mirror of
https://github.com/nillerusr/source-engine.git
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293 lines
6.2 KiB
C++
293 lines
6.2 KiB
C++
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// SYS_SCRIPTLIB.CPP
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//
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//
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//=====================================================================================//
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#include "vxconsole.h"
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char g_sys_token[MAXTOKEN];
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char* g_sys_scriptbuff;
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char* g_sys_scriptptr;
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char* g_sys_scriptendptr;
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int g_sys_scriptsize;
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int g_sys_scriptline;
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bool g_sys_endofscript;
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bool g_sys_tokenready;
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int g_sys_oldscriptline;
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char* g_sys_oldscriptptr;
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//-----------------------------------------------------------------------------
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// Sys_FreeScriptFile
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//
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//-----------------------------------------------------------------------------
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void Sys_FreeScriptFile(void)
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{
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if (g_sys_scriptbuff)
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{
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Sys_Free(g_sys_scriptbuff);
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g_sys_scriptbuff = NULL;
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}
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}
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//-----------------------------------------------------------------------------
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// Sys_LoadScriptFile
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//
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//-----------------------------------------------------------------------------
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void Sys_LoadScriptFile(const char* filename)
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{
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g_sys_scriptsize = Sys_LoadFile(filename,(void **)&g_sys_scriptbuff);
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Sys_ResetParser();
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}
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//-----------------------------------------------------------------------------
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// Sys_SetScriptData
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//
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//-----------------------------------------------------------------------------
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void Sys_SetScriptData(const char* data, int length)
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{
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g_sys_scriptbuff = (char *)data;
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g_sys_scriptsize = length;
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Sys_ResetParser();
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}
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//-----------------------------------------------------------------------------
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// Sys_UnGetToken
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//
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//-----------------------------------------------------------------------------
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void Sys_UnGetToken(void)
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{
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g_sys_tokenready = true;
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}
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//-----------------------------------------------------------------------------
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// Sys_GetToken
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//
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//-----------------------------------------------------------------------------
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char* Sys_GetToken(bool crossline)
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{
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char* tokenptr;
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if (g_sys_tokenready)
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{
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g_sys_tokenready = false;
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return (g_sys_token);
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}
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g_sys_token[0] = '\0';
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if (g_sys_scriptptr >= g_sys_scriptendptr)
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{
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g_sys_endofscript = true;
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return (NULL);
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}
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skipspace:
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while (*g_sys_scriptptr <= ' ')
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{
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if (g_sys_scriptptr >= g_sys_scriptendptr)
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{
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g_sys_endofscript = true;
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return (NULL);
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}
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if (*g_sys_scriptptr++ == '\n')
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{
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if (!crossline)
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{
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// unexpected newline at g_sys_scriptline
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return (NULL);
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}
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g_sys_scriptline++;
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}
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}
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if (g_sys_scriptptr >= g_sys_scriptendptr)
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{
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g_sys_endofscript = true;
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return (NULL);
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}
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// skip commented line
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if ((g_sys_scriptptr[0] == ';') || (g_sys_scriptptr[0] == '/' && g_sys_scriptptr[1] == '/'))
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{
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if (!crossline)
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{
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// unexpected newline at g_sys_scriptline
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return (NULL);
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}
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while (*g_sys_scriptptr++ != '\n')
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{
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if (g_sys_scriptptr >= g_sys_scriptendptr)
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{
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g_sys_endofscript = true;
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return (NULL);
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}
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}
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g_sys_scriptline++;
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goto skipspace;
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}
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tokenptr = g_sys_token;
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if (g_sys_scriptptr[0] == '\"' && g_sys_scriptptr[1])
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{
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// copy quoted token
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do
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{
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*tokenptr++ = *g_sys_scriptptr++;
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if (g_sys_scriptptr == g_sys_scriptendptr)
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break;
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if (tokenptr == &g_sys_token[MAXTOKEN])
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{
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// token too large
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return NULL;
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}
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}
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while (*g_sys_scriptptr >= ' ' && *g_sys_scriptptr != '\"');
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if (g_sys_scriptptr[0] == '\"')
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*tokenptr++ = *g_sys_scriptptr++;
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}
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else
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{
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// copy token
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while (*g_sys_scriptptr > ' ' && *g_sys_scriptptr != ';' && *g_sys_scriptptr != '\"')
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{
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*tokenptr++ = *g_sys_scriptptr++;
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if (g_sys_scriptptr == g_sys_scriptendptr)
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break;
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if (tokenptr == &g_sys_token[MAXTOKEN])
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{
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// token too large
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return NULL;
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}
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}
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}
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*tokenptr = '\0';
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return (g_sys_token);
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}
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//-----------------------------------------------------------------------------
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// Sys_SkipRestOfLine
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//
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//-----------------------------------------------------------------------------
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void Sys_SkipRestOfLine(void)
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{
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while (*g_sys_scriptptr++ != '\n')
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{
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if (g_sys_scriptptr >= g_sys_scriptendptr)
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{
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break;
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}
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}
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g_sys_scriptline++;
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// flush any queued token
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g_sys_tokenready = false;
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}
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//-----------------------------------------------------------------------------
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// Sys_TokenAvailable
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//
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// Returns (TRUE) if token available on line.
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//-----------------------------------------------------------------------------
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bool Sys_TokenAvailable (void)
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{
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char* ptr;
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ptr = g_sys_scriptptr;
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while (*ptr <= ' ')
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{
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if (ptr >= g_sys_scriptendptr)
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{
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g_sys_endofscript = true;
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return (false);
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}
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if (*ptr++ == '\n')
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return (false);
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}
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return (true);
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}
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//-----------------------------------------------------------------------------
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// Sys_EndOfScript
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//
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// Returns (TRUE) at end of script
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//-----------------------------------------------------------------------------
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bool Sys_EndOfScript(void)
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{
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if (g_sys_scriptptr >= g_sys_scriptendptr)
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{
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g_sys_endofscript = true;
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return (true);
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}
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return (false);
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}
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//-----------------------------------------------------------------------------
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// Sys_ResetParser
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//
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//-----------------------------------------------------------------------------
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void Sys_ResetParser(void)
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{
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g_sys_scriptptr = g_sys_scriptbuff;
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g_sys_scriptendptr = g_sys_scriptptr + g_sys_scriptsize;
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g_sys_scriptline = 1;
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g_sys_endofscript = false;
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g_sys_tokenready = false;
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}
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//-----------------------------------------------------------------------------
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// Sys_SaveParser
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//
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//-----------------------------------------------------------------------------
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void Sys_SaveParser(void)
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{
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g_sys_oldscriptline = g_sys_scriptline;
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g_sys_oldscriptptr = g_sys_scriptptr;
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}
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//-----------------------------------------------------------------------------
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// Sys_RestoreParser
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//
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//-----------------------------------------------------------------------------
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void Sys_RestoreParser(void)
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{
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g_sys_scriptline = g_sys_oldscriptline;
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g_sys_scriptptr = g_sys_oldscriptptr;
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g_sys_tokenready = false;
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}
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//-----------------------------------------------------------------------------
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// Sys_StripQuotesFromToken
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//
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//-----------------------------------------------------------------------------
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void Sys_StripQuotesFromToken( char *pToken )
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{
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int len;
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len = strlen( pToken );
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if ( len >= 2 && pToken[0] == '\"' )
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{
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memcpy( pToken, pToken+1, len-1 );
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pToken[len-2] = '\0';
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}
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}
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