<![CDATA[---------------------------------------------------
| Date: 2002-02-02 15:05:54 |
| Filename: binaryrw.c |
| Author: detour@metalshell.com |
| |
| http://www.metalshell.com/ |
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/* binaryrw.c written by detour@metalshell.com
*
* Example of writing a struct to a binary file and then
* reading it back in.
*
* http://www.metalshell.com/
*
*/
#include <stdio.h>
struct zigzag {
int a;
char b[20];
};
int writeBinary(const struct zigzag);
int readBinary(struct zigzag *);
int main() {
struct zigzag myZig, inZig;
struct zigzag *ptr;
/* the memory address we will send to readbinary */
ptr = &inZig;
/* assign some dummy values */
myZig.a = 24;
strcpy(myZig.b, "Blubber");
/* Write the struct myZig and then read it back in */
if(writeBinary(myZig))
exit(1);
if(readBinary(ptr))
exit(1);
/* proof that it was successful */
printf("inZig.a: %d\n", inZig.a);
printf("inZig.b: %s\n", inZig.b);
}
int writeBinary(const struct zigzag j) {
FILE *outFile;
/* open the file we are writing to */
if(!(outFile = fopen("binout", "w")))
return 1;
/* use fwrite to write binary data to the file */
fwrite(&j,sizeof(struct zigzag),1,outFile);
fclose(outFile);
return 0;
}
int readBinary(struct zigzag *b) {
FILE *inFile;
if(!(inFile = fopen("binout", "r")))
return 1;
fread((struct zigzag *)b,sizeof(struct zigzag),1,inFile);
fclose(inFile);
return 0;
}
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