A small bit of code to convert TABS in a source file to spaces.

fixtab.c

/*
	FixTabs By DreamVB
	Version 1.0
	A small tool to convert \t tabs to a number of specified number of spaces.

	Please feel free to to use as you like.
	Please let me know if you found this code usfull e. [email protected]
*/

#include <stdio.h>
#include <string>

int main(int argc, char* argv[]){
	FILE *fin = NULL;
	FILE *fout = NULL;
	int TabSize = 8;
	int spc = 0;
	char c = '\0';

	if(argc < 3){
		printf("Usage: <InFile> <OutFile> [TabSize]\n");
		return 0;
	}

	if(argc == 4){
		//Convert tabsize to int
		TabSize = atoi(argv[3]);
	}

	//Check for vaild tabsize
	if(TabSize < 0){
		TabSize = 8;
	}

	//Open inputfile.
	fin = fopen(argv[1],"r");
	//Try and see if inputfile opened.
	if(fin == NULL){
		printf("IO/Error cannot open file\n");
		return 0;
	}
	//Open output file
	fout = fopen(argv[2],"w");

	//See if output file opened.
	if(!fout){
		printf("IO/Error cannot write file\n");
		return 0;
	}

	while(!feof(fin)){
		//Read char
		c = getc(fin);

		if(!feof(fin)){
			//Test for tab char
			if(c == '\t'){
				//Replace with 1 tab with a number of spaces.
				do{
					//Put space
					fputc(' ',fout);
					//INC space counter
					spc++;
				}while(spc % TabSize);
				//Keep eveything going
				continue;
			}
			//Put char into output file.
			fputc(c,fout);
		}
	}

	//Close files
	fclose(fin);
	fclose(fout);

	return 1;
}