/*******************************************************************/

/*  slibtool: a strong libtool implementation, written in C        */

/*  Copyright (C) 2016--2024  SysDeer Technologies, LLC            */

/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */

/*******************************************************************/

#include <time.h>

#include <locale.h>

#include <regex.h>

#include <inttypes.h>

#include <slibtool/slibtool.h>

#include <slibtool/slibtool_output.h>

#include "slibtool_driver_impl.h"

#include "slibtool_dprintf_impl.h"

#include "slibtool_errinfo_impl.h"

#include "slibtool_pecoff_impl.h"

#include "slibtool_ar_impl.h"

/****************************************************/

/* Generate a linker version script (aka mapfile)   */

/* that could be passed to the host linker.         */

/*                                                  */

/* Since the provided symbol list is host-neautral, */

/* prepend symbol names with an underscore whenever */

/* necessary.                                       */

/****************************************************/

static int slbt_util_output_mapfile_impl(

	const struct slbt_driver_ctx *  dctx,

	const struct slbt_symlist_ctx * sctx,

	int                             fdout)

{

	bool            fcoff;

	bool            fmach;

	const char *    dot;

	const char *    mark;

	const char **   symv;

	const char **   symstrv;

	char            strbuf[4096];

	fcoff = slbt_host_objfmt_is_coff(dctx);

	fmach = slbt_host_objfmt_is_macho(dctx);

	if (fcoff) {

		if (slbt_dprintf(fdout,"EXPORTS\n") < 0)

			return SLBT_SYSTEM_ERROR(dctx,0);

	} else if (fmach) {

		if (slbt_dprintf(fdout,"# export_list, underscores prepended\n") < 0)

			return SLBT_SYSTEM_ERROR(dctx,0);

	} else {

		if (slbt_dprintf(fdout,"{\n" "\t" "global:\n") < 0)

			return SLBT_SYSTEM_ERROR(dctx,0);

	}

	symstrv = sctx->symstrv;

	for (symv=symstrv; *symv; symv++) {

		if (fcoff && slbt_is_strong_coff_symbol(*symv)) {

			if (slbt_dprintf(fdout,"%s\n",*symv) < 0)

				return SLBT_SYSTEM_ERROR(dctx,0);

		} else if (fcoff && !strncmp(*symv,".weak.",6)) {

			mark = &(*symv)[6];

			dot  = strchr(mark,'.');

			strncpy(strbuf,mark,dot-mark);

			strbuf[dot-mark] = '\0';

			if (slbt_dprintf(fdout,"    %s = %s\n",strbuf,++dot) < 0)

				return SLBT_SYSTEM_ERROR(dctx,0);

		} else if (fmach) {

			if (slbt_dprintf(fdout,"_%s\n",*symv) < 0)

				return SLBT_SYSTEM_ERROR(dctx,0);

		} else {

			if (slbt_dprintf(fdout,"\t\t%s;\n",*symv) < 0)

				return SLBT_SYSTEM_ERROR(dctx,0);

		}

	}

	if (!fcoff && !fmach)

		if (slbt_dprintf(fdout,"\n\t" "local:\n" "\t\t*;\n" "};\n") < 0)

			return SLBT_SYSTEM_ERROR(dctx,0);

	return 0;

}

static int slbt_util_create_mapfile_impl(

	const struct slbt_symlist_ctx *   sctx,

	const char *                      path,

	mode_t                            mode)

{

	int                             ret;

	const struct slbt_driver_ctx *  dctx;

	struct slbt_fd_ctx              fdctx;

	int                             fdout;

	dctx = (slbt_get_symlist_ictx(sctx))->dctx;

	if (slbt_lib_get_driver_fdctx(dctx,&fdctx) < 0)

		return SLBT_NESTED_ERROR(dctx);

	if (path) {

		if ((fdout = openat(

				fdctx.fdcwd,path,

				O_WRONLY|O_CREAT|O_TRUNC,

				mode)) < 0)

			return SLBT_SYSTEM_ERROR(dctx,0);

	} else {

		fdout = fdctx.fdout;

	}

	ret = slbt_util_output_mapfile_impl(

		dctx,sctx,fdout);

	if (path) {

		close(fdout);

	}

	return ret;

}

int slbt_util_create_mapfile(

	const struct slbt_symlist_ctx *   sctx,

	const char *                      path,

	mode_t                            mode)

{

	return slbt_util_create_mapfile_impl(sctx,path,mode);

}