diff options
Diffstat (limited to 'sys/pc98/boot/kzipboot/misc.c')
| -rw-r--r-- | sys/pc98/boot/kzipboot/misc.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/sys/pc98/boot/kzipboot/misc.c b/sys/pc98/boot/kzipboot/misc.c deleted file mode 100644 index a971aeec8b83..000000000000 --- a/sys/pc98/boot/kzipboot/misc.c +++ /dev/null @@ -1,207 +0,0 @@ -/* - * misc.c - * - * This is a collection of several routines from gzip-1.0.3 - * adapted for Linux. - * - * Ported to 386bsd by Serge Vakulenko - */ - -#include "gzip.h" - -unsigned outcnt; -unsigned insize; -unsigned inptr; - -extern const char input_data[]; -extern const int input_len; - -int input_ptr; - -int method; - -char *output_data; -ulong output_ptr; - -void makecrc (void); -void putstr (char *c); -void *memcpy (void *to, const void *from, unsigned len); -int memcmp (const void *arg1, const void *arg2, unsigned len); - -ulong crc; /* shift register contents */ -ulong crc_32_tab[256]; /* crc table, defined below */ - -/* - * Run a set of bytes through the crc shift register. If s is a NULL - * pointer, then initialize the crc shift register contents instead. - * Return the current crc in either case. - */ -void updcrc(s, n) -uchar *s; /* pointer to bytes to pump through */ -unsigned n; /* number of bytes in s[] */ -{ - while (n--) - crc = crc_32_tab[(uchar)crc ^ (*s++)] ^ (crc >> 8); -} - -/* - * Clear input and output buffers - */ -void clear_bufs() -{ - outcnt = 0; - insize = inptr = 0; -} - -/* - * Fill the input buffer. This is called only when the buffer is empty - * and at least one byte is really needed. - */ -void fill_inbuf () -{ - int len, i; - - /* Read as much as possible */ - insize = 0; - do { - len = INBUFSIZ - insize; - if (len > input_len - input_ptr + 1) - len = input_len-input_ptr+1; - if (len <= 0) - break; - for (i=0; i<len; i++) - inbuf[insize+i] = input_data[input_ptr+i]; - insize += len; - input_ptr += len; - } while (insize < INBUFSIZ); - if (insize == 0) - error("unable to fill buffer"); - inptr = 0; -} - -/* - * Write the output window window[0..outcnt-1] and update crc and bytes_out. - * (Used for the decompressed data only.) - */ -void flush_window() -{ - if (outcnt == 0) return; - updcrc(window, outcnt); - - memcpy(&output_data[output_ptr], (char *)window, outcnt); - - output_ptr += outcnt; - outcnt = 0; -} - -/* - * Code to compute the CRC-32 table. Borrowed from - * gzip-1.0.3/makecrc.c. - * Not copyrighted 1990 Mark Adler - */ -void makecrc(void) -{ - ulong c; /* crc shift register */ - ulong e; /* polynomial exclusive-or pattern */ - int i; /* counter for all possible eight bit values */ - int k; /* byte being shifted into crc apparatus */ - - /* terms of polynomial defining this crc (except x^32): */ - static const uchar poly[] = { 0,1,2,4,5,7,8,10,11,12,16,22,23,26, }; - - /* Make exclusive-or pattern from polynomial */ - e = 0; - for (i = 0; i < sizeof(poly)/sizeof(*poly); i++) - e |= 1L << (31 - poly[i]); - - crc_32_tab[0] = 0; - - for (i = 1; i < 256; i++) { - c = 0; - for (k = i | 256; k != 1; k >>= 1) { - c = c & 1 ? (c >> 1) ^ e : c >> 1; - if (k & 1) - c ^= e; - } - crc_32_tab[i] = c; - } -} - -/* - * Check the magic number of the input file and update ofname if an - * original name was given and to_stdout is not set. - * Set inptr to the offset of the next byte to be processed. - */ -static void get_method() -{ - uchar flags; - char magic[2]; /* magic header */ - - magic[0] = get_byte(); - magic[1] = get_byte(); - - method = -1; /* unknown yet */ - extended = pkzip = 0; - /* assume multiple members in gzip file except for record oriented I/O */ - - if (memcmp(magic, GZIP_MAGIC, 2) == 0 - || memcmp(magic, OLD_GZIP_MAGIC, 2) == 0) { - method = get_byte(); - flags = get_byte(); - if (flags & ENCRYPTED) - error("Input is encrypted"); - if (flags & CONTINUATION) - error("Multi part input"); - if (flags & RESERVED) - error("Input has invalid flags"); - - (void) get_byte(); /* Get timestamp */ - (void) get_byte(); - (void) get_byte(); - (void) get_byte(); - - (void) get_byte(); /* Ignore extra flags for the moment */ - (void) get_byte(); /* Ignore OS type for the moment */ - - if (flags & EXTRA_FIELD) { - unsigned len = get_byte(); - len |= get_byte() << 8; - while (len--) - (void) get_byte(); - } - - /* Discard file comment if any */ - if (flags & COMMENT) - while (get_byte()) - continue; - - } else if (memcmp(magic, PKZIP_MAGIC, 2) == 0 && inptr == 2 - && memcmp(inbuf, PKZIP_MAGIC, 4) == 0) { - /* - * To simplify the code, we support a zip file when alone only. - * We are thus guaranteed that the entire local header fits in inbuf. - */ - inptr = 0; - check_zipfile(); - - } else if (memcmp(magic, PACK_MAGIC, 2) == 0) - error("packed input"); - else if (memcmp(magic, LZW_MAGIC, 2) == 0) - error("compressed input"); - if (method == -1) - error("Corrupted input"); -} - -void -decompress_kernel (void *dest) -{ - output_data = dest; - output_ptr = 0; - - input_ptr = 0; - - clear_bufs (); - makecrc (); - get_method (); - unzip (); -} |