INI file read-write C + +

#include <windows.h>
#include <stdio.h>
int Getprivateprofileint (char *ckey, char *cfield, int ndefault,char *filename)
{
int nret = Ndefault;
Char str[1024], ctmp[200], *pc=null;
FILE *fp=null;
int nlen,len=0;
if (!ckey | |!cfield) return nret;

if (fp = fopen (filename, "r")) = = NULL) return nret;
str[0]= ' + ';
sprintf (CTMP, "[%s]", ckey);
while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
if ((str[len-1]>=0x21) && (str[len-1]<=0x7e)) str[len]=0;
else str[len-1] = 0;

if (str[0] = = '; ' | | str[0] = = ' + ') continue;

if (_strnicmp (str, Ctmp,strlen (CTMP))! = 0) Continue;

while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
if ((str[len-1]>=0x21) && (str[len-1]<=0x7e)) str[len]=0;
else str[len-1] = 0;
if (str[0] = = '; ' | | str[0] = = ' + ') continue;
if (str[0] = = ' [') break;
PC = Strstr (str, "=");
if (PC = = NULL) continue;
if ((PC-STR) < 1) continue;
if (_strnicmp (Cfield, str, pc-str) = = 0)
{
len = strlen (str)-1;
if ((PC-STR) < Len) {
NLEN=SSCANF (pc+1, "0x%x", &nret);
if (nlen==0) nlen=sscanf (pc+1, "0X%x", &nret);
if (nlen==0) nlen=sscanf (pc+1, "%d", &nret);
}
Break
}
}
Break
}
Fclose (FP);
return nret;
}

DWORD getprivateprofilestring (Char *ckey, Char *cfield, char *cdefault,char *cret,dword Dretlen,char *filename)
{
Char str[1024], ctmp[200], *pc=null;
FILE *fp=null;
DWORD len=0;

Cret[0] = 0;
if (Cdefault) strcpy (Cret, Cdefault);
if (!ckey | |!cfield) return 0;

if (fp = fopen (filename, "r")) = = NULL) return 0;
str[0]= ' + ';
sprintf (CTMP, "[%s]", ckey);
while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
if ((str[len-1]>=0x21) && (str[len-1]<=0x7e)) str[len]=0;
else str[len-1] = 0;
if (str[0] = = '; ' | | str[0] = = ' + ') continue;
if (_stricmp (str, CTMP)! = 0) Continue;
while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
if ((str[len-1]>=0x21) && (str[len-1]<=0x7e)) str[len]=0;
else str[len-1] = 0;
if (str[0] = = '; ' | | str[0] = = ' + ') continue;
if (str[0] = = ' [') break;
PC = Strstr (str, "=");
if (PC = = NULL) continue;
if ((PC-STR) < 1) continue;
if (_strnicmp (Cfield, str, pc-str) = = 0)
{
Len = strlen (pc+1);
if (Len < Dretlen) strcpy (CRET, PC + 1);
Break
}
}
Break
}
Fclose (FP);
Return (strlen (CRET)-1);
}

int FindKey (char *ckey, char *filename)
{
int nfind = 0;
Char str[1024], ctmp[100];
FILE *fp=null;
DWORD Nlen;
DWORD Nhlen;
int len=0;
int lastpos = 0;
if (!ckey) return nfind;

if (fp = fopen (filename, "r")) = = NULL) return nfind;
Nlen = GetFileSize (Filename,&nhlen);
if (nlen <= 0) {fclose (FP); return nfind;}

 str[0]= ' + ';
 sprintf (CTMP, "[%s]", ckey);
 while (fgets (str, 1024x768, FP))
 {
  len = strlen (str);
  str[len-1] = 0;
  if (str[0]! = '; ' && str[0]! = ' + ')
  {   
    if (nfind==0)
   {
    if (_stricmp (str, cTmp) = = 0) {
      nfind = 1;
    }
   }
   else
   {
    if (str[0] = = ' [')
     {
     break;
    }
   }
  }
  lastpos = Ftell (FP);
 }
 fclose (FP);
 return Nfind;
}

void *cbuf (unsigned int nSize)
{
void *m_paddr;
int m_nlen = nSize;
M_PADDR = NULL;
if ((M_nlen) > 0)
{
M_PADDR = malloc (nSize);
if (!M_PADDR) {
(M_nlen) = 0;
return NULL;
}
memset (m_paddr, 0, sizeof (nSize));
}
return (M_PADDR);
}

BOOL Writeprivateprofileint (Char *ckey, char *cfield, int nvalue,char *filename)
{

FILE *fp=null;
int Len, Newlen,hinewlen;
Char str[1024], cnewstr[200], ctmp[100], *pc=null;
void *m_paddr;

int nfind = 0;
int nfindnextkey = 0;
Char tmpstr[100];

if (!ckey | |!cfield) return FALSE;
sprintf (Cnewstr, "%s=%d\n", Cfield, Nvalue);
sprintf (CTMP, "[%s]", ckey);
if (! FindKey (ckey, filename))
{
if (fp = fopen (filename, "a +") = = NULL) return FALSE;
fprintf (FP, "\n[%s]\n", Ckey);
fprintf (FP, "%s", CNEWSTR);
Fclose (FP);
return TRUE;
}

if (fp = fopen (filename, "r+") = = NULL) return FALSE;
Newlen = GetFileSize (filename, (unsigned long *) &hinewlen) + strlen (cnewstr) +1000;
M_paddr=cbuf (Newlen);
if (m_paddr==null) return FALSE;

while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
Str[len-1] = 0;
strcat ((char *) m_paddr, str);
strcat (char *) m_paddr, "\ n");
if (_stricmp (str, cTmp) = = 0) break;
}

while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
Str[len-1] = 0;
if (str[0] = = ' + ') continue;
if (str[0] = = ' [' && _stricmp (str, CTMP))
{
Nfindnextkey = 1;
Break
}
PC = Strstr (str, "=");
if (PC && (PC-STR) >=1)
{
memset (tmpstr, 0, 100);
strncpy (Tmpstr, str, PC-STR);
}
if (PC && (pc-str) >= 1 && _stricmp (Cfield, tmpstr) = = 0)
{
Nfind = 1;
strcat ((char *) m_paddr, CNEWSTR);
}
Else
{
strcat ((char *) m_paddr, str);
strcat (char *) m_paddr, "\ n");
}
}
if (Nfind = = 0)
{
strcat ((char *) m_paddr, CNEWSTR);
strcat (char *) m_paddr, "\ n");
}

if (Nfindnextkey)
{
strcat (char *) m_paddr, "\ n");
strcat ((char *) m_paddr, str);
strcat (char *) m_paddr, "\ n");
while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
Str[len-1] = 0;
strcat ((char *) m_paddr, str);
strcat (char *) m_paddr, "\ n");
}
}
Fclose (FP);

fp = fopen (filename, "w+");
Fwrite (M_paddr, strlen (char*) m_paddr), 1, FP);
Fclose (FP);
Free (M_PADDR);
return TRUE;
}

BOOL writeprivateprofilestring (Char *ckey, Char *cfield, char *cvalue,char *filename)
{

 file *fp=null;
 int Len, Newlen,hinewlen;
 char str[1024], cnewstr[200], ctmp[100], *pc=null;
 void *m_paddr;
 int nfind = 0;
 int nfindnextkey = 0;
 char tmpstr[100];
 if (!ckey | |!cfield) return FALSE;
 sprintf (cnewstr, "%s=%s\n", Cfield, Cvalue);
 sprintf (CTMP, "[%s]", ckey);
 if (! FindKey (ckey, filename))
 {
  if ((fp = fopen (filename, "a +") = = NULL) return FALSE;
  fprintf (FP, "\n[%s]\n", Ckey);
  fprintf (FP, "%s", CNEWSTR);
  fclose (FP);
  return TRUE;
 }

if (fp = fopen (filename, "r+") = = NULL) return FALSE;
Newlen = GetFileSize (filename, (unsigned long *) &hinewlen) + strlen (cnewstr) +1000;
M_paddr=cbuf (Newlen);
if (m_paddr==null) return FALSE;
while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
Str[len-1] = 0;
strcat ((char *) m_paddr, str);
strcat (char *) m_paddr, "\ n");
if (_stricmp (str, cTmp) = = 0) break;
}

while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
Str[len-1] = 0;
if (str[0] = = ' + ') continue;
if (str[0] = = ' [' && _stricmp (str, CTMP))
{
Nfindnextkey = 1;
Break
}
PC = Strstr (str, "=");
if (PC && (PC-STR) >=1)
{
memset (tmpstr, 0, 100);
strncpy (Tmpstr, str, PC-STR);
}
if (PC && (pc-str) >= 1 && _stricmp (Cfield, tmpstr) = = 0)
{
Nfind = 1;
strcat ((char *) m_paddr, CNEWSTR);
}
Else
{
strcat ((char *) m_paddr, str);
strcat (char *) m_paddr, "\ n");
}
}
if (Nfind = = 0)
{
strcat ((char *) m_paddr, CNEWSTR);
strcat (char *) m_paddr, "\ n");
}

if (Nfindnextkey)
{
strcat (char *) m_paddr, "\ n");
strcat ((char *) m_paddr, str);
strcat (char *) m_paddr, "\ n");
while (Fgets (str, 1024x768, FP))
{
len = strlen (str);
Str[len-1] = 0;
strcat ((char *) m_paddr, str);
strcat (char *) m_paddr, "\ n");
}
}
Fclose (FP);

fp = fopen (filename, "w+");
Fwrite (M_paddr, strlen (char*) m_paddr), 1, FP);
Fclose (FP);
Free (M_PADDR);
return TRUE;
}

INI file read-write C + +