#include        <stdio.h>
#include        <errno.h>

extern  int errno;              /* error. see intro (2) */
	/* sizes and limits */
#define BUFSIZE         2048    /* buffer for rows */
#define FILENAMESIZE    256     /* size of unix filename */
#define MAXCOL          512     /* maximum columns in a row */
#define MAXROW          4096    /* maximum rows for search  */
        /* local definitions */
#define INT             0       /* coltype value for int */
#define CHAR            -1      /* coltype value for char */
#define READ            "r"     /* fopen read mode */
#define READWRITE       "r+"    /* fopen update mode */
#define WRITE           "w"     /* fopen write mode */
#define EOS             '\\0'    /* null at end of string */
#define TAB             '\\t'
#define TABWIDTH        8
        /* yes or no / good or bad stuff */
#define MATCH           0       /* string match */
#define NOMATCH         -1      /* no string match */
#define OK              0       /* routine passed */
#define NOT_OK          -1      /* exit error   */
#define N_ERROR         -2      /* coltype value for error */
        /* index stuff */
#define OFFSETWIDTH     9
#define XHEAD           "   Offset\\n"
#define XDASH           "---------\\n"
#define XHEADLENGTH     ((long) (2 * (OFFSETWIDTH + 1)))
        /* date formats */
#define COMPUTER        0
#define EUROPEAN        1
#define US              2

#define tolower(c)      ((c)>='A'&&(c)<='Z'?((c)-'A'+'a'):(c))
#define toupper(c)      ((c)>='a'&&(c)<='z'?((c)-'a'+'A'):(c))

#ifndef NULL
#       define NULL     0       /* null */
#endif

#ifndef SEEK_SET
#       define  SEEK_SET        0
#       define  SEEK_CUR        1
#       define  SEEK_END        2
#endif

#ifndef TRUE
#       define  TRUE            1
#       define  FALSE           0
#endif

/* row and key structures to hold info */
struct rowstruct {
     FILE    *p_filein;      /* file pointer for input */
     FILE    *p_fileout;     /* file pointer for output */
     char    *buffer;        /* points to start of buffer */
     char    *p_buffer;      /* points to write buffer */
     unsigned bufsize;       /* size of buffer */
     char    *p_endbuffer;   /* points to end of buffer */
     char    **p_heads;      /* points to each head in list */
     int     heads;          /* number of head columns */
     long    headlength;     /* head line and dashes */
     char    **p_columns;    /* points to each column found */
     unsigned colsize;       /* size of a char pointer */
     unsigned maxcolumns;    /* maximum columns array */
     int     columns;        /* number of columns */
     int     *collengths;    /* each column's length */
     int     rowlength;      /* entire row length */
     int     fixed;          /* boolean fixed or variable */
     int     list;           /* boolean list or table */
     char    fs;             /* field separation character */
};

/* keystruct->flags values */
#define SINGLEROW       1    /* return after 1st match */
#define NOBLANKEYS      2    /* don't report blank matches */
#define FOLDCASE        4    /* ignore case */
#define EXACTMATCH      8    /* do byte-for-byte compare */
#define NUMERIC         16   /* treat keys as numeric */
#define DELETIT         32   /* delete this key if found */

struct keystruct {
     FILE    *file;          /* file pointer for input */
     FILE    *xfile;         /* file pointer for index */
     char    *p_filename;    /* file name */
     char    *p_xfilename;   /* index file name */
     int     maxkeys;        /* dynamic maximum keys */
     int     keys;           /* number of keys */
     char    **p_keynames;   /* key columns */
     char    **p_keyvalues;  /* key values */
     int     *keytocolumn;   /* key number to column number */
     long    *rowoffsets;    /* offset in file of each row */
     long    keyoffsets;     /* offset in index file key */
     int     rows;           /* number of rows found */
     int     flags;          /* bools for singlerow etc. */
     int     (*compare) ();  /* comparison routine */
};