ref: c283bc1914975d2aef33f727066821535ee56ba7
dir: /post.c/
/*
* NEATPOST: NEATROFF'S POSTSCRIPT/PDF POSTPROCESSOR
*
* Copyright (C) 2013-2020 Ali Gholami Rudi <ali at rudi dot ir>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <u.h>
#include <libc.h>
#include <ctype.h>
#include <stdio.h>
#include "post.h"
static char *ps_title; /* document title */
static int ps_pagewidth = 2159; /* page width (tenths of a millimetre) */
static int ps_pageheight = 2794;/* page height (tenths of a millimetre) */
static int ps_linewidth = 40; /* drawing line thickness in thousandths of an em */
static int o_pages; /* output pages */
/* bookmarks */
static char (*mark_desc)[256]; /* bookmark description */
static int *mark_page; /* bookmark page */
static int *mark_offset; /* bookmark offset */
static int *mark_level; /* bookmark level */
static int mark_n; /* number of bookmarks */
static int mark_sz; /* allocated size of bookmark arrays */
/* named destinations */
static char (*name_desc)[64]; /* reference name */
static int *name_page; /* reference page */
static int *name_offset; /* reference offset */
static int name_n; /* number of references */
static int name_sz; /* allocated size of name arrays */
static int next(void)
{
return getc(stdin);
}
static void back(int c)
{
ungetc(c, stdin);
}
static int utf8len(int c)
{
if (~c & 0xc0) /* ASCII or invalid */
return c > 0;
if (~c & 0x20)
return 2;
if (~c & 0x10)
return 3;
if (~c & 0x08)
return 4;
return 1;
}
static int nextutf8(char *s)
{
int c = next();
int l = utf8len(c);
int i;
if (c < 0)
return 0;
s[0] = c;
for (i = 1; i < l; i++)
s[i] = next();
s[l] = '\0';
return l;
}
/* skip blanks */
static void nextskip(void)
{
int c;
do {
c = next();
} while (isspace(c));
back(c);
}
static int nextnum(void)
{
int c;
int n = 0;
int neg = 0;
nextskip();
while (1) {
c = next();
if (!n && (c == '-' || c == '+')) {
neg = c == '-';
continue;
}
if (!isdigit(c))
back(c);
if (c < 0 || !isdigit(c))
break;
n = n * 10 + c - '0';
}
return neg ? -n : n;
}
static int readnum(int *n)
{
int c;
do {
c = next();
} while (c == ' ');
back(c);
if (c == '-' || c == '+' || (c >= '0' && c <= '9')) {
*n = nextnum();
return 0;
}
return 1;
}
static int iseol(void)
{
int c;
do {
c = next();
} while (c == ' ');
back(c);
return c == '\n';
}
/* skip until the end of line */
static void nexteol(void)
{
int c;
do {
c = next();
} while (c >= 0 && c != '\n');
}
static void nextword(char *s)
{
int c;
nextskip();
c = next();
while (c >= 0 && !isspace(c)) {
*s++ = c;
c = next();
}
if (c >= 0)
back(c);
*s = '\0';
}
/* read until eol */
static void readln(char *s)
{
int c;
c = next();
while (c > 0 && c != '\n') {
*s++ = c;
c = next();
}
if (c == '\n')
back(c);
*s = '\0';
}
static void postline(void)
{
int h, v;
while (!readnum(&h) && !readnum(&v))
drawl(h, v);
}
static void postarc(void)
{
int h1, v1, h2, v2;
if (!readnum(&h1) && !readnum(&v1) && !readnum(&h2) && !readnum(&v2))
drawa(h1, v1, h2, v2);
}
static void postspline(void)
{
int h2, v2;
int h1 = nextnum();
int v1 = nextnum();
if (iseol()) {
drawl(h1, v1);
return;
}
while (!readnum(&h2) && !readnum(&v2)) {
draws(h1, v1, h2, v2);
h1 = h2;
v1 = v2;
}
draws(h1, v1, 0, 0);
}
static void postpoly(void)
{
int l = 'l';
int c;
while (!iseol() && (l == 'l' || l == '~' || l == 'a')) {
do {
c = next();
} while (c == ' ');
back(c);
if (c != '-' && c != '+' && (c < '0' || c > '9')) {
l = c;
while (c >= 0 && !isspace(c))
c = next();
continue;
}
if (l == 'l')
postline();
if (l == '~')
postspline();
if (l == 'a')
postarc();
}
}
static void postdraw(void)
{
int h1, v1;
int c = next();
drawbeg();
switch (tolower(c)) {
case 'l':
h1 = nextnum();
v1 = nextnum();
drawl(h1, v1);
break;
case 'c':
drawc(nextnum());
break;
case 'e':
h1 = nextnum();
v1 = nextnum();
drawe(h1, v1);
break;
case 'a':
postarc();
break;
case '~':
postspline();
break;
case 'p':
postpoly();
break;
}
drawend(c == 'p' || c == 'P', c == 'E' || c == 'C' || c == 'P');
nexteol();
}
static char *strcut(char *dst, char *src)
{
while (*src == ' ' || *src == '\n')
src++;
if (src[0] == '"') {
src++;
while (*src && (src[0] != '"' || src[1] == '"')) {
if (*src == '"')
src++;
*dst++ = *src++;
}
if (*src == '"')
src++;
} else {
while (*src && *src != ' ' && *src != '\n')
*dst++ = *src++;
}
*dst = '\0';
return src;
}
static void postps(void)
{
char cmd[ILNLEN];
char arg[ILNLEN];
nextword(cmd);
readln(arg);
if (!strcmp("PS", cmd) || !strcmp("ps", cmd))
out("%s\n", arg);
if (!strcmp("rotate", cmd))
outrotate(atoi(arg));
if (!strcmp("eps", cmd) || !strcmp("pdf", cmd)) {
char path[1 << 12];
int hwid, vwid, nspec;
char *spec = arg;
spec = strcut(path, spec);
nspec = sscanf(spec, "%d %d", &hwid, &vwid);
if (nspec < 1)
hwid = 0;
if (nspec < 2)
vwid = 0;
if (path[0] && !strcmp("eps", cmd))
outeps(path, hwid, vwid);
if (path[0] && !strcmp("pdf", cmd))
outpdf(path, hwid, vwid);
}
if (!strcmp("name", cmd)) {
char *spec = arg;
int nspec;
if (name_n == name_sz) {
name_sz = name_sz == 0 ? 128 : name_sz * 2;
name_desc = mextend(name_desc, name_n, name_sz, sizeof(name_desc[0]));
name_page = mextend(name_page, name_n, name_sz, sizeof(name_page[0]));
name_offset = mextend(name_offset, name_n, name_sz, sizeof(name_offset[0]));
}
spec = strcut(name_desc[name_n], spec);
nspec = sscanf(spec, "%d %d", &name_page[name_n], &name_offset[name_n]);
if (name_desc[name_n][0] && nspec > 0)
name_n++;
}
if (!strcmp("mark", cmd)) {
char *spec = arg;
int nspec;
if (mark_n == mark_sz) {
mark_sz = mark_sz == 0 ? 128 : mark_sz * 2;
mark_desc = mextend(mark_desc, mark_n, mark_sz, sizeof(mark_desc[0]));
mark_page = mextend(mark_page, mark_n, mark_sz, sizeof(mark_page[0]));
mark_offset = mextend(mark_offset, mark_n, mark_sz, sizeof(mark_offset[0]));
mark_level = mextend(mark_level, mark_n, mark_sz, sizeof(mark_level[0]));
}
spec = strcut(mark_desc[mark_n], spec);
nspec = sscanf(spec, "%d %d %d", &mark_page[mark_n],
&mark_offset[mark_n], &mark_level[mark_n]);
if (mark_desc[mark_n][0] && nspec > 0)
mark_n++;
}
if (!strcmp("link", cmd)) {
char link[1 << 12];
int hwid, vwid, nspec;
char *spec = arg;
spec = strcut(link, spec);
nspec = sscanf(spec, "%d %d", &hwid, &vwid);
if (link[0] && nspec == 2)
outlink(link, hwid, vwid);
}
if (!strcmp("info", cmd)) {
char *spec = arg;
char kwd[128];
int i = 0;
while (*spec == ' ')
spec++;
while (*spec && *spec != ' ') {
if (i < sizeof(kwd) - 1)
kwd[i++] = *spec;
spec++;
}
kwd[i] = '\0';
while (*spec == ' ')
spec++;
outinfo(kwd, spec);
}
if (!strcmp("set", cmd)) {
char var[128];
char val[128];
if (sscanf(arg, "%128s %128s", var, val) == 2)
outset(var, val);
}
if (!strcmp("BeginObject", cmd))
drawmbeg(arg);
if (!strcmp("EndObject", cmd))
drawmend(arg);
}
static char postdir[PATHLEN] = TROFFFDIR; /* output device directory */
static char postdev[PATHLEN] = "utf"; /* output device name */
static void postx(void)
{
char cmd[128];
char font[128];
int pos;
nextword(cmd);
switch (cmd[0]) {
case 'f':
pos = nextnum();
nextword(font);
dev_mnt(pos, font, font);
outmnt(pos);
break;
case 'i':
if (dev_open(postdir, postdev)) {
fprintf(stderr, "neatpost: cannot open device %s\n", postdev);
exits(postdev);
}
docheader(ps_title, ps_pagewidth, ps_pageheight, ps_linewidth);
break;
case 'T':
nextword(postdev);
break;
case 's':
break;
case 'X':
postps();
break;
}
nexteol();
}
static void postcmd(int c)
{
char cs[GNLEN];
if (isdigit(c)) {
outrel((c - '0') * 10 + next() - '0', 0);
nextutf8(cs);
outc(cs);
return;
}
switch (c) {
case 's':
outsize(nextnum());
break;
case 'f':
outfont(nextnum());
break;
case 'H':
outh(nextnum());
break;
case 'V':
outv(nextnum());
break;
case 'h':
outrel(nextnum(), 0);
break;
case 'v':
outrel(0, nextnum());
break;
case 'c':
nextutf8(cs);
outc(cs);
break;
case 'm':
nextword(cs);
outcolor(clr_get(cs));
break;
case 'N':
nextnum();
break;
case 'C':
nextword(cs);
outc(cs);
break;
case 'p':
if (o_pages)
docpageend(o_pages);
o_pages = nextnum();
docpagebeg(o_pages);
outpage();
break;
case 'w':
break;
case 'n':
nextnum();
nextnum();
break;
case 'D':
postdraw();
break;
case 'x':
postx();
break;
case '#':
nexteol();
break;
default:
fprintf(stderr, "neatpost: unknown command %c\n", c);
nexteol();
}
}
static void post(void)
{
int c;
while ((c = next()) >= 0)
if (!isspace(c))
postcmd(c);
if (o_pages)
docpageend(o_pages);
if (name_n)
outname(name_n, name_desc, name_page, name_offset);
if (mark_n)
outmark(mark_n, mark_desc, mark_page, mark_offset, mark_level);
}
static struct paper {
char *name;
int w, h;
} papers[] = {
{"letter", 2159, 2794},
{"legal", 2159, 3556},
{"ledger", 4318, 2794},
{"tabloid", 2794, 4318},
};
static void setpagesize(char *s)
{
int d1, d2, n, i;
/* predefined paper sizes */
for (i = 0; i < LEN(papers); i++) {
if (!strcmp(papers[i].name, s)) {
ps_pagewidth = papers[i].w;
ps_pageheight = papers[i].h;
return;
}
}
/* custom paper size in tenth of mm; example: 2100x2970 for a4 */
if (isdigit(s[0]) && strchr(s, 'x')) {
ps_pagewidth = atoi(s);
ps_pageheight = atoi(strchr(s, 'x') + 1);
return;
}
/* ISO paper sizes */
if (!strchr("abcABC", s[0]) || !isdigit(s[1]))
return;
if (tolower(s[0]) == 'a') {
d1 = 8410;
d2 = 11890;
}
if (tolower(s[0]) == 'b') {
d1 = 10000;
d2 = 14140;
}
if (tolower(s[0]) == 'c') {
d1 = 9170;
d2 = 12970;
}
n = s[1] - '0';
ps_pagewidth = ((n & 1) ? d2 : d1) >> ((n + 1) >> 1);
ps_pageheight = ((n & 1) ? d1 : d2) >> (n >> 1);
ps_pagewidth -= ps_pagewidth % 10;
ps_pageheight -= ps_pageheight % 10;
}
void *mextend(void *old, long oldsz, long newsz, int memsz)
{
uchar *new = malloc(newsz * memsz);
memcpy(new, old, oldsz * memsz);
memset(new + oldsz * memsz, 0, (newsz - oldsz) * memsz);
free(old);
return new;
}
/* the unicode codepoint of the given utf-8 character */
static int utf8code(char *s)
{
int c = (unsigned char) s[0];
if (~c & 0xc0) /* ASCII or invalid */
return c;
if (~c & 0x20)
return ((c & 0x1f) << 6) | (s[1] & 0x3f);
if (~c & 0x10)
return ((c & 0x0f) << 12) | ((s[1] & 0x3f) << 6) | (s[2] & 0x3f);
if (~c & 0x08)
return ((c & 0x07) << 18) | ((s[1] & 0x3f) << 12) | ((s[2] & 0x3f) << 6) | (s[3] & 0x3f);
return c;
}
static int pdftext_ascii(char *s)
{
for (; *s; s++)
if (((unsigned char) *s) & 0x80 || *s == '(' || *s == ')')
return 0;
return 1;
}
/* encode s as pdf text string */
static char *pdftext(char *s)
{
struct sbuf *sb = sbuf_make();
if (pdftext_ascii(s)) {
sbuf_chr(sb, '(');
sbuf_str(sb, s);
sbuf_chr(sb, ')');
return sbuf_done(sb);
}
/* read utf-8 and write utf-16 */
sbuf_str(sb, "<FEFF"); /* unicode byte order marker */
while (*s) {
int c = utf8code(s);
if ((c >= 0 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) {
sbuf_printf(sb, "%02X%02X", c >> 8, c & 0xff);
}
if (c >= 0x010000 && c <= 0x10ffff) {
int c1 = 0xd800 + ((c - 0x10000) >> 10);
int c2 = 0xdc00 + ((c - 0x10000) & 0x3ff);
sbuf_printf(sb, "%02X%02X", c1 >> 8, c1 & 0xff);
sbuf_printf(sb, "%02X%02X", c2 >> 8, c2 & 0xff);
}
s += utf8len((unsigned char) *s);
}
sbuf_chr(sb, '>');
return sbuf_done(sb);
}
/* encode s as pdf text string; returns a static buffer */
char *pdftext_static(char *s)
{
static char buf[1024];
char *r = pdftext(s);
snprintf(buf, sizeof(buf), "%s", r);
free(r);
return buf;
}
static char *usage =
"Usage: neatpost [options] <input >output\n"
"Options:\n"
" -F dir \tset font directory (" TROFFFDIR ")\n"
" -p size \tset paper size (letter); e.g., a4, 2100x2970\n"
" -t title\tspecify document title\n"
" -w lwid \tdrawing line thickness in thousandths of an em (40)\n"
" -l \tlandscape mode\n"
" -n \talways draw glyphs by name (ps glyphshow)\n";
int main(int argc, char *argv[])
{
int i;
int landscape = 0;
for (i = 1; i < argc; i++) {
if (argv[i][0] == '-' && argv[i][1] == 'F') {
strcpy(postdir, argv[i][2] ? argv[i] + 2 : argv[++i]);
} else if (argv[i][0] == '-' && argv[i][1] == 'p') {
setpagesize(argv[i][2] ? argv[i] + 2 : argv[++i]);
} else if (argv[i][0] == '-' && argv[i][1] == 'w') {
ps_linewidth = atoi(argv[i][2] ? argv[i] + 2 : argv[++i]);
} else if (argv[i][0] == '-' && argv[i][1] == 'n') {
outgname(1);
} else if (argv[i][0] == '-' && argv[i][1] == 't') {
ps_title = argv[i][2] ? argv[i] + 2 : argv[++i];
} else if (argv[i][0] == '-' && argv[i][1] == 'l') {
landscape = 1;
} else {
fprintf(stderr, "%s", usage);
return 1;
}
}
if (landscape) {
int t = ps_pagewidth;
ps_pagewidth = ps_pageheight;
ps_pageheight = t;
}
post();
doctrailer(o_pages);
dev_close();
free(mark_desc);
free(mark_page);
free(mark_offset);
free(mark_level);
free(name_desc);
free(name_page);
free(name_offset);
return 0;
}