ref: 928b07b62c2ba00e09855a83cf61bce20fc5d3f7
dir: /out.c/
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "xroff.h"
static int out_nl = 1;
/* output troff code; newlines may appear only at the end of s */
static void out_out(char *s, va_list ap)
{
out_nl = strchr(s, '\n') != NULL;
vfprintf(stdout, s, ap);
}
/* output troff code; no preceding newline is necessary */
static void outnn(char *s, ...)
{
va_list ap;
va_start(ap, s);
out_out(s, ap);
va_end(ap);
}
/* output troff cmd; should appear after a newline */
void out(char *s, ...)
{
va_list ap;
if (!out_nl)
outnn("\n");
va_start(ap, s);
out_out(s, ap);
va_end(ap);
}
int utf8len(int c)
{
if (c <= 0x7f)
return 1;
if (c >= 0xfc)
return 6;
if (c >= 0xf8)
return 5;
if (c >= 0xf0)
return 4;
if (c >= 0xe0)
return 3;
if (c >= 0xc0)
return 2;
return 1;
}
static char *utf8get(char *d, char *s)
{
int l = utf8len((unsigned char) *s);
int i;
for (i = 0; i < l; i++)
d[i] = s[i];
d[l] = '\0';
return s + l;
}
static int o_s = 10;
static int o_f = 1;
static void out_ps(int n)
{
if (o_s != n) {
o_s = n;
out("s%d\n", o_s);
}
}
static void out_ft(int n)
{
if (n >= 0 && o_f != n) {
o_f = n;
out("f%d\n", o_f);
}
}
static char *escarg(char *s, char *d, int cmd)
{
int q;
if (strchr(ESC_P, cmd)) {
if (cmd == 's' && (*s == '-' || *s == '+'))
*d++ = *s++;
if (*s == '(') {
s++;
*d++ = *s++;
*d++ = *s++;
} else {
*d++ = *s++;
if (cmd == 's' && s[-1] >= '1' && s[-1] <= '3')
if (isdigit(*s))
*d++ = *s++;
}
}
if (strchr(ESC_Q, cmd)) {
q = *s++;
while (*s && *s != q)
*d++ = *s++;
if (*s == q)
s++;
}
if (cmd == 'z')
*d++ = *s++;
*d = '\0';
return s;
}
static char *tok_str(char *d, char *s)
{
while (isspace(*s))
s++;
while (*s && !isspace(*s))
*d++ = *s++;
*d = '\0';
return s;
}
static char *tok_num(int *d, char *s, char **cc, int scale)
{
char tok[ILNLEN];
s = tok_str(tok, s);
*d = eval(tok, 0, scale);
if (*cc)
*cc += sprintf(*cc, " %du", *d);
else
outnn(" %d", *d);
return s;
}
/* parse \D arguments and copy them into cc; return the width */
int out_draw(char *s, char *cc)
{
int h1, h2, v1, v2;
int hd = 0, vd = 0;
int c = *s++;
if (cc)
*cc++ = c;
else
out("D%c", c);
switch (c) {
case 'l':
s = tok_num(&h1, s, &cc, 'm');
s = tok_num(&v1, s, &cc, 'v');
if (!cc) /* dpost requires this */
outnn(" .");
hd = h1;
vd = v1;
break;
case 'c':
s = tok_num(&h1, s, &cc, 'm');
hd = h1;
vd = 0;
break;
case 'e':
s = tok_num(&h1, s, &cc, 'm');
s = tok_num(&v1, s, &cc, 'v');
hd = h1;
vd = 0;
break;
case 'a':
s = tok_num(&h1, s, &cc, 'm');
s = tok_num(&v1, s, &cc, 'v');
s = tok_num(&h2, s, &cc, 'm');
s = tok_num(&v2, s, &cc, 'v');
hd = h1 + h2;
vd = v1 + v2;
break;
default:
s = tok_num(&h1, s, &cc, 'm');
s = tok_num(&v1, s, &cc, 'v');
hd = h1;
vd = v1;
while (*s) {
s = tok_num(&h2, s, &cc, 'm');
s = tok_num(&v2, s, &cc, 'v');
hd += h2;
vd += v2;
}
break;
}
if (cc)
*cc = '\0';
else
outnn("\n");
return hd;
}
void out_line(char *s)
{
struct glyph *g;
char c[GNLEN * 4];
char arg[ILNLEN];
while (*s) {
s = utf8get(c, s);
if (c[0] == '\\') {
s = utf8get(c + 1, s);
if (c[1] == '(') {
s = utf8get(c + 2, s);
s = utf8get(c + strlen(c), s);
} else if (c[1] == '\\') {
c[1] = '\0';
} else if (strchr("DfhsvX", c[1])) {
s = escarg(s, arg, c[1]);
if (c[1] == 'D') {
out_draw(arg, NULL);
continue;
}
if (c[1] == 'f') {
out_ft(dev_font(arg));
continue;
}
if (c[1] == 'h') {
outnn("h%d", eval(arg, 0, 'm'));
continue;
}
if (c[1] == 's') {
out_ps(eval(arg, o_s, '\0'));
continue;
}
if (c[1] == 'v') {
outnn("v%d", eval(arg, 0, 'v'));
continue;
}
if (c[1] == 'X') {
out("x X %s\n", arg);
continue;
}
}
}
g = dev_glyph(c, o_f);
if (g) {
if (utf8len(c[0]) == strlen(c))
outnn("c%s%s", c, c[1] ? "\n" : "");
else
out("C%s\n", c[0] == '\\' && c[1] == '(' ? c + 2 : c);
}
outnn("h%d", charwid(g ? g->wid : dev_spacewid(), o_s));
}
}