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/*******************************************************************/
/* slibtool: a skinny libtool implementation, written in C */
/* Copyright (C) 2016--2024 SysDeer Technologies, LLC */
/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
/*******************************************************************/
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <slibtool/slibtool.h>
#include "slibtool_driver_impl.h"
#include "slibtool_errinfo_impl.h"
static int slbt_map_raw_archive(
const struct slbt_driver_ctx * dctx,
int fd,
const char * path,
int prot,
struct slbt_raw_archive * map)
{
struct slbt_input mapinfo = {0,0};
if (slbt_map_input(dctx,fd,path,prot,&mapinfo) < 0)
return SLBT_NESTED_ERROR(dctx);
if (mapinfo.size == 0)
return SLBT_CUSTOM_ERROR(
dctx,
SLBT_ERR_AR_EMPTY_FILE);
map->map_addr = mapinfo.addr;
map->map_size = mapinfo.size;
return 0;
}
static int slbt_unmap_raw_archive(struct slbt_raw_archive * map)
{
struct slbt_input mapinfo;
mapinfo.addr = map->map_addr;
mapinfo.size = map->map_size;
return slbt_unmap_input(&mapinfo);
}
static int slbt_ar_free_archive_ctx_impl(struct slbt_archive_ctx_impl * ctx, int ret)
{
if (ctx) {
slbt_ar_free_archive_meta(ctx->meta);
slbt_unmap_raw_archive(&ctx->map);
free(ctx);
}
return ret;
}
int slbt_ar_get_archive_ctx(
const struct slbt_driver_ctx * dctx,
const char * path,
struct slbt_archive_ctx ** pctx)
{
struct slbt_archive_ctx_impl * ctx;
int prot;
if (!(ctx = calloc(1,sizeof(*ctx))))
return SLBT_BUFFER_ERROR(dctx);
slbt_driver_set_arctx(
dctx,0,path);
prot = (dctx->cctx->actflags & SLBT_ACTION_MAP_READWRITE)
? PROT_READ | PROT_WRITE
: PROT_READ;
if (slbt_map_raw_archive(dctx,-1,path,prot,&ctx->map))
return slbt_ar_free_archive_ctx_impl(ctx,
SLBT_NESTED_ERROR(dctx));
if (slbt_ar_get_archive_meta(dctx,&ctx->map,&ctx->meta))
return slbt_ar_free_archive_ctx_impl(ctx,
SLBT_NESTED_ERROR(dctx));
ctx->dctx = dctx;
ctx->path = path;
ctx->actx.path = &ctx->path;
ctx->actx.map = &ctx->map;
ctx->actx.meta = ctx->meta;
*pctx = &ctx->actx;
return 0;
}
void slbt_ar_free_archive_ctx(struct slbt_archive_ctx * ctx)
{
struct slbt_archive_ctx_impl * ictx;
uintptr_t addr;
if (ctx) {
addr = (uintptr_t)ctx - offsetof(struct slbt_archive_ctx_impl,actx);
ictx = (struct slbt_archive_ctx_impl *)addr;
slbt_ar_free_archive_ctx_impl(ictx,0);
}
}
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