mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-09 04:24:01 +00:00
322ae93a5e
segfaulting or handling errors the same way themselves.
231 lines
4.9 KiB
C
231 lines
4.9 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* loadfont.c - Eugene Crosser & Andries Brouwer
|
|
*
|
|
* Version 0.96bb
|
|
*
|
|
* Loads the console font, and possibly the corresponding screen map(s).
|
|
* (Adapted for busybox by Matej Vela.)
|
|
*/
|
|
#include "internal.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <memory.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/kd.h>
|
|
#include <endian.h>
|
|
|
|
#define PSF_MAGIC1 0x36
|
|
#define PSF_MAGIC2 0x04
|
|
|
|
#define PSF_MODE512 0x01
|
|
#define PSF_MODEHASTAB 0x02
|
|
#define PSF_MAXMODE 0x03
|
|
#define PSF_SEPARATOR 0xFFFF
|
|
|
|
struct psf_header {
|
|
unsigned char magic1, magic2; /* Magic number */
|
|
unsigned char mode; /* PSF font mode */
|
|
unsigned char charsize; /* Character size */
|
|
};
|
|
|
|
#define PSF_MAGIC_OK(x) ((x).magic1 == PSF_MAGIC1 && (x).magic2 == PSF_MAGIC2)
|
|
|
|
static void loadnewfont(int fd);
|
|
|
|
extern int loadfont_main(int argc, char **argv)
|
|
{
|
|
int fd;
|
|
|
|
if (argc>=2 && *argv[1]=='-') {
|
|
usage(loadfont_usage);
|
|
}
|
|
|
|
fd = open("/dev/tty0", O_RDWR);
|
|
if (fd < 0) {
|
|
errorMsg("Error opening /dev/tty0: %s\n", strerror(errno));
|
|
return( FALSE);
|
|
}
|
|
loadnewfont(fd);
|
|
|
|
return( TRUE);
|
|
}
|
|
|
|
static void do_loadfont(int fd, char *inbuf, int unit, int fontsize)
|
|
{
|
|
char buf[16384];
|
|
int i;
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
|
|
if (unit < 1 || unit > 32) {
|
|
errorMsg("Bad character size %d\n", unit);
|
|
exit(1);
|
|
}
|
|
|
|
for (i = 0; i < fontsize; i++)
|
|
memcpy(buf + (32 * i), inbuf + (unit * i), unit);
|
|
|
|
#if defined( PIO_FONTX ) && !defined( __sparc__ )
|
|
{
|
|
struct consolefontdesc cfd;
|
|
|
|
cfd.charcount = fontsize;
|
|
cfd.charheight = unit;
|
|
cfd.chardata = buf;
|
|
|
|
if (ioctl(fd, PIO_FONTX, &cfd) == 0)
|
|
return; /* success */
|
|
perror("PIO_FONTX ioctl error (trying PIO_FONT)");
|
|
}
|
|
#endif
|
|
if (ioctl(fd, PIO_FONT, buf)) {
|
|
perror("PIO_FONT ioctl error");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
|
|
{
|
|
struct unimapinit advice;
|
|
struct unimapdesc ud;
|
|
struct unipair *up;
|
|
int ct = 0, maxct;
|
|
int glyph;
|
|
u_short unicode;
|
|
|
|
maxct = tailsz; /* more than enough */
|
|
up = (struct unipair *) xmalloc(maxct * sizeof(struct unipair));
|
|
|
|
for (glyph = 0; glyph < fontsize; glyph++) {
|
|
while (tailsz >= 2) {
|
|
unicode = (((u_short) inbuf[1]) << 8) + inbuf[0];
|
|
tailsz -= 2;
|
|
inbuf += 2;
|
|
if (unicode == PSF_SEPARATOR)
|
|
break;
|
|
up[ct].unicode = unicode;
|
|
up[ct].fontpos = glyph;
|
|
ct++;
|
|
}
|
|
}
|
|
|
|
/* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
|
|
this printf did not work on many kernels */
|
|
|
|
advice.advised_hashsize = 0;
|
|
advice.advised_hashstep = 0;
|
|
advice.advised_hashlevel = 0;
|
|
if (ioctl(fd, PIO_UNIMAPCLR, &advice)) {
|
|
#ifdef ENOIOCTLCMD
|
|
if (errno == ENOIOCTLCMD) {
|
|
errorMsg("It seems this kernel is older than 1.1.92\n");
|
|
errorMsg("No Unicode mapping table loaded.\n");
|
|
} else
|
|
#endif
|
|
perror("PIO_UNIMAPCLR");
|
|
exit(1);
|
|
}
|
|
ud.entry_ct = ct;
|
|
ud.entries = up;
|
|
if (ioctl(fd, PIO_UNIMAP, &ud)) {
|
|
#if 0
|
|
if (errno == ENOMEM) {
|
|
/* change advice parameters */
|
|
}
|
|
#endif
|
|
perror("PIO_UNIMAP");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
static void loadnewfont(int fd)
|
|
{
|
|
int unit;
|
|
char inbuf[32768]; /* primitive */
|
|
unsigned int inputlth, offset;
|
|
|
|
/*
|
|
* We used to look at the length of the input file
|
|
* with stat(); now that we accept compressed files,
|
|
* just read the entire file.
|
|
*/
|
|
inputlth = fread(inbuf, 1, sizeof(inbuf), stdin);
|
|
if (ferror(stdin)) {
|
|
perror("Error reading input font");
|
|
exit(1);
|
|
}
|
|
/* use malloc/realloc in case of giant files;
|
|
maybe these do not occur: 16kB for the font,
|
|
and 16kB for the map leaves 32 unicode values
|
|
for each font position */
|
|
if (!feof(stdin)) {
|
|
perror("Font too large");
|
|
exit(1);
|
|
}
|
|
|
|
/* test for psf first */
|
|
{
|
|
struct psf_header psfhdr;
|
|
int fontsize;
|
|
int hastable;
|
|
unsigned int head0, head;
|
|
|
|
if (inputlth < sizeof(struct psf_header))
|
|
goto no_psf;
|
|
|
|
psfhdr = *(struct psf_header *) &inbuf[0];
|
|
|
|
if (!PSF_MAGIC_OK(psfhdr))
|
|
goto no_psf;
|
|
|
|
if (psfhdr.mode > PSF_MAXMODE) {
|
|
errorMsg("Unsupported psf file mode\n");
|
|
exit(1);
|
|
}
|
|
fontsize = ((psfhdr.mode & PSF_MODE512) ? 512 : 256);
|
|
#if !defined( PIO_FONTX ) || defined( __sparc__ )
|
|
if (fontsize != 256) {
|
|
errorMsg("Only fontsize 256 supported\n");
|
|
exit(1);
|
|
}
|
|
#endif
|
|
hastable = (psfhdr.mode & PSF_MODEHASTAB);
|
|
unit = psfhdr.charsize;
|
|
head0 = sizeof(struct psf_header);
|
|
|
|
head = head0 + fontsize * unit;
|
|
if (head > inputlth || (!hastable && head != inputlth)) {
|
|
errorMsg("Input file: bad length\n");
|
|
exit(1);
|
|
}
|
|
do_loadfont(fd, inbuf + head0, unit, fontsize);
|
|
if (hastable)
|
|
do_loadtable(fd, inbuf + head, inputlth - head, fontsize);
|
|
return;
|
|
}
|
|
no_psf:
|
|
|
|
/* file with three code pages? */
|
|
if (inputlth == 9780) {
|
|
offset = 40;
|
|
unit = 16;
|
|
} else {
|
|
/* bare font */
|
|
if (inputlth & 0377) {
|
|
errorMsg("Bad input file size\n");
|
|
exit(1);
|
|
}
|
|
offset = 0;
|
|
unit = inputlth / 256;
|
|
}
|
|
do_loadfont(fd, inbuf + offset, unit, 256);
|
|
}
|