Add support for Visual Studio 2019

external/libelf/src/getarsym.c

@@ -0,0 +1,87 @@
+/*
+ * getarsym.c - implementation of the elf_getarsym(3) function.
+ * Copyright (C) 1995 - 1998, 2004 Michael Riepe
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <private.h>
+#include <byteswap.h>
+
+#ifndef lint
+static const char rcsid[] = "@(#) $Id: getarsym.c,v 1.9 2008/05/23 08:15:34 michael Exp $";
+#endif /* lint */
+
+Elf_Arsym*
+elf_getarsym(Elf *elf, size_t *ptr) {
+    Elf_Arsym *syms;
+    size_t count;
+    size_t tmp;
+    size_t i;
+    char *s;
+    char *e;
+
+    if (!ptr) {
+	ptr = &tmp;
+    }
+    *ptr = 0;
+    if (!elf) {
+	return NULL;
+    }
+    elf_assert(elf->e_magic == ELF_MAGIC);
+    if (elf->e_kind != ELF_K_AR) {
+	seterr(ERROR_NOTARCHIVE);
+	return NULL;
+    }
+    if (elf->e_symtab && !elf->e_free_syms) {
+	if (elf->e_symlen < 4) {
+	    seterr(ERROR_SIZE_ARSYMTAB);
+	    return NULL;
+	}
+	count = __load_u32M(elf->e_symtab);
+	if (elf->e_symlen < 4 * (count + 1)) {
+	    seterr(ERROR_SIZE_ARSYMTAB);
+	    return NULL;
+	}
+	if (!(syms = (Elf_Arsym*)malloc((count + 1) * sizeof(*syms)))) {
+	    seterr(ERROR_MEM_ARSYMTAB);
+	    return NULL;
+	}
+	s = elf->e_symtab + 4 * (count + 1);
+	e = elf->e_symtab + elf->e_symlen;
+	for (i = 0; i < count; i++, s++) {
+	    syms[i].as_name = s;
+	    while (s < e && *s) {
+		s++;
+	    }
+	    if (s >= e) {
+		seterr(ERROR_SIZE_ARSYMTAB);
+		free(syms);
+		return NULL;
+	    }
+	    elf_assert(!*s);
+	    syms[i].as_hash = elf_hash((unsigned char*)syms[i].as_name);
+	    syms[i].as_off = __load_u32M(elf->e_symtab + 4 * (i + 1));
+	}
+	syms[count].as_name = NULL;
+	syms[count].as_hash = ~0UL;
+	syms[count].as_off = 0;
+	elf->e_symtab = (char*)syms;
+	elf->e_symlen = count + 1;
+	elf->e_free_syms = 1;
+    }
+    *ptr = elf->e_symlen;
+    return (Elf_Arsym*)elf->e_symtab;
+}