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authormidipix <writeonce@midipix.org>2024-01-06 09:19:04 +0000
committermidipix <writeonce@midipix.org>2024-01-22 03:49:50 +0000
commit7bab5a71cefe37b583b08fec0177fc569f041980 (patch)
tree2b9df70fa95b7481deff97d66fbc3b00a46681ff /src/arbits
parentd4473b3be02d429a72347914a6fc7e5688ad98e5 (diff)
downloadslibtool-7bab5a71cefe37b583b08fec0177fc569f041980.tar.bz2
slibtool-7bab5a71cefe37b583b08fec0177fc569f041980.tar.xz
ar mode: slbt_get_archive_ctx(): initial implementation and integration.
Diffstat (limited to 'src/arbits')
-rw-r--r--src/arbits/slbt_archive_ctx.c106
1 files changed, 106 insertions, 0 deletions
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 <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_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);
+ }
+}