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Diffstat (limited to 'src/libfreeswan/atoul.c')
-rw-r--r-- | src/libfreeswan/atoul.c | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/src/libfreeswan/atoul.c b/src/libfreeswan/atoul.c deleted file mode 100644 index d8e1528cb..000000000 --- a/src/libfreeswan/atoul.c +++ /dev/null @@ -1,88 +0,0 @@ -/* - * convert from ASCII form of unsigned long to binary - * Copyright (C) 1998, 1999 Henry Spencer. - * - * This library is free software; you can redistribute it and/or modify it - * under the terms of the GNU Library General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/lgpl.txt>. - * - * This library is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public - * License for more details. - */ -#include "internal.h" -#include "freeswan.h" - -/* - - atoul - convert ASCII substring to unsigned long number - */ -const char * /* NULL for success, else string literal */ -atoul(src, srclen, base, resultp) -const char *src; -size_t srclen; /* 0 means strlen(src) */ -int base; /* 0 means figure it out */ -unsigned long *resultp; -{ - const char *stop; - static char hex[] = "0123456789abcdef"; - static char uchex[] = "0123456789ABCDEF"; - int d; - char c; - char *p; - unsigned long r; - unsigned long rlimit; - int dlimit; - - if (srclen == 0) - srclen = strlen(src); - if (srclen == 0) - return "empty string"; - - if (base == 0 || base == 13) { - if (srclen > 2 && *src == '0' && CIEQ(*(src+1), 'x')) - return atoul(src+2, srclen-2, 16, resultp); - if (srclen > 1 && *src == '0' && base != 13) - return atoul(src+1, srclen-1, 8, resultp); - return atoul(src, srclen, 10, resultp); - } - if (base != 8 && base != 10 && base != 16) - return "unsupported number base"; - - r = 0; - stop = src + srclen; - if (base == 16) { - while (src < stop) { - c = *src++; - p = strchr(hex, c); - if (p != NULL) - d = p - hex; - else { - p = strchr(uchex, c); - if (p == NULL) - return "non-hex-digit in hex number"; - d = p - uchex; - } - r = (r << 4) | d; - } - /* defer length check to catch invalid digits first */ - if (srclen > sizeof(unsigned long) * 2) - return "hex number too long"; - } else { - rlimit = ULONG_MAX / base; - dlimit = (int)(ULONG_MAX - rlimit*base); - while (src < stop) { - c = *src++; - d = c - '0'; - if (d < 0 || d >= base) - return "non-digit in number"; - if (r > rlimit || (r == rlimit && d > dlimit)) - return "unsigned-long overflow"; - r = r*base + d; - } - } - - *resultp = r; - return NULL; -} |