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/******************************************************************************
** $Id: entry.c,v 2.22 1997/12/06 22:56:00 gerd Exp gerd $
**=============================================================================
**
** This file is part of BibTool.
** It is distributed under the GNU General Public License.
** See the file COPYING for details.
**
** (c) 1996-2002 Gerd Neugebauer
**
** Net: gene@gerd-neugebauer.de
**
**-----------------------------------------------------------------------------
** Description:
** This module contains functions which deal with entry types.
** Right from the beginning only the special record types are
** known. Those special record types are |@Comment|, |@Preamble|,
** |@String|, |@Include|, |@Modify|, and |@Alias|.
**
** In addition to those special records the user can define
** additional record types which are denoted as ``normal''. E.g.\
** usually |@Article| and |@Book| are defined which are
** ``normal'' record types.
**
** The record types are are managed in this module. In the other
** modules only numerical representations are used. This module
** provides means to map those numerical ids to the string
** representation and back. It is also possible to define
** additional record types.
**
** Part of this module is likely to be integrated into databases.
******************************************************************************/
#include <bibtool/general.h>
#include <bibtool/symbols.h>
#include <bibtool/entry.h>
#include <bibtool/error.h>
#include "config.h"
/*****************************************************************************/
/* Internal Programs */
/*===========================================================================*/
#ifdef __STDC__
#define _ARG(A) A
#else
#define _ARG(A) ()
#endif
static int match _ARG((Uchar *s,Uchar *t)); /* entry.c */
/*****************************************************************************/
/* External Programs */
/*===========================================================================*/
/*****************************************************************************/
/*** ***/
/*****************************************************************************/
#define EntrySizeIncrement 8
Uchar **entry_type;
static int entry_ptr = 0;
static int entry_size = 0;
/*-----------------------------------------------------------------------------
** Function: init_entries()
** Purpose: Predefine some entry types which are stored at startup time
** in an array. The following entry types are predefined
** because they are considered special by \BibTeX:
** \begin{description}
** \item [BIB\_STRING] denotes a \BibTeX{} macro definition.
** \item [BIB\_PREAMBLE] denotes a preamble item which goes
** before the bibligraphy environment.
** \item [BIB\_COMMENT] denotes a comment entry which is
** passed to the output file.
** \item [BIB\_ALIAS] denotes an alias entry which renames an
** existing entry.
** \item [BIB\_MODIFY] denotes a modification request which
** alters an existing entry.
** \item [BIB\_INCLUDE] denotes an include request which reads
** in another \BibTeX{} file.
** \end{description}
** Note that this function is for internal purposes
** only. The normal user should call |init_bibtool()|
** instead.
** Arguments: none
** Returns: nothing
**___________________________________________________ */
void init_entries() /* */
{ /* */
#ifdef INITIALIZE_BIBTEX_ENTRIES
static char *word_list[] = /* default entry types. */
{ INITIALIZE_BIBTEX_ENTRIES, NULL }; /* Mark the end with NULL */
register char**wp; /* */
#endif
/* */
def_entry_type((Uchar*)"STRING" ); /* */
def_entry_type((Uchar*)"PREAMBLE"); /* */
def_entry_type((Uchar*)"COMMENT" ); /* */
def_entry_type((Uchar*)"ALIAS" ); /* */
def_entry_type((Uchar*)"MODIFY" ); /* */
def_entry_type((Uchar*)"INCLUDE" ); /* */
#ifdef INITIALIZE_BIBTEX_ENTRIES
for ( wp=word_list; *wp!=NULL; ++wp ) /* add compiled in types. */
{ def_entry_type((Uchar*)(*wp)); } /* */
#endif
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: def_entry_type()
** Purpose: Dynamically define an entry type. If the entry type
** already exists then a new printing representation is
** stored.
**
** If no memory is left then an error is raised and the
** program is termined
** Arguments:
** s String containing the name of the entry.
** Returns: nothing
**___________________________________________________ */
void def_entry_type(s) /* */
Uchar *s; /* */
{ int i; /* */
/* */
for (i=0; i<entry_ptr; ++i) /* */
{ /* */
if ( case_cmp(s,EntryName(i)) ) /* */
{ free(EntryName(i)); /* */
EntryName(i) = new_Ustring(s); /* */
return; /* */
} /* */
} /* */
/* */
if ( entry_ptr <= entry_size ) /* */
{ entry_size += EntrySizeIncrement; /* */
entry_type = ( entry_ptr == 0 /* */
? (Uchar**)malloc((size_t)(entry_size*sizeof(Uchar*)))
: (Uchar**)realloc((char*)entry_type,
(size_t)(entry_size*sizeof(Uchar*)))
); /* */
if ( entry_type == (Uchar**)NULL ) /* */
{ OUT_OF_MEMORY("entry type"); } /* */
} /* */
entry_type[entry_ptr++] = new_Ustring(s); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: match()
** Purpose: Compare two strings ignoring case.
** Return TRUE iff they are identical or the second string is a
** substring not followed by a letter or digit.
** Arguments:
** s First string
** t Second string
** Returns:
**___________________________________________________ */
static int match(s,t) /* */
register Uchar *s; /* */
register Uchar *t; /* */
{ /* */
while( *t ) /* */
{ if ( ToLower(*s) != ToLower(*t) ) return(FALSE);/* */
s++; t++; /* */
} /* */
return( is_alpha(*s) || is_digit(*s) ? FALSE : TRUE );/* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: find_entry_type()
** Purpose: Look up an entry type in the array of defined entries.
** Arguments:
** s String of the potential entry name.
** Returns: The index in the array or |NOOP|.
**___________________________________________________ */
int find_entry_type(s) /* */
Uchar *s; /* */
{ int i; /* */
/* */
for (i=0; i<entry_ptr; ++i) /* */
{ if ( match(s,EntryName(i)) ) /* */
{ return(i); } /* */
} /* */
return BIB_NOOP; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: get_entry_type()
** Purpose: Get the printable string representation corresponding
** to the numerical entry type given as argument. If no
** entry type is defined for the given index then |NULL|
** is returned.
** Arguments:
** idx Index of entry type.
** Returns: Print representation of the entry type or |NULL|.
**___________________________________________________ */
Uchar * get_entry_type(idx) /* */
int idx; /* */
{ /* */
return (idx<0||idx>=entry_ptr ? NULL : EntryName(idx));/* */
} /*------------------------*/
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