mirror of
https://github.com/Shpoike/Quakespasm.git
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342c135a12
git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@971 af15c1b1-3010-417e-b628-4374ebc0bcbd
135 lines
2.7 KiB
Bash
Executable file
135 lines
2.7 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2014, Sander van Dijk <a.h.vandijk@gmail.com>
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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error() {
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echo "$(basename "$0"): $*" >&2
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exit 1
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}
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assert_valid_stdout() {
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if test -t 1
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then
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error "Usage: $(basename "$0") [file ...] > output.pak"
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fi
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}
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assert_valid_file() {
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if test ! -e "$1"
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then
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error "$1: No such file"
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fi
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if test ! -f "$1"
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then
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error "$f: Not a regular file"
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fi
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if test ! -r "$1"
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then
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error "$1: Permission denied"
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fi
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if test $(echo -n "$1" | wc -c) -gt 55
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then
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error "$1: Name too long"
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fi
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}
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assert_valid_int32() {
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if test $1 -lt -2147483648 -o $1 -gt 2147483647
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then
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error "Too much data"
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fi
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}
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octal() {
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if test $1 -gt 7
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then
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octal $(expr $1 / 8)
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fi
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echo -n $(expr $1 % 8)
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}
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byte() {
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echo -en \\0$(octal $1)
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}
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little_endian_uint32() {
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byte $(expr $1 % 256)
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byte $(expr $1 / 256 % 256)
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byte $(expr $1 / 65536 % 256)
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byte $(expr $1 / 16777216 % 256)
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}
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little_endian_int32() {
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if test $1 -lt 0
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then
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little_endian_uint32 $(expr $1 + 4294967296)
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else
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little_endian_uint32 $1
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fi
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}
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zero_padding() {
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if test $1 -lt 1
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then
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return
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fi
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byte 0
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zero_padding $(expr $1 - 1)
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}
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header() {
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echo -n PACK
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little_endian_int32 $1
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little_endian_int32 $2
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}
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directory_entry() {
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echo -n "$1"
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zero_padding $(expr 56 - $(echo -n "$1" | wc -c))
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little_endian_int32 $2
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little_endian_int32 $3
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}
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assert_valid_stdout
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directory_offset=12
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directory_size=0
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for file in "$@"
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do
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assert_valid_file "$file"
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file_offset=$directory_offset
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assert_valid_int32 $file_offset
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file_size=$(wc -c < "$file")
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assert_valid_int32 $file_size
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directory_offset=$(expr $directory_offset + $file_size)
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assert_valid_int32 $directory_offset
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directory_size=$(expr $directory_size + 64)
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assert_valid_int32 $directory_size
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done
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header $directory_offset $directory_size
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for file in "$@"
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do
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cat "$file"
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done
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file_offset=12
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for file in "$@"
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do
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file_size=$(wc -c < "$file")
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directory_entry "$file" $file_offset $file_size
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file_offset=$(expr $file_offset + $file_size)
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done
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