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

/*  perk: PE Resource Kit                                      */

/*  Copyright (C) 2015--2016  Z. Gilboa                        */

/*  Released under GPLv2 and GPLv3; see COPYING.PERK.          */

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

#include <stdio.h>

#include <unistd.h>

#include <perk/perk.h>

#include <perk/perk_output.h>

#include "perk_driver_impl.h"

#ifndef PERK_DRIVER_FLAGS

#define PERK_DRIVER_FLAGS	PERK_DRIVER_VERBOSITY_ERRORS \

				| PERK_DRIVER_VERBOSITY_USAGE

#endif

static const char vermsg[] = "%s%s%s (git://midipix.org/perk): "

			     "version %s%d.%d.%d%s.\n"

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

static const char * const pe_ver_color[6] = {

		"\x1b[1m\x1b[35m","\x1b[0m",

		"\x1b[1m\x1b[32m","\x1b[0m",

		"\x1b[1m\x1b[34m","\x1b[0m"

};

static const char * const pe_ver_plain[6] = {

		"","",

		"","",

		"",""

};

static ssize_t pe_version(struct pe_driver_ctx * dctx)

{

	const struct pe_source_version * verinfo;

	const char * const * verclr;

	verinfo = pe_source_version();

	verclr  = isatty(STDOUT_FILENO) ? pe_ver_color : pe_ver_plain;

	return fprintf(stdout,vermsg,

			verclr[0],dctx->program,verclr[1],

			verclr[2],verinfo->major,verinfo->minor,

			verinfo->revision,verclr[3],

			verclr[4],verinfo->commit,verclr[5]);

}

static ssize_t pe_paragraph_break(struct pe_unit_ctx * uctx, int * fpara)

{

	if (*fpara) {

		*fpara = 0;

		if (uctx->cctx->ioctx->fdout >= 0)

			return write(uctx->cctx->ioctx->fdout,"\n",1);

		else

			return fputc('\n',stdout);

	} else

		return 0;

}

static void pe_perform_unit_actions(

	const struct pe_driver_ctx *	dctx,

	struct pe_unit_ctx *		uctx)

{

	int      fpara = 0;

	uint64_t flags = uctx->cctx->fmtflags;

	if (flags & PERK_OUTPUT_EXPORT_SYMS) {

		uctx->status = pe_output_export_symbols(uctx->meta,uctx->cctx,0);

		uctx->nerrors += !!uctx->status;

		fpara += uctx->meta->summary.nexpsyms;

	}

	if ((flags & PERK_OUTPUT_IMPORT_LIBS) || (flags & PERK_OUTPUT_IMPORT_SYMS)) {

		pe_paragraph_break(uctx,&fpara;;

		uctx->status = pe_output_import_libraries(dctx,uctx->meta,0);

		uctx->nerrors += !!uctx->status;

		fpara += (uctx->meta->summary.nimplibs > 0);

	}

}

static int pe_exit(struct pe_driver_ctx * dctx, int nerrors)

{

	pe_free_driver_ctx(dctx);

	return nerrors ? 2 : 0;

}

int pe_main(int argc, char ** argv, char ** envp)

{

	int			ret;

	struct pe_driver_ctx *	dctx;

	struct pe_unit_ctx *	uctx;

	const char **		unit;

	if ((ret = pe_get_driver_ctx(argv,envp,PERK_DRIVER_FLAGS,&dctx)))

		return (ret == PERK_USAGE) ? !--argc : 2;

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

		if ((pe_version(dctx)) < 0)

			return pe_exit(dctx,2);

	for (unit=dctx->units; *unit; unit++) {

		if (!(pe_get_unit_ctx(dctx,*unit,&uctx))) {

			pe_perform_unit_actions(dctx,uctx);

			ret += uctx->nerrors;

			pe_free_unit_ctx(uctx);

		}

	}

	return pe_exit(dctx,ret);

}