Category : Dbase (Clipper, FoxBase, etc) Languages Source Code
Archive : READNDX.ZIP
Filename : READNDX.C
Output of file : READNDX.C contained in archive : READNDX.ZIP
readndx.c: spits out some info about dBase III Plus NDX files
Andrew Schulman 1/4/88, revised 1/14/88
12 Humboldt St., Cambridge MA 02140
compiled with MSC 5.0:
cl -Zpe -Ox -Gs readndx.c \msc5\lib\ssetargv.obj
ssetargv.obj takes care of wildcard expansion
based on information supplied by Pete Olympia. Thanks, Pete!
and by information from Curtis H. Hoffman (".DBF and .NDX Header Definitions")
*/
#include
#include
#include
#include
#define MAXKEYLEN 100
typedef unsigned char BYTE;
typedef unsigned long DWORD;
typedef struct
{
DWORD rootnode;
DWORD nextnode;
DWORD pad1;
BYTE keylen, pad2;
BYTE keypernode, pad3;
BYTE numeric, pad4;
BYTE sizekeyentry;
char pad5[5];
char expression[MAXKEYLEN];
char pad6[512-124];
BYTE numentries;
char pad7[3];
} NDX_HEAD;
NDX_HEAD ndx;
main(argc, argv)
int argc;
char *argv[];
{
register int i;
if (argc<2) {
printf("READNDX reads dBase III Plus NDX files. Big deal!\n");
printf("examples:\n\tREADNDX inv1987.*\n\tREADNDX *.*\n\tREADNDX *.NDX\n");
exit(1);
}
for (i=1; i
printf("\n");
}
exit(0);
}
readndx(s)
char *s;
{
char file[80];
unsigned int f, count;
strcpy(file,strupr(s));
if (! strchr(file, '.')) strcat(file, ".NDX");
if (_dos_open(file, O_RDONLY | O_BINARY, &f) != 0) {
printf("READNDX cannot open file (%s)\n", file);
return;
}
if (_dos_read(f, (void far *)&ndx, sizeof(NDX_HEAD), &count) != 0) {
printf("Can't read from file (%s)\n", file);
return;
}
/***
THIS IS THE BIG TEST TO DETERMINE IF IT'S A DBASE NDX FILE (THE NDX
EXTENSION DOESN'T MEAN IT IS; AND THE LACK OF ONE DOESN'T MEAN IT ISN'T)
***/
if (! ndx.sizekeyentry || ndx.keypernode != (508 / ndx.sizekeyentry)) {
printf("Not a dBase III Plus index file (%s)\n", file);
return;
}
printf("dBase III Plus index file %s\n", file);
printf("key expression: \"%s\"\n", ndx.expression);
printf("rootnode: %lu\n", ndx.rootnode);
printf("nextnode: %lu\n", ndx.nextnode);
printf("keylen: %d\n", ndx.keylen);
printf("keypernode: %d\n", ndx.keypernode);
printf("numeric flag: %d\n", ndx.numeric);
printf("sizekeyentry: %d\n", ndx.sizekeyentry);
printf("root node num entries: %d\n", ndx.numentries);
_dos_close(f);
}
Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!
This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.
But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/