Replace add_from_buffer with modify, now that runtest does backslash encoding.

.hgignore

diff --git a/.hgignore b/.hgignore
index c6e4c95..9b8a917 100644
--- a/.hgignore
+++ b/.hgignore
@@ -36,8 +36,6 @@
 ^missing$
 ^regress/.*log$
 ^regress/.*trs$
-^regress/add_dir$
-^regress/add_from_buffer$
 ^regress/add_from_filep$
 ^regress/bigzero.zip$
 ^regress/fopen_unchanged$

regress/CMakeLists.txt

diff --git a/regress/CMakeLists.txt b/regress/CMakeLists.txt
index f614266..98ae6cb 100644
--- a/regress/CMakeLists.txt
+++ b/regress/CMakeLists.txt
@@ -8,7 +8,6 @@
 ENDIF(NOT HAVE_GETOPT)
 
 SET(STANDALONE_TEST_PROGRAMS
-  add_from_buffer
   add_from_filep
   fopen_unchanged
 #  fread

regress/Makefile.am

diff --git a/regress/Makefile.am b/regress/Makefile.am
index 99ed0a9..9f575c4 100644
--- a/regress/Makefile.am
+++ b/regress/Makefile.am
@@ -3,7 +3,6 @@
 noinst_SCRIPTS=		runtest
 
 noinst_PROGRAMS= \
-	add_from_buffer \
 	add_from_filep \
 	fopen_unchanged \
 	fread \

regress/add_from_buffer.c

diff --git a/regress/add_from_buffer.c b/regress/add_from_buffer.c
deleted file mode 100644
index 5fad1ca..0000000
--- a/regress/add_from_buffer.c
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
-  add_from_buffer.c -- test case for adding file from buffer to archive
-  Copyright (C) 1999-2014 Dieter Baron and Thomas Klausner
-
-  This file is part of libzip, a library to manipulate ZIP archives.
-  The authors can be contacted at <libzip@nih.at>
-
-  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.
-  3. The names of the authors may not be used to endorse or promote
-     products derived from this software without specific prior
-     written permission.
- 
-  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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 <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "zip.h"
-
-const char *teststr="This is a test, and it seems to have been successful.\n";
-const char *file="teststring.txt";
-const char *prg;
-
-int
-main(int argc, char *argv[])
-{
-    const char *archive;
-    zip_t *za;
-    zip_source_t *zs;
-    int err;
-
-    prg = argv[0];
-
-    if (argc != 2) {
-	fprintf(stderr, "usage: %s archive\n", prg);
-	return 1;
-    }
-
-    archive = argv[1];
-    
-    if ((za=zip_open(archive, ZIP_CREATE, &err)) == NULL) {
-	zip_error_t error;
-	zip_error_init_with_code(&error, err);
-	fprintf(stderr, "%s: can't open zip archive '%s': %s\n", prg, archive, zip_error_strerror(&error));
-	zip_error_fini(&error);
-	return 1;
-    }
-
-    if ((zs=zip_source_buffer(za, teststr, strlen(teststr), 0)) == NULL) {
-	fprintf(stderr, "%s: can't create zip_source from buffer: %s\n", prg,
-		zip_strerror(za));
-	exit(1);
-    }
-
-    if (zip_add(za, file, zs) == -1) {
-	zip_source_free(zs);
-	fprintf(stderr, "%s: can't add file '%s': %s\n", prg,
-		file, zip_strerror(za));
-	return 1;
-    }
-
-    if (zip_close(za) == -1) {
-	fprintf(stderr, "%s: can't close zip archive '%s': %s\n", prg,
-		archive, zip_strerror(za));
-	return 1;
-    }
-
-    return 0;
-}

regress/add_from_buffer.test

diff --git a/regress/add_from_buffer.test b/regress/add_from_buffer.test
index ff6c472..d0a1ebb 100644
--- a/regress/add_from_buffer.test
+++ b/regress/add_from_buffer.test
@@ -1,5 +1,5 @@
 # add buffer contents as file to zip
-program add_from_buffer
+program modify
 return 0
-args testbuffer.zip
+args testbuffer.zip add teststring.txt "This is a test, and it seems to have been successful.\n"
 file-new testbuffer.zip testbuffer.zip