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

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

/*  Copyright (C) 2016--2018  Z. Gilboa                            */

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

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

#include <fcntl.h>

#include <stdio.h>

#include <string.h>

#include <stdbool.h>

#include <slibtool/slibtool.h>

#include "slibtool_dprintf_impl.h"

#include "slibtool_errinfo_impl.h"

#include "slibtool_metafile_impl.h"

static int  slbt_create_default_library_wrapper(

	const struct slbt_driver_ctx *	dctx,

	struct slbt_exec_ctx *		ectx,

	char *				arname,

	char *				soname,

	char *				soxyz,

	char *				solnk)

{

	int					ret;

	int					fdout;

	const char *				header;

	const char *				base;

	bool					fnover;

	bool					fvernum;

	int					current;

	int					revision;

	int					age;

	const struct slbt_source_version *	verinfo;

	(void)ectx;

	/* create */

	if ((fdout = openat(

			AT_FDCWD,

			dctx->cctx->output,

			O_RDWR|O_CREAT|O_TRUNC,

			0644)) < 0)

		return SLBT_SYSTEM_ERROR(dctx);

	/* version info */

	current  = 0;

	age      = 0;

	revision = 0;

	if (dctx->cctx->verinfo.verinfo)

		sscanf(dctx->cctx->verinfo.verinfo,"%d:%d:%d",

			&current,&revision,&age;;

	fnover  = !!(dctx->cctx->drvflags & SLBT_DRIVER_AVOID_VERSION);

	fvernum = !!(dctx->cctx->verinfo.vernumber);

	verinfo = slbt_source_version();

	/* wrapper header */

	header = "libtool compatible library wrapper\n";

	base   = "";

	/* wrapper content */

	ret = slbt_dprintf(fdout,

		"# %s%s"

		"# Generated by %s (slibtool %d.%d.%d)\n"

		"# [commit reference: %s]\n\n"

		"dlname='%s'\n"

		"library_names='%s %s %s'\n"

		"old_library='%s'\n\n"

		"inherited_linker_flags='%s'\n"

		"dependency_libs='%s'\n"

		"weak_library_names='%s'\n\n"

		"current=%d\n"

		"age=%d\n"

		"revision=%d\n\n"

		"installed=%s\n"

		"shouldnotlink=%s\n\n"

		"dlopen='%s'\n"

		"dlpreopen='%s'\n\n"

		"libdir='%s'\n",

		/* wrapper header */

		base,header,

		/* nickname, verinfo */

		dctx->program,

		verinfo->major,verinfo->minor,verinfo->revision,

		verinfo->commit,

		/* dlname */

		fnover ? solnk : soxyz,

		/* library_names */

		fnover ? solnk : soxyz,

		fnover ? solnk : soname,

		solnk,

		/* old_library */

		arname,

		/* inherited_linker_flags, dependency_libs, weak_library_names */

		"","","",

		/* current, age, revision */

		fvernum ? dctx->cctx->verinfo.major : current,

		fvernum ? dctx->cctx->verinfo.minor : age,

		fvernum ? dctx->cctx->verinfo.major : revision,

		/* installed, shouldnotlink */

		"no","no",

		/* dlopen, dlpreopen */

		"","",

		/* libdir */

		dctx->cctx->rpath ? dctx->cctx->rpath : "");

	close(fdout);

	return (ret < 0) ? SLBT_SYSTEM_ERROR(dctx) : 0;

}

static int  slbt_create_compatible_library_wrapper(

	const struct slbt_driver_ctx *	dctx,

	struct slbt_exec_ctx *		ectx,

	char *				arname,

	char *				soname,

	char *				soxyz,

	char *				solnk)

{

	int					ret;

	FILE *					fout;

	const char *				base;

	bool					fnover;

	bool					fvernum;

	int					current;

	int					revision;

	int					age;

	const struct slbt_source_version *	verinfo;

	(void)ectx;

	/* create */

	if (!(fout = fopen(dctx->cctx->output,"w")))

		return SLBT_SYSTEM_ERROR(dctx);

	/* version info */

	current  = 0;

	age      = 0;

	revision = 0;

	/* wrapper header */

	if ((base = strrchr(dctx->cctx->output,'/'))) {

		base++;

	} else {

		base = dctx->cctx->output;

	}

	if (dctx->cctx->verinfo.verinfo)

		sscanf(dctx->cctx->verinfo.verinfo,"%d:%d:%d",

			&current,&revision,&age;;

	fnover  = !!(dctx->cctx->drvflags & SLBT_DRIVER_AVOID_VERSION);

	fvernum = !!(dctx->cctx->verinfo.vernumber);

	verinfo = slbt_source_version();

	/* wrapper content */

	ret = fprintf(fout,

		"# %s - a libtool library file\n"

		"# Generated by %s (slibtool %d.%d.%d)\n"

		"# [commit reference: %s]\n"

		"#\n"

		"# Please DO NOT delete this file!\n"

		"# It is necessary for linking the library.\n\n"

		"# The name that we can dlopen(3).\n"

		"dlname='%s'\n\n"

		"# Names of this library.\n"

		"library_names='%s %s %s'\n\n"

		"# The name of the static archive.\n"

		"old_library='%s'\n\n"

		"# Linker flags that can not go in dependency_libs.\n"

		"inherited_linker_flags='%s'\n\n"

		"# Libraries that this one depends upon.\n"

		"dependency_libs='%s'\n\n"

		"# Names of additional weak libraries provided by this library\n"

		"weak_library_names='%s'\n\n"

		"# Version information for %s%s.\n"

		"current=%d\n"

		"age=%d\n"

		"revision=%d\n\n"

		"# Is this an already installed library?\n"

		"installed=%s\n\n"

		"# Should we warn about portability when linking against -modules?\n"

		"shouldnotlink=%s\n\n"

		"# Files to dlopen/dlpreopen\n"

		"dlopen='%s'\n"

		"dlpreopen='%s'\n\n"

		"# Directory that this library needs to be installed in:\n"

		"libdir='%s'\n",

		/* wrapper header */

		base,

		/* nickname, verinfo */

		dctx->program,

		verinfo->major,verinfo->minor,verinfo->revision,

		verinfo->commit,

		/* dlname */

		fnover ? solnk : soxyz,

		/* library_names */

		fnover ? solnk : soxyz,

		fnover ? solnk : soname,

		solnk,

		/* old_library */

		arname,

		/* inherited_linker_flags, dependency_libs, weak_library_names */

		"","","",

		/* version information for */

		(dctx->cctx->drvflags & SLBT_DRIVER_MODULE)

		    ? "" : dctx->cctx->settings.dsoprefix,

		dctx->cctx->libname,

		/* current, age, revision */

		fvernum ? dctx->cctx->verinfo.major : current,

		fvernum ? dctx->cctx->verinfo.minor : age,

		fvernum ? dctx->cctx->verinfo.major : revision,

		/* installed, shouldnotlink */

		"no","no",

		/* dlopen, dlpreopen */

		"","",

		/* libdir */

		dctx->cctx->rpath ? dctx->cctx->rpath : "");

	return (ret <= 0) || fclose(fout)

		? SLBT_SYSTEM_ERROR(dctx)

		: 0;

}

int  slbt_create_library_wrapper(

	const struct slbt_driver_ctx *	dctx,

	struct slbt_exec_ctx *		ectx,

	char *				arname,

	char *				soname,

	char *				soxyz,

	char *				solnk)

{

	if (dctx->cctx->drvflags & SLBT_DRIVER_LEGABITS)

		return slbt_create_compatible_library_wrapper(

			dctx,ectx,arname,soxyz,soname,solnk);

	else

		return slbt_create_default_library_wrapper(

			dctx,ectx,arname,soxyz,soname,solnk);

}