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

/*  slibtool: a skinny 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_ar_impl.h"

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

/* Generate a symbol mapfile (aka version script) that  */

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

/*                                                      */

/* Since the symbol list is directly derived from the   */

/* archive's armap member, prepending symbol names with */

/* an underscore (where relevant) is not necessary.     */

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

static int slbt_is_strong_coff_symbol(const char * sym)

{

	return strncmp(sym,"__imp_",6)

		&& strncmp(sym,".weak.",6)

		&& strncmp(sym,".refptr.",8);

}

static int slbt_ar_output_mapfile_impl(

	const struct slbt_driver_ctx *  dctx,

	struct slbt_archive_meta_impl * mctx,

	int                             fdout)

{

	bool            fsort;

	bool            fcoff;

	bool            fmach;

	const char *    regex;

	const char **   symv;

	const char **   symstrv;

	regex_t         regctx;

	regmatch_t      pmatch[2] = {{0,0},{0,0}};

	fsort = !(dctx->cctx->fmtflags & SLBT_OUTPUT_ARCHIVE_NOSORT);

	fmach  = slbt_host_objfmt_is_macho(dctx);

	fmach |= (mctx->ofmtattr & AR_OBJECT_ATTR_MACHO);

	fcoff  = slbt_host_objfmt_is_coff(dctx);

	fcoff |= (mctx->ofmtattr & AR_OBJECT_ATTR_COFF);

	if (fcoff) {

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

			return SLBT_SYSTEM_ERROR(dctx,0);

	} else if (fmach) {

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

			return SLBT_SYSTEM_ERROR(dctx,0);

	} else {

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

			return SLBT_SYSTEM_ERROR(dctx,0);

	}

	if (fsort && !mctx->mapstrv)

		if (slbt_update_mapstrv(dctx,mctx) < 0)

			return SLBT_NESTED_ERROR(dctx);

	if ((regex = dctx->cctx->regex))

		if (regcomp(&regctx,regex,REG_NEWLINE))

			return SLBT_CUSTOM_ERROR(

				dctx,

				SLBT_ERR_FLOW_ERROR);

	symstrv = fsort ? mctx->mapstrv : mctx->symstrv;

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

		if (!fcoff || slbt_is_strong_coff_symbol(*symv)) {

			if (!regex || !regexec(&regctx,*symv,1,pmatch,0)) {

				if (fcoff || 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 (regex)

		regfree(&regctx);

	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_ar_create_mapfile_impl(

	const struct slbt_archive_meta *  meta,

	const char *                      path,

	mode_t                            mode)

{

	int                             ret;

	struct slbt_archive_meta_impl * mctx;

	const struct slbt_driver_ctx *  dctx;

	struct slbt_fd_ctx              fdctx;

	int                             fdout;

	mctx = slbt_archive_meta_ictx(meta);

	dctx = (slbt_archive_meta_ictx(meta))->dctx;

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

		return SLBT_NESTED_ERROR(dctx);

	if (!meta->a_memberv)

		return 0;

	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_ar_output_mapfile_impl(

		dctx,mctx,fdout);

	if (path) {

		close(fdout);

	}

	return ret;

}

int slbt_ar_create_mapfile(

	const struct slbt_archive_meta *  meta,

	const char *                      path,

	mode_t                            mode)

{

	return slbt_ar_create_mapfile_impl(meta,path,mode);

}