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

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

/*  Copyright (C) 2016--2021  SysDeer Technologies, LLC            */

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

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

#include <stdint.h>

#include <string.h>

#include <unistd.h>

#include <stdlib.h>

#include <stdbool.h>

#include <slibtool/slibtool.h>

#include "slibtool_version.h"

#include "slibtool_driver_impl.h"

#include "slibtool_errinfo_impl.h"

int slbt_init_link_params(struct slbt_driver_ctx_impl * ctx)

{

	const char * program;

	const char * libname;

	const char * prefix;

	const char * base;

	char *       dot;

	bool         fmodule;

	int          fderr;

	fderr   = ctx->fdctx.fderr;

	program = slbt_program_name(ctx->cctx.targv[0]);

	libname = 0;

	prefix  = 0;

	fmodule = false;

	/* output */

	if (!(ctx->cctx.output)) {

		if (ctx->cctx.drvflags & SLBT_DRIVER_VERBOSITY_ERRORS)

			slbt_dprintf(fderr,

				"%s: error: output file must be "

				"specified in link mode.\n",

				program);

		return -1;

	}

	/* executable? */

	if (!(dot = strrchr(ctx->cctx.output,'.')))

		if (!(ctx->cctx.drvflags & SLBT_DRIVER_MODULE))

			return 0;

	/* todo: archive? library? wrapper? inlined function, avoid repetition */

	if ((base = strrchr(ctx->cctx.output,'/')))

		base++;

	else

		base = ctx->cctx.output;

	/* archive? */

	if (dot && !strcmp(dot,ctx->cctx.settings.arsuffix)) {

		prefix = ctx->cctx.settings.arprefix;

		if (!strncmp(prefix,base,strlen(prefix)))

			libname = base;

		else {

			if (ctx->cctx.drvflags & SLBT_DRIVER_VERBOSITY_ERRORS)

				slbt_dprintf(fderr,

					"%s: error: output file prefix does "

					"not match its (archive) suffix; "

					"the expected prefix was '%s'\n",

					program,prefix);

			return -1;

		}

	}

	/* library? */

	else if (dot && !strcmp(dot,ctx->cctx.settings.dsosuffix)) {

		prefix = ctx->cctx.settings.dsoprefix;

		if (!strncmp(prefix,base,strlen(prefix))) {

			libname = base;

		} else if (ctx->cctx.drvflags & SLBT_DRIVER_MODULE) {

			libname = base;

			fmodule = true;

		} else {

			if (ctx->cctx.drvflags & SLBT_DRIVER_VERBOSITY_ERRORS)

				slbt_dprintf(fderr,

					"%s: error: output file prefix does "

					"not match its (shared library) suffix; "

					"the expected prefix was '%s'\n",

					program,prefix);

			return -1;

		}

	}

	/* wrapper? */

	else if (dot && !strcmp(dot,".la")) {

		prefix = ctx->cctx.settings.dsoprefix;

		if (!strncmp(prefix,base,strlen(prefix))) {

			libname = base;

			fmodule = !!(ctx->cctx.drvflags & SLBT_DRIVER_MODULE);

		} else if (ctx->cctx.drvflags & SLBT_DRIVER_MODULE) {

			libname = base;

			fmodule = true;

		} else {

			if (ctx->cctx.drvflags & SLBT_DRIVER_VERBOSITY_ERRORS)

				slbt_dprintf(fderr,

					"%s: error: output file prefix does "

					"not match its (libtool wrapper) suffix; "

					"the expected prefix was '%s'\n",

					program,prefix);

			return -1;

		}

	} else

		return 0;

	/* libname alloc */

	if (!fmodule)

		libname += strlen(prefix);

	if (!(ctx->libname = strdup(libname)))

		return -1;

	if ((dot  = strrchr(ctx->libname,'.')))

		*dot = 0;

	ctx->cctx.libname = ctx->libname;

	return 0;

}