // font size as width of graphics display
double line_width = -0.5/(8.0*72.); // line width as width of graphics display,
				// negative means use libplot default

// any plot_output instance contains a plPlotter object; the following
// PlotterParams object contains the parameters used when creating it
plPlotterParams *plotter_params;

// flags (used by lexer)
int command_char = '.';		// char that introduces pass-thru lines
int compatible_flag = 0;	// recog. PS/PE even if not foll. by ' ', '\n'?

// flags (used by parser)
int safer_flag = 0; 		// forbid shell escapes?

// flag (could be used by driver)
int flyback_flag;
int no_centering_flag = 0;	// turn off auto-centering?
int precision_dashing = 0;	// position dashes/dots individually?

// static variables
static int had_parse_error = 0;	// parse error?
static int lf_flag = 1;		// non-zero -> try to parse `.lf' lines

/* Long options we recognize */

#define	ARG_NONE	0
#define	ARG_REQUIRED	1
#define	ARG_OPTIONAL	2

struct option long_options[] = 
{
  /* The most important option */
  { "display-type",	ARG_REQUIRED,	NULL, 'T'},
  /* Long options, most with no equivalent short option alias */
  { "bg-color",		ARG_REQUIRED,	NULL, 'q' << 8 },
  { "bitmap-size",	ARG_REQUIRED,	NULL, 'B' << 8 },
  { "emulate-color",	ARG_REQUIRED,	NULL, 'e' << 8 },
  { "font-name",	ARG_REQUIRED,	NULL, 'F' },
  { "font-size",	ARG_REQUIRED,	NULL, 'f' },
  { "line-width",	ARG_REQUIRED,	NULL, 'W' },
  { "max-line-length",	ARG_REQUIRED,	NULL, 'M' << 8 },
  { "no-centering",	ARG_NONE,	NULL, 'n' },
  { "page-size",	ARG_REQUIRED,	NULL, 'P' << 8 },
  { "pen-color",	ARG_REQUIRED,	NULL, 'C' << 8 },
  { "precision-dashing",ARG_NONE,	NULL, 'd' },
  { "rotation",		ARG_REQUIRED,	NULL, 'r' << 8},
  /* Options relevant only to raw pic2plot (refers to metafile output) */
  { "portable-output",	ARG_NONE,	NULL, 'O' },
  /* Documentation options */
  { "help-fonts",	ARG_NONE,	NULL, 'f' << 8 },
  { "list-fonts",	ARG_NONE,	NULL, 'l' << 8 },
  { "version",		ARG_NONE,	NULL, 'V' << 8 },
  { "help",		ARG_NONE,	NULL, 'h' << 8 },
  { NULL,		0,		NULL,  0}
};
    
/* null-terminated list of options that we don't show to the user */
int hidden_options[] = { 0 };

// forward references
void do_file (const char *filename);
void do_picture (FILE *fp);

/* from libcommon */
extern "C" int display_fonts (const char *display_type, const char *progname);
extern "C" int list_fonts (const char *display_type, const char *progname);
extern "C" void display_usage (const char *progname, const int *omit_vals, const char *appendage, bool fonts);
extern "C" void display_version (const char *progname); 
extern "C" voidptr_t xcalloc (size_t nmemb, size_t size);
extern "C" voidptr_t xmalloc (size_t size);
extern "C" voidptr_t xrealloc (voidptr_t p, size_t length);
extern "C" char *xstrdup (const char *s);

//////////////////////////////////////////////////////////////////////
// TOP_INPUT class.
//////////////////////////////////////////////////////////////////////

class top_input : public input 
{
public:
  // ctor
  top_input (FILE *);
  // public functions
  int get (void);
  int peek (void);
  int get_location (const char **filenamep, int *linenop);
private:
  FILE *fp;
  int bol;
  int eof;
  int push_back[3];
  int start_lineno;
};

top_input::top_input(FILE *p) : fp(p), bol(1), eof(0)
{
  push_back[0] = push_back[1] = push_back[2] = EOF;
  start_lineno = current_lineno;
}

int 
top_input::get(void)
{
  if (eof)
    return EOF;
  if (push_back[2] != EOF) 
    {
      int c = push_back[2];
      push_back[2] = EOF;
      return c;
    }
  else if (push_back[1] != EOF) 
    {
      int c = push_back[1];
      push_back[1] = EOF;
      return c;
    }
  else if (push_back[0] != EOF) 
    {
      int c = push_back[0];
      push_back[0] = EOF;
      return c;
    }
  int c = getc(fp);
  while (illegal_input_char(c)) 
    {
      error("illegal input character code %1", int(c));
      c = getc(fp);
      bol = 0;
    }
  if (bol && c == '.') 
    {
      c = getc(fp);
      if (c == 'P') 
	{
	  c = getc(fp);
	  if (c == 'F' || c == 'E') 
	    {
	      int d = getc(fp);
	      if (d != EOF)
		ungetc(d, fp);
	      if (d == EOF || d == ' ' || d == '\n' || compatible_flag) 
		{
		  eof = 1;
		  flyback_flag = (c == 'F');
		  return EOF;
		}
	      push_back[0] = c;
	      push_back[1] = 'P';
	      return '.';
	    }
	  if (c == 'S') 
	    {
	      c = getc(fp);
	      if (c != EOF)
		ungetc(c, fp);
	      if (c == EOF || c == ' ' || c == '\n' || compatible_flag) 
		{
		  error("nested .PS");
		  eof = 1;
		  return EOF;
		}
	      push_back[0] = 'S';
	      push_back[1] = 'P';
	      return '.';
	    }
	  if (c != EOF)
	    ungetc(c, fp);
	  push_back[0] = 'P';
	  return '.';
	}
      else 
	{
	  if (c != EOF)
	    ungetc(c, fp);
	  return '.';
	}
    }
  if (c == '\n') 
    {
      bol = 1;
      current_lineno++;
      return '\n';
    }
  bol = 0;
  if (c == EOF) 
    {
      eof = 1;
      error("end of file before .PE or .PF");
      error_with_file_and_line(current_filename, start_lineno - 1,
			       ".PS was here");
    }
  return c;
}

int 
top_input::peek(void)
{
  if (eof)
    return EOF;
  if (push_back[2] != EOF)
    return push_back[2];
  if (push_back[1] != EOF)
    return push_back[1];
  if (push_back[0] != EOF)
    return push_back[0];
  int c = getc(fp);
  while (illegal_input_char(c)) 
    {
      error("illegal input character code %1", int(c));
      c = getc(fp);
      bol = 0;
    }
  if (bol && c == '.') 
    {
      c = getc(fp);
      if (c == 'P') 
	{
	  c = getc(fp);
	  if (c == 'F' || c == 'E') 
	    {
	      int d = getc(fp);
	      if (d != EOF)
		ungetc(d, fp);
	      if (d == EOF || d == ' ' || d == '\n' || compatible_flag) 
		{
		  eof = 1;
		  flyback_flag = (c == 'F');
		  return EOF;
		}
	      push_back[0] = c;
	      push_back[1] = 'P';
	      push_back[2] = '.';
	      return '.';
	    }
	  if (c == 'S') 
	    {
	      c = getc(fp);
	      if (c != EOF)
		ungetc(c, fp);
	      if (c == EOF || c == ' ' || c == '\n' || compatible_flag) 
		{
		  error("nested .PS");
		  eof = 1;
		  return EOF;
		}
	      push_back[0] = 'S';
	      push_back[1] = 'P';
	      push_back[2] = '.';
	      return '.';
	    }
	  if (c != EOF)
	    ungetc(c, fp);
	  push_back[0] = 'P';
	  push_back[1] = '.';
	  return '.';
	}
      else 
	{
	  if (c != EOF)
	    ungetc(c, fp);
	  push_back[0] = '.';
	  return '.';
	}
    }
  if (c != EOF)
    ungetc(c, fp);
  if (c == '\n')
    return '\n';
  return c;
}

int 
top_input::get_location(const char **filenamep, int *linenop)
{
  *filenamep = current_filename;
  *linenop = current_lineno;
  return 1;
}

//////////////////////////////////////////////////////////////////////
// End of TOP_INPUT class, beginning of main().
//////////////////////////////////////////////////////////////////////

int 
main (int argc, char **argv)
{
  bool do_list_fonts = false;	/* show a list of fonts? */
  bool show_fonts = false;	/* supply help on fonts? */
  bool show_usage = false;	/* show usage message? */
  bool show_version = false;	/* show version message? */
  int errcnt = 0;		/* errors encountered */
  int opt_index;		/* long option index */
  int option;			/* option character */

  static char stderr_buf[BUFSIZ];
  setbuf(stderr, stderr_buf);

  /* set global */
  program_name = progname;

#if 0
/* could add -C, -S options to set these */
  compatible_flag = 1;	// allow non-' ', non-'\n' after .PS ?
  safer_flag = 1;		// forbid shell escapes
#endif

  plotter_params = pl_newplparams ();
  while ((option = getopt_long (argc, argv, "T:OndF:f:W:", long_options, &opt_index)) != EOF)
    {
      if (option == 0)
	option = long_options[opt_index].val;
      
      switch (option) 
	{
	case 'T':		/* Display type, ARG REQUIRED      */
	  display_type = (char *)xmalloc (strlen (optarg) + 1);
	  strcpy (display_type, optarg);
	  break;
	case 'O':		/* Ascii output */
	  pl_setplparam (plotter_params, "META_PORTABLE", (voidptr_t)"yes");
	  break;
	case 'n':		/* No centering */
	  no_centering_flag = 1;
	  break;
	case 'd':		/* Draw dots/dashes individually */
	  precision_dashing = 1;
	  break;
	case 'F':		/* set the initial font */
	  font_name = (char *)xmalloc (strlen (optarg) + 1);
	  strcpy (font_name, optarg);
	  break;
	case 'f':		/* Font size, ARG REQUIRED	*/
	  {
	    double local_font_size;
	    char s[4];
	    
	    if (sscanf (optarg, "%lf %3s", &local_font_size, s) == 2
		&& strcmp (s, "pt") == 0)
	      local_font_size /= (8.0 * 72.0); // express as width of display
	    else if (sscanf (optarg, "%lf", &local_font_size) <= 0)
	      {
		fprintf (stderr,
			 "%s: error: font size must be a number, e.g. `0.01736' or `10pt', was `%s'\n",
			 progname, optarg);
		errcnt++;
		break;
	      }
	    if (local_font_size >= 1.0)
	      fprintf (stderr, "%s: ignoring too-large font size\n",
		       progname);
	    else if (local_font_size < 0.0)
	      fprintf (stderr, "%s: ignoring negative font size\n",
		       progname);
	    else
	      font_size = local_font_size;
	    break;
	  }
	case 'W':		/* Line width, ARG REQUIRED	*/
	  {
	    double local_line_width;
	    char s[4];
	    
	    if (sscanf (optarg, "%lf %3s", &local_line_width, s) == 2
		&& strcmp (s, "pt") == 0)
	      local_line_width /= (8.0 * 72.0); // express as width of display
	    else if (sscanf (optarg, "%lf", &local_line_width) <= 0)
	      {
		fprintf (stderr,
			 "%s: error: line thickness must be a number, e.g. `0.00868' or `0.5pt', was `%s'\n",
			 progname, optarg);
		errcnt++;
		break;
	      }
	    if (local_line_width >= 1.0)
	      fprintf (stderr, "%s: ignoring too-large line thickness\n",
		       progname);

	    /* N.B. We don't rule out negative line thickness, because it's
	       interpreted as a request to use libplot's default line
	       thickness.  (Which depends on output format; for example,
	       with the `-T X' option it'll yield a zero-thickness X11
	       line, which means a Bresenham line.) */

	    else
	      line_width = local_line_width;
	    break;
	  }
	case 'e' << 8:		/* Emulate color via grayscale */
	  pl_setplparam (plotter_params, "EMULATE_COLOR", (voidptr_t)optarg);
	  break;
	case 'C' << 8:		/* set the initial pen color */
	  pen_color_name = (char *)xmalloc (strlen (optarg) + 1);
	  strcpy (pen_color_name, optarg);
	  break;
	case 'q' << 8:		/* set the initial background color */
	  pl_setplparam (plotter_params, "BG_COLOR", (voidptr_t)optarg);
	  break;
	case 'B' << 8:		/* Bitmap size */
	  pl_setplparam (plotter_params, "BITMAPSIZE", (voidptr_t)optarg);
	  break;
	case 'M' << 8:		/* Max line length */
	  pl_setplparam (plotter_params, "MAX_LINE_LENGTH", (voidptr_t)optarg);
	  break;
	case 'P' << 8:		/* Page size */
	  pl_setplparam (plotter_params, "PAGESIZE", (voidptr_t)optarg);
	  break;
	case 'r' << 8:		/* Rotation angle */
	  pl_setplparam (plotter_params, "ROTATION", (voidptr_t)optarg);
	  break;
	case 'V' << 8:		/* Version */
	  show_version = true;
	  break;
	case 'f' << 8:		/* Fonts */
	  show_fonts = true;
	  break;
	case 'l' << 8:		/* Fonts */
	  do_list_fonts = true;
	  break;
	case 'h' << 8:		/* Help */
	  show_usage = true;
	  break;
	default:
	  errcnt++;
	  break;
	}
    }

  if (errcnt > 0)
    {
      fprintf (stderr, "Try `%s --help' for more information\n", 
	       progname);
      return EXIT_FAILURE;
    }
  if (show_version)
    {
      display_version (progname);
      return EXIT_SUCCESS;
    }
  if (do_list_fonts)
    {
      int success = true;

      success = list_fonts (display_type, progname);
      if (success)
	return EXIT_SUCCESS;
      else
	return EXIT_FAILURE;
    }
  if (show_fonts)
    {
      int success = true;

      success = display_fonts (display_type, progname);
      if (success)
	return EXIT_SUCCESS;
      else
	return EXIT_FAILURE;
    }
  if (show_usage)
    {
      display_usage (progname, hidden_options, usage_appendage, true);
      return EXIT_SUCCESS;
    }

  /* at most, only file names remain, so initialize parser */
  parse_init();

  out = make_plot_output();
  command_char = 014;	// bogus to avoid seeing `commands'
  lf_flag = 0;

  /* invoke do_file() on stdin or on each remaining file */
  if (optind >= argc)
    do_file ("-");
  else
    for (int i = optind; i < argc; i++)
      do_file (argv[i]);

  delete out;
  if (ferror(stdout) || fflush(stdout) < 0)
    fatal ("output error");

  /* clean up */
  pl_deleteplparams (plotter_params);

  return had_parse_error ? EXIT_FAILURE : EXIT_SUCCESS;
}

void 
do_file (const char *filename)
{
  FILE *fp;
  if (strcmp(filename, "-") == 0)
    fp = stdin;
  else 
    {
      errno = 0;
      fp = fopen(filename, "r");
      if (fp == 0)
	fatal ("can't open `%1': %2", filename, strerror(errno));
    }
  out->set_location (filename, 1);
  current_filename = filename;
  current_lineno = 1;
  enum { START, MIDDLE, HAD_DOT, HAD_P, HAD_PS, HAD_l, HAD_lf } state = START;
  for (;;) 
    {
      int c = getc(fp);
      if (c == EOF)		// break out of for loop on EOF, only
	break;
      switch (state) 
	{
	case START:
	  if (c == '.')
	    state = HAD_DOT;
	  else 
	    {
	      if (c == '\n') 
		{
		  current_lineno++;
		  state = START;
		}
	      else		// dnl
		state = MIDDLE;
	    }
	  break;
	case MIDDLE:
	  // discard chars until newline seen; switch back to START
	  if (c == '\n') 
	    {
	      current_lineno++;
	      state = START;
	    }
	  break;
	case HAD_DOT:
	  if (c == 'P')
	    state = HAD_P;
	  else if (lf_flag && c == 'l')
	    state = HAD_l;
	  else 
	    {
	      if (c == '\n') 
		{
		  current_lineno++;
		  state = START;
		}
	      else		// dnl
		state = MIDDLE;
	    }
	  break;
	case HAD_P:
	  if (c == 'S')
	    state = HAD_PS;
	  else  
	    {
	      if (c == '\n') 
		{
		  current_lineno++;
		  state = START;
		}
	      else		// dnl
		state = MIDDLE;
	    }
	  break;
	case HAD_PS:
	  if (c == ' ' || c == '\n' || compatible_flag) 
	    {
	      ungetc(c, fp);
	      do_picture(fp);	// do the picture, incl. args of .PS if any
	      state = START;
	    }
	  else			// dnl
	    state = MIDDLE;
	  break;
	case HAD_l:
	  if (c == 'f')
	    state = HAD_lf;
	  else 
	    {
	      if (c == '\n') 
		{
		  current_lineno++;
		  state = START;
		}
	      else		// dnl
		state = MIDDLE;
	    }
	  break;
	case HAD_lf:
	  if (c == ' ' || c == '\n' || compatible_flag) 
	    {
	      string line;

	      while (c != EOF) 
		{
		  line += c;
		  if (c == '\n') 
		    {
		      current_lineno++;
		      break;
		    }
		  c = getc(fp);
		}
	      line += '\0';
	      interpret_lf_args(line.contents());
	      state = START;
	    }
	  else			// dnl
	    state = MIDDLE;
	  break;
	default:
	  assert(0);
	}
    }

  // exit gracefully when EOF seen
  if (fp != stdin)
    fclose(fp);
}

void 
do_picture(FILE *fp)
{
  flyback_flag = 0;
  int c;
  while ((c = getc(fp)) == ' ')
    ;
  if (c == '<') 
    /* first nonblank character after .PS is '<' */
    {
      string filename;
      while ((c = getc(fp)) == ' ')
	;
      while (c != EOF && c != ' ' && c != '\n') 
	{
	  filename += char(c);
	  c = getc(fp);
	}
      if (c == ' ') 
	{
	  do 
	    {
	      c = getc(fp);
	    } while (c != EOF && c != '\n');
	}
      if (c == '\n') 
	current_lineno++;
      if (filename.length() == 0)
	error("missing filename after `<'");
      else 
	{
	  filename += '\0';
	  const char *old_filename = current_filename;
	  int old_lineno = current_lineno;
	  // filenames must be permanent
	  do_file (strsave(filename.contents())); // recursive call
	  current_filename = old_filename;
	  current_lineno = old_lineno;
	}
      out->set_location (current_filename, current_lineno);
    }
  else 
    /* first nonblank character after .PS is not '<' */
    {
      out->set_location (current_filename, current_lineno);

      /* get the starting line */
      string start_line;
      while (c != EOF) 
	{
	  if (c == '\n') 
	    {
	      current_lineno++;
	      break;
	    }
	  start_line += c;
	  c = getc(fp);
	}
      if (c == EOF)
	return;
      start_line += '\0';

      /* parse starting line for height and width */
      double wid, ht;
      switch (sscanf(&start_line[0], "%lf %lf", &wid, &ht)) 
	{
	case 1:
	  ht = 0.0;
	  break;
	case 2:
	  break;
	default:
	  ht = wid = 0.0;
	  break;
	}
      out->set_desired_width_height (wid, ht);
      out->set_args (start_line.contents());

      // do the parse
      lex_init (new top_input(fp));
      if (yyparse()) 
	{
	  had_parse_error = 1;
	  lex_error ("giving up on this picture");
	}
      parse_cleanup();
      lex_cleanup();

      // skip the rest of the .PF/.PE line
      while ((c = getc(fp)) != EOF && c != '\n')
	;
      if (c == '\n')
	current_lineno++;
      out->set_location (current_filename, current_lineno);
    }
}