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vuParser.cpp

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00001 #include <stdio.h>
00002 #include <stdlib.h>
00003 #include <string.h>
00004 #include "vuParser.h"
00005 
00006 //----------------------------------------------------------------------------
00007 //------------------------- vuParser() ------------------------------------
00008 //----------------------------------------------------------------------------
00009 
00010 vuParser::vuParser()
00011 {
00012     m_Buffer = 0;
00013     m_Pos    = 0;
00014     m_Len    = 0;
00015 }
00016 
00017 //----------------------------------------------------------------------------
00018 //------------------------- ~vuParser() -----------------------------------
00019 //----------------------------------------------------------------------------
00020 
00021 vuParser::~vuParser()
00022 {
00023     if (m_Buffer) delete [] m_Buffer;
00024 }
00025 
00026 //----------------------------------------------------------------------------
00027 //------------------------- protected: readBuffer() ----------------------------
00028 //----------------------------------------------------------------------------
00029 
00030 void vuParser::readBuffer(const char* filename)
00031 {
00032     ifstream ifp;
00033     int len;
00034 
00035 #ifdef IS_NOCREATE_NEEDED
00036     ifp.open(filename, ios::in|ios::binary|ios::nocreate);
00037 #else
00038         // The nocreate is not available on the IRIX boxes that we were compiling
00039         // this code on, so we had to remove this part from
00040     ifp.open(filename, ios::in|ios::binary);
00041 #endif
00042     if (!ifp.is_open()) throw ("Could not open the input file.");
00043 
00044     //Find the length of the file.
00045     ifp.seekg(0, ios::end);
00046     len = ifp.tellg();
00047     ifp.seekg(0, ios::beg);
00048 
00049     if (m_Buffer)
00050         delete [] m_Buffer;
00051     m_Buffer = new char[len+1];
00052     ifp.read(m_Buffer, len);
00053     m_Buffer[len] = 0;
00054     ifp.close();
00055 
00056     m_Pos = 0;
00057 }
00058 
00059 //----------------------------------------------------------------------------
00060 //------------------------- protected: fixBuffer() -----------------------------
00061 //----------------------------------------------------------------------------
00062 
00063 void vuParser::FixBuffer(void)
00064 {
00065     dword i;
00066     dword j;
00067     dword len;
00068     char* tmp;
00069 
00070     i   = 0;
00071     len = 1;
00072     tmp = m_Buffer;
00073     while(tmp[i] != 0)
00074     {
00075         if ((tmp[i]=='{') || (tmp[i]=='}') ||
00076             (tmp[i]=='(') || (tmp[i]==')') ||
00077             (tmp[i]=='[') || (tmp[i]==']') ||
00078             (tmp[i]==',') || (tmp[i]==';'))
00079             len += 3;
00080         else
00081             ++len;
00082         ++i;
00083     }
00084 
00085     m_Buffer = new char[len];
00086     m_Len = len;
00087 
00088     i = 0;
00089     j = 0;
00090     while(tmp[i] != 0)
00091     {
00092         if ((tmp[i]=='{') || (tmp[i]=='}') ||
00093             (tmp[i]=='(') || (tmp[i]==')') ||
00094             (tmp[i]=='[') || (tmp[i]==']') ||
00095             (tmp[i]==',') || (tmp[i]==';'))
00096         {
00097             m_Buffer[j++] = ' ';
00098             m_Buffer[j++] = tmp[i];
00099             m_Buffer[j++] = ' ';
00100         }
00101                 else
00102             m_Buffer[j++] = tmp[i];
00103         ++i;
00104     }
00105 
00106     delete [] tmp;
00107 }
00108 
00109 //----------------------------------------------------------------------------
00110 //------------------------- protected: readToken() -----------------------------
00111 //----------------------------------------------------------------------------
00112 
00113 bool vuParser::readToken(char token, bool eat)
00114 {
00115     int len = 0;
00116     vuString stoken = token;
00117     stoken += " %n";
00118     sscanf(&m_Buffer[m_Pos],stoken,&len);
00119     if (eat) m_Pos += len;
00120     return (len > 0);
00121 }
00122 
00123 //----------------------------------------------------------------------------
00124 //------------------------- protected: finished() ------------------------------
00125 //----------------------------------------------------------------------------
00126 
00127 bool vuParser::finished()
00128 {
00129     return (m_Pos>=m_Len);
00130 }
00131 
00132 //----------------------------------------------------------------------------
00133 //----------------------------------------------------------------------------
00134 // Try to read the static text given by "s" from the buffer
00135 bool vuParser::readString(const char* s)
00136 {
00137     char str[1024];
00138     int ret, len=0;
00139     strcpy(str, s);
00140     strcat(str, "%n");
00141     ret = sscanf(&m_Buffer[m_Pos], str, &len);
00142     if ((ret!=EOF) && (len!=0))
00143     {
00144         m_Pos += len;
00145         return true;
00146     }
00147     return false;
00148 }
00149 
00150 //----------------------------------------------------------------------------
00151 //----------------------------------------------------------------------------
00152 // Try to read a string prefixed by "prefix" from the buffer
00153 bool vuParser::readString(const char* prefix, char* s)
00154 {
00155     char str[1024];
00156     int i=0;
00157     strcpy(str, prefix);
00158     strcat(str, " \"");
00159     if (readString(str))
00160     {
00161         while((m_Buffer[m_Pos]!='"') && m_Buffer[m_Pos])
00162             s[i++] = m_Buffer[m_Pos++];
00163         s[i] = 0;
00164         if (m_Buffer[m_Pos]=='"')
00165         {
00166             ++m_Pos;
00167             return true;
00168         }
00169     }
00170     return false;
00171 }
00172 
00173 //----------------------------------------------------------------------------
00174 //----------------------------------------------------------------------------
00175 // Try to read a number prefixed by "prefix" from the buffer
00176 bool vuParser::readNumber(const char* prefix, float& t)
00177 {
00178     char str[1024];
00179     int ret, len=0;
00180     strcpy(str, prefix);
00181     strcat(str, " %f%n");
00182     ret = sscanf(&m_Buffer[m_Pos], str, (float*)&t, &len);
00183     if ((ret == 1) && (len!=0))
00184     {
00185         m_Pos += len;
00186         return true;
00187     }
00188     return false;
00189 }

Generated on Wed Dec 15 21:20:35 2004 for vuVolume by  doxygen 1.3.9.1