From 6af21e6a4f2251e71353562d5df7f376fdffc270 Mon Sep 17 00:00:00 2001 From: Freya Murphy Date: Tue, 25 Mar 2025 17:36:52 -0400 Subject: initial checkout from wrc --- lib/str2int.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 lib/str2int.c (limited to 'lib/str2int.c') diff --git a/lib/str2int.c b/lib/str2int.c new file mode 100644 index 0000000..c0f777d --- /dev/null +++ b/lib/str2int.c @@ -0,0 +1,51 @@ +/** +** @file str2int.c +** +** @author Numerous CSCI-452 classes +** +** @brief C implementations of common library functions +*/ + +#ifndef STR2INT_SRC_INC +#define STR2INT_SRC_INC + +#include + +#include + +/** +** 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 -- cgit v1.2.3-freya