StringDBAdd.c

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#include                <stdlib.h>
#include                <string.h>
#include                "libFireBird.h"
 
dword StringDBAdd(tStringDB *StringDB, char *Text)
{
  TRACEENTER();
 
  char                 *p;
  dword                 ret;
 
  if(!StringDB || !Text)
  {
    TRACEEXIT();
    return 0;
  }
 
  p = StringDB->DB;
  while(p < StringDB->DBEnd)
  {
    if(!strcmp(p, Text))
    {
      ret = (dword)p - (dword)StringDB->DB;
 
      TRACEEXIT();
      return ret;
    }
 
    p += (strlen(p) + 1);
  }
 
  if(((StringDB->DBEnd - StringDB->DB) + strlen(Text) + 2) > StringDB->DBSize)
  {
    int                 NewStringDBSize;
    char               *NewStringDB;
 
    if(StringDB->DBSize == 0)
      NewStringDBSize = 2 * strlen(Text);
    else
      NewStringDBSize = StringDB->DBSize + 4096;
 
    NewStringDB = TAP_MemAlloc(NewStringDBSize);
    if(!NewStringDB)
    {
      TRACEEXIT();
      return 0;
    }
 
    memset(NewStringDB, 0, NewStringDBSize);
    memcpy(NewStringDB, StringDB->DB, StringDB->DBSize);
    TAP_MemFree(StringDB->DB);
 
    StringDB->DBPtr = StringDB->DBPtr - StringDB->DB + NewStringDB;
    StringDB->DBEnd = StringDB->DBEnd - StringDB->DB + NewStringDB;
 
    StringDB->DB = NewStringDB;
    StringDB->DBSize = NewStringDBSize;
  }
  p = StringDB->DBEnd;
  strcpy(StringDB->DBEnd, Text);
  StringDB->DBEnd = StringDB->DBEnd + strlen(Text) + 1;
  ret = (dword)p - (dword)StringDB->DB;
 
  TRACEEXIT();
  return ret;
}