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/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

#include "config.h"

#include <ctype.h>

#include "object.h"

#include "hash.h"

#include "name.h"

#include "type.h"

#include "utility.h"

#include "variable.h"

/*

    STANDARD FLAGS

    These flags are set by the command-line options and determine the

    action of the program.

*/

boolean allow_long_long = 0 ;

boolean force_output = 0 ;

boolean local_input = 0 ;

boolean restrict_depth = 1 ;

boolean restrict_use = 0 ;

boolean unique_names = 0 ;

int verbose = 0 ;

/*

    INPUT AND OUTPUT DIRECTORIES

    The variable input_dir consists of a colon-separated list of directories

    to be searched for input files.  output_incl_dir and output_src_dir

    give respectively the output include and output source directories.

    The lengths of these directory names (plus one) are also given.

*/

char *input_dir = INPUT_DIR ;

char *output_incl_dir = INCLUDE_DIR ;

char *output_src_dir = SRC_DIR ;

int output_incl_len = ( int ) sizeof ( INCLUDE_DIR ) ;

int output_src_len = ( int ) sizeof ( SRC_DIR ) ;

/*

    FIND THE BASENAME OF A FILE NAME

    This routine returns the basename (i.e. just the final component) of

    the filename nm.

*/

char *basename

    PROTO_N ( ( nm ) )

    PROTO_T ( char *nm )

{

    char *b = nm ;

    for ( ; *nm ; nm++ ) {

	if ( *nm == '/' ) b = nm + 1 ;

    }

    return ( b ) ;

}

/*

    FIND THE DIRECTORY COMPONENT OF A FILE NAME

    This routine returns a copy of the directory component of the filename

    nm.

*/

char *dirname

    PROTO_N ( ( nm ) )

    PROTO_T ( char *nm )

{

    char *p, *end = null ;

    char *dir = string_copy ( nm ) ;

    for ( p = dir ; *p ; p++ ) {

	if ( *p == '/' ) end = p ;

    }

    if ( end == null || end == dir ) return ( null ) ;

    *end = 0 ;

    return ( dir ) ;

}

/*

    FIND A RELATIVE PATHNAME

    This routine prints the relative pathname from the file from to the

    file to, ignoring the first n characters.

*/

char *relative

    PROTO_N ( ( from, to, n ) )

    PROTO_T ( char *from X char *to X int n )

{

    char *s = buffer ;

    if ( from == null ) return ( to ) ;

    if ( to == null ) return ( from ) ;

    for ( from = from + n; *from ; from++ ) {

	if ( *from == '/' ) {

	    IGNORE strcpy ( s, "../" ) ;

	    s += 3 ;

	}

    }

    IGNORE strcpy ( s, to + n ) ;

    return ( buffer ) ;

}

/*

    HACK A NAME

    This routine hacks the name nm according to the given key.

*/

char *hack_name

    PROTO_N ( ( nm, key ) )

    PROTO_T ( char *nm X char *key )

{

    char *p = string_copy ( nm ), *q ;

    for ( q = p ; *q ; q++ ) {

	char c = *q ;

	if ( isalpha ( c ) && isupper ( c ) ) {

	    /* The second letter of key maps upper case letters */

	    if ( key [1] == 'a' ) *q = ( char ) tolower ( c ) ;

	} else if ( isalpha ( c ) && islower ( c ) ) {

	    /* The third letter of key maps lower case letters */

	    if ( key [2] == 'A' ) *q = ( char ) toupper ( c ) ;

	} else if ( isdigit ( c ) ) {

	    /* The fourth letter of key maps digits */

	    *q = ( char ) ( c - '0' + key [3] ) ;

	} else if ( strchr ( key + 4, c ) ) {

	    /* The rest of key gives special characters */

	} else {

	    /* The first letter of key is the default */

	    *q = key [0] ;

	}

    }

    return ( p ) ;

}

/*

    FIND A TOKEN NAME

    This routine makes up a token name for an object named nm.  If

    unique_names is false this is just nm, otherwise it is prefixed by

    a string depending on the current input file.

*/

char *token_name

    PROTO_N ( ( nm ) )

    PROTO_T ( char *nm )

{

    if ( strneq ( nm, HIDDEN_NAME, HIDDEN_LEN ) ) {

	nm = string_concat ( "~", nm + HIDDEN_LEN ) ;

    }

    if ( unique_names && crt_object ) {

	info *i = crt_object->u.u_info ;

	char *pfx = i->prefix ;

	if ( pfx == null ) {

	    pfx = token_prefix ( i->api, i->file, i->subset ) ;

	    i->prefix = pfx ;

	}

	if ( *pfx ) return ( string_printf ( "%s.%s", pfx, nm ) ) ;

    }

    return ( nm ) ;

}

/*

    FIND TOKEN PREFIX

    This routine finds the token prefix for the API subset api:file:subset.

*/

char *token_prefix

    PROTO_N ( ( api, file, subset ) )

    PROTO_T ( char *api X char *file X char *subset )

{

    UNUSED ( subset ) ;

    if ( unique_names ) {

	int n ;

	if ( file == null ) return ( api ) ;

	IGNORE sprintf ( buffer, "%s.%s", api, basename ( file ) ) ;

	n = ( int ) strlen ( buffer ) - 2 ;

	if ( n >= 0 && buffer [n] == '.' ) buffer [n] = 0 ;

	return ( hack_name ( buffer, "_Aa0." ) ) ;

    }

    return ( null ) ;

}

/*

    FIND A SUBSET NAME

    This routine finds the name associated with the API subset with API

    api, header file and subset subset.

*/

char *subset_name

    PROTO_N ( ( api, file, subset ) )

    PROTO_T ( char *api X char *file X char *subset )

{

    char *sn ;

    if ( subset ) {

	char *f = ( file ? file : "" ) ;

	sn = string_printf ( "%s:%s:%s", api, f, subset ) ;

    } else if ( file ) {

	sn = string_printf ( "%s:%s", api, file ) ;

    } else {

	sn = string_printf ( "%s", api ) ;

    }

    return ( sn ) ;

}

/*

    FIND AN INCLUDE OUTPUT FILE NAME

    This routine finds the include output file name for the API subset

    api:file:subset using the directory dir as a base.

*/

char *include_name

    PROTO_N ( ( dir, api, file, subset ) )

    PROTO_T ( char *dir X char *api X char *file X char *subset )

{

    char *nm ;

    if ( subset ) {

	char s [20] ;

	IGNORE strncpy ( s, subset, 18 ) ;

	s [ OUTPUT_LENGTH ] = 0 ;

	nm = string_printf ( OUTPUT_SUBSET, dir, api, s ) ;

    } else if ( file ) {

	nm = string_printf ( OUTPUT_FILE, dir, api, file ) ;

    } else {

	nm = string_printf ( OUTPUT_API, dir, api ) ;

    }

    return ( nm ) ;

}

/*

    FIND A SOURCE OUTPUT FILE NAME

    This routine finds the source output file name for the API subset

    api:file:subset using the directory dir as a base.

*/

char *src_name

    PROTO_N ( ( dir, api, file, subset ) )

    PROTO_T ( char *dir X char *api X char *file X char *subset )

{

    char *nm ;

    if ( subset ) {

	char s [20] ;

	IGNORE strncpy ( s, subset, 18 ) ;

	s [ OUTPUT_LENGTH ] = 0 ;

	nm = string_printf ( SOURCE_SUBSET, dir, api, s ) ;

    } else if ( file ) {

	int n ;

	nm = string_printf ( SOURCE_FILE, dir, api, basename ( file ) ) ;

	n = ( int ) strlen ( nm ) - 4 ;

	if ( n >= 0 && streq ( nm + n, ".h.c" ) ) {

	    IGNORE strcpy ( nm + n, ".c" ) ;

	}

    } else {

	nm = string_printf ( SOURCE_API, dir, api ) ;

    }

    return ( nm ) ;

}

/*

    FIND A MACRO NAME

    This routine finds the protection (or other) macro for the API subset

    api:file:subset using the macro prefix pfx.

*/

char *macro_name

    PROTO_N ( ( pfx, api, file, subset ) )

    PROTO_T ( char *pfx X char *api X char *file X char *subset )

{

    if ( subset ) {

	char *f = ( file ? file : "" ) ;

	IGNORE sprintf ( buffer, "%s_%s_%s_%s", pfx, api, f, subset ) ;

    } else if ( file ) {

	IGNORE sprintf ( buffer, "%s_%s_%s", pfx, api, file ) ;

    } else {

	IGNORE sprintf ( buffer, "%s_%s", pfx, api ) ;

    }

    return ( hack_name ( buffer, "_AA0" ) ) ;

}

/*

    FIND A DECLARATION BLOCK NAME

    This routine finds the declaration block name for the API subset

    api:file:subset.

*/

char *block_name

    PROTO_N ( ( api, file, subset ) )

    PROTO_T ( char *api X char *file X char *subset )

{

    char * pfx = ( subset ? "subset" : "api" ) ;

    if ( file ) {

	int len;

	IGNORE sprintf ( buffer, "%s__%s__%s", pfx, api, file ) ;

	/* remove any trailing ".h" */

	len = ( int ) strlen ( buffer ) ;

	if ( streq ( buffer + len - 2, ".h" ) )

	    buffer [ len - 2 ] = '\0' ;

    } else {

	IGNORE sprintf ( buffer, "%s__%s", pfx, api ) ;

    }

    return ( hack_name ( buffer, "_Aa0" ) ) ;

}