ico.c revision 3f54fd611f536639ec30dd53c48e5ec1897cc7d9
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* pax ico format
*/
#include <paxlib.h>
#include <ccode.h>
#include <swap.h>
#include <tm.h>
#define ICO_HEADER 6
#define ICO_DIRECTORY 16
#define ICO_MAGIC 0
#define ICO_TYPE 1
#define ICO_PNG_COLORS 0
#define ICO_PNG_PLANES 1
#define ICO_PNG_BPP 32
typedef struct Ico_header_s
{
uint16_t magic;
uint16_t type;
uint16_t count;
} Ico_header_t;
typedef struct Ico_directory_s
{
uint8_t width;
uint8_t height;
uint8_t colors;
uint8_t magic;
uint16_t panes;
uint16_t bpp;
uint32_t size;
uint32_t offset;
} Ico_directory_t;
typedef struct Ico_s
{
Sfio_t* head;
Sfio_t* data;
unsigned char* cur;
int mode;
int entries;
char name[32];
unsigned char dir[1];
} Ico_t;
static int
ico_done(Pax_t* pax, register Paxarchive_t* ap)
{
register Ico_t* ico = (Ico_t*)ap->data;
if (!ico)
return -1;
if (ico->data)
sfclose(ico->data);
if (ico->head)
sfclose(ico->head);
free(ico);
ap->data = 0;
return 0;
}
static int
ico_getprologue(Pax_t* pax, Paxformat_t* fp, register Paxarchive_t* ap, Paxfile_t* f, register unsigned char* p, size_t size)
{
register Ico_t* ico;
size_t m;
size_t n;
if (size < ICO_HEADER + ICO_DIRECTORY)
return 0;
if (swapget(3, p, 2) != ICO_MAGIC || swapget(3, p+2, 2) != ICO_TYPE || p[9] != 0 && p[9] != 255)
return 0;
if (paxseek(pax, ap, ICO_HEADER, SEEK_SET, 1) != ICO_HEADER)
return 0;
m = swapget(3, p+4, 2);
n = m * ICO_DIRECTORY;
if (!(ico = newof(0, Ico_t, 1, n - 1)))
return paxnospace(pax);
umask(ico->mode = umask(0));
ico->mode = X_IFREG | (0666 & ~ico->mode);
ico->entries = m;
if (paxread(pax, ap, ico->dir, n, n, 0) <= 0)
{
free(ico);
return 0;
}
ico->cur = ico->dir;
ap->data = ico;
return 1;
}
static int
ico_getheader(Pax_t* pax, register Paxarchive_t* ap, register Paxfile_t* f)
{
register Ico_t* ico = (Ico_t*)ap->data;
register unsigned char* p;
int width;
int height;
size_t offset;
size_t size;
if (ap->entry > ico->entries)
{
ap->io->eof = 1;
return 0;
}
p = ico->cur;
ico->cur += ICO_DIRECTORY;
width = p[0] ? p[0] : 256;
height = p[1] ? p[1] : 256;
size = swapget(3, p+8, 4);
offset = swapget(3, p+12, 4);
sfsprintf(ico->name, sizeof(ico->name), "ico-%d-c%dp%db%dw%dh%d.ico", ap->entry, p[2], (int)swapget(3, p+4, 2), (int)swapget(3, p+6, 2), width, height);
f->name = ico->name;
f->linktype = PAX_NOLINK;
f->linkpath = 0;
f->st->st_mode = ico->mode;
f->st->st_uid = pax->uid;
f->st->st_gid = pax->gid;
f->st->st_size = size;
f->st->st_mtime = time(NiL);
f->st->st_nlink = 1;
if (paxseek(pax, ap, offset, SEEK_SET, 1) != offset)
return -1;
return 1;
}
static int
ico_getdata(Pax_t* pax, register Paxarchive_t* ap, register Paxfile_t* f, int fd)
{
register Ico_t* ico = (Ico_t*)ap->data;
Sfio_t* sp;
ssize_t n;
size_t z;
unsigned char* dir;
unsigned char hdr[ICO_HEADER];
if (fd < 0 || !f->st->st_size)
return 1;
if (!(sp = paxpart(pax, ap, f->st->st_size)))
return -1;
swapput(3, hdr+0, 2, ICO_MAGIC);
swapput(3, hdr+2, 2, ICO_TYPE);
swapput(3, hdr+4, 2, 1);
sfwrite(sp, hdr, ICO_HEADER);
if (paxdata(pax, ap, f, fd, hdr, ICO_HEADER))
return -1;
dir = ico->cur - ICO_DIRECTORY;
swapput(3, dir+12, 4, ICO_HEADER + ICO_DIRECTORY);
if (paxdata(pax, ap, f, fd, dir, ICO_DIRECTORY))
return -1;
while ((n = sfread(sp, pax->buf, sizeof(pax->buf))) > 0)
if (paxdata(pax, ap, f, fd, pax->buf, n))
return -1;
if (n)
(*pax->errorf)(NiL, pax, 2, "%s: %s: unexpected EOF", ap->name, f->name);
return 1;
}
static int
ico_putprologue(Pax_t* pax, register Paxarchive_t* ap, int append)
{
register Ico_t* ico = (Ico_t*)ap->data;
unsigned char hdr[ICO_HEADER];
if (!ico)
{
if (!(ico = newof(0, Ico_t, 1, 0)) || !(ico->head = sfstropen()) || !(ico->data = sftmp(64 * 1024)))
return paxnospace(pax);
swapput(3, hdr+0, 2, ICO_MAGIC);
swapput(3, hdr+2, 2, ICO_TYPE);
swapput(3, hdr+4, 2, 0);
sfwrite(ico->head, hdr, ICO_HEADER);
ap->data = ico;
}
return 1;
}
static int
ico_putheader(Pax_t* pax, Paxarchive_t* ap, Paxfile_t* f)
{
return 1;
}
static int
ico_putdata(Pax_t* pax, Paxarchive_t* ap, Paxfile_t* f, int fd)
{
register Ico_t* ico = (Ico_t*)ap->data;
Sfio_t* sp;
unsigned char* p;
int d;
ssize_t n;
size_t z;
uint32_t size;
unsigned char dir[ICO_HEADER+ICO_DIRECTORY];
if (!(sp = sfnew(NiL, NiL, SF_UNBOUND, fd, SF_READ)))
return paxnospace(pax);
d = 1;
z = f->st->st_size;
do
{
if ((n = sizeof(pax->buf)) > z)
n = z;
if ((n = sfread(sp, pax->buf, n)) <= 0)
{
if (pax->errorf)
(*pax->errorf)(NiL, pax, 2, "%s: %s: read error", ap->name, f->name);
return -1;
}
p = (unsigned char*)pax->buf;
if (d)
{
if (n < ICO_HEADER + ICO_DIRECTORY)
{
if (pax->errorf)
(*pax->errorf)(NiL, pax, 2, "%s: %s: read error", ap->name, f->name);
return -1;
}
if (swapget(3, p+0, 2) == ICO_MAGIC && swapget(3, p+2, 2) == ICO_TYPE)
{
sfwrite(ico->head, p+ICO_HEADER, ICO_DIRECTORY);
p += ICO_HEADER + ICO_DIRECTORY;
n -= ICO_HEADER + ICO_DIRECTORY;
z -= ICO_HEADER + ICO_DIRECTORY;
}
else if (!memcmp(p, "\x89PNG\x0d\x0a\x1a\x0a", 8))
{
dir[0] = (d = swapget(0, p+16, 4)) < 256 ? d : 0;
dir[1] = (d = swapget(0, p+20, 4)) < 256 ? d : 0;
dir[2] = ICO_PNG_COLORS;
dir[3] = 0;
swapput(3, dir+4, 2, ICO_PNG_PLANES);
swapput(3, dir+6, 2, ICO_PNG_BPP);
swapput(3, dir+8, 2, f->st->st_size);
swapput(3, dir+12, 2, 0);
sfwrite(ico->head, dir, ICO_DIRECTORY);
}
else
{
if (pax->errorf)
(*pax->errorf)(NiL, pax, 2, "%s: %s: not an icon resource or image", ap->name, f->name);
return -1;
}
d = 0;
}
sfwrite(ico->data, p, n);
} while (z -= n);
if (sfclose(sp))
{
if (pax->errorf)
(*pax->errorf)(NiL, pax, 2, "%s: %s: write error", ap->name, f->name);
return -1;
}
return n;
}
static off_t
ico_putepilogue(Pax_t* pax, Paxarchive_t* ap)
{
register Ico_t* ico = (Ico_t*)ap->data;
register unsigned char* p;
unsigned char* b;
int i;
uint32_t size;
uint32_t offset;
b = p = (unsigned char*)sfstrbase(ico->head);
swapput(3, p+4, 2, ap->entry);
p += ICO_HEADER;
size = offset = ICO_HEADER + ap->entries * ICO_DIRECTORY;
for (i = 0; i < ap->entry; i++)
{
swapput(3, p+12, 4, offset);
offset += swapget(3, p+8, 4);
p += ICO_DIRECTORY;
}
paxwrite(pax, ap, b, size);
sfseek(ico->data, 0, SEEK_SET);
while ((i = sfread(ico->data, pax->buf, sizeof(pax->buf))) > 0)
paxwrite(pax, ap, pax->buf, i);
if (i < 0)
{
if (pax->errorf)
(*pax->errorf)(NiL, pax, 2, "%s: write error", ap->name);
return -1;
}
return 1;
}
Paxformat_t pax_ico_format =
{
"ico",
0,
"windows icon file",
0,
PAX_ARCHIVE|PAX_NOHARDLINKS|PAX_IN|PAX_OUT,
PAX_DEFBUFFER,
PAX_DEFBLOCKS,
0,
PAXNEXT(ico),
0,
ico_done,
ico_getprologue,
ico_getheader,
ico_getdata,
0,
0,
ico_putprologue,
ico_putheader,
ico_putdata,
0,
ico_putepilogue,
};
PAXLIB(ico)