orbea / cross / slibtool

Forked from cross/slibtool 3 years ago
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Blame src/driver/slbt_unit_ctx.c

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/*******************************************************************/
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/*  slibtool: a skinny libtool implementation, written in C        */
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/*  Copyright (C) 2016  Z. Gilboa                                  */
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/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
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/*******************************************************************/
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#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <slibtool/slibtool.h>
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#include "slibtool_driver_impl.h"
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static int slbt_free_unit_ctx_impl(struct slbt_unit_ctx_impl * ctx, int status)
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{
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	if (ctx) {
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		slbt_unmap_input(&ctx->map);
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		free(ctx);
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	}
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	return status;
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}
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int slbt_get_unit_ctx(
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	const struct slbt_driver_ctx *	dctx,
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	const char *			path,
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	struct slbt_unit_ctx **		pctx)
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{
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	struct slbt_unit_ctx_impl *	ctx;
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	if (!dctx || !(ctx = calloc(1,sizeof(*ctx))))
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		return -1;
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	if (slbt_map_input(-1,path,PROT_READ,&ctx->map))
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		return slbt_free_unit_ctx_impl(ctx,-1);
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	memcpy(&ctx->cctx,dctx->cctx,
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		sizeof(ctx->cctx));
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	ctx->path	= path;
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	ctx->uctx.path	= &ctx->path;
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	ctx->uctx.map	= &ctx->map;
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	ctx->uctx.cctx	= &ctx->cctx;
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	*pctx = &ctx->uctx;
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	return 0;
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}
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void slbt_free_unit_ctx(struct slbt_unit_ctx * ctx)
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{
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	struct slbt_unit_ctx_impl *	ictx;
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	uintptr_t			addr;
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	if (ctx) {
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		addr = (uintptr_t)ctx - offsetof(struct slbt_unit_ctx_impl,uctx);
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		ictx = (struct slbt_unit_ctx_impl *)addr;
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		slbt_free_unit_ctx_impl(ictx,0);
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	}
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}