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researchv10 Norman
/*
*
* Typesetter font tables routines - for postprocessors.
*
*/
#include <stdio.h>
#include <ctype.h>
#include "gen.h"
#include "ext.h"
#include "font.h"
Font *mount[MAXFONTS+1]; /* mount table - pointers into fonts[] */
Font fonts[MAXFONTS+2]; /* font data - guarantee one empty slot */
int fcount; /* entries in fonts[] */
int mcount; /* fonts currently in memory */
int mlimit = MAXFONTS+1; /* and the most we'll allow */
char *chnames[MAXCH]; /* special character hash table */
int nchnames; /* number of entries in chnames[] */
extern int devres;
extern int unitwidth;
extern int nfonts;
/*****************************************************************************/
checkdesc(path)
char *path;
{
char buf[150];
FILE *fp;
int val = 0;
/*
*
* Return non-zero if the typesetter description file path includes,
*
* PDL PostScript
*
* before the charset table.
*
*/
if ( (fp = fopen(path, "r")) != NULL ) {
while ( fscanf(fp, "%s", buf) != EOF ) {
if ( strcmp(buf, "PDL") == 0 ) {
fscanf(fp, "%s", buf);
val = strcmp(buf, "PostScript") == 0;
break;
} else if ( strcmp(buf, "charset") == 0 )
break;
skipline(fp);
} /* End while */
fclose(fp);
} /* End if */
return(val);
} /* End of checkdesc */
/*****************************************************************************/
getdesc(path)
char *path;
{
char buf[150];
FILE *fp;
int n;
/*
*
* Read a typesetter description file. Font and size lists are discarded. Only
* used to get to the start of the next command.
*
*/
if ( (fp = fopen(path, "r")) == NULL )
return(-1);
while ( fscanf(fp, "%s", buf) != EOF ) {
if ( strcmp(buf, "res") == 0 )
fscanf(fp, "%d", &devres);
else if ( strcmp(buf, "unitwidth") == 0 )
fscanf(fp, "%d", &unitwidth);
else if ( strcmp(buf, "sizes") == 0 )
while ( fscanf(fp, "%d", &n) != EOF && n != 0 ) ;
else if ( strcmp(buf, "inmemory") == 0 )
fscanf(fp, "%d", &mlimit);
else if ( strcmp(buf, "Encoding") == 0 ) {
fscanf(fp, "%s", buf);
fontencoding = strsave(buf);
} else if ( strcmp(buf, "fonts") == 0 ) {
fscanf(fp, "%d", &nfonts);
for ( n = 0; n < nfonts; n++ )
fscanf(fp, "%s", buf);
} else if ( strcmp(buf, "charset") == 0 ) {
while ( fscanf(fp, "%s", buf) != EOF )
chadd(buf);
break;
} /* End if */
skipline(fp);
} /* End while */
fclose(fp);
return(1);
} /* End of getdesc */
/*****************************************************************************/
getfont(path, fpos)
char *path;
Font *fpos;
{
FILE *fin;
Chwid chtemp[MAXCH];
static Chwid chinit;
int i, nw, n, wid, code;
char buf[300], ch[100], s1[100], s2[100], s3[100], cmd[100];
/*
*
* Read a width table from path into *fpos. Skip unnamed characters, spacewidth,
* ligatures, ascender/descender entries, and anything else not recognized. All
* calls should come through mountfont().
*
*/
if ( fpos->state == INMEMORY )
return(1);
if ( (fin = fopen(path, "r")) == NULL )
return(-1);
if ( fpos->state == NEWFONT ) {
if ( ++fcount > MAXFONTS+1 )
return(-1);
fpos->path = strsave(path);
} /* End if */
if ( ++mcount > mlimit && mcount > nfonts+1 )
freefonts();
for ( i = 0; i < ALPHABET-32; i++ )
chtemp[i] = chinit;
while ( fscanf(fin, "%s", cmd) != EOF ) {
if ( strcmp(cmd, "name") == 0 ) {
release(fpos->name);
fscanf(fin, "%s", buf);
fpos->name = strsave(buf);
} else if ( strcmp(cmd, "fontname") == 0 ) {
release(fpos->fontname);
fscanf(fin, "%s", buf);
fpos->fontname = strsave(buf);
} else if ( strcmp(cmd, "special") == 0 )
fpos->specfont = 1;
else if ( strcmp(cmd, "named") == 0 ) /* in prologue or somewhere else */
fpos->flags |= NAMED;
else if ( strcmp(cmd, "charset") == 0 ) {
skipline(fin);
nw = ALPHABET-32;
while ( fgets(buf, sizeof(buf), fin) != NULL ) {
sscanf(buf, "%s %s %s %s", ch, s1, s2, s3);
if ( s1[0] != '"' ) { /* not a synonym */
sscanf(s1, "%d", &wid);
code = strtol(s3, 0, 0); /* dec/oct/hex */
} /* End if */
if ( strlen(ch) == 1 ) { /* it's ascii */
n = ch[0] - 32; /* origin omits non-graphics */
chtemp[n].num = ch[0];
chtemp[n].wid = wid;
chtemp[n].code = code;
} else if ( ch[0] == '\\' && ch[1] == '0' ) {
n = strtol(ch+1, 0, 0) - 32; /* check against ALPHABET? */
chtemp[n].num = n + 32;
chtemp[n].wid = wid;
chtemp[n].code = code;
} else if ( strcmp(ch, "---") != 0 ) { /* ignore unnamed chars */
if ( (n = chindex(ch)) == -1 ) /* global? */
n = chadd(ch);
chtemp[nw].num = n;
chtemp[nw].wid = wid;
chtemp[nw].code = code;
nw++;
} /* End else */
} /* End while */
break;
} /* End else */
skipline(fin);
} /* End while */
fclose(fin);
fpos->wp = (Chwid *)allocate(nw * sizeof(Chwid));
for ( i = 0; i < nw; i++ )
fpos->wp[i] = chtemp[i];
fpos->nchars = nw;
fpos->state = INMEMORY;
return(1);
} /* End of getfont */
/*****************************************************************************/
mountfont(path, m)
char *path;
int m;
{
Font *fpos;
/*
*
* Mount font table from file path at position m. Mounted fonts are guaranteed
* to be in memory.
*
*/
if ( m < 0 || m > MAXFONTS )
return(-1);
if ( mount[m] != NULL ) {
if ( mount[m]->path != NULL && strcmp(path, mount[m]->path) == 0 ) {
if ( mount[m]->state == INMEMORY )
return(1);
} else {
mount[m]->mounted--;
mount[m] = NULL;
} /* End else */
} /* End if */
mount[m] = fpos = &fonts[findfont(path)];
mount[m]->mounted++;
return(getfont(path, fpos));
} /* End of mountfont */
/*****************************************************************************/
freefonts()
{
int n;
/*
*
* Release memory used by all unmounted fonts - except for the path string.
*
*/
for ( n = 0; n < MAXFONTS+2; n++ )
if ( fonts[n].state == INMEMORY && fonts[n].mounted == 0 ) {
release(fonts[n].wp);
fonts[n].wp = NULL;
fonts[n].state = RELEASED;
mcount--;
} /* End if */
} /* End of freefonts */
/*****************************************************************************/
findfont(path)
char *path;
{
register n;
/*
*
* Look for path in the fonts table. Returns the index where it was found or can
* be inserted (if not found).
*
*/
for ( n = hash(path, MAXFONTS+2); fonts[n].state != NEWFONT; n = (n+1) % (MAXFONTS+2) )
if ( strcmp(path, fonts[n].path) == 0 )
break;
return(n);
} /* End of findfont */
/*****************************************************************************/
mounted(m)
int m;
{
/*
*
* Return 1 if a font is mounted at position m.
*
*/
return((m >= 0 && m <= MAXFONTS && mount[m] != NULL) ? 1 : 0);
} /* End of mounted */
/*****************************************************************************/
onfont(c, m)
int c;
int m;
{
register Font *fp;
register Chwid *cp, *ep;
/*
*
* Returns the position of character c in the font mounted at m, or -1 if the
* character is not found.
*
*/
if ( mounted(m) ) {
fp = mount[m];
if ( c < ALPHABET ) {
if ( fp->wp[c-32].num == c ) /* ascii at front */
return c - 32;
else return -1;
} /* End if */
cp = &fp->wp[ALPHABET-32];
ep = &fp->wp[fp->nchars];
for ( ; cp < ep; cp++ ) /* search others */
if ( cp->num == c )
return cp - &fp->wp[0];
} /* End if */
return -1;
} /* End of onfont */
/*****************************************************************************/
chwidth(n, m)
int n;
int m;
{
/*
*
* Return width of the character at position n in the font mounted at m. Skip
* bounds checks - assume it's already been done.
*
*/
return(mount[m]->wp[n].wid);
} /* End of chwidth */
/*****************************************************************************/
chcode(n, m)
int n;
int m;
{
/*
*
* Return typesetter code for the character at position n in the font mounted
* at m. Skip bounds checks - assume it's already been done.
*
*/
return(mount[m]->wp[n].code);
} /* End of chcode */
/*****************************************************************************/
chindex(s)
char *s;
{
register i;
/*
*
* Look for s in global character name table. Hash table is guaranteed to have
* at least one empty slot (by chadd()) so the loop terminate.
*
*/
for ( i = hash(s, MAXCH); chnames[i] != NULL; i = (i+1) % MAXCH )
if ( strcmp(s, chnames[i]) == 0 )
return(i+ALPHABET);
return(-1);
} /* End of chindex */
/*****************************************************************************/
chadd(s)
char *s;
{
register i;
/*
*
* Add s to the global character name table. Leave one empty slot so loops
* terminate.
*
*/
if ( nchnames >= MAXCH - 1 )
error(FATAL, "out of table space adding character %s", s);
for ( i = hash(s, MAXCH); chnames[i] != NULL; i = (i+1) % MAXCH ) ;
nchnames++;
chnames[i] = strsave(s);
return(i+ALPHABET);
} /* End of chadd */
/*****************************************************************************/
char *chname(n)
int n;
{
/*
*
* Returns string for the character with index n.
*
*/
return(chnames[n-ALPHABET]);
} /* End of chname */
/*****************************************************************************/
hash(s, l)
char *s;
int l;
{
register i;
/*
*
* Return the hash index for string s in a table of length l. Probably should
* make i unsigned and mod once at the end.
*
*/
for ( i = 0; *s != '\0'; s++ )
i = (i * 10 + *s) % l;
return(i);
} /* End of hash */
/*****************************************************************************/
char *strsave(s)
char *s;
{
char *ptr = NULL;
/*
*
* Make a permanent copy of string s.
*
*/
if ( s != NULL ) {
ptr = (char *)allocate(strlen(s)+1);
strcpy(ptr, s);
} /* End if */
return(ptr);
} /* End of strsave */
/*****************************************************************************/
char *allocate(count)
int count;
{
char *ptr;
/*
*
* Allocates count bytes. Free unmounted fonts if the first attempt fails. To
* be absolutely correct all memory allocation should be done by this routine.
*
*/
if ( (ptr = (char *)malloc(count)) == NULL ) {
freefonts();
if ( (ptr = (char *)malloc(count)) == NULL )
error(FATAL, "no memory");
} /* End if */
return(ptr);
} /* End of allocate */
/*****************************************************************************/
release(ptr)
char *ptr;
{
/*
*
* Free memory provided ptr isn't NULL.
*
*/
if ( ptr != NULL )
free(ptr);
} /* End of release */
/*****************************************************************************/
dumpmount(m)
int m;
{
/*
*
* Dumps the font mounted at position n.
*
*/
if ( mount[m] != NULL )
dumpfont((mount[m] - &fonts[0]));
else fprintf(stderr, "no font mounted at %d\n", m);
} /* End of dumpmount */
/*****************************************************************************/
dumpfont(n)
int n;
{
int i;
Font *fpos;
char *str;
/*
*
* Dump of everything known about the font saved at fonts[n].
*
*/
fpos = &fonts[n];
if ( fpos->state ) {
fprintf(stderr, "path %s\n", fpos->path);
fprintf(stderr, "state %d\n", fpos->state);
fprintf(stderr, "flags %d\n", fpos->flags);
fprintf(stderr, "mounted %d\n", fpos->mounted);
fprintf(stderr, "nchars %d\n", fpos->nchars);
fprintf(stderr, "special %d\n", fpos->specfont);
fprintf(stderr, "name %s\n", fpos->name);
fprintf(stderr, "fontname %s\n", fpos->fontname);
if ( fpos->state == INMEMORY ) {
fprintf(stderr, "charset\n");
for ( i = 0; i < fpos->nchars; i++ ) {
if ( fpos->wp[i].num > 0 ) {
if ( fpos->wp[i].num < ALPHABET )
fprintf(stderr, "%c\t%d\t%d\n", fpos->wp[i].num,
fpos->wp[i].wid, fpos->wp[i].code);
else {
str = chname(fpos->wp[i].num);
if ( *str == '#' && isdigit(*(str+1)) && isdigit(*(str+2)) )
str = "---";
fprintf(stderr, "%s\t%d\t%d\n", str, fpos->wp[i].wid,
fpos->wp[i].code);
} /* End else */
} /* End if */
} /* End for */
} else fprintf(stderr, "charset: not in memory\n");
} else fprintf(stderr, "empty font: %d\n", n);
putc('\n', stderr);
} /* End of dumpfont */
/*****************************************************************************/
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