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

/*  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"

#include "argv/argv.h"

int slbt_init_version_info(

	struct slbt_driver_ctx_impl *	ictx,

	struct slbt_version_info *	verinfo)

{

	int	current;

	int	revision;

	int	age;

	int	colons;

	int	fmtcnt;

	const char * ch;

	if (!verinfo->verinfo && !verinfo->vernumber)

		return 0;

	if (verinfo->vernumber) {

		sscanf(verinfo->vernumber,"%d:%d:%d",

			&verinfo->major,

			&verinfo->minor,

			&verinfo->revision);

		return 0;

	}

	current = revision = age = 0;

	for (colons=0, ch=verinfo->verinfo; *ch; ch++)

		if (*ch == ':')

			colons++;

	fmtcnt = sscanf(verinfo->verinfo,"%d:%d:%d",

		&current,&revision,&age;;

	if (!fmtcnt || (fmtcnt > 3) || (fmtcnt != colons + 1)) {

		slbt_dprintf(ictx->fdctx.fderr,

			"%s: error: invalid version info: "

			"supported argument format is %%d[:%%d[:%%d]].\n",

			slbt_program_name(ictx->cctx.targv[0]));

		return -1;

	}

	if (current < age) {

		if (ictx->cctx.drvflags & SLBT_DRIVER_VERBOSITY_ERRORS)

			slbt_dprintf(ictx->fdctx.fderr,

				"%s: error: invalid version info: "

				"<current> may not be smaller than <age>.\n",

				slbt_program_name(ictx->cctx.targv[0]));

		return -1;

	}

	verinfo->major    = current - age;

	verinfo->minor    = age;

	verinfo->revision = revision;

	return 0;

}