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/*

 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. Neither the name of The TenDRA Project nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific, prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS

 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * $Id$

 */

/*

    		 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(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(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(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(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(void)

{

	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(filename *p, 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(int s, 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(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(char *s, 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(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(filename *p, int t, 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);

}