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/*
* This file is part of abc2ps,
* Copyright (C) 1996,1997,1998 Michael Methfessel
* See file abc2ps.c for details.
*/
/* subroutines to handle output buffer */
/* PUTn: add to buffer with n arguments */
#define PUT0(f) {sprintf(mbf,f); a2b(mbf); }
#define PUT1(f,a) {sprintf(mbf,f,a); a2b(mbf); }
#define PUT2(f,a,b) {sprintf(mbf,f,a,b); a2b(mbf); }
#define PUT3(f,a,b,c) {sprintf(mbf,f,a,b,c); a2b(mbf); }
#define PUT4(f,a,b,c,d) {sprintf(mbf,f,a,b,c,d); a2b(mbf); }
#define PUT5(f,a,b,c,d,e) {sprintf(mbf,f,a,b,c,d,e); a2b(mbf); }
/* ----- a2b: appends string to output buffer ----- */
void a2b (t)
char *t;
{
int l,i;
l=strlen(t);
/* printf ("Append %d <%s>\n", l, t); */
if (nbuf+l>BUFFSZ) {
printf("+++ a2b: buffer full, BUFFSZ=%d\n", BUFFSZ);
exit (1);
}
for (i=0;i<l;i++) buf[nbuf+i]=t[i];
nbuf += l;
}
/* ----- bskip(h): translate down by h points in output buffer ---- */
void bskip(h)
float h;
{
if (h*h>0.0001) {
PUT1("0 %.2f T\n", -h)
bposy=bposy-h;
}
}
/* ----- init_pdims: initialize page dimensions ----- */
void init_pdims ()
{
if (in_page) return;
posx=cfmt.leftmargin;
posy=cfmt.pageheight-cfmt.topmargin;
}
/* ----- clear_buffer ------- */
void clear_buffer ()
{
nbuf = 0;
bposy = 0.0;
ln_num = 0;
}
/* ----- write_index_entry ------- */
void write_index_entry ()
{
char s[801];
float w,dx1,dx2;
if (!index_initialized) init_index_file ();
if (vb>=8) printf("Write index entry: %5d <%s>\n",
pagenum, info.title);
/* spacing determined here */
index_posy = index_posy-1.2*cfmt.indexfont.size;
if (index_posy-cfmt.indexfont.size < cfmt.botmargin) {
close_index_page (findex);
init_index_page (findex);
}
dx1 = 1.8*cfmt.indexfont.size;
dx2 = dx1+cfmt.indexfont.size;
tex_str (info.title,s,&w);
if (strlen(s)==0) strcpy (s, "No title");
fprintf (findex, "%.2f %.2f M (%d) lshow\n",
index_posx+dx1, index_posy, pagenum);
fprintf (findex, "%.2f %.2f M (%s) S\n",
index_posx+dx2, index_posy, s);
if (strlen(info.rhyth) || strlen(info.orig)) {
fprintf (findex, "( (");
if (strlen(info.rhyth)) fprintf (findex, "%s", info.rhyth);
if (strlen(info.rhyth) && strlen(info.orig))
fprintf (findex, ", ");
if (strlen(info.orig)) fprintf (findex, "%s", info.orig);
fprintf (findex, ")) S\n");
}
if (strlen(info.comp)) fprintf (findex, "( - %s) S\n", info.comp);
if (cfmt.withxrefs) fprintf (findex, "( [%s]) S\n", info.xref);
}
/* ----- write_buffer: write buffer contents, break at full pages ---- */
void write_buffer (fp)
FILE *fp;
{
int i,l,b1,b2,nb;
float p1,dp;
if (nbuf==0) return;
writenum++;
if ((writenum==1) && make_index) write_index_entry();
nb=0;
for (l=0;l<ln_num;l++) {
b1=0;
p1=0;
if (l>0) {
b1=ln_buf[l-1];
p1=ln_pos[l-1];
}
b2=ln_buf[l];
dp=ln_pos[l]-p1;
if ((posy+dp<cfmt.botmargin) && (!epsf)) {
write_pagebreak (fp);
}
for (i=b1;i<b2;i++) putc(buf[i],fp);
posy=posy+dp;
nb=ln_buf[l];
}
if (nb<nbuf) {
for (i=nb;i<nbuf;i++) putc(buf[i],fp);
}
clear_buffer();
return;
}
/* ----- buffer_eob: handle completed block in buffer ------- */
/* if the added stuff does not fit on current page, write it out
after page break and change buffer handling mode to pass though */
void buffer_eob (fp)
FILE *fp;
{
int do_break;
if (ln_num>=BUFFLN)
rx("max number off buffer lines exceeded"," -- check BUFFLN");
ln_buf[ln_num]=nbuf;
ln_pos[ln_num]=bposy;
ln_num++;
if (!use_buffer) {
write_buffer (fp);
return;
}
do_break=0;
if (posy+bposy<cfmt.botmargin) do_break=1;
if (cfmt.oneperpage) do_break=1;
if (do_break && (!epsf)) {
if (tunenum != 1 ) write_pagebreak (fp);
write_buffer (fp);
use_buffer=0;
}
return;
}
/* ----- check_buffer: dump buffer if less than nb bytes avilable --- */
void check_buffer (fp, nb)
FILE *fp;
int nb;
{
char mm[81];
if (nbuf+nb>BUFFSZ) {
sprintf (mm, "BUFFSZ exceeded at line %d", ln_num);
wng("possibly bad page breaks, ", mm);
write_buffer (fp);
use_buffer=0;
}
}
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