From 77c7bc6d2a11ba719a8e3d384a35a8d12b97583b Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Thu, 22 Feb 2024 23:57:40 +0000
Subject: ar api's: added slbt_ar_create_symfile().

---
 include/slibtool/slibtool.h       |   2 +
 project/common.mk                 |   1 +
 src/arbits/slbt_archive_symfile.c | 123 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 126 insertions(+)
 create mode 100644 src/arbits/slbt_archive_symfile.c

diff --git a/include/slibtool/slibtool.h b/include/slibtool/slibtool.h
index f6e420c..86d5ca5 100644
--- a/include/slibtool/slibtool.h
+++ b/include/slibtool/slibtool.h
@@ -446,6 +446,8 @@ slbt_api int  slbt_ar_store_archive     (struct slbt_archive_ctx *,
 
 slbt_api int  slbt_ar_create_mapfile    (const struct slbt_archive_meta *, const char *, mode_t);
 
+slbt_api int  slbt_ar_create_symfile    (const struct slbt_archive_meta *, const char *, mode_t);
+
 /* utility api */
 slbt_api int  slbt_main                 (char **, char **,
                                          const struct slbt_fd_ctx *);
diff --git a/project/common.mk b/project/common.mk
index e588ce7..f022fde 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -5,6 +5,7 @@ API_SRCS = \
 	src/arbits/slbt_archive_merge.c \
 	src/arbits/slbt_archive_meta.c \
 	src/arbits/slbt_archive_store.c \
+	src/arbits/slbt_archive_symfile.c \
 	src/arbits/slbt_armap_bsd_32.c \
 	src/arbits/slbt_armap_bsd_64.c \
 	src/arbits/slbt_armap_sysv_32.c \
diff --git a/src/arbits/slbt_archive_symfile.c b/src/arbits/slbt_archive_symfile.c
new file mode 100644
index 0000000..498851f
--- /dev/null
+++ b/src/arbits/slbt_archive_symfile.c
@@ -0,0 +1,123 @@
+/*******************************************************************/
+/*  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 <time.h>
+#include <locale.h>
+#include <regex.h>
+#include <inttypes.h>
+#include <slibtool/slibtool.h>
+#include <slibtool/slibtool_output.h>
+#include "slibtool_driver_impl.h"
+#include "slibtool_dprintf_impl.h"
+#include "slibtool_errinfo_impl.h"
+#include "slibtool_pecoff_impl.h"
+#include "slibtool_ar_impl.h"
+
+/********************************************************/
+/* Generate a symbol list that could be used by a build */
+/* system for code generation or any other purpose.     */
+/*                                                      */
+/* The output matches the -Wposix variant of symbol     */
+/* printing, but the interface should be kept separate  */
+/* since the _au_output_ functions implement several    */
+/* output format, whereas here only a single, plain     */
+/* output is expected.                                  */
+/********************************************************/
+
+static int slbt_ar_output_symfile_impl(
+	const struct slbt_driver_ctx *  dctx,
+	struct slbt_archive_meta_impl * mctx,
+	int                             fdout)
+{
+	bool            fsort;
+	bool            fcoff;
+	const char *    regex;
+	const char **   symv;
+	const char **   symstrv;
+	regex_t         regctx;
+	regmatch_t      pmatch[2] = {{0,0},{0,0}};
+
+	fsort = !(dctx->cctx->fmtflags & SLBT_OUTPUT_ARCHIVE_NOSORT);
+
+	fcoff  = slbt_host_objfmt_is_coff(dctx);
+	fcoff |= (mctx->ofmtattr & AR_OBJECT_ATTR_COFF);
+
+	if (fsort && !mctx->mapstrv)
+		if (slbt_update_mapstrv(dctx,mctx) < 0)
+			return SLBT_NESTED_ERROR(dctx);
+
+	if ((regex = dctx->cctx->regex))
+		if (regcomp(&regctx,regex,REG_EXTENDED|REG_NEWLINE))
+			return SLBT_CUSTOM_ERROR(
+				dctx,
+				SLBT_ERR_FLOW_ERROR);
+
+	symstrv = fsort ? mctx->mapstrv : mctx->symstrv;
+
+	for (symv=symstrv; *symv; symv++) {
+		if (!fcoff || slbt_is_strong_coff_symbol(*symv)) {
+			if (!regex || !regexec(&regctx,*symv,1,pmatch,0)) {
+				if (slbt_dprintf(fdout,"%s\n",*symv) < 0)
+					return SLBT_SYSTEM_ERROR(dctx,0);
+			}
+		}
+	}
+
+	if (regex)
+		regfree(&regctx);
+
+	return 0;
+}
+
+
+static int slbt_ar_create_symfile_impl(
+	const struct slbt_archive_meta *  meta,
+	const char *                      path,
+	mode_t                            mode)
+{
+	int                             ret;
+	struct slbt_archive_meta_impl * mctx;
+	const struct slbt_driver_ctx *  dctx;
+	struct slbt_fd_ctx              fdctx;
+	int                             fdout;
+
+	mctx = slbt_archive_meta_ictx(meta);
+	dctx = (slbt_archive_meta_ictx(meta))->dctx;
+
+	if (slbt_lib_get_driver_fdctx(dctx,&fdctx) < 0)
+		return SLBT_NESTED_ERROR(dctx);
+
+	if (!meta->a_memberv)
+		return 0;
+
+	if (path) {
+		if ((fdout = openat(
+				fdctx.fdcwd,path,
+				O_WRONLY|O_CREAT|O_TRUNC,
+				mode)) < 0)
+			return SLBT_SYSTEM_ERROR(dctx,0);
+	} else {
+		fdout = fdctx.fdout;
+	}
+
+	ret = slbt_ar_output_symfile_impl(
+		dctx,mctx,fdout);
+
+	if (path) {
+		close(fdout);
+	}
+
+	return ret;
+}
+
+
+int slbt_ar_create_symfile(
+	const struct slbt_archive_meta *  meta,
+	const char *                      path,
+	mode_t                            mode)
+{
+	return slbt_ar_create_symfile_impl(meta,path,mode);
+}
-- 
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