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|
/******************************************************************************
** $Id: macros.c,v 2.26 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
**
******************************************************************************/
#include <bibtool/general.h>
#include <bibtool/symbols.h>
#include <bibtool/error.h>
#include <bibtool/macros.h>
#include <bibtool/sbuffer.h>
#include "config.h"
/*****************************************************************************/
/* Internal Programs */
/*===========================================================================*/
/*****************************************************************************/
/* External Programs */
/*===========================================================================*/
/*---------------------------------------------------------------------------*/
static Macro macros = MacroNULL; /* */
/*-----------------------------------------------------------------------------
** Function: new_macro()
** Purpose: Allocate a new macro structure and fill it with initial values.
** Upon failure an error is raised and |exit()| is called.
** Arguments:
** name Name of the macro. This must be a symbol.
** val The value of the macro. This must be a symbol.
** next The next pointer of the |Macro| structure.
** count The initial reference count.
** Returns: The new |Macro|.
**___________________________________________________ */
Macro new_macro(name,val,next,count) /* */
Uchar *name; /* */
Uchar *val; /* */
int count; /* */
Macro next; /* */
{ register Macro new; /* */
/* */
if ( (new=(Macro)malloc(sizeof(SMacro))) == MacroNULL )/* */
{ OUT_OF_MEMORY("Macro"); } /* */
/* */
MacroName(new) = name; /* */
MacroValue(new) = val ; /* */
MacroCount(new) = count; /* */
NextMacro(new) = next; /* */
return(new); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: free_macro()
** Purpose: Free a list of macros. The memory allocated for the
** |Macro| given as argument and all struictures
** reachable via the |NextMacro| pointer are released.
** Arguments:
** mac First Macro to release.
** Returns: nothing
**___________________________________________________ */
void free_macro(mac) /* */
Macro mac; /* */
{ Macro next; /* */
/* */
while (mac) /* */
{ next = NextMacro(mac); /* */
ReleaseSymbol(MacroName(mac)); /* */
ReleaseSymbol(MacroValue(mac)); /* */
free(mac); /* */
mac = next; /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: def_macro()
** Purpose: Define or undefine a macro.
** Arguments:
** name name of the macro.
** val NULL or the value of the new macro
** count initial count for the macro.
** Returns: nothing
**___________________________________________________ */
int def_macro(name,val,count) /* */
Uchar *name; /* */
Uchar *val; /* */
int count; /* */
{ register Macro *mp; /* */
/* */
name = symbol(name); /* */
if ( val ) val = symbol(val); /* */
/* */
for ( mp = ¯os; /* */
*mp != MacroNULL; /* */
mp = &NextMacro(*mp) /* */
) /* */
{ if ( MacroName(*mp) == name ) /* */
{ /* */
if ( val ) /* */
{ MacroValue(*mp) = val; } /* */
else
{ Macro mac = *mp;
*mp = NextMacro(*mp);
free(mac);
}
return 1; /* */
} /* */
} /* */
/* */
if ( val ) /* */
{ macros = new_macro(name,val,macros,count); } /* */
return 0; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: look_macro()
** Purpose: Return the value of a macro if it is defined. This
** value is a symbol.
** If the macro is undefined then |NULL| is returned. In
** this case the value of |add| determines whether or not
** the macro shpould be defined. If it is less than 0
** then no new macros is defined. Otherwise a new macro
** is defined. The value is the empty string and the
** initial reference count is |add|.
** Arguments:
** name The name of the macros to find. This needs not to be a symbol.
** add Initial reference count or indicator that no new macro
** is required.
** Returns: The value or |NULL|.
**___________________________________________________ */
Uchar * look_macro(name,add) /* */
Uchar *name; /* */
int add; /* */
{ register Macro *mp; /* */
/* */
name = symbol(name); /* */
/* */
for ( mp = ¯os; /* */
*mp != MacroNULL; /* */
mp = &NextMacro(*mp) /* */
) /* */
{ if ( MacroName(*mp) == name ) /* */
{ if ( MacroCount(*mp) >= 0 ) /* */
MacroCount(*mp) += add; /* */
return(MacroValue(*mp)); /* */
} /* */
} /* */
if ( add < 0 ) return NULL; /* */
def_macro(name,sym_empty,add); /* */
WARNING3("Macro '",name,"' is undefined."); /* */
return NULL; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: foreach_macro()
** Purpose: Apply a function to each macro in turn. The function
** is called with the name and the value of the macro. If
** it returns |FALSE| then the processing of further
** macros is suppressed.
**
** The function given as argument is called with two
** string arguments. The first is the name of the macro
** and the second is its value. Both are symbols and must
** not be modified in any way.
**
** The order of the enumeration of the macros is
** determined by the implementation. No specific
** assumptions should be made about this order.
** Arguments:
** fct Function to apply to each macro.
** Returns: nothing
**___________________________________________________ */
void foreach_macro(fct) /* */
int (*fct) _ARG((Uchar *,Uchar *)); /* */
{ Macro mac; /* */
for ( mac=macros; /* */
mac != MacroNULL; /* */
mac = NextMacro(mac) ) /* */
{ /* */
if ( MacroValue(mac) && /* */
! (*fct)(MacroName(mac),MacroValue(mac)) )/* */
return; /* */
} /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: dump_mac()
** Purpose: Write macros to a file.
** Arguments:
** fname File name of the target file.
** allp if == 0 only the used macros are written.
** Returns: nothing
**___________________________________________________ */
void dump_mac(fname,allp) /* */
char *fname; /* */
int allp; /* */
{ FILE *file; /* */
register Macro mac; /* */
/* */
if ( *fname == '-' && *(fname+1) == '\0' ) /* */
{ file = stdout; } /* */
else if ( (file=fopen(fname,"w")) == NULL ) /* */
{ ERROR2("File could not be opened: ",fname); /* */
return; /* */
} /* */
/* */
for ( mac=macros; /* */
mac != MacroNULL; /* */
mac = NextMacro(mac) ) /* */
{ if ( MacroCount(mac) > 0 || /* */
( MacroCount(mac) >= 0 && allp) ) /* */
{ if ( MacroName(mac) == MacroValue(mac) ) /* */
{ (void)fprintf(file, /* */
"_string{ %s = %s } used: %d\n",/* */
MacroName(mac), /* */
MacroValue(mac), /* */
MacroCount(mac)); /* */
} /* */
else /* */
{ (void)fprintf(file, /* */
"@STRING{ %s = %s } used: %d\n",/* */
MacroName(mac), /* */
MacroValue(mac), /* */
MacroCount(mac)); /* */
} /* */
} /* */
} /* */
/* */
if ( file != stdout ) (void)fclose(file); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: init_macros()
** Purpose: Initialize some macros from a table defined in the
** configuration file or given as define to the C
** compiler. This function has to be caled to initialize
** the global macros.
**
** Note that this function is for internal purposes
** only. The normal user should call |init_bibtool()|
** instead.
** Arguments: none
** Returns: nothing
**___________________________________________________ */
void init_macros() /* */
{ /* */
#ifdef INITIALIZE_MACROS
register Uchar *name; /* */
register char**wp; /* */
static char *word_list[] = /* */
{ INITIALIZE_MACROS, NULL }; /* */
/* */
for ( wp=word_list; *wp!=NULL; ++wp ) /* */
{ name = symbol((Uchar*)*wp); /* */
def_macro(name,name,-1); /* */
} /* */
#endif
} /*------------------------*/
/*****************************************************************************/
/*** ***/
/*****************************************************************************/
static Macro items = MacroNULL;
/*-----------------------------------------------------------------------------
** Function: def_item()
** Purpose:
**
** Arguments:
** name
** value
** Returns: nothing
**___________________________________________________ */
static void def_item(name,value) /* */
register Uchar * name; /* */
register Uchar * value; /* */
{ /* */
name = symbol(name); /* */
value = symbol(value); /* */
items = new_macro(name,value,items,0); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: def_field_type()
** Purpose: This function adds a printing representation for a
** field name to the used list. The argument is an
** equation of the following form
**
** \textit{type = value}
**
** \textit{type} is translated to lower case and compared
** against the internal representation. \textit{value} is
** printed at the appropriate places instead.
** Arguments:
** s String containing an equation.
** Returns: nothing
**___________________________________________________ */
void def_field_type(s) /* */
Uchar * s; /* */
{ Uchar *name, *val, c; /* */
/* */
while ( *s && !is_allowed(*s) ) ++s; /* */
if ( *s == '\0' ) return; /* */
name = s; /* */
while ( is_allowed(*s) ) ++s; /* */
c = *s; /* */
*s = '\0'; /* */
val = new_Ustring(name); /* */
*s = c; /* */
/* */
{ Uchar * cp; /* */
for ( cp=val; *cp; ++cp ) *cp = ToLower(*cp); /* */
} /* */
/* */
name = symbol(val); /* */
free((char*)val); /* */
/* */
while ( *s && !is_allowed(*s) ) ++s; /* */
if ( *s == '\0' ) return; /* */
val = s; /* */
while ( is_allowed(*s) ) ++s; /* */
c = *s; *s = '\0'; val = symbol(val); *s = c; /* */
/* */
def_item(name,val); /* */
} /*------------------------*/
/*****************************************************************************/
/*** ***/
/*****************************************************************************/
/*-----------------------------------------------------------------------------
** Function: get_mapped_or_cased()
** Purpose:
**
**
** Arguments:
** name
** mac
** type
** Returns:
**___________________________________________________ */
static Uchar * get_mapped_or_cased(name,mac,type) /* */
Uchar *name; /* */
int type; /* */
register Macro mac; /* */
{ static StringBuffer* sb = (StringBuffer*)NULL; /* */
/* */
for ( ; mac != MacroNULL; mac=NextMacro(mac) ) /* */
{ if ( name == MacroName(mac) ) /* */
return MacroValue(mac); /* */
} /* */
/* */
if ( sb == NULL && /* */
(sb=sbopen()) == NULL ) /* */
{ OUT_OF_MEMORY("get_item()"); } /* */
sbrewind(sb); /* */
if ( type == SYMBOL_TYPE_LOWER ) /* */
{ sbputs((char*)name,sb);
}
else
{ /* */
switch ( type ) /* */
{ case SYMBOL_TYPE_CASED: /* */
while ( *name ) /* */
{ if ( is_alpha(*name) ) /* */
{ (void)sbputc(ToUpper(*name),sb); /* */
for ( ++name; is_alpha(*name); ++name) /* */
{ (void)sbputc(*name,sb); } /* */
} /* */
else /* */
{ (void)sbputc(*name,sb); /* */
++name; /* */
} /* */
} /* */
break; /* */
case SYMBOL_TYPE_UPPER: /* */
for ( ; *name; ++name ) /* */
{ (void)sbputc(ToUpper(*name),sb); } /* */
break; /* */
} /* */
} /* */
return (Uchar*)sbflush(sb); /* */
} /*------------------------*/
/*****************************************************************************/
/*** ***/
/*****************************************************************************/
/*-----------------------------------------------------------------------------
** Function: get_item()
** Purpose: Return the print representation of a \BibTeX{} string.
** The appearance is determined by the |items| mapping.
** If no approriate entry is found then |type| is used to
** decide whether the item should be returned as
** uppercase, lowercase or first upper only.
** Arguments:
** name Symbol to get the print representation for.
** type One of the values |SYMBOL_TYPE_UPPER|, |SYMBOL_TYPE_LOWER|, or
** |SYMBOL_TYPE_CASED| as they are defined in |type.h|.
** Returns: A pointer to a static string. This location is reused
** upon the next invocation of this function.
**___________________________________________________ */
Uchar * get_item(name,type) /* */
Uchar *name; /* */
int type; /* */
{ return get_mapped_or_cased(name,items,type); /* */
} /*------------------------*/
/*****************************************************************************/
/*** ***/
/*****************************************************************************/
static Macro keys = MacroNULL; /* */
/*-----------------------------------------------------------------------------
** Function: save_key()
** Purpose:
**
**
** Arguments:
** s
** key
** Returns: nothing
**___________________________________________________ */
void save_key(s,key) /* */
char * s; /* */
char * key; /* */
{ /* */
keys = new_macro(s,key,keys,1); /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: get_key_name()
** Purpose:
**
**
** Arguments:
** s
** Returns:
**___________________________________________________ */
Uchar * get_key_name(s) /* */
Uchar *s; /* */
{ return get_mapped_or_cased(s,keys,SYMBOL_TYPE_LOWER);/* */
} /*------------------------*/
|
