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- /***********************************************************
- ar.h
- ***********************************************************/
- #include <stdio.h>
- #include <limits.h>
- typedef unsigned char uchar; /* 8 bits or more */
- typedef unsigned int uint; /* 16 - 32 bits or more */
- typedef unsigned short ushort; /* 16 bits or more */
- typedef unsigned long ulong; /* 32 bits or more */
-
- /* ar.c */
-
- extern int unpackable;
- extern ulong origsize, compsize;
-
- /* io.c */
-
- extern FILE *arcfile, *infile, *outfile;
- extern ushort crc, bitbuf;
-
- void error(char *fmt, ...);
- void make_crctable(void);
- void fillbuf(uchar n);
- ushort getbits(uchar n);
- /* void putbit(uchar bit); */
- void putbits(uchar n, ushort x);
- int fread_crc(uchar *p, int n, FILE *f);
- void fwrite_crc(uchar *p, int n, FILE *f);
- void init_getbits(void);
- void init_putbits(void);
-
- /* slide.c */
-
- #define DICBIT 12 /* 12 or 13 */
- #define DICSIZ (1U << DICBIT)
- #define MATCHBIT 8 /* bits for MAXMATCH - THRESHOLD */
- #define MAXMATCH 256 /* formerly F (not more than UCHAR_MAX + 1) */
- #define THRESHOLD 3 /* choose optimal value */
-
- void encode(void);
- void decode(void);
-
- /* huf.c */
-
- #define NC (UCHAR_MAX + MAXMATCH + 2 - THRESHOLD)
- /* alphabet = {0, 1, 2, ..., NC - 1} */
- #define CBIT 9 /* $\lfloor \log_2 NC \rfloor + 1$ */
- #define USHRT_BIT (CHAR_BIT * sizeof(ushort))
-
- extern short left[], right[];
-
- void encode_start(void);
- void decode_start(void);
- ushort decode_c(void);
- ushort decode_p(void);
- void output(ushort c, ushort p);
- void encode_end(void);
-
- /* maketbl.c */
-
- void make_table(short nchar, uchar bitlen[],
- short tablebits, ushort table[]);
-
- /* maketree.c */
-
- short make_tree(short nparm, ushort freqparm[], uchar lenparm[]);