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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"

#if FS_STDARG

#include <stdarg.h>

#else

#include <varargs.h>

#endif

#include "list.h"

#include "flags.h"

#include "main.h"

#include "suffix.h"

#include "utility.h"

/*

    ERROR VARIABLES

    The value exit_status gives the overall status of the program.  It

    can be EXIT_SUCCESS or EXIT_FAILURE.  The variable progname gives

    the name of the program, which is used in error reports.

*/

int exit_status = EXIT_SUCCESS ;

char *progname = PROGNAME_TCC ;

/*

    PRINT AN ERROR MESSAGE

    This routine prints an error message s (a printf-style string,

    which may be followed by any number of arguments) of severity e

    (see utility.h).

*/

void error

    PROTO_V ( ( int e, char *s, ... ) ) /* VARARGS */

{

    va_list args ;

    char *errtype = null ;

#if FS_STDARG

    va_start ( args, s ) ;

#else

    int e ;

    char *s ;

    va_start ( args ) ;

    e = va_arg ( args, int ) ;

    s = va_arg ( args, char * ) ;

#endif

    switch ( e ) {

	case FATAL : {

	    exit_status = EXIT_FAILURE ;

	    errtype = "Fatal" ;

	    break ;

	}

	case INTERNAL : {

	    exit_status = EXIT_FAILURE ;

	    errtype = "Internal" ;

	    break ;

	}

	case SERIOUS : {

	    exit_status = EXIT_FAILURE ;

	    errtype = "Error" ;

	    break ;

	}

	case OPTION : {

	    exit_status = EXIT_FAILURE ;

	    errtype = "Option interpreter" ;

	    break ;

	}

	case WARNING : {

	    if ( !warnings ) {

		va_end ( args ) ;

		return ;

	    }

	    errtype = "Warning" ;

	    break ;

	}

	case INFO : {

	    errtype = "Information" ;

	    break ;

	}

    }

    if ( checker ) progname = PROGNAME_TCHK ;

    IGNORE fprintf ( stderr, "%s: ", progname ) ;

    if ( errtype ) IGNORE fprintf ( stderr, "%s: ", errtype ) ;

    IGNORE vfprintf ( stderr, s, args ) ;

    IGNORE fprintf ( stderr, ".\n" ) ;

    va_end ( args ) ;

    if ( e == FATAL ) main_end () ;

    return ;

}

/*

    PRINT A COMMENT

    This routine prints the comment s (a printf-style string, which

    may be followed by any number of arguments) to the standard output.

*/

void comment

    PROTO_V ( ( int e, char *s, ... ) ) /* VARARGS */

{

    FILE *f ;

    va_list args ;

#if FS_STDARG

    va_start ( args, s ) ;

#else

    int e ;

    char *s ;

    va_start ( args ) ;

    e = va_arg ( args, int ) ;

    s = va_arg ( args, char * ) ;

#endif

    f = ( e ? stdout : stderr ) ;

    IGNORE fflush ( f ) ;

    IGNORE vfprintf ( f, s, args ) ;

    IGNORE fflush ( f ) ;

    va_end ( args ) ;

    return ;

}

/*

    ALLOCATE A BLOCK OF MEMORY

    This routine allocates a block of memory of size sz and returns

    the result.

*/

pointer xalloc

    PROTO_N ( ( sz ) )

    PROTO_T ( int sz )

{

    pointer p = ( pointer ) malloc ( ( size_t ) sz ) ;

    if ( p == null ) error ( FATAL, "Memory allocation error" ) ;

    return ( p ) ;

}

/*

    REALLOCATE A BLOCK OF MEMORY

    This routine reallocates the block of memory p to have size sz.

    xrealloc ( null, sz ) is equivalent to xalloc ( sz ).

*/

pointer xrealloc

    PROTO_N ( ( p, sz ) )

    PROTO_T ( pointer p X int sz )

{

    pointer q ;

    if ( p == null ) return ( xalloc ( sz ) ) ;

    q = ( pointer ) realloc ( p, ( size_t ) sz ) ;

    if ( q == null ) error ( FATAL, "Memory reallocation error" ) ;

    return ( q ) ;

}

/*

    ALLOCATE SPACE FOR A STRING

    This routine allocates n characters of memory for use in the string

    memory allocation routines.

*/

static char *string_alloc

    PROTO_N ( ( n ) )

    PROTO_T ( int n )

{

    char *r ;

    if ( n >= 1000 ) {

	/* Long strings are allocated space by alloc_nof */

	r = alloc_nof ( char, n ) ;

    } else {

	/* Short strings are allocated space from a buffer */

	static int no_free = 0 ;

	static char *free_chars = null ;

	if ( n >= no_free ) {

	    no_free = 4000 ;

	    free_chars = alloc_nof ( char, no_free ) ;

	}

	r = free_chars ;

	no_free -= n ;

	free_chars += n ;

    }

    return ( r ) ;

}

/*

    COPY A STRING

    This routine allocates space for a copy of the string s and copies

    the string into this space.  This copy is returned.

*/

char *string_copy

    PROTO_N ( ( s ) )

    PROTO_T ( char *s )

{

    int n = ( int ) strlen ( s ) ;

    char *r = string_alloc ( n + 1 ) ;

    IGNORE strcpy ( r, s ) ;

    return ( r ) ;

}

/*

    COPY TWO STRINGS

    This routine allocates space for a copy of the string s followed by

    a copy of the string t and concatenates the strings into this space.

    This copy is returned.

*/

char *string_concat

    PROTO_N ( ( s, t ) )

    PROTO_T ( char *s X char *t )

{

    int n = ( int ) strlen ( s ) ;

    int m = ( int ) strlen ( t ) ;

    char *r = string_alloc ( n + m + 1 ) ;

    IGNORE strcpy ( r, s ) ;

    IGNORE strcpy ( r + n, t ) ;

    return ( r ) ;

}

/*

    TEMPORARY WORK SPACE

    This variable gives a temporary work space of size buffer_size

    (see utility.h) which is used as a scratch work area.

*/

char *buffer ;