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git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@625 212acab6-be3b-0410-9dea-997c60f758d6

Source/lineparse.h

@@ -0,0 +1,150 @@
+#ifndef _LINEPARSE_H_
+#define _LINEPARSE_H_
+
+class LineParser {
+  public:
+
+    LineParser()
+    {
+      m_nt=m_eat=0;
+      m_tokens=0;
+    }
+
+    ~LineParser()
+    {
+      freetokens();
+    }
+
+    int parse(char *line) // returns -1 on error
+    {
+      freetokens();
+      int n=doline(line);
+      if (n) return n;
+      if (m_nt) 
+      {
+        m_tokens=(char**)malloc(sizeof(char*)*m_nt);
+        n=doline(line);
+        if (n) 
+        {
+          freetokens();
+          return -1;
+        }
+      }
+      return 0;
+    }
+
+    int getnumtokens() { return m_nt-m_eat; }
+
+    void eattoken() { m_eat++; }
+
+    double gettoken_float(int token, int *success=0)
+    {
+      token+=m_eat;
+      if (token < 0 || token >= m_nt) 
+      {
+        if (success) *success=0;
+        return 0.0;
+      }
+      if (success)
+      {
+        char *t=m_tokens[token];
+        *success=*t?1:0;
+        while (*t) 
+        {
+          if ((*t < '0' || *t > '9')&&*t != '.') *success=0;
+          t++;
+        }
+      }
+      return atof(m_tokens[token]);
+    }
+    int gettoken_int(int token, int *success=0) 
+    { 
+      token+=m_eat;
+      if (token < 0 || token >= m_nt || !m_tokens[token][0]) 
+      {
+        if (success) *success=0;
+        return 0;
+      }
+      char *tmp;
+      int l;
+      if (m_tokens[token][0] == '-') l=strtol(m_tokens[token],&tmp,0);
+      else l=(int)strtoul(m_tokens[token],&tmp,0);
+      if (success) *success=! (int)(*tmp);
+      return l;
+    }
+    char *gettoken_str(int token) 
+    { 
+      token+=m_eat;
+      if (token < 0 || token >= m_nt) return "";
+      return m_tokens[token]; 
+    }
+    int gettoken_enum(int token, const char *strlist) // null seperated list
+    {
+      int x=0;
+      char *tt=gettoken_str(token);
+      if (tt && *tt) while (*strlist)
+      {
+        if (!stricmp(tt,strlist)) return x;
+        strlist+=strlen(strlist)+1;
+        x++;
+      }
+      return -1;
+    }
+  private:
+    void freetokens()
+    {
+      if (m_tokens)
+      {
+        int x;
+        for (x = 0; x < m_nt; x ++)
+          free(m_tokens[x]);
+        free(m_tokens);
+      }
+      m_tokens=0;
+      m_nt=0;
+    }
+
+    int doline(char *line)
+    {
+      m_nt=0;
+      while (*line == ' ' || *line == '\t') line++;
+      while (*line) 
+      {
+        int lstate=0; // 1=", 2=`, 4='
+        if (*line == ';' || *line == '#') break;
+        if (*line == '\"') lstate=1;
+        else if (*line == '\'') lstate=2;
+        else if (*line == '`') lstate=4;
+        if (lstate) line++;
+        int nc=0;
+        while (*line)
+        {
+          if (lstate==1 && *line =='\"') break;
+          if (lstate==2 && *line =='\'') break;
+          if (lstate==4 && *line =='`') break;
+          if (!lstate && (*line == ' ' || *line == '\t')) break;
+          line++;
+          nc++;
+        }
+        if (m_tokens)
+        {
+          m_tokens[m_nt]=(char*)malloc(nc+1);
+          strncpy(m_tokens[m_nt],line-nc,nc);
+          m_tokens[m_nt][nc]=0;
+        }
+        m_nt++;
+        if (lstate)
+        {
+          if (*line) line++;
+          else return -2;
+        }
+        while (*line == ' ' || *line == '\t') line++;
+      }
+      return 0;
+    }
+    
+    int m_eat;
+    int m_nt;
+    char **m_tokens;
+};
+#endif//_LINEPARSE_H_