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



#define STRSZE 200  

/*------------------------------------------------------------------------
 * MySubstr() copies a substring from 'infile' starting at index 'start'
 * and ending at index 'end' into a static variable.  A character pointer
 * to this static variable is returned.  If this routine is called multiple
 * times be aware of the use of our static variable.
 *------------------------------------------------------------------------
 */
char *MySubstr(char *infile, int start, int end)
{
	int x, y=0;
	static char returnstr[STRSZE];

	for (x=start; x<end+1; x++)
		returnstr[y++]=infile[x];
	returnstr[y]='\0';
	return returnstr;
}

/*------------------------------------------------------------------------
 * MyPos() finds the position of token in astring
 * and returns the integer index into that array.
 *------------------------------------------------------------------------
 */
int MyPos(char *astring, char *token)
{
	char *ptr;
	static int x;

	ptr = strstr(astring,token);
	if (ptr!=NULL)
		x = ptr - astring;
	else 
		x = -1;
	return x;
}


/*------------------------------------------------------------------------
 * MyLastPos() finds the Last position of 'token' in 'astring'.
 *------------------------------------------------------------------------
 */
int MyLastPos(char *astring, char token)
{
	char *ptr;
	static int x;

	ptr = strrchr(astring,token);
	if (ptr!=NULL)
		x = ptr - astring;
	else
		x = -1;
	return x;
}

/*------------------------------------------------------------------------
 * MyRtrim() removes right white space from 'astring'
 *------------------------------------------------------------------------
 */
void MyRtrim(char *astring)
{
	int x, size;

	size = strlen(astring);
	for (x=--size; x>0; x--){
		if (astring[x]==' ' || astring[x]=='\n' ||
			astring[x]=='\t')
			astring[x]='\0';
		else
			x=0;
	}
}


/*------------------------------------------------------------------------
 * MyStrip() removes leading and trailing characters 'ch' from 'line'
 *------------------------------------------------------------------------
 */
void MyStrip(char *line, char ch)
{
	int i, x, y, z, size;
	char newline[STRSZE];

	size = strlen(line);
	i=0; x=0; y=size;
	// get rid of leading characters
	while (line[x]==ch){
       x++;
    }
	
    // get rid of trailing characters and '\0'
	while (line[y]==ch || line[y]=='\0'){
		y--;
	}

	// copy the string
	for (z=x ;z<y+1; z++){
		newline[i++] = line[z];
	}
	newline[i] = '\0';
	strcpy(line,newline);
	return;
}