1 files changed, 100 insertions, 0 deletions
diff --git a/libpe/pe_buffer.c b/libpe/pe_buffer.c
new file mode 100644
index 000000000000..e4ac19fa04b8
--- /dev/null
+++ b/libpe/pe_buffer.c
@@ -0,0 +1,100 @@
+/*-
+ * Copyright (c) 2016 Kai Wang
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+
+#include "_libpe.h"
+
+ELFTC_VCSID("$Id: pe_buffer.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
+
+PE_Buffer *
+pe_getbuffer(PE_Scn *ps, PE_Buffer *pb)
+{
+	PE *pe;
+	PE_SecBuf *sb;
+
+	if (ps == NULL) {
+		errno = EINVAL;
+		return (NULL);
+	}
+
+	pe = ps->ps_pe;
+
+	if ((ps->ps_flags & LIBPE_F_LOAD_SECTION) == 0) {
+		if (pe->pe_flags & LIBPE_F_FD_DONE) {
+			errno = EACCES;
+			return (NULL);
+		}
+		if (pe->pe_flags & LIBPE_F_SPECIAL_FILE) {
+			if (libpe_load_all_sections(pe) < 0)
+				return (NULL);
+		} else {
+			if (libpe_load_section(pe, ps) < 0)
+				return (NULL);
+		}
+	}
+
+	sb = (PE_SecBuf *) pb;
+
+	if (sb == NULL)
+		sb = STAILQ_FIRST(&ps->ps_b);
+	else
+		sb = STAILQ_NEXT(sb, sb_next);
+
+	return ((PE_Buffer *) sb);
+}
+
+PE_Buffer *
+pe_newbuffer(PE_Scn *ps)
+{
+	PE *pe;
+	PE_SecBuf *sb;
+
+	if (ps == NULL) {
+		errno = EINVAL;
+		return (NULL);
+	}
+
+	pe = ps->ps_pe;
+
+	if (pe->pe_flags & LIBPE_F_FD_DONE) {
+		errno = EACCES;
+		return (NULL);
+	}
+
+	if ((ps->ps_flags & LIBPE_F_LOAD_SECTION) == 0) {
+		if (libpe_load_section(pe, ps) < 0)
+			return (NULL);
+	}
+
+	if ((sb = libpe_alloc_buffer(ps, 0)) == NULL)
+		return (NULL);
+
+	sb->sb_flags |= PE_F_DIRTY;
+	ps->ps_flags |= PE_F_DIRTY;
+
+	return ((PE_Buffer *) sb);
+}