gistfile1.c

#include "stdio.h"
#include "string.h"

void InsertHtmlSpace(char *inout, unsigned int len)
{
	unsigned int spaces = 0;
	unsigned int i, o;

	for (i = 0; i < len; i++)
	{
		if (inout[i] != ' ')
			continue;	
		spaces++;
	}

	inout[len + spaces * 2] = 0;
	for (i = len - 1; i >= 0; i--)
	{
		if (inout[i] != ' ')
		{
			inout[i + spaces * 2] = inout[i];
		}
		else
		{
			spaces--;
			o = i + spaces * 2;
			inout[o] = '%';
			inout[o+1] = '2';
			inout[o+2] = '0';
			if (spaces == 0)
				return;
		}
	}
}

int main(int argc, char *argv[])
{
	char blerg[255];
	char *sarr[] =
	{
		"This is a test strrrring.",
		"Produce debugging information in the operating system's native format (stabs, COFF, XCOFF, or DWARF 2). GDB can work with this debugging information",
		"gistfile1.c C 679 bytes",
		NULL
	};
	char *s;
	int i = 0;

	for (s = sarr[i]; s != NULL; s = sarr[++i])
	{
		strcpy(blerg, s);
		InsertHtmlSpace(blerg, strlen(blerg));	
		printf("%s\n\n%s\n---\n", s, blerg);
	}

	return 0;
}