/* $Id: dmp.c,v 1.14 2005/08/24 10:54:02 taco Exp $ Public domain. */ /* dmp x * * This program reads device-independent troff output files, * and converts them into a symbolic form understood by MetaPost. Some * of the code was borrowed from DVItoMP. It understands all the D? graphics * functions that dpost does but it ignores `x X' device control functions * such as `x X SetColor:...', `x X BeginPath:', and `x X DrawPath:...'. * * The output file is a sequence of MetaPost picture expressions, one for every * page in the input file. It makes no difference where the input file comes * from, but it is intended to process the result of running eqn and troff on * the output of MPtoTR. Such a file contains one page for every btex...etex * block in the original input. This program then creates a corresponding * sequence of MetaPost picture expressions for use as an auxiliary input file. * Since MetPost expects such files to have the extension .mpx, the output * is sometimes called an `mpx' file. */ /* The |banner| string defined here should be changed whenever this program * gets modified. */ char *banner="% Written by DMP, Version 0.99"; /* first line of output */ char *term_banner="This is DMP, Version 0.99"; #include #include #include #include #include "dmp.h" #ifndef NULL #define NULL ((char*) 0) #endif #ifndef PI #define PI 3.14159265358979323846 #endif #define POOLMAX 65000 /* total characters in all font and char names */ #define FCOUNT 100 /* maximum number of fonts */ #define SHIFTS 100 /* maximum number of characters with special shifts */ #define line_length 79 /* maximum output line length (must be at least 60) */ #define Hprime 307 /* much bigger than max(chars/font,fonts/job) */ #define MAXCHARS 256 /* character codes fall in the range 0..MAXCHARS-1 */ #define LLENGTH 1024 /* one more than maximum line length for troff output */ #define is_specchar(c) (!gflag && (c)<=2) /* does charcode c identify a special char? */ #define LWscale 0.03 /* line width for graphics as a fraction of pointsize */ #define YCORR 12.0 /* V coordinate of reference point in (big) points */ char strpool[POOLMAX]; /* text for font names and char names */ int poolsize = 0; /* chars used so far in strpool */ char *texname[FCOUNT]; /* TeX names (null-terminated strings) */ int font_num[FCOUNT]; /* external font numbers */ float font_design_size[FCOUNT]; /* design size in TeX points */ struct hcell *charcodes[FCOUNT];/* hash tables for translating char names */ int next_specfnt[FCOUNT]; /* used to link special fonts together */ float charwd[FCOUNT][MAXCHARS]; /* width/ptsize indexed [font num][char code] */ int nfonts; /* no. of internal font nums (texname indices)*/ int shiftchar[SHIFTS]; /* charcode of character to shift, else -1 */ float shifth[SHIFTS],shiftv[SHIFTS]; /* shift vals/fontsize (y is upward) */ int shiftptr = 0; /* number of entries in shift tables */ int shiftbase[FCOUNT]; /* initial index into shifth,shiftv,shiftchar */ int specfnt = FCOUNT; /* int. num. of first special font (or FCOUNT)*/ int *specf_tail = &specfnt; /* tail of specfnt list (*specf_tail==FCOUNT) */ FILE *trf; /* the input file (troff output) */ FILE *mpxf; /* the output file */ struct hcell *trfonts; /* hash tab for internal nums of troff fonts */ float unit = 0.0; /* (big) points per troff unit (0 when unset)*/ int h,v; /* current position in tr. units (v downward)*/ float cursize; /* current type size in (big) points */ int curfont; /* internal number for current font */ float Xslant; /* degrees additional slant for all fonts */ float Xheight; /* yscale fonts to this height if nonzero */ char *dbname = "trfonts.map"; /* file for table of troff & TFM font names */ char *adjname = "trchars.adj"; /* file for character shift amounts */ int lnno = 0; /* line num. in troff output file (our input) */ float sizescale; /* groff font size scaling factor */ int gflag = 0; /* non-zero if using groff fonts */ void quit(char *msg1, char *msg2, char *msg3) { fprintf(stderr,"DMP abort at troff output line %d:\n%s%s%s\n", lnno, msg1, msg2, msg3); exit(1); } void warn(char *msg1, char *msg2, char *msg3) { fprintf(stderr,"DMP warning at troff output line %d:\n%s%s%s\n", lnno, msg1, msg2, msg3); } void add_to_pool(char c) { if (poolsize==POOLMAX) quit("Need to increase POOLMAX","",""); else strpool[poolsize++] = c; } /************************************************************** Hash tables ***************************************************************/ typedef struct hcell { char* lab; int datum; } Hcell; #define new_htab (Hcell*) calloc((unsigned)Hprime, (unsigned)sizeof(Hcell)) int hash(char *s) { register int r; for(r=0; *s!=0; s++) { /* GROFF - in font metrics file the character name may be 8bit groff_font(5): Groff supports eight bit characters; groff_out(5): Note that single characters can have the eighth bit set, as can the names of fonts and special characters. */ r = (r<<1) + *(unsigned char*)s; while (r>=Hprime) r-=Hprime; } return r; } /* Find or insert the given string in the hash table and return the address of the datum. */ Hcell *failure; /* null unless last hfind failed (used below) */ int *hfind(char *s, Hcell* htab) { register Hcell *p; register int cnt = Hprime; failure = (Hcell *) 0; p = &htab[hash(s)]; do { if (p->lab==NULL) { failure = p; if (s<&strpool[0] || s>=&strpool[POOLMAX]) { p->lab = &strpool[poolsize]; do add_to_pool(*s); while (*s++!='\0'); } else p->lab = s; return &p->datum; } if (strcmp(s, p->lab)==0) return &p->datum; if (p==htab) p= &htab[Hprime-1]; else p--; } while (--cnt >= 0); quit("Need to increase Hprime","",""); return (int*)0; /* keep lint happy */ } /* If the last hfind() failed, undo the insertion and return zero (FALSE). */ int hfound(void) { if (failure==(Hcell *)0) return 1; failure->lab = NULL; return 0; } /************************************************************** Scanning Numbers ***************************************************************/ /* The standard functions atoi(), atof(), and sscanf() provide ways of reading numbers from strings but they give no indication of how much of the string is consumed. These homemade versions don't parse scientific notation. */ char *arg_tail; /* char after the number just gotten; NULL on failure */ int get_int(char *s) { register int i, d, neg; if (s==NULL) goto bad; for (neg=0;; s++) if (*s=='-') neg=!neg; else if (*s!=' ' && *s!='\t') break; if (i= *s-'0', 0>i||i>9) goto bad; while (d= *++s-'0', 0<=d&&d<=9) i = 10*i + d; arg_tail = s; return neg ? -i : i; bad:arg_tail = NULL; return 0; } /* GROFF font description files use octal character codes groff_font(5): The code can be any integer. If it starts with a 0 it will be interpreted as octal; if it starts with 0x or 0X it will be intepreted as hexadecimal. */ int get_int_map (char *s) { register int i; if (s==NULL) goto bad; i=strtol(s,&arg_tail,0); if (s==arg_tail) goto bad; return i; bad:arg_tail = NULL; return 0; } /* Troff output files contain few if any non-integers, but this program is prepared to read floats whenever they seem reasonable; i.e., when the number is not being used for character positioning. (For non-PostScript applications h and v are usually in pixels and should be integers.) */ float get_float(char *s) { register int d, neg, digits; register float x, y; digits = 0; if (s!=NULL) { for (neg=0;; s++) if (*s=='-') neg=!neg; else if (*s!=' ' && *s!='\t') break; x = 0.0; while (d= *s-'0', 0<=d&&d<=9) { x = 10.0*x + d; digits++; s++; } if (*s=='.') { y = 1.0; while (d= *++s-'0', 0<=d&&d<=9) { y /= 10.0; x += y*d; digits++; } } } if (digits==0) { arg_tail = NULL; return 0.0; } arg_tail = s; return neg ? -x : x; } /* GROFF font description files have metrics field of comma-separated integers. Traditional troff have a float in this position. The value is not used anyway - thus just skip the value, eat all non-space chars. */ float get_float_map (char *s) { if (s!=NULL) { while (isspace(*s)) s++; while (!isspace(*s) && *s) s++; } arg_tail = s; return 0; } /************************************************************** Reading Initialization Files ***************************************************************/ /* Read the database file, reserve internal font numbers and set the texname[] entries. Each line in the database file contains \t,PostScript-name>\t or just \t,PostScript-name> if the TeX name matches the PostScript name. ("\t" means one or more tabs.) */ void read_fmap( char *dbase) { FILE *fin; int c; /* last character read */ char *nam; /* a font name being read */ nfonts = 0; fin = fsearch(dbase,"",DB_TYPE); trfonts = new_htab; while ((c=getc(fin))!=EOF) { if (nfonts==FCOUNT) quit("Need to increase FCOUNT","",""); nam = &strpool[poolsize]; for (;c!='\t'; c=getc(fin)) add_to_pool(c); add_to_pool(0); *hfind(nam, trfonts) = nfonts; texname[nfonts] = &strpool[poolsize]; do { poolsize = texname[nfonts] - strpool; do c=getc(fin); while (c=='\t'); for (;c!='\t' && c!='\n'; c=getc(fin)) add_to_pool(c); add_to_pool(0); } while (c=='\t'); font_num[nfonts] = -1; /* indicate font is not mounted */ nfonts++; } fclose(fin); } /* Some characters need their coordinates shifted in order to agree with troff's view of the world. Logically, this information belongs in the font description files but it actually resides in a PostScript prolog that the troff output processor dpost reads. Since that file is in PostScript and subject to change, we read the same information from a small auxiliary file that gives shift amounts relative to the font size with y upward. */ /* GROFF NOTE: The PostScript prologue in GNU groff's font directory does not contain any character shift information, so the following function becomes redundant. Simply keeping an empty "trchars.adj" file around will do fine without requiring any changes to this program. */ void read_char_adj(char *adjfile) { FILE* fin; char buf[200]; int i; fin = fsearch(adjfile, "", DB_TYPE); for (i=0; i255 || sizes[0]=0;) (void) getc(tf); } fclose(tf); } /* Given one line from the character description file for the font with internal number f, save the appropriate data in the charcodes[f] table. A return value of zero indicates a syntax error. */ /* GROFF NOTE: GNU groff uses an extended font description file format documented in groff_font(5). In order to allow parsing of groff's font files, this function needs to be rewritten as follows: 1. The `metrics' field parsed by "get_float(lin);" may include a comma-separated list of up to six decimal integers rather than just a single floating-point number. 2. The `charcode' field parsed by "lastcode = get_int(arg_tail);" may be given either in decimal, octal, or hexadecimal format. */ int scan_desc_line(int f, char *lin) { static int lastcode; char *s; s = &strpool[poolsize]; while (*lin!=' ' && *lin!='\t' && *lin!='\0') add_to_pool(*lin++); add_to_pool('\0'); while (*lin==' ' || *lin=='\t') lin++; if (*lin=='"') { if (lastcodeline_length-2) { if (state==normal) { putc('"',mpxf); state = special; } putc('\n',mpxf); print_col = 0; } if (state==normal) if (printable) putc(c,mpxf); else { fprintf(mpxf,"\"&char%d",c); print_col += 2; } else { if (state==special) { putc('&',mpxf); print_col++; } if (printable) { fprintf(mpxf,"\"%c",c); print_col++; } else fprintf(mpxf,"char%d",c); } print_col += l; state = printable ? normal : special; } /* The end_char_string procedure gets the string ended properly and ensures that there is room for |l| more characters on the output line. */ void end_char_string(int l) { while (state>special) { putc('"',mpxf); print_col++; state--; } if (print_col+l>line_length) { putc('\n',mpxf); print_col = 0; } state = initial; /* get ready to print the next string */ } /************************************************************** Page and Character Output ***************************************************************/ char font_used[FCOUNT]; /* nonzero for fonts used on this page */ int fonts_used; /* nonzero if any font been used on this page */ int graphics_used; /* nonzero if any graphics seen on this page */ float str_h1,str_v; /* corrected start pos for current out string */ float str_h2; /* where the current output string ends */ int str_f; /* internal font num for cur. output string */ float str_size; /* point size for this text string */ /* Before using any fonts we need to define a MetaPost macro for typesetting character strings. */ void prepare_font_use(void) { int k; for (k=0;k0) fprintf(mpxf, "\n "); } /* We maintain the invariant that str_f is -1 when there is no output string under construction. */ void finish_last_char(void) { float m,x,y; /* font scale, MetaPost coords of reference point */ if (str_f>=0) { m = str_size/font_design_size[str_f]; x = str_h1*unit; y = YCORR-str_v*unit; if (fabs(x)>=4096.0 || fabs(y)>=4096.0 || m>=4096.0 || m<0) { warn("text out of range ignored","",""); end_char_string(67); } else end_char_string(47); fprintf(mpxf,")infont n%d", font_num[str_f]); slant_and_ht(); fprintf(mpxf,",%.5f,%.4f,%.4f);\n", m, x,y); str_f = -1; } } /* Output character number c in the font with internal number f. */ void set_num_char(int f,int c) { float hh, vv; /* corrected versions of h, v */ int i; hh = h; vv = v; for (i=shiftbase[f]; shiftchar[i]>=0; i++) if (shiftchar[i]==c) { hh += (cursize/unit)*shifth[i]; vv += (cursize/unit)*shiftv[i]; break; } /* if (c==0) quit("attempt to typeset an invalid character","",""); */ if (hh-str_h2>=1.0 || str_h2-hh>=1.0 || vv-str_v>=1.0 || str_v-vv>=1.0 || f!=str_f || cursize!=str_size) { if (str_f>=0) finish_last_char(); else if (!fonts_used) prepare_font_use(); /* first font usage on this page */ if (!font_used[f]) first_use(f); /* first use of font f on this page */ fprintf(mpxf,"s(("); print_col = 3; str_f=f; str_v=vv; str_h1=hh; str_size = cursize; } print_char(c); str_h2 = hh + cursize*charwd[f][c]; } /* Output a string. */ void set_string (char *cname) { float hh; /* corrected version of h, current horisontal position */ if (!*cname) return; hh = h; set_num_char(curfont,*cname); hh+= cursize*charwd[curfont][*cname]; while (*++cname){ print_char(*cname); hh += cursize*charwd[curfont][*cname]; } h = rint(hh); finish_last_char(); } /* The following initialization and clean-up is required. */ void start_picture(void) { fonts_used = graphics_used = 0; str_f = -1; str_v = 0.0; str_h2 = 0.0; str_size = 0.0; fprintf(mpxf,"begingroup save C,D,p,s,n; picture p; p=nullpicture;\n"); } void stop_picture(void) { if (str_f>=0) finish_last_char(); fprintf(mpxf,"p endgroup\n"); } /************************************************************** Special Characters ***************************************************************/ /* Given the troff name of a special character, this routine finds its definition and copies it to the MPX file. It also finds the name of the vardef macro, puts it in the string pool, and index where the string starts. The name should be C.. */ char specintro[] = "vardef "; /* MetaPost name follows this */ #define speci 7 /* length of the above string */ int copy_spec_char(char *cname) { int k = 0; /* how much of specintro so far */ FILE *deff; int c, s; deff = fsearch(cname, "", CHARLIB_TYPE); while (k=0) finish_last_char(); if (!fonts_used) prepare_font_use(); if (!font_used[f]) first_use(f); if (spec_tab==(Hcell*)0) spec_tab = new_htab; flagp = hfind(cname, spec_tab); if (*flagp==0) *flagp = copy_spec_char(cname); /* this won't be zero */ fprintf(mpxf, "s(%s(n%d)", &strpool[*flagp], font_num[f]); slant_and_ht(); fprintf(mpxf, ",%.5f,%.4f,%.4f);\n", cursize/font_design_size[f], h*unit, YCORR-v*unit); } } /************************************************************** Font Definitions ***************************************************************/ /* Mount the font with troff name nam at external font number n and read any necessary font files. */ void do_font_def(int n, char *nam) { int f, k; f = *hfind(nam, trfonts); if (!hfound()) quit("Font ",nam," was not in map file"); if (font_design_size[f]==0) { read_fontdesc(nam); read_tfm(f); } for (k=0; k0; i--) for (j=0; j=0;) t += (a - circangle(t))/Speed; return t; } /************************************************************** Troff Graphics ***************************************************************/ float gx, gy; /* current point for graphics (init. (h,YCORR/unit-v) */ void prepare_graphics(void) { fprintf(mpxf,"vardef D(expr d)expr q =\n"); fprintf(mpxf," addto p doublepath q withpen pencircle scaled d; enddef;\n"); graphics_used = 1; } /* This function prints the current position (gx,gy). Then if it can read dh dv from string s, it increments (gx,gy) and prints "--". By returning the rest of the string s or NULL if nothing could be read from s, it provides the argument for the next iteration. */ char *do_line(char *s) { float dh, dv; fprintf(mpxf, "(%.3f,%.3f)", gx*unit, gy*unit); dh = get_float(s); dv = get_float(arg_tail); if (arg_tail==NULL) return NULL; gx += dh; gy -= dv; fprintf(mpxf,"--\n"); return arg_tail; } /* Function spline_seg() reads two pairs of (dh,dv) increments and prints the corresponding quadratic B-spline segment, leaving the ending point to be printed next time. The return value is the string with the first (dh,dv) pair lopped off. If only one pair of increments is found, we prepare to terminate the iteration by printing last time's ending point and returning NULL. */ char * spline_seg(char *s) { float dh1, dv1, dh2, dv2; dh1 = get_float(s); dv1 = get_float(arg_tail); if (arg_tail==NULL) quit("Missing spline increments","",""); s = arg_tail; fprintf(mpxf, "(%.3f,%.3f)", (gx+.5*dh1)*unit, (gy-.5*dv1)*unit); gx += dh1; gy -= dv1; dh2 = get_float(s); dv2 = get_float(arg_tail); if (arg_tail==NULL) return NULL; fprintf(mpxf, "..\ncontrols (%.3f,%.3f) and (%.3f,%.3f)..\n", (gx-dh1/6.0)*unit, (gy+dv1/6.0)*unit, (gx+dh2/6.0)*unit, (gy-dv2/6.0)*unit); return s; } /* Draw an ellipse with the given major and minor axes. */ void do_ellipse(float a, float b) { fprintf(mpxf, "makepath(pencircle xscaled %.3f\n yscaled %.3f", a*unit, b*unit); fprintf(mpxf, " shifted (%.3f,%.3f));\n", (gx+.5*a)*unit, gy*unit); gx += a; } /* Draw a counter-clockwise arc centered at (cx,cy) with initial and final radii (ax,ay) and (bx,by) respectively. */ void do_arc(float cx, float cy, float ax, float ay, float bx, float by) { float t1, t2; t1 = circtime(atan2(ay, ax)); t2 = circtime(atan2(by, bx)); if (t2 < t1) t2 += 8.0; fprintf(mpxf, "subpath (%.5f,%.5f) of\n", t1, t2); fprintf(mpxf, " makepath(pencircle scaled %.3f shifted (%.3f,%.3f));\n", 2.0*sqrt(ax*ax+ay*ay)*unit, cx*unit, cy*unit); gx = cx + bx; gy = cy + by; } /* string s is everything following the initial `D' in a troff graphics command. */ void do_graphic(char *s) { float h1, v1, h2, v2; finish_last_char(); /* GROFF uses Fd to set fill color for solid drawing objects to the default, so just ignore that. */ if (s[0] == 'F' && s[1] == 'd') return; gx = (float) h; gy = YCORR/unit - ((float) v); if (!graphics_used) prepare_graphics(); fprintf(mpxf,"D(%.4f) ", LWscale*cursize); switch (*s++) { case 'c': h1 = get_float(s); if (arg_tail==NULL) quit("Bad argument in ",s-2,""); do_ellipse(h1,h1); break; case 'e': h1 = get_float(s); v1 = get_float(arg_tail); if (arg_tail==NULL) quit("Bad argument in ",s-2,""); do_ellipse(h1,v1); break; case 'A': fprintf(mpxf, "reverse "); /* fall through */ case 'a': h1 = get_float(s); v1 = get_float(arg_tail); h2 = get_float(arg_tail); v2 = get_float(arg_tail); if (arg_tail==NULL) quit("Bad argument in ",s-2,""); do_arc(gx+h1, gy-v1, -h1, v1, h2, -v2); break; case 'l': case 'p': while (s!=NULL) s = do_line(s); fprintf(mpxf, ";\n"); break; case 'q': do s = spline_seg(s); while (s!=NULL); fprintf(mpxf, ";\n"); break; case '~': fprintf(mpxf, "(%.3f,%.3f)--", gx*unit, gy*unit); do s = spline_seg(s); while (s!=NULL); fprintf(mpxf, "--(%.3f,%.3f);\n", gx*unit, gy*unit); break; default: quit("Unknown drawing function",s-2,""); } h = (int) floor(gx+.5); v = (int) floor(YCORR/unit+.5-gy); } /************************************************************** Interpreting Troff Output ***************************************************************/ void change_font(int f) { for (curfont=0; curfont'9' || c[2]=='\0') quit("Bad nnc command in troff output","",""); h += 10*(c[0]-'0') + c[1]-'0'; c++; cc = c+2; goto set; case 'p': return 1; case 'n': (void) get_int(c+1); (void) get_int(arg_tail); goto iarg; case 'D': do_graphic(c+1); goto eoln; case 'x': if (!do_x_cmd(c+1)) return 0; goto eoln; case '#': goto eoln; case 'F': /* GROFF uses this command to report filename */ goto eoln; case 'm': /* GROFF uses this command to control color */ goto eoln; case 'u': /* GROFF uses this command to output a word with additional white space between characters, not implemented */ quit("Bad command in troff output\n", "change the DESC file for your GROFF PostScript device, ", "remove tcommand"); case 't': /* GROFF uses this command to output a word */ cc=c; do cc++; while (*cc!=' ' && *cc!='\t' && *cc!='\0'); a= *cc; *cc='\0'; set_string(++c); c = cc; *c = a; continue; default: quit("Bad command in troff output","",""); } continue; set:a= *cc; *cc='\0'; set_char(++c); c = cc; *c = a; continue; iarg:c = arg_tail; } eoln:/* do nothing */; } return 0; } /************************************************************** Main Program ***************************************************************/ void usage (char *name, int status) { FILE *f = status == 0 ? stdout : stderr; fputs ("Usage: dmp [OPTION]... DITROFFFILE [MPXFILE]\n\ Translate DITROFFFILE to the MetaPost MPXFILE or standard output.\n\ \n\ --help display this help and exit\n\ --version output version information and exit\n", f); putc ('\n', f); fputs ("Email bug reports to metapost@tug.org.\n", f); exit(status); } int main(int argc, char **argv) { int more; fsearch_init(); trf = stdin; mpxf = stdout; if (argc == 1) { fputs ("dmp: Need one or two file arguments.\n", stderr); fputs ("Try `dmp --help' for more information.\n", stderr); exit(1); } else if (argc > 1 && (strcmp (argv[1], "--help") == 0 || strcmp (argv[1], "-help") == 0)) { usage (argv[0], 0); } else if (argc > 1 && (strcmp (argv[1], "--version") == 0 || strcmp (argv[1], "-version") == 0)) { fputs (term_banner,stdout); fputs ("\nThis program is in the public domain.\n\ Primary author of dmp: John Hobby.\n", stdout); exit (0); } if (argc>3) usage(argv[0], 1); if (argc>1) { trf = fopen(argv[1], "r"); if (trf==(FILE*)0) { fprintf (stderr, "%s: ", argv[0]); perror (argv[1]); exit(1); } if (argc>2) { mpxf = fopen(argv[2], "w"); if (mpxf==(FILE*)0) { fprintf (stderr, "%s: ", argv[0]); perror (argv[2]); exit(1); } } } fprintf(mpxf, "%s\n", banner); read_desc(); read_fmap(dbname); if (!gflag) read_char_adj(adjname); if (do_page()) { do { h=0; v=0; Xslant = Xheight = 0.0; start_picture(); more = do_page(); stop_picture(); fprintf(mpxf,"mpxbreak\n"); } while (more); } exit(0); }