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moved biggest stack buffers to malloc space, or made their size configurable

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(8k of shell line edit buffer is an overkill)

# make ARCH=i386 bloatcheck
function                                             old     new   delta
read_line_input                                     3933    3967     +34
ifaddrlist                                           348     345      -3
do_loadfont                                          208     191     -17
edit_file                                            840     819     -21
.rodata                                           129112  129080     -32
uncompress                                          1305    1268     -37
loadfont_main                                        566     495     -71
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/6 up/down: 34/-181)          Total: -147 bytes
This commit is contained in:
Denis Vlasenko
2007-06-10 15:08:44 +00:00
parent d4fea900bd
commit e8a0788b24
8 changed files with 179 additions and 149 deletions
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77
console-tools/loadfont.c
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@@ -21,43 +21,27 @@ enum {
};
struct psf_header {
unsigned char magic1, magic2; /* Magic number */
unsigned char mode; /* PSF font mode */
unsigned char charsize; /* Character size */
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);
int loadfont_main(int argc, char **argv);
int loadfont_main(int argc, char **argv)
{
int fd;
if (argc != 1)
bb_show_usage();
fd = xopen(CURRENT_VC, O_RDWR);
loadnewfont(fd);
return EXIT_SUCCESS;
}
static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
{
char buf[16384];
char *buf;
int i;
memset(buf, 0, sizeof(buf));
if (unit < 1 || unit > 32)
bb_error_msg_and_die("bad character size %d", unit);
buf = xzalloc(16 * 1024);
/*memset(buf, 0, 16 * 1024);*/
for (i = 0; i < fontsize; i++)
memcpy(buf + (32 * i), inbuf + (unit * i), unit);
#if defined( PIO_FONTX ) && !defined( __sparc__ )
#if defined(PIO_FONTX) && !defined(__sparc__)
{
struct consolefontdesc cfd;
@@ -66,12 +50,14 @@ static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
cfd.chardata = buf;
if (ioctl(fd, PIO_FONTX, &cfd) == 0)
return; /* success */
bb_perror_msg("PIO_FONTX ioctl error (trying PIO_FONT)");
goto ret; /* success */
bb_perror_msg("PIO_FONTX ioctl (will try PIO_FONT)");
}
#endif
if (ioctl(fd, PIO_FONT, buf))
bb_perror_msg_and_die("PIO_FONT ioctl error");
bb_perror_msg_and_die("PIO_FONT ioctl");
ret:
free(buf);
}
static void
@@ -124,31 +110,30 @@ do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
static void loadnewfont(int fd)
{
enum { INBUF_SIZE = 32*1024 + 1 };
int unit;
unsigned char inbuf[32768]; /* primitive */
unsigned int inputlth, offset;
unsigned inputlth, offset;
/* Was on stack, but 32k is a bit too much: */
unsigned char *inbuf = xmalloc(INBUF_SIZE);
/*
* 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))
inputlth = full_read(STDIN_FILENO, inbuf, INBUF_SIZE);
if (inputlth < 0)
bb_perror_msg_and_die("error reading input font");
/* 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))
bb_perror_msg_and_die("font too large");
if (inputlth >= INBUF_SIZE)
bb_error_msg_and_die("font too large");
/* test for psf first */
{
struct psf_header psfhdr;
int fontsize;
int hastable;
unsigned int head0, head;
unsigned head0, head;
if (inputlth < sizeof(struct psf_header))
goto no_psf;
@@ -161,7 +146,7 @@ static void loadnewfont(int fd)
if (psfhdr.mode > PSF_MAXMODE)
bb_error_msg_and_die("unsupported psf file mode");
fontsize = ((psfhdr.mode & PSF_MODE512) ? 512 : 256);
#if !defined( PIO_FONTX ) || defined( __sparc__ )
#if !defined(PIO_FONTX) || defined(__sparc__)
if (fontsize != 256)
bb_error_msg_and_die("only fontsize 256 supported");
#endif
@@ -177,8 +162,8 @@ static void loadnewfont(int fd)
do_loadtable(fd, inbuf + head, inputlth - head, fontsize);
return;
}
no_psf:
no_psf:
/* file with three code pages? */
if (inputlth == 9780) {
offset = 40;
@@ -192,3 +177,17 @@ static void loadnewfont(int fd)
}
do_loadfont(fd, inbuf + offset, unit, 256);
}
int loadfont_main(int argc, char **argv);
int loadfont_main(int argc, char **argv)
{
int fd;
if (argc != 1)
bb_show_usage();
fd = xopen(CURRENT_VC, O_RDWR);
loadnewfont(fd);
return EXIT_SUCCESS;
}