diff options
Diffstat (limited to 'sid/sidplay-libs-2.1.0/libsidutils/src/ini/headings.i')
| -rw-r--r-- | sid/sidplay-libs-2.1.0/libsidutils/src/ini/headings.i | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/sid/sidplay-libs-2.1.0/libsidutils/src/ini/headings.i b/sid/sidplay-libs-2.1.0/libsidutils/src/ini/headings.i new file mode 100644 index 00000000..11833a99 --- /dev/null +++ b/sid/sidplay-libs-2.1.0/libsidutils/src/ini/headings.i @@ -0,0 +1,346 @@ +/*************************************************************************** + 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; +} |