1 files changed, 100 insertions, 0 deletions
diff --git a/vhdlparser/vhdlstring.h b/vhdlparser/vhdlstring.h
new file mode 100644
index 0000000..16e1d9a
--- /dev/null
+++ b/vhdlparser/vhdlstring.h
@@ -0,0 +1,100 @@
+#ifndef VHDLSTRING_H
+#define VHDLSTRING_H
+
+#include <stdio.h>
+#include <string.h>
+
+/** @brief Minimal string class with std::string like behaviour that fulfills the JavaCC
+ *  string requirements.
+ */
+class VhdlString
+{
+  public:
+    VhdlString()
+    {
+      init();
+    }
+    VhdlString(const VhdlString &other)
+    {
+      m_str = (char*)malloc(other.m_len+1);
+      memcpy(m_str,other.m_str,other.m_len);
+      m_len = other.m_len;
+      m_str[m_len]=0;
+    }
+    VhdlString &operator=(const VhdlString &other)
+    {
+      if (this!=&other)
+      {
+        free(m_str);
+        m_str = (char*)malloc(other.m_len+1);
+        memcpy(m_str,other.m_str,other.m_len);
+        m_len = other.m_len;
+        m_str[m_len]=0;
+      }
+      return *this;
+    }
+    VhdlString(const char *s)
+    {
+      m_len = strlen(s);
+      m_str=(char*)malloc(m_len+1);
+      memcpy(m_str,s,m_len+1);
+    }
+    VhdlString(const char *s,int size)
+    {
+      m_str = (char*)malloc(size+1);
+      memcpy(m_str,s,size);
+      m_str[size]=0;
+      m_len=size;
+    }
+   ~VhdlString()
+    {
+      delete[] m_str;
+    }
+    VhdlString& append(const char *s,int size)
+    {
+      int oldlen = m_len;
+      m_len+=size+1;
+      if (m_len)
+      {
+        m_str = (char*)realloc(m_str,m_len);
+        memcpy(m_str+oldlen,s,m_len-oldlen-1);
+        m_str[m_len-1]=0;
+      }
+      return *this;
+    }
+    VhdlString& append(const char *s)
+    {
+      return append(s,strlen(s));
+    }
+    VhdlString& append(const VhdlString &other)
+    {
+      return append(other.m_str,other.m_len);
+    }
+    VhdlString substr(int pos=0,int len=-1)
+    {
+      return VhdlString(m_str?m_str+pos:0,len==-1?m_len-pos:m_len);
+    }
+    int copy(char *s,int len,int pos=0) const
+    {
+      if (len==0) return 0;
+      if (pos>=m_len) { s[0]=0; return 0; }
+      int r=m_len<pos+len ? m_len-pos : len;
+      memcpy(s,m_str+pos,r);
+      return r;
+    }
+    const char *c_str() const           { return m_str; }
+    const char *data() const            { return m_str; }
+    int         size() const            { return m_len; }
+    int         length() const          { return m_len; }
+    char &      operator[](int i)       { return m_str[i]; }
+    const char &operator[](int i) const { return m_str[i]; }
+    void        clear()                 { free(m_str); init(); }
+    VhdlString  operator+=(char c)      { char s[2]; s[0]=c; s[1]=0; return append(s); }
+
+  private:
+    void init() { m_str=(char*)calloc(1,1); m_len=0; }
+    char *m_str;
+    int   m_len;
+};
+
+#endif