/* * misc.c *  * This is a collection of several routines from gzip-1.0.3  * adapted for Linux. * * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 * puts by Nick Holloway 1993, better puts by Martin Mares 1995 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996 * * JUN/99 -- hacked to work with uClinux/Coldfire (gerg@moreton.com.au) */#define	NULL		0typedef unsigned int	size_t;/* * gzip declarations */#define OF(args)  args#define STATIC static#define	puts(x)	#define	error(x)	recover(x)void* memset(void* s, int c, size_t n);void* memcpy(void* __dest, const void* __src, size_t __n);#define memzero(s, n)     memset ((s), 0, (n))typedef unsigned char  uch;typedef unsigned short ush;typedef unsigned long  ulg;#define WSIZE 0x8000		/* Window size must be at least 32k, */				/* and a power of two */static uch *inbuf;	     /* input buffer */static uch window[WSIZE];    /* Sliding window buffer */static unsigned insize = 0;  /* valid bytes in inbuf */static unsigned inptr = 0;   /* index of next byte to be processed in inbuf */static unsigned outcnt = 0;  /* bytes in output buffer *//* gzip flag byte */#define ASCII_FLAG   0x01 /* bit 0 set: file probably ascii text */#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */#define ORIG_NAME    0x08 /* bit 3 set: original file name present */#define COMMENT      0x10 /* bit 4 set: file comment present */#define ENCRYPTED    0x20 /* bit 5 set: file is encrypted */#define RESERVED     0xC0 /* bit 6,7:   reserved */#define get_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf())		/* Diagnostic functions */#ifdef DEBUG#  define Assert(cond,msg) {if(!(cond)) error(msg);}#  define Trace(x) fprintf x#  define Tracev(x) {if (verbose) fprintf x ;}#  define Tracevv(x) {if (verbose>1) fprintf x ;}#  define Tracec(c,x) {if (verbose && (c)) fprintf x ;}#  define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}#else#  define Assert(cond,msg)#  define Trace(x)#  define Tracev(x)#  define Tracevv(x)#  define Tracec(c,x)#  define Tracecv(c,x)#endifstatic int  fill_inbuf(void);static void flush_window(void);static void gzip_mark(void **);static void gzip_release(void **);static void *malloc(int size);static void free(void *where);static void gzip_mark(void **);static void gzip_release(void **);  static int input_len;static uch *input_data;static uch *output_data;static unsigned long output_ptr = 0;static long bytes_out = 0;  extern unsigned int _ebss;static unsigned long free_mem_ptr = (long) &_ebss;static unsigned long free_mem_end_ptr = ((long) &_ebss) + (512 * 1024);/* ========================================================================= */ #include "inflate.h"/* ========================================================================= */static void *malloc(int size){	void *p;	if (size <0) error("Malloc error\n");	if (free_mem_ptr <= 0) error("Memory error\n");	free_mem_ptr = (free_mem_ptr + 3) & ~3;	/* Align */	p = (void *)free_mem_ptr;	free_mem_ptr += size;	if (free_mem_ptr >= free_mem_end_ptr)		error("\nOut of memory\n");	return p;}static void free(void *where){	/* Don't care */}static void gzip_mark(void **ptr){	*ptr = (void *) free_mem_ptr;}static void gzip_release(void **ptr){	free_mem_ptr = (long) *ptr;} void* memset(void* s, int c, size_t n){	int i;	char *ss = (char*)s;	for (i=0;i<n;i++) ss[i] = c;}void* memcpy(void* __dest, const void* __src, size_t __n){	int i;	char *d = (char *)__dest, *s = (char *)__src;	for (i=0;i<__n;i++) d[i] = s[i];}/* =========================================================================== * Fill the input buffer. This is called only when the buffer is empty * and at least one byte is really needed. */static int fill_inbuf(){	if (insize != 0) {		error("ran out of input data\n");	}	inbuf = input_data;	insize = input_len;	inptr = 1;	return inbuf[0];}/* =========================================================================== * Write the output window window[0..outcnt-1] and update crc and bytes_out. * (Used for the decompressed data only.) */static void flush_window_low(){    ulg c = crc;         /* temporary variable */    unsigned n;    uch *in, *out, ch;        in = window;    out = &output_data[output_ptr];     for (n = 0; n < outcnt; n++) {	    ch = *out++ = *in++;	    c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);    }    crc = c;    bytes_out += (ulg)outcnt;    output_ptr += (ulg)outcnt;    outcnt = 0;}static void flush_window(){	flush_window_low();}#ifdef BOOTDEBUGstatic void error(char *x){	puts("\n\n");	puts(x);	puts("\n\n -- System halted");	while(1);	/* Halt */}#endifint decompress_image(void *src, void *dst, unsigned int len){	input_data = (uch *) src;	input_len = len;	output_data = (uch *) dst;	makecrc();	puts("Uncompressing...");	gunzip();	puts("done.\n");	return(0);}