From 7bab5a71cefe37b583b08fec0177fc569f041980 Mon Sep 17 00:00:00 2001 From: midipix Date: Sat, 6 Jan 2024 09:19:04 +0000 Subject: ar mode: slbt_get_archive_ctx(): initial implementation and integration. --- src/arbits/slbt_archive_ctx.c | 106 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 src/arbits/slbt_archive_ctx.c (limited to 'src/arbits') diff --git a/src/arbits/slbt_archive_ctx.c b/src/arbits/slbt_archive_ctx.c new file mode 100644 index 0000000..c9c1a7d --- /dev/null +++ b/src/arbits/slbt_archive_ctx.c @@ -0,0 +1,106 @@ +/*******************************************************************/ +/* 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 +#include +#include +#include +#include + +#include +#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_free_archive_ctx_impl(struct slbt_archive_ctx_impl * ctx, int ret) +{ + if (ctx) { + slbt_free_archive_meta(ctx->meta); + slbt_unmap_raw_archive(&ctx->map); + free(ctx); + } + + return ret; +} + +int slbt_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_free_archive_ctx_impl(ctx, + SLBT_NESTED_ERROR(dctx)); + + if (slbt_get_archive_meta(dctx,&ctx->map,&ctx->meta)) + return slbt_free_archive_ctx_impl(ctx, + SLBT_NESTED_ERROR(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_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_free_archive_ctx_impl(ictx,0); + } +} -- cgit v1.2.3