diff options
Diffstat (limited to 'contrib/syslinux/syslinux-4.03/com32/lib/sys/zfile.c')
| -rw-r--r-- | contrib/syslinux/syslinux-4.03/com32/lib/sys/zfile.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/contrib/syslinux/syslinux-4.03/com32/lib/sys/zfile.c b/contrib/syslinux/syslinux-4.03/com32/lib/sys/zfile.c deleted file mode 100644 index 0e6ba91..0000000 --- a/contrib/syslinux/syslinux-4.03/com32/lib/sys/zfile.c +++ /dev/null @@ -1,171 +0,0 @@ -/* ----------------------------------------------------------------------- * - * - * Copyright 2003-2008 H. Peter Anvin - All Rights Reserved - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom - * the Software is furnished to do so, subject to the following - * conditions: - * - * The above copyright notice and this permission notice shall - * be included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - * ----------------------------------------------------------------------- */ - -#include <errno.h> -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include <stdlib.h> -#include <syslinux/zio.h> - -#include "file.h" -#include "zlib.h" - -/* - * zopen.c - * - * Open an ordinary file, possibly compressed; if so, insert - * an appropriate decompressor. - */ - -int __file_get_block(struct file_info *fp); -int __file_close(struct file_info *fp); - -static ssize_t gzip_file_read(struct file_info *, void *, size_t); -static int gzip_file_close(struct file_info *); - -static const struct input_dev gzip_file_dev = { - .dev_magic = __DEV_MAGIC, - .flags = __DEV_FILE | __DEV_INPUT, - .fileflags = O_RDONLY, - .read = gzip_file_read, - .close = gzip_file_close, - .open = NULL, -}; - -static int gzip_file_init(struct file_info *fp) -{ - z_streamp zs = calloc(1, sizeof(z_stream)); - - if (!zs) - return -1; - - fp->i.pvt = zs; - - zs->next_in = (void *)fp->i.datap; - zs->avail_in = fp->i.nbytes; - - if (inflateInit2(zs, 15 + 32) != Z_OK) { - errno = EIO; - return -1; - } - - fp->iop = &gzip_file_dev; - fp->i.fd.size = -1; /* Unknown */ - - return 0; -} - -static ssize_t gzip_file_read(struct file_info *fp, void *ptr, size_t n) -{ - z_streamp zs = fp->i.pvt; - int rv; - ssize_t bytes; - ssize_t nout = 0; - unsigned char *p = ptr; - - while (n) { - zs->next_out = p; - zs->avail_out = n; - - if (!zs->avail_in && fp->i.fd.handle) { - if (__file_get_block(fp)) - return nout ? nout : -1; - - zs->next_in = (void *)fp->i.datap; - zs->avail_in = fp->i.nbytes; - } - - rv = inflate(zs, Z_SYNC_FLUSH); - - bytes = n - zs->avail_out; - nout += bytes; - p += bytes; - n -= bytes; - - switch (rv) { - case Z_DATA_ERROR: - case Z_NEED_DICT: - case Z_BUF_ERROR: - case Z_STREAM_ERROR: - default: - errno = EIO; - return nout ? nout : -1; - case Z_MEM_ERROR: - errno = ENOMEM; - return nout ? nout : -1; - case Z_STREAM_END: - return nout; - case Z_OK: - break; - } - } - - return nout; -} - -static int gzip_file_close(struct file_info *fp) -{ - z_streamp zs = fp->i.pvt; - - inflateEnd(zs); - free(zs); - return __file_close(fp); -} - -int zopen(const char *pathname, int flags, ...) -{ - int fd, rv; - struct file_info *fp; - - /* We don't actually give a hoot about the creation bits... */ - fd = open(pathname, flags, 0); - - if (fd < 0) - return -1; - - fp = &__file_info[fd]; - - /* Need to get the first block into the buffer, but not consumed */ - if (__file_get_block(fp)) - goto err; - - if (fp->i.nbytes >= 14 && - (uint8_t) fp->i.buf[0] == 037 && - (uint8_t) fp->i.buf[1] == 0213 && /* gzip */ - fp->i.buf[2] == 8) /* deflate */ - rv = gzip_file_init(fp); - else - rv = 0; /* Plain file */ - - if (!rv) - return fd; - -err: - close(fd); - return -1; -} |