/*************************************************************************
 *
 * HTCd - Copyright (C) 1998-2006 Henrik Rydberg
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <mt/mstring.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <stdarg.h>

uniheap<ms_mincaps> mstring::heap;

///////////////////////////////////////////////////////////////////

mstring::mstring() : sref(heap.push(),0),caps(ms_mincaps) {
  map[dim]=0;
}
mstring::mstring(int n) : sref(heap.push(),0),caps(ms_mincaps) {
  if(caps<n) { while(caps<n) caps<<=1; heap.pop(map); map=(char*)malloc(caps); }
  map[dim=0]=0;
}
mstring::mstring(int n,char c) : sref(heap.push(),0),caps(ms_mincaps) {
  resize(n);
  memset(map,c,dim);
}
mstring::mstring(const char* s) : sref(heap.push(),0),caps(ms_mincaps) {
  resize(strlen(s));
  memcpy(map,s,dim);
}
mstring::mstring(const char* s,int n) : sref(heap.push(),0),caps(ms_mincaps) {
  resize(n);
  memcpy(map,s,dim);
}
mstring::mstring(const sref& s) : sref(heap.push(),0),caps(ms_mincaps) {
  resize(s.size());
  memcpy(map,s.data(),dim);
}
mstring::mstring(const mstring& s) : sref(heap.push(),0),caps(ms_mincaps) {
  resize(s.dim);
  memcpy(map,s.map,dim);
}
mstring::~mstring() {
  if(caps==ms_mincaps) heap.pop(map);
  else free(map);
}

///////////////////////////////////////////////////////////////////

void mstring::erase(int pos,int n)
{
  if(pos<0) { pos+=dim; if(pos<0) pos=0; }
  if(pos<dim) {
    if(n<0) { n+=dim+1; if(n<0) n=0; }
    if(n>=dim-pos) map[dim=pos]=0;
    else { memmove(map+pos,map+pos+n,dim-pos-n); map[dim-=n]=0; }
  }
}

void mstring::reserve(int n) {
  if(caps<=n) {
    if(caps==ms_mincaps) {
      while(caps<=n) caps<<=1;
      char* p=(char*)memcpy(malloc(caps),map,dim);
      heap.pop(map);
      map=p;
    }
    else {
      while(caps<=n) caps<<=1;
      map=(char*)realloc(map,caps);
    }
  }
}

///////////////////////////////////////////////////////////////////

int mstring::load(const mstring& path)
{
  int fd=open(path.c_str(),O_RDONLY);
  if(fd<0) return -1;
  struct stat fs; fstat(fd,&fs);
  resize(fs.st_size);
  read(fd,map,dim);
  close(fd);
  return dim;
}

///////////////////////////////////////////////////////////////////

mstring& mstring::convert(const char* format,...)
{
  sref_t buf;
  va_list ap;
  va_start(ap,format);
  resize(vsprintf(buf,format,ap));
  memcpy(map,buf,dim);
  va_end(ap);
  return *this;
}

///////////////////////////////////////////////////////////////////

int swrite::appc(char c) { return mp->put(c),1; }
int swrite::apps(const sref& s) { return mp->put(s),s.size(); }

///////////////////////////////////////////////////////////////////

int mswrite::appc(char c) { return m.put(c),1; }
int mswrite::apps(const sref& s) { return m.put(s),s.size(); }

///////////////////////////////////////////////////////////////////

int merror_t::appc(char c) { return desc.put(c),1; }
int merror_t::apps(const sref& s) { return desc.put(s),s.size(); }

///////////////////////////////////////////////////////////////////

void getline(mstring& m,FILE* fp,char end)
{
  m.clear();
  int c=getc(fp);
  while(c!=end&&c!=EOF) { m.append(1,c); c=getc(fp); }
}