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/**
    Program: aftopl -- convert Adobe AFM files into TeX PL files
    Author: Clayton M. Elwell, Ohio State University

    Disclaimer: This program seems to work, but it was cobbled up in
        an afternoon.  Its operation should be readily apparent
        to any C programmer.
**/
static char RCSid[] = "$Header: aftopl.c,v 2.1 87/11/24 12:34:38 cudcv Exp $";
/*
 * $Log:    aftopl.c,v $
 * Revision 2.1  87/11/24  12:34:38  cudcv
 * Finished (?) - Release.
 *
 * Revision 1.3  87/10/30  09:41:26  cudcv
 * Don't want ligatures for typewriter fonts, even if they are in the
 * Postscript fonts.
 *
 * Revision 1.2  87/10/30  09:19:26  cudcv
 * Remap for TeX fonts, add LIGTABLE.  Fixed bug in slant.
 *
 * Revision 1.1  87/07/09  12:57:27  cudcv
 * Initial revision
 *
 */

#include <stdio.h>
#include <ctype.h>
#include <math.h>

#ifndef M_PI /* not in all math.h files */
#define M_PI	3.14159265358979323846
#endif

#define    max(a,b)    ((a) > (b) ? (a) : (b))

char line[BUFSIZ];

char *strupr(s)
register char *s;
{
    register char *s1;
    s1 = s;
    while (*s) {
    if (islower(*s)) *s = toupper(*s);
    s++;
    }
    return s1;
}

starts(s1, s2)
register char *s1;
register char *s2;
{
    return !strncmp(s1, s2, strlen(s2));
}

float hscale;

float scale(i)
int i;
{
    return (hscale * (((float) i) / 1000.0));
}

struct {
    int number;
    char *name;
    int forfw;
} map [] =
{
    { 0000, "Gamma", 1 },
    { 0001, "Delta", 1 },
    { 0002, "Theta", 1 },
    { 0003, "Lambda", 1 },
    { 0004, "Xi", 1 },
    { 0005, "Pi", 1 },
    { 0006, "Sigma", 1 },
    { 0007, "Upsilon", 1 },
    { 0010, "Phi", 1 },
    { 0011, "Psi", 1 },
    { 0012, "Omega", 1 },
    { 0013, "ff", 0 },
    { 0014, "fi", 0 },
    { 0015, "fl", 0 },
    { 0016, "ffi", 0 },
    { 0017, "ffl", 0 },
    { 0020, "dotlessi", 1 },
    { 0021, "dotlessj", 1 },
    { 0022, "grave", 1 },
    { 0023, "acute", 1 },
    { 0024, "caron", 1 },
    { 0025, "breve", 1 },
    { 0026, "macron", 1 },
    { 0027, "ring", 1 },
    { 0030, "cedilla", 1 },
    { 0031, "germandbls", 1 },
    { 0032, "ae", 1 },
    { 0033, "oe", 1 },
    { 0034, "oslash", 1 },
    { 0035, "AE", 1 },
    { 0036, "OE", 1 },
    { 0037, "Oslash", 1 },
    { 0136, "circumflex", 0 },
    { 0137, "dotaccent", 0 },
    { 0175, "hungarumlaut", 0 },
    { 0176, "tilde", 0 },
    { 0177, "dieresis", 1 },
};

int number, width, left, bottom, right, top;
char name[64];

main(argc, argv)
int argc;
char *argv[];
{
    double atof();
    int fixedwidth = 0, filigs = 0;

    if (argc == 2) hscale = atof(argv[1]); else hscale = 1.0;
    puts("(COMMENT THIS PL FILE WAS GENERATED FROM AN AFM FILE BY AFTOPL)");
    puts("(COMMENT AFTOPL WAS WRITTEN BY CLAYTON M. ELWELL, OHIO STATE UNIVERSITY)");
    puts("(DESIGNSIZE R 10.0)");
    puts("(SEVENBITSAFEFLAG FALSE)");
    while (gets(line)) {
    if (starts(line, "Comment"))
        printf("(COMMENT %s)\n", strupr(line+8));
    else if (starts(line, "EncodingScheme"))
        printf("(CODINGSCHEME %s)\n", strupr(line+15));
    else if (starts(line, "ItalicAngle")) {
        double d = -tan(atof(line+12) * M_PI / 180.0);
        printf("(FONTDIMEN\n  (SLANT R %.6f)\n", d);
        puts("  (STRETCH R 0.300)\n  (SHRINK R 0.100)\n  )");
    }
    else if (starts(line, "IsFixedPitch")) {
        if (line[13] == 't')
        fixedwidth++;
    }
    else if (starts(line, "CapHeight"))
        printf("(FONTDIMEN\n  (QUAD R %f)\n  )\n", scale(atoi(line+10)));
    else if (starts(line, "XHeight"))
        printf("(FONTDIMEN\n  (XHEIGHT R %f)\n  )\n", scale(atoi(line+8)));
    else if (starts(line, "C ")) {
        sscanf(line, "C %d ; WX %d ; N %s ; B %d %d %d %d ;",
        &number, &width, name, &left, &bottom, &right, &top);
        if (number < 32) {    /* do nothing */
        } else if (number == 32) {
        printf("(FONTDIMEN\n");
        printf("  (SPACE R %f)\n  (EXTRASPACE R %f)\n",
               scale(width),
               fixedwidth ? scale(width) : scale(width)/2);
        printf("  )\n");
        } else {
        int found = 0, i;
        for (i = 0; i < sizeof(map)/sizeof(map[0]); i++) {
            if (fixedwidth && !map[i].forfw)
            continue;
            if (!(strcmp(map[i].name, name)))
            OutChar(map[i].number, width, name,
                left, bottom, right, top);
            if (map[i].number == number)
            found++;
        }
        if (!found)
            OutChar(number, width, name, left, bottom, right, top);
        if (!strcmp(name, "fi"))
            filigs++;
        }
    } else if (starts(line, "StartKernPairs"))
        puts("(LIGTABLE");
    else if (starts(line, "EndKernPairs"))
        puts("  )");
    else if (starts(line, "KPX ")) {
        if ((line[5] != ' ') || (line[7] != ' ')) {
        } else {
        printf("  (LABEL C %c)\n", line[4]);
        while (starts(line, "KPX ")) {
            if ((line[5] == ' ') && (line[7] == ' ')) {
            sscanf(line, "KPX %c %c %d", name, name+1, &width);
            printf("  (KRN C %c R %f)\n", name[1], scale(width));
            }
            gets(line);
        }
        puts("  (STOP)");
        }
    }
    }
    printf(
"(LIGTABLE\n\
  (LABEL O 40)\n\
  (LIG C l O 370)\n\
  (LIG C L O 350)\n\
  (STOP)\n\
  (LABEL O 41)\n\
  (LIG O 140 O 241)\n\
  (STOP)\n\
  (LABEL O 77)\n\
  (LIG O 140 O 277)\n\
  (STOP)\n");
    if (!fixedwidth) {
    printf(
"  (LABEL O 140)\n\
  (LIG O 140 O 252)\n\
  (STOP)\n\
  (LABEL O 47)\n\
  (LIG O 47 O 272)\n\
  (STOP)\n\
  (LABEL O 55)\n\
  (LIG O 55 O 261)\n\
  (STOP)\n\
  (LABEL O 261)\n\
  (LIG O 55 O 320)\n\
  (STOP)\n");
    if (filigs) printf(
"  (LABEL C f)\n\
  (LIG C i O 256)\n\
  (LIG C l O 257)\n\
  (STOP)\n");
    }
    printf("  )");
}

OutChar(number, width, name, left, bottom, right, top)
    int number, width, left, bottom, right, top;
    char *name;
{
    printf("(COMMENT %s)\n(CHARACTER D %d\n", name, number);
    printf("  (CHARWD R %f)\n  (CHARHT R %f)\n",
       scale(width), scale(top));
    if (max(0, -bottom))
    printf("  (CHARDP R %f)\n", scale(-bottom));
    if (right > width)
    printf("  (CHARIC R %f)\n", scale(right - width));
    puts("  )");
}
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