MS-DOS-kernel/utils/patchobj.c at master · Programuserbash/MS-DOS-kernel · GitHub

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/*****************************************************************************

** PATCHOBJ facility - change strings in the LNAMES record

** GPL bla to be added, but intended as GPL

** 09/06/2001 - initial revision

** not my biggest kind of software; anyone willing to add

** comments, errormessages, usage info,...???

*****************************************************************************/

#include <stdio.h>

#if defined(__GNUC__) || defined(__WATCOMC__)

#include <unistd.h>

#else

#include <io.h>

#endif

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

#ifndef TRUE

#define TRUE (1==1)

#define FALSE (0==1)

#endif

struct {

char *sin, *sout;

} repl[100];

int repl_count;

void go_records(FILE * fdin, FILE * fdo);

void quit(char *s, ...)

{

vprintf(s, (void *)((char *)&s + sizeof(s)));

exit(1);

}

void define_replace(char *sin)

{

char *s;

if (repl_count >= 99)

quit("too many replacements");

if ((s = strchr(sin, '=')) == NULL)

quit("illegal replacement <%s>, missing '='", sin);

*s = 0;

repl[repl_count].sin = sin;

repl[repl_count].sout = s + 1;

repl_count++;

}

int main(int argc, char *argv[])

{

char *argptr;

FILE *fd, *fdo;

char *inname = 0, *outname = "~patchob.tmp";

int use_temp_file = TRUE;

argc--, argv++;

for (; argc != 0; argc--, argv++)

{

argptr = *argv;

if (*argptr != '-' && *argptr != '/')

{

if (argc == 1)

{

inname = argptr;

continue;

}

define_replace(argptr);

continue;

}

switch (toupper(argptr[1]))

{

case 'O':

outname = argptr + 2;

use_temp_file = FALSE;

break;

default:

quit("illegal argument <%s>\n", argptr);

break;

}

if (inname == 0)

quit("Inputfile must be specified\n");

if (repl_count == 0)

quit("no replacements defined");

if ((fd = fopen(inname, "rb")) == NULL) /* open for READ/WRITE */

quit("can't read %s\n", inname);

if ((fdo = fopen(outname, "wb")) == NULL) /* open for READ/WRITE */

quit("can't write %s\n", outname);

go_records(fd, fdo);

fclose(fd);

fclose(fdo);

if (use_temp_file)

{

unlink(inname);

rename(outname, inname);

}

return 0;

}

#include "algnbyte.h"

struct record {

unsigned char rectyp;

unsigned short datalen;

char buffer[0x2000];

} Record, Outrecord;

#include "algndflt.h"

struct verify_pack1 { char x[ sizeof(struct record) == 0x2003 ? 1 : -1];};

void go_records(FILE * fdin, FILE * fdo)

{

unsigned char stringlen;

char *string, *s;

int i, j;

unsigned char chksum;

{

if (fread(&Record, 1, 3, fdin) != 3)

{ /* read type and reclen */

/* printf("end of fdin read\n"); */

break;

}

if (Record.datalen > sizeof(Record.buffer))

quit("record to large : length %u Bytes \n", Record.datalen);

if (fread(Record.buffer, 1, Record.datalen, fdin) != Record.datalen)

{

printf("invalid record format\n");

quit("can't continue\n");

}

if (Record.rectyp != 0x96 && Record.rectyp != 0x8c) /* we are only interested in LNAMES */

{

fwrite(&Record, 1, 3 + Record.datalen, fdo);

continue;

}

/* printf("at %lx - record type %x len %x\n",ftell(fdin)-3,Record.rectyp,

Record.datalen);*/

Outrecord.rectyp = Record.rectyp;

Outrecord.datalen = 0;

for (i = 0; i < Record.datalen - 1;)

{

stringlen = (unsigned char)Record.buffer[i];

i++;

string = &Record.buffer[i];

i += stringlen;

if (i > Record.datalen)

quit("invalid lnames record");

for (j = 0; j < repl_count; j++)

if (memcmp(string, repl[j].sin, stringlen) == 0

&& strlen(repl[j].sin) == stringlen)

{

string = repl[j].sout;

stringlen = strlen(repl[j].sout);

}

Outrecord.buffer[Outrecord.datalen] = stringlen;

Outrecord.datalen++;

memcpy(Outrecord.buffer + Outrecord.datalen, string, stringlen);

Outrecord.datalen += stringlen;

}

chksum = 0;

for (s = (char *)&Outrecord;

s < &Outrecord.buffer[Outrecord.datalen]; s++)

chksum += (unsigned char)*s;

Outrecord.buffer[Outrecord.datalen] = ~chksum;

Outrecord.datalen++;

/* printf("^sum = %02x - %02x\n",chksum,~chksum); */

fwrite(&Outrecord, 1, 3 + Outrecord.datalen, fdo);

}

while (Record.rectyp != 0x00 /*ENDFIL*/);

}

MS-DOS-kernel/utils/patchobj.c at master · Programuserbash/MS-DOS-kernel · GitHub

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