+/******************************************************************************
+ *
+ * parser -- parses device independent troff commands and calls
+ * appropriate action routines
+ *
+ * John Mellor-Crummey (Xerox Corp)
+ *
+ * Copyright 1985,6 Xerox Corporation
+ *
+ * HISTORY
+ * 24-Feb-86 Lee Moore (lee) at Xerox Webster Research Center
+ * Added new Xerox device control parsing. The syntax for the only
+ * comand is:
+ * x Xerox IP fileName
+ * x Xerox RES anchor resolution fileName
+ *
+ ******************************************************************************/
+
+
+#include <stdio.h>
+#include <ctype.h>
+
+#include "deviceinfo.h"
+#include "defs.h" /* constant and macro definitions */
+#include "externs.h" /* declarations for global variables */
+
+
+/*-----------------------------------------------------------------------------
+ * ditroffToIpress -- parses the input file calling routines to perform
+ * requested operations
+ *---------------------------------------------------------------------------*/
+ditroffToIpress(fptr)
+register FILE *fptr;
+{
+ char buffer[BUFFERSIZE];
+ int c1,c2;
+ int cmd;
+ int flag = 1;
+
+ while((cmd = getc(fptr)) != EOF)
+ {
+ switch(cmd)
+ {
+ case cmdPointSize:
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ setPointSize(internalSize(c1)+1);
+ break;
+ case cmdFont:
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ setFont(fontNumber(c1));
+ break;
+ case cmdChar:
+ if (flag = ((cmd = getc(fptr)) != EOF))
+ outputChar((unsigned int) cmd);
+ break;
+ case cmdSpecChar:
+ if (flag = (fscanf(fptr,"%s",buffer) == 1))
+ outputString(buffer);
+ break;
+ case cmdAbsHoriz:
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ hMov(c1);
+ break;
+ case cmdRelHoriz:
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ hInc(c1);
+ break;
+ case cmdAbsVert:
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ vMov(c1);
+ break;
+ case cmdRelVert:
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ vInc(c1);
+ break;
+ case cmdEol:
+ /* ignore arguments, call routine for newline */
+ flag = (fscanf(fptr,"%d %d",&c1,&c2) == 2);
+ newLine();
+ break;
+ case cmdWordSep:
+ break;
+ case cmdStippleFamily:
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ newStippleFamily(c1);
+ break;
+ case cmdNewPage:
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ newpage(c1);
+ break;
+ case cmdPushEnv:
+ pushCurrentEnv();
+ break;
+ case cmdPopEnv:
+ popSavedEnv();
+ break;
+ case cmdCharString:
+ (void) fgets(buffer,BUFFERSIZE,fptr);
+ /* no op -- this command causes no conversion
+ * not expected in ditroff output
+ */
+ break;
+ case cmdComment:
+ skipToNextLine(fptr);
+ break;
+ case cmdDraw:
+ drawCommand(fptr);
+ skipToNextLine(fptr);
+ break;
+ case cmdDevice:
+ deviceCommand(fptr);
+ skipToNextLine(fptr);
+ break;
+ case '\n':
+ linenumber++;
+ break;
+ default:
+ if(isdigit(cmd))
+ {
+ /* command is 2 digit horizontal displacement
+ * followed by a char
+ */
+ if (flag = ((c1 = getc(fptr)) != EOF))
+ {
+ hInc(c1 - '0' + 10 * (cmd - '0'));
+ if (flag = ((c1 = getc(fptr)) != EOF))
+ outputChar((unsigned int) c1);
+ }
+ break;
+ }
+ else if (white(cmd) || (cmd == '\0'))
+ break; /* handle trash in stream */
+ reportError(QUIT,"unrecognized character in input %o %c", (char *) cmd, (char *) cmd);
+ }
+ if (!flag)
+ reportError(QUIT,"error in input for ditroff command %c", (char *) cmd);
+
+ }
+}
+
+
+/*-----------------------------------------------------------------------------
+ * drawCommand -- process ditroff draw commands
+ *---------------------------------------------------------------------------*/
+drawCommand(fptr)
+register FILE *fptr;
+{
+ int c1,c2,c3,c4;
+ int cmd,flag;
+ char buffer[BUFFERSIZE];
+
+ if (flag = ((cmd = getc(fptr)) != EOF))
+ {
+ switch(cmd)
+ {
+ case drawThick: /* set line thickness */
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ lineThickness = c1;
+ break;
+ case drawStyle: /* set line style */
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ lineStyle = c1;
+ break;
+ case drawLine: /* draw from current x,y to c1,c2 */
+ /* read termination point */
+ if (flag = (fscanf(fptr,"%d %d",&c1,&c2) == 2))
+ drawline(c1,c2);
+ break;
+ case drawCircle: /* draw circle of diameter c1 with current x,y */
+ /* leftmost position on circle */
+ /* read circle diameter */
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ {
+ c2 = (c1 + 1) / 2;
+ if(!outputflag) /* won't be printed anyway */
+ break;
+ gobj_size(hor_pos,ver_pos - c2,hor_pos + c1,ver_pos + c2);
+ bitmapDrawCircle(c1);
+ }
+ break;
+ case drawEllipse: /* draw ellipse with axes c1,c2 with current x,y */
+ /* leftmost point on ellipse */
+ /* read height and width */
+ if (flag = (fscanf(fptr,"%d %d",&c1,&c2) == 2))
+ {
+ c3 = (c2 + 1) / 2;
+ if(!outputflag) /* won't be printed anyway */
+ break;
+ gobj_size(hor_pos,ver_pos - c3,hor_pos + c1,ver_pos + c3);
+ bitmapDrawEllipse(c1,c2);
+ }
+ break;
+ case drawArc: /* draw counter-clockwise arc with current x,y */
+ /* as start, c1,c2 represent relative x,y */
+ /* offset to center, c3,c4 represent relative */
+ /* x,y offset from center to ending point on arc */
+ /* read relative coords to current point: xc yc xt yt */
+ if (flag = (fscanf(fptr,"%d %d %d %d",&c1,&c2,&c3,&c4) == 4))
+ {
+ if(!outputflag) /* won't be printed anyway */
+ break;
+ g_sizearc(hor_pos,ver_pos,c1,c2,c3,c4);
+ bitmapDrawArc(c1,c2,c3,c4);
+ }
+ break;
+ case drawGremlinSpline: /* close approximation... */
+ case drawWigglyLine:
+ /* read the rest of the command line containing a
+ * list of x,y pairs into a buffer
+ */
+ (void) fgets(buffer,BUFFERSIZE,fptr);
+
+ if(!outputflag) /* won't be printed anyway */
+ break;
+ g_sizeWigglyLine(buffer);
+ bitmapDrawWigglyLine(buffer);
+ break;
+ case drawPolygon:
+ case drawUbPolygon:
+ /* read the rest of the command line containing a
+ * list of x,y pairs into a buffer
+ */
+ fgets(buffer,BUFFERSIZE,fptr);
+ iPdrawPolygon(buffer, cmd);
+ break;
+
+ default:
+ flag = 0;
+ break;
+ }
+ }
+ if (!flag)
+ reportError(QUIT,"ill formed draw command");
+}
+
+
+/*-----------------------------------------------------------------------------
+ * deviceCommand -- process ditroff device commands
+ *---------------------------------------------------------------------------*/
+deviceCommand(fptr)
+register FILE *fptr;
+{
+ int flag,n;
+ int c1;
+ char st[20];
+ char buffer[80];
+
+ if (flag = (fscanf(fptr,"%s",st) == 1))
+ {
+ switch(*st)
+ {
+ case deviceInit:
+ initDevice();
+ readDeviceInitInfo();
+ break;
+ case deviceName:
+ flag = (fscanf(fptr,"%s",devicename) == 1);
+ break;
+ case deviceResolution:
+ /* expect only resolution in spots per inch */
+ if (flag = (fscanf(fptr,"%d",&spotsPerInch) == 1))
+ setScale(spotsPerInch);
+ break;
+ case devicePause:
+ /* ignore device pauses */
+ break;
+ case deviceStop:
+ resetDevice();
+ break;
+ case deviceTrailer:
+ /* a no op */
+ break;
+ case deviceFont:
+ if (flag = (fscanf(fptr,"%d %s",&n,buffer) == 2))
+ loadFont(n,buffer);
+ break;
+ case deviceHeight:
+ /* a no op */
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ break;
+ case deviceSlant:
+ /* a no op */
+ if (flag = (fscanf(fptr,"%d",&c1) == 1))
+ break;
+ case deviceXerox:
+ /* handle Xerox extended commands */
+ parseXeroxCommand(fptr);
+ break;
+ }
+ }
+ if (!flag)
+ reportError(QUIT,"ill formed device command");
+}
+
+
+/*-----------------------------------------------------------------------------
+ * skipToNextLine -- eat any trailing junk and newline
+ *---------------------------------------------------------------------------*/
+skipToNextLine(fptr)
+FILE *fptr;
+{
+ int n;
+
+ while ((n = getc(fptr)) != '\n')
+ if (n == EOF) return;
+ linenumber++;
+}
+
+/*---------------------------------------------------------------------------
+ * parseXeroxCommand -- parse extended Xerox commands
+ *---------------------------------------------------------------------------*/
+parseXeroxCommand(fptr)
+FILE *fptr;
+{
+ char operation[80],
+ fileName[1024],
+ anchor[40],
+ resolution[40];
+
+ if( fscanf(fptr, "%s", operation) != 1 ) {
+ reportError(QUIT,"ill formed device command");
+ return;
+ }
+
+ switch (operation[0]) {
+ case xeroxDeviceInsertIP:
+ if (fscanf(fptr, "%s", fileName) != 1) {
+ reportError(QUIT,"ill formed device command");
+ return;
+ }
+
+ doSequenceInsertIP(fileName);
+ break;
+
+ case xeroxDeviceInsertRES:
+ if (fscanf(fptr, "%s %s %s", anchor, resolution, fileName) != 3) {
+ reportError(QUIT,"ill formed device command");
+ return;
+ }
+
+ doSequenceInsertRES(anchor, resolution, fileName);
+ break;
+
+ default:
+ reportError(QUIT,"unknown Xerox device request");
+ break;
+ }
+}
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