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/***************************************************************************
headings.i - Section Heading Manipulation Functions
-------------------
begin : Fri Apr 21 2000
copyright : (C) 2000 by Simon White
email : s_a_white@email.com
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "headings.h"
/********************************************************************************************************************
* Function : __ini_addHeading
* Parameters : ini - pointer to ini file database. heading - heading name
* Returns : Pointer to new heading.
* Globals Used :
* Globals Modified :
* Description : Adds a new heading to the ini file database and updates the temporary workfile
********************************************************************************************************************
* Rev | Date | By | Comment
* ----------------------------------------------------------------------------------------------------------------
********************************************************************************************************************/
struct section_tag *__ini_addHeading (ini_t *ini, char *heading)
{
struct section_tag *section;
size_t length;
long pos;
// Format heading for storing
__ini_strtrim (heading);
/* Create a backup of the file we are about to edit */
if (ini->write == heading)
return __ini_locateHeading (ini, heading);
// Add new heading to work file and read it in
// using file add
fseek (ini->ftmp, 0, SEEK_END);
fputs ("\n[", ini->ftmp);
pos = ftell (ini->ftmp);
fputs (heading, ini->ftmp);
length = (size_t) (ftell (ini->ftmp) - pos);
section = __ini_faddHeading (ini, ini->ftmp, pos, length);
fseek (ini->ftmp, 0, SEEK_END);
fputs ("]\n", ini->ftmp);
ini->write = section->heading;
return section;
}
/********************************************************************************************************************
* Function : __ini_faddheading
* Parameters : ini - pointer to ini file database, file - ini file to read heading from
* : pos - heading position in file, length - heading length
* Returns : Pointer to new heading.
* Globals Used :
* Globals Modified :
* Description : Adds a new heading to the ini file database from the input file.
********************************************************************************************************************
* Rev | Date | By | Comment
* ----------------------------------------------------------------------------------------------------------------
********************************************************************************************************************/
struct section_tag *__ini_faddHeading (ini_t *ini, FILE *file, long pos, size_t length)
{
struct section_tag *section;
char *str;
if (length)
{
length++;
str = (char *) malloc (sizeof(char) * length);
assert (str);
fseek (file, pos, SEEK_SET);
fgets (str, (int) length, file);
__ini_strtrim (str);
}
else
str = "";
section = __ini_createHeading (ini, str);
// Make sure heading was created
if (!(section || length))
{
free (str);
return NULL;
}
return section;
}
/********************************************************************************************************************
* Function : __ini_createHeading
* Parameters : ini - pointer to ini file database. heading - heading name
* Returns : Pointer to new heading.
* Globals Used :
* Globals Modified :
* Description : Adds an entry into the heading linked list ready for formating by the addHeading commands
********************************************************************************************************************
* Rev | Date | By | Comment
* ----------------------------------------------------------------------------------------------------------------
********************************************************************************************************************/
struct section_tag *__ini_createHeading (ini_t *ini, char *heading)
{
struct section_tag *pNew;
pNew = __ini_locateHeading (ini, heading);
// Check to see if heading already exists
if (!pNew)
{ // Create a new heading;
pNew = (struct section_tag *) malloc (sizeof (struct section_tag));
assert (pNew);
memset (pNew, 0, sizeof (struct section_tag));
pNew->heading = heading;
if (*heading)
{ // Normal case
pNew->pPrev = ini->last;
ini->last = pNew;
if (pNew->pPrev)
pNew->pPrev->pNext = pNew;
else
ini->first = pNew;
}
else
{ // This case must always be first
pNew->pNext = ini->first;
ini->first = pNew;
if (pNew->pNext)
pNew->pNext->pPrev = pNew;
else
ini->last = pNew;
}
#ifdef INI_USE_HASH_TABLE
{ // Rev 1.3 - Added
struct section_tag *pOld;
unsigned long crc32;
unsigned char accel;
crc32 = __ini_createCrc32 (heading, strlen (heading));
pNew->crc = crc32;
// Rev 1.3 - Add accelerator list
accel = (unsigned char) crc32 & 0x0FF;
pNew->pPrev_Acc = NULL;
pOld = ini->sections[accel];
ini->sections[accel] = pNew;
if (pOld) pOld->pPrev_Acc = pNew;
pNew->pNext_Acc = pOld;
}
#endif // INI_USE_HASH_TABLE
}
ini->selected = pNew;
ini->changed = true;
return pNew;
}
/********************************************************************************************************************
* Function : __ini_deleteHeading
* Parameters : ini - pointer to ini file database. heading - heading name
* Returns :
* Globals Used :
* Globals Modified :
* Description : Removes a heading from the database only.
* : This change does not occur in the file until ini_close is called.
********************************************************************************************************************
* Rev | Date | By | Comment
* ----------------------------------------------------------------------------------------------------------------
********************************************************************************************************************/
void __ini_deleteHeading (ini_t *ini)
{
struct section_tag *current_h;
// Delete Heading
current_h = ini->selected;
if (current_h)
{ // Delete Keys
while (current_h->first)
{
current_h->selected = current_h->first;
__ini_deleteKey (ini);
}
// Tidy up all users of this heading
ini->selected = NULL;
if (ini->last == current_h)
ini->last = current_h->pPrev;
// Break heading out of list
if (!current_h->pPrev)
ini->first = current_h->pNext;
else
current_h->pPrev->pNext = current_h->pNext;
if (current_h->pNext)
current_h->pNext->pPrev = current_h->pPrev;
#ifdef INI_USE_HASH_TABLE
// Rev 1.3 - Take member out of accelerator list
if (!current_h->pPrev_Acc)
ini->sections[(unsigned char) current_h->crc & 0x0FF] = current_h->pNext_Acc;
else
current_h->pPrev_Acc->pNext_Acc = current_h->pNext_Acc;
if (current_h->pNext_Acc)
current_h->pNext_Acc->pPrev_Acc = current_h->pPrev_Acc;
#endif // INI_USE_HASH_TABLE
// Delete Heading
if (*current_h->heading)
free (current_h->heading);
free (current_h);
ini->changed = true;
}
}
/********************************************************************************************************************
* Function : __ini_locateHeading
* Parameters : ini - pointer to ini file database. heading - heading name
* Returns : Pointer to heading.
* Globals Used :
* Globals Modified :
* Description : Locates a heading entry in the database.
********************************************************************************************************************
* Rev | Date | By | Comment
* ----------------------------------------------------------------------------------------------------------------
********************************************************************************************************************/
struct section_tag *__ini_locateHeading (ini_t *ini, char *heading)
{
struct section_tag *current_h;
#ifdef INI_USE_HASH_TABLE
// Rev 1.3 - Revised to use new accelerator
unsigned long crc32;
crc32 = __ini_createCrc32 (heading, strlen (heading));
// Search for heading
for (current_h = ini->sections[(unsigned char) crc32 & 0x0FF]; current_h; current_h = current_h->pNext_Acc)
{
if (current_h->crc == crc32)
{
if (!strcmp (current_h->heading, heading))
break;
}
}
#else
// Search for heading
for (current_h = ini->first; current_h; current_h = current_h->pNext)
{
if (!strcmp (current_h->heading, heading))
break;
}
#endif // INI_USE_HASH_TABLE
ini->selected = current_h;
return current_h;
}
/********************************************************************************************************************
* Function : (public) ini_deleteHeading
* Parameters : ini - pointer to ini file descriptor
* Returns : -1 for Error and 0 on success
* Globals Used :
* Globals Modified :
* Description : Equivalent Microsoft write string API call where both data & key are set to NULL.
********************************************************************************************************************/
int INI_LINKAGE ini_deleteHeading (ini_fd_t fd)
{
ini_t *ini = (ini_t *) fd;
if (!ini->selected)
return -1;
// Can't delete a temporary section
if (ini->selected == &(ini->tmpSection))
return -1;
__ini_deleteHeading (ini);
return 0;
}
/********************************************************************************************************************
* Function : (public) ini_locateHeading
* Parameters : fd - pointer to ini file descriptor
* Returns : -1 for Error and 0 on success
* Globals Used :
* Globals Modified :
* Description : Equivalent Microsoft write string API call where both data & key are set to NULL.
********************************************************************************************************************/
int INI_LINKAGE ini_locateHeading (ini_fd_t fd, char *heading)
{
ini_t *ini = (ini_t *) fd;
struct section_tag *section;
if (!heading)
return -1;
section = __ini_locateHeading (ini, heading);
#ifdef INI_ADD_LIST_SUPPORT
// Rev 1.1 - Remove buffered list
if (ini->list)
{
free (ini->list);
ini->list = NULL;
}
#endif // INI_ADD_LIST_SUPPORT
if (section)
return 0;
// Ok no section was found, but maybe the user is wanting to create a
// new one so create it temporarily and see what actually happens later
{
char *p;
size_t length;
// Remove old heading
section = &(ini->tmpSection);
if (section->heading)
free (section->heading);
// Add new heading
length = strlen (heading) + 1;
p = (char *) malloc (length);
if (!p)
return -1;
memcpy (p, heading, length);
section->heading = p;
ini->selected = section;
}
return -1;
}
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