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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 "filename.h"

#include "list.h"

#include "external.h"

#include "flags.h"

#include "startup.h"

#include "suffix.h"

#include "utility.h"

/*

    CASE SENSITIVITY FLAG

    This flag may be set to true to make tcc ignore case in filename

    suffixes.

*/

boolean case_insensitive = 0 ;

/*

    IS A CHARACTER UPPER CASE?

    This macro checks whether the character C is upper case.  It is ASCII

    dependent.

*/

#define is_upper_case( C )	( ( C ) >= 'A' && ( C ) <= 'Z' )

/*

    CONVERT A STRING TO LOWER CASE

    This routine converts the string s to lower case.

*/

static void to_lower_case

    PROTO_N ( ( s ) )

    PROTO_T ( char *s )

{

    char c ;

    while ( c = *s, c != 0 ) {

	if ( is_upper_case ( c ) ) {

	    *s = ( char ) ( c - 'A' + 'a' ) ;

	}

	s++ ;

    }

    return ;

}

/*

    SUFFIX OVERRIDES

    This table contains the strings which are used when the suffix

    overrides are set from the command line.  Initially, it is

    empty.  This table needs to be kept in step with Table 1.

*/

char *suffixes [ TYPE_ARRAY_SIZE ] = {

    null,	/* C_SOURCE */

    null,	/* PREPROC_C */

    "cpp",	/* CPP_SOURCE */

    null,	/* PREPROC_CPP */

    null,	/* INDEP_TDF */

    null,	/* DEP_TDF */

    null,	/* AS_SOURCE */

    null,	/* BINARY_OBJ */

    null,	/* EXECUTABLE */

    null,	/* PRETTY_TDF */

    null,	/* PL_TDF */

    null,	/* TDF_ARCHIVE */

    null,	/* MIPS_G_FILE */

    null,	/* MIPS_T_FILE */

    null,	/* C_SPEC */

    null,	/* CPP_SPEC */

    null,  	/* ERROR_FILE */

    null,	/* STARTUP_FILE */

    null,	/* UNKNOWN_TYPE */

    null,	/* INDEP_TDF_COMPLEX (dummy type) */

    null,	/* C_SPEC_1 (dummy type) */

    null,	/* C_SPEC_2 (dummy type) */

    null,	/* INDEP_TDF_AUX (dummy type) */

    null	/* BINARY_OBJ_AUX (dummy type) */

} ;

/*

    FILE STORAGE LOCATIONS

    Output files may be stored either in the temporary directory, tempdir,

    or the work directory, workdir.

*/

char *tempdir = null ;

char *workdir = null  ;

/*

    FIND THE BASE NAME OF A FILE

    This routine returns the basename of the file name s.

*/

char *find_basename

    PROTO_N ( ( s ) )

    PROTO_T ( char *s )

{

    char *r = s ;

    for ( ; *s ; s++ ) {

	if ( *s == '/' ) r = s + 1 ;

    }

    return ( r ) ;

}

/*

    FIND THE FULL NAME OF A FILE

    This routine returns the full name of the file name s.

*/

char *find_fullname

    PROTO_N ( ( s ) )

    PROTO_T ( char *s )

{

    static char *pwd = null ;

    if ( *s == '/' ) return ( s ) ;

    if ( pwd == null ) {

	if ( get_cwd ( buffer, buffer_size ) ) {

	    pwd = string_concat ( buffer, "/" ) ;

	} else {

	    error ( WARNING, "Can't determine current working directory" ) ;

	    pwd = "" ;

	}

    }

    return ( string_concat ( pwd, s ) ) ;

}

/*

    SPLIT OFF THE SUFFIX OF A FILE NAME

    This routine splits the file name s into two part, the base part and

    the file suffix, and returns the latter.

*/

static char *split_name

    PROTO_N ( ( s ) )

    PROTO_T ( char *s )

{

    int i, n = ( int ) strlen ( s ) ;

    for ( i = n - 1 ; i >= 0 ; i-- ) {

	if ( s [i] == '.' ) {

	    s [i] = 0 ;

	    if ( case_insensitive ) {

		/* Allow for case insensitive systems */

		to_lower_case ( s + ( i + 1 ) ) ;

	    }

	    return ( s + ( i + 1 ) ) ;

	}

    }

    return ( "" ) ;

}

/*

    CREATE A NEW FILENAME

    This routine allocates a new filename structure.

*/

static filename *new_filename

    PROTO_Z ()

{

    static int no_free = 0 ;

    static filename *free_objs = null ;

    if ( no_free == 0 ) {

	no_free = 1000 ;

	free_objs = alloc_nof ( filename, no_free ) ;

    }

    return ( free_objs + ( --no_free ) ) ;

}

/*

    ADD A FILENAME TO A LIST

    This routine joins the two filename lists, p and q, returning the

    result.

*/

filename *add_filename

    PROTO_N ( ( p, q ) )

    PROTO_T ( filename *p X filename *q )

{

    filename *r ;

    if ( p == null ) return ( q ) ;

    if ( q == null ) return ( p ) ;

    for ( r = p ; r->next != null ; r = r->next ) /* empty */ ;

    r->next = q ;

    return ( p ) ;

}

/*

    CONVERT A KEY LETTER TO A FILE TYPE

    This routine converts the letter s, which can be a file suffix (if

    suff is true), or a stage identifier (otherwise), to a file type.

    This routine needs to be kept in step with Table 1 and Table 2.

*/

int find_type

    PROTO_N ( ( s, suff ) )

    PROTO_T ( int s X int suff )

{

    switch ( s ) {

	case C_SOURCE_KEY : return ( C_SOURCE ) ;

	case PREPROC_C_KEY : return ( PREPROC_C ) ;

	case CPP_SOURCE_KEY : return ( CPP_SOURCE ) ;

	case PREPROC_CPP_KEY : return ( PREPROC_CPP ) ;

	case AS_SOURCE_KEY : return ( AS_SOURCE ) ;

	case BINARY_OBJ_KEY : return ( BINARY_OBJ ) ;

	case C_SPEC_KEY : return ( C_SPEC ) ;

	case CPP_SPEC_KEY : return ( CPP_SPEC ) ;

    }

    if ( !checker ) {

	switch ( s ) {

	    case INDEP_TDF_KEY : return ( INDEP_TDF ) ;

	    case DEP_TDF_KEY : return ( DEP_TDF ) ;

	    case PRETTY_TDF_KEY : return ( PRETTY_TDF ) ;

	}

    }

    if ( suff ) return ( DEFAULT_TYPE ) ;

    switch ( s ) {

	case MIPS_G_FILE_KEY : return ( MIPS_G_FILE ) ;

	case MIPS_T_FILE_KEY : return ( MIPS_T_FILE ) ;

	case STARTUP_FILE_KEY : return ( STARTUP_FILE ) ;

	case ALL_KEY : return ( ALL_TYPES ) ;

    }

    if ( !checker ) {

	switch ( s ) {

	    case PL_TDF_KEY : return ( PL_TDF ) ;

	    case TDF_ARCHIVE_KEY : return ( TDF_ARCHIVE ) ;

	}

    }

    error ( WARNING, "Unknown file type, '%c'", ( unsigned char ) s ) ;

    return ( UNKNOWN_TYPE ) ;

}

/*

    FIND A FILE SUFFIX

    This routine converts a file type, t, into the corresponding file

    suffix.  It needs to be kept in step with Table 1 and Table 2.

*/

static char *file_suffix

    PROTO_N ( ( t ) )

    PROTO_T ( int t )

{

    static char suff [3] ;

    suff [0] = 0 ;

    suff [1] = 0 ;

    suff [2] = 0 ;

    switch ( t ) {

	case C_SOURCE : suff [0] = C_SOURCE_KEY ; break ;

	case PREPROC_C : suff [0] = PREPROC_C_KEY ; break ;

	case CPP_SOURCE : suff [0] = CPP_SOURCE_KEY ; break ;

	case PREPROC_CPP : suff [0] = PREPROC_CPP_KEY ; break ;

	case INDEP_TDF : suff [0] = INDEP_TDF_KEY ; break ;

	case INDEP_TDF_AUX : {

	    suff [0] = INDEP_TDF_KEY ;

	    suff [1] = EXTRA_KEY ;

	    break ;

	}

	case DEP_TDF : suff [0] = DEP_TDF_KEY ; break ;

	case AS_SOURCE : suff [0] = AS_SOURCE_KEY ; break ;

	case BINARY_OBJ : suff [0] = BINARY_OBJ_KEY ; break ;

	case BINARY_OBJ_AUX : {

	    if ( ( use_sparc_cc == 1 ) && use_system_cc ) {

		suff [0] = '.' ;

		suff [1] = BINARY_OBJ_KEY ;

	    } else {

		suff [0] = BINARY_OBJ_AUX_KEY ;

	    }

	    break ;

	}

	case PRETTY_TDF : suff [0] = PRETTY_TDF_KEY ; break ;

	case PL_TDF : suff [0] = PL_TDF_KEY ; break ;

	case MIPS_G_FILE : suff [0] = MIPS_G_FILE_KEY ; break ;

	case MIPS_T_FILE : suff [0] = MIPS_T_FILE_KEY ; break ;

	case C_SPEC : suff [0] = C_SPEC_KEY ; break ;

	case CPP_SPEC : suff [0] = CPP_SPEC_KEY ; break ;

    }

    if ( suff [0] ) {

	if ( case_insensitive && is_upper_case ( suff [0] ) ) {

	    /* Make allowances for case insensitive systems */

	    to_lower_case ( suff ) ;

	    suff [1] = suff [0] ;

	}

	return ( suff ) ;

    }

    error ( SERIOUS, "Illegal file type" ) ;

    return ( file_suffix ( DEFAULT_TYPE ) ) ;

}

/*

    NEXT FILENAME IS ACTUALLY AN INPUT OPTION

    Some command-line options, for example, system libraries, are treated

    like input files.  This flag is set to indicate that the next input

    file is actually an input option.

*/

boolean option_next = 0 ;

/*

    COUNT OF NUMBER OF INPUT FILES

    The number of calls to find_filename is recorded.  Input options are

    excluded from this count.

*/

int no_input_files = 0 ;

/*

    ALLOCATE A NEW UNIQUE IDENTIFIER

    Each file is assigned a unique number which identifies it and all the

    files derived from it.  This macro assigns a new unique number.

*/

static int uniq_no = 0 ;

#define new_unique()	( uniq_no++ )

/*

    CREATE A FILENAME FROM A PATHNAME

    This routine creates a new filename structure, corresponding to the

    file with name s and type t.  If t is UNKNOWN_TYPE then the actual

    file type is deduced from the file suffix.  This routine needs to

    be kept in step with Table 1, Table 2 and Table 3.

*/

filename *find_filename

    PROTO_N ( ( s, t ) )

    PROTO_T ( char *s X int t )

{

    filename *p = new_filename () ;

    char *b = string_copy ( find_basename ( s ) ) ;

    char *e = split_name ( b ) ;

    int i ;

    /* Find the file type */

    if ( suffix_overrides && t == UNKNOWN_TYPE ) {

	for ( i = 0 ; i < TYPE_ARRAY_SIZE ; i++ ) {

	    if ( suffixes [ i ] != null && streq ( e, suffixes [ i ] ) ) {

		if ( checker ) {

		    if ( i == PL_TDF || i == TDF_ARCHIVE ) continue ;

		}

		t = i ;

		break ;

	    }

	}

    }

    if ( t == UNKNOWN_TYPE ) {

	if ( e [0] ) {

	    if ( e [1] ) {

		if ( e [2] ) {

		    /* Length >= 3 */

		    if ( streq ( e, CPP_2_SUFFIX ) ) {

			t = CPP_SOURCE ;

		    } else if ( streq ( e, PREPROC_CPP_2_SUFFIX ) ) {

			t = PREPROC_CPP ;

		    } else if ( streq ( e, AS_2_SUFFIX ) ) {

			t = AS_SOURCE ;

		    } else {

			t = DEFAULT_TYPE ;

		    }

		} else {

		    /* Length == 2 */

		    if ( e [1] == EXTRA_KEY ) {

			t = find_type ( e [0], 1 ) ;

		    } else if ( streq ( e, CPP_1_SUFFIX ) ) {

			t = CPP_SOURCE ;

		    } else if ( streq ( e, PREPROC_CPP_1_SUFFIX ) ) {

			t = PREPROC_CPP ;

		    } else if ( streq ( e, CPP_SPEC_1_SUFFIX ) ) {

			t = CPP_SPEC ;

		    } else if ( checker ) {

			t = DEFAULT_TYPE ;

		    } else if ( streq ( e, PL_TDF_SUFFIX ) ) {

			t = PL_TDF ;

		    } else if ( streq ( e, TDF_ARCHIVE_SUFFIX ) ) {

			t = TDF_ARCHIVE ;

		    } else {

			t = DEFAULT_TYPE ;

		    }

		}

	    } else {

		/* Length == 1 */

		t = find_type ( e [0], 1 ) ;

	    }

	} else {

	    /* Length == 0 */

	    t = DEFAULT_TYPE ;

	}

    }

    /* Return the result */

    p->name = s ;

    p->bname = b ;

    p->uniq = new_unique () ;

    p->type = t ;

    if ( option_next ) {

	p->storage = INPUT_OPTION ;

	option_next = 0 ;

    } else {

	p->storage = INPUT_FILE ;

	no_input_files++ ;

    }

    p->final = 0 ;

    p->aux = null ;

    p->next = null ;

    return ( p ) ;

}

/*

    FIND WHERE TO STORE FILES OF A GIVEN TYPE

    This routine returns the storage class for files of type t.  Note

    that this may be PRESERVED_FILE which is only a legal storage type

    when it is passed to make_filename (which turns it into OUTPUT_FILE).

*/

int where

    PROTO_N ( ( t ) )

    PROTO_T ( int t )

{

    if ( !keeps [t] ) return ( TEMP_FILE ) ;

    if ( !stops [t] ) return ( PRESERVED_FILE ) ;

    return ( OUTPUT_FILE ) ;

}

/*

    CREATE A FILENAME FROM ANOTHER FILENAME

    This routine creates a new filename structure by forming the file

    derived from p which has type t and storage s.  This routine needs

    to be kept in step with Table 1 and Table 2.

*/

filename *make_filename

    PROTO_N ( ( p, t, s ) )

    PROTO_T ( filename *p X int t X int s )

{

    boolean f = 0 ;

    char *b, *d, *e ;

    char *nm = null ;

    filename *q = new_filename () ;

    /* Examine the storage class */

    switch ( s ) {

	case INPUT_FILE :

	case INPUT_OPTION : {

	    /* This shouldn't occur */

	    d = null ;

	    break ;

	}

	case OUTPUT_FILE : {

	    /* Check output file name */

	    if ( final_name ) {

		static boolean used_final_name = 0 ;

		if ( used_final_name ) {

		    error ( WARNING, "Can only name one file with '-o'" ) ;

		} else {

		    nm = final_name ;

		    b = find_basename ( nm ) ;

#ifdef EXECUTABLE_SUFFIX

		    if ( t == EXECUTABLE && strchr ( b, '.' ) == null ) {

			/* Add '.exe' suffix if necessary */

			nm = string_concat ( nm, EXECUTABLE_SUFFIX ) ;

			b = string_concat ( b, EXECUTABLE_SUFFIX ) ;

		    }

#endif

		    used_final_name = 1 ;

		    f = 1 ;

		}

	    }

	    d = workdir ;

	    break ;

	}

	case PRESERVED_FILE : {

	    /* Preserved files are turned into output files */

	    d = workdir ;

	    s = OUTPUT_FILE ;

	    break ;

	}

	case TEMP_FILE : {

	    /* Temporary files */

	    d = tempdir ;

	    break ;

	}

	default : {

	    error ( INTERNAL, "Illegal storage type" ) ;

	    d = null ;

	    break ;

	}

    }

    /* Find the file name */

    if ( nm == null ) {

	if ( p != null && p->type == t ) {

	    nm = find_basename ( p->name ) ;

	    if ( d != null ) {

		IGNORE sprintf ( buffer, "%s/%s", d, nm ) ;

		nm = string_copy ( buffer ) ;

	    }

	    b = p->bname ;

	} else if ( s == TEMP_FILE && p != null && !verbose ) {

	    switch ( t ) {

		case BINARY_OBJ_AUX :

		case BINARY_OBJ : break ;

		case C_SPEC : break ;

		case CPP_SPEC : break ;

		case INDEP_TDF_AUX :

		case INDEP_TDF : {

		    if ( make_archive || make_complex || tokdef_name ) {

			break ;

		    }

		    goto default_lab ;

		}

		default :

		default_lab : {

		    b = p->bname ;

		    e = file_suffix ( t ) ;

		    IGNORE sprintf ( buffer, "%s/%s.%s", d, TEMP_NAME, e ) ;

		    nm = string_copy ( buffer ) ;

		    break ;

		}

	    }

	}

    }

    /* Find the file name */

    if ( nm == null ) {

	if ( p == null || make_up_names ) {

	    static int seq = 0 ;

	    IGNORE sprintf ( buffer, MADE_UP_NAME, seq++ ) ;

	    b = string_copy ( buffer ) ;

	} else {

	    b = p->bname ;

	}

	e = file_suffix ( t ) ;

	if ( d == null ) {

	    IGNORE sprintf ( buffer, "%s.%s", b, e ) ;

	} else {

	    IGNORE sprintf ( buffer, "%s/%s.%s", d, b, e ) ;

	}

	nm = string_copy ( buffer ) ;

    }

    /* Fill in the fields of the result */

    SET ( b ) ;

    q->name = nm ;

    q->bname = b ;

    q->uniq = ( p ? p->uniq : new_unique () ) ;

    q->type = t ;

    q->storage = s ;

    q->final = f ;

    q->aux = null ;

    q->next = null ;

    return ( q ) ;

}