/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk> * This file is part of the Linux-8086 C library and is distributed * under the GNU Library General Public License. */ /* * Manuel Novoa III Dec 2000 * * Converted to use my new (un)signed long (long) to string routines, which * are smaller than the previous functions and don't require static buffers. * In the process, removed the reference to strcat and cut object size of * inet_ntoa in half (from 190 bytes down to 94). */ #define __FORCE_GLIBC #include <features.h> #include <string.h> #include <ctype.h> #include <netinet/in.h> int inet_aton(const char *cp, struct in_addr *inp); #ifdef L_inet_aton int inet_aton(cp, inp) const char *cp; struct in_addr *inp; { unsigned long addr; int value; int part; if (!inp) return 0; addr = 0; for (part = 1; part <= 4; part++) { if (!isdigit(*cp)) return 0; value = 0; while (isdigit(*cp)) { value *= 10; value += *cp++ - '0'; if (value > 255) return 0; } if (part < 4) { if (*cp++ != '.') return 0; } else { char c = *cp++; if (c != '\0' && !isspace(c)) return 0; } addr <<= 8; addr |= value; } inp->s_addr = htonl(addr); return 1; } #endif #ifdef L_inet_addr unsigned long inet_addr(cp) const char *cp; { struct in_addr a; if (!inet_aton(cp, &a)) return -1; else return a.s_addr; } #endif #ifdef L_inet_ntoa #include <limits.h> #if (ULONG_MAX >> 32) /* We're set up for 32 bit unsigned longs */ #error need to check size allocation for static buffer 'buf' #endif extern char *__ultostr(char *buf, unsigned long uval, int base, int uppercase); char *inet_ntoa(in) struct in_addr in; { static char buf[16]; /* max 12 digits + 3 '.'s + 1 nul */ unsigned long addr = ntohl(in.s_addr); int i; char *p, *q; q = 0; p = buf + sizeof(buf) - 1; for (i=0 ; i < 4 ; i++ ) { p = __ultostr(p, addr & 0xff, 10, 0 ) - 1; addr >>= 8; if (q) { *q = '.'; } q = p; } return p+1; } #endif