128 lines
2.8 KiB
C++
128 lines
2.8 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1997.
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//
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// File: N C I P A D D R . C P P
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//
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// Contents: WCHAR support for Winsock inet_ functions.
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//
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// Notes:
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//
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// Author: shaunco 24 Mar 1997
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//
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//----------------------------------------------------------------------------
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#include <pch.h>
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#pragma hdrstop
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#include "ncipaddr.h"
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VOID
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IpHostAddrToPsz(
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IN DWORD dwAddr,
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OUT PWSTR pszBuffer)
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{
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BYTE* pb = (BYTE*)&dwAddr;
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static const WCHAR c_szIpAddr [] = L"%d.%d.%d.%d";
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wsprintfW (pszBuffer, c_szIpAddr, pb[3], pb[2], pb[1], pb[0]);
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}
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DWORD
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IpPszToHostAddr(
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IN PCWSTR cp)
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{
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DWORD val, base, n;
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WCHAR c;
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DWORD parts[4], *pp = parts;
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again:
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// Collect number up to ``.''.
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// Values are specified as for C:
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// 0x=hex, 0=octal, other=decimal.
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//
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val = 0; base = 10;
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if (*cp == L'0')
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{
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base = 8, cp++;
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}
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if (*cp == L'x' || *cp == L'X')
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{
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base = 16, cp++;
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}
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while (c = *cp)
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{
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if ((c >= L'0') && (c <= L'9'))
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{
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val = (val * base) + (c - L'0');
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cp++;
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continue;
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}
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if ((base == 16) &&
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( ((c >= L'0') && (c <= L'9')) ||
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((c >= L'A') && (c <= L'F')) ||
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((c >= L'a') && (c <= L'f')) ))
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{
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val = (val << 4) + (c + 10 - (
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((c >= L'a') && (c <= L'f'))
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? L'a'
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: L'A' ) );
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cp++;
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continue;
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}
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break;
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}
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if (*cp == L'.')
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{
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// Internet format:
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// a.b.c.d
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// a.b.c (with c treated as 16-bits)
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// a.b (with b treated as 24 bits)
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//
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if (pp >= parts + 3)
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{
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return (DWORD) -1;
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}
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*pp++ = val, cp++;
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goto again;
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}
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// Check for trailing characters.
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//
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if (*cp && (*cp != L' '))
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{
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return 0xffffffff;
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}
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*pp++ = val;
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// Concoct the address according to
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// the number of parts specified.
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//
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n = pp - parts;
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switch (n)
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{
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case 1: // a -- 32 bits
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val = parts[0];
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break;
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case 2: // a.b -- 8.24 bits
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val = (parts[0] << 24) | (parts[1] & 0xffffff);
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break;
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case 3: // a.b.c -- 8.8.16 bits
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val = (parts[0] << 24) | ((parts[1] & 0xff) << 16) |
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(parts[2] & 0xffff);
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break;
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case 4: // a.b.c.d -- 8.8.8.8 bits
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val = (parts[0] << 24) | ((parts[1] & 0xff) << 16) |
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((parts[2] & 0xff) << 8) | (parts[3] & 0xff);
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break;
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default:
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return 0xffffffff;
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}
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return val;
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}
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