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/**
** @file str2int.c
**
** @author Numerous CSCI-452 classes
**
** @brief C implementations of common library functions
*/
#ifndef STR2INT_SRC_INC
#define STR2INT_SRC_INC
#include <common.h>
#include <lib.h>
/**
** str2int(str,base) - convert a string to a number in the specified base
**
** @param str The string to examine
** @param base The radix to use in the conversion
**
** @return The converted integer
*/
int str2int( register const char *str, register int base ) {
register int num = 0;
register char bchar = '9';
int sign = 1;
// check for leading '-'
if( *str == '-' ) {
sign = -1;
++str;
}
if( base != 10 ) {
bchar = '0' + base - 1;
}
// iterate through the characters
while( *str ) {
if( *str < '0' || *str > bchar )
break;
num = num * base + *str - '0';
++str;
}
// return the converted value
return( num * sign );
}
#endif
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