139 lines
2.6 KiB
C++
139 lines
2.6 KiB
C++
//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=====================================================================================//
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#include "platform.h"
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#include "filesystem.h"
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#include "filesystem_helpers.h"
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#include "characterset.h"
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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// wordbreak parsing set
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static characterset_t g_BreakSet, g_BreakSetIncludingColons;
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static void InitializeCharacterSets()
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{
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static bool s_CharacterSetInitialized = false;
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if (!s_CharacterSetInitialized)
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{
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CharacterSetBuild( &g_BreakSet, "{}()'" );
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CharacterSetBuild( &g_BreakSetIncludingColons, "{}()':" );
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s_CharacterSetInitialized = true;
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}
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}
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const char* ParseFile( const char* pFileBytes, char* pToken, bool* pWasQuoted, characterset_t *pCharSet )
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{
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if (pWasQuoted)
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*pWasQuoted = false;
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if (!pFileBytes)
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return 0;
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InitializeCharacterSets();
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// YWB: Ignore colons as token separators in COM_Parse
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static bool com_ignorecolons = false;
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characterset_t& breaks = pCharSet ? *pCharSet : (com_ignorecolons ? g_BreakSet : g_BreakSetIncludingColons);
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int c;
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int len = 0;
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pToken[0] = 0;
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// skip whitespace
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skipwhite:
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while ( (c = *pFileBytes) <= ' ')
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{
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if (c == 0)
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return 0; // end of file;
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pFileBytes++;
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}
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// skip // comments
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if (c=='/' && pFileBytes[1] == '/')
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{
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while (*pFileBytes && *pFileBytes != '\n')
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pFileBytes++;
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goto skipwhite;
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}
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// skip c-style comments
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if (c=='/' && pFileBytes[1] == '*' )
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{
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// Skip "/*"
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pFileBytes += 2;
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while ( *pFileBytes )
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{
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if ( *pFileBytes == '*' &&
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pFileBytes[1] == '/' )
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{
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pFileBytes += 2;
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break;
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}
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pFileBytes++;
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}
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goto skipwhite;
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}
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// handle quoted strings specially
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if (c == '\"')
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{
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if (pWasQuoted)
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*pWasQuoted = true;
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pFileBytes++;
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while (1)
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{
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c = *pFileBytes++;
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if (c=='\"' || !c)
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{
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pToken[len] = 0;
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return pFileBytes;
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}
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pToken[len] = c;
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len++;
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}
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}
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// parse single characters
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if ( IN_CHARACTERSET( breaks, c ) )
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{
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pToken[len] = c;
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len++;
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pToken[len] = 0;
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return pFileBytes+1;
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}
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// parse a regular word
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do
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{
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pToken[len] = c;
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pFileBytes++;
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len++;
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c = *pFileBytes;
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if ( IN_CHARACTERSET( breaks, c ) )
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break;
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} while (c>32);
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pToken[len] = 0;
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return pFileBytes;
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}
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char* ParseFile( char* pFileBytes, char* pToken, bool* pWasQuoted )
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{
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return (char*)ParseFile( (const char*)pFileBytes, pToken, pWasQuoted );
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}
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