Added xxd example tests from original manual

Signed-off-by: Andrea Zoppi <texzk@email.it>

src/hexrec/cli.py

@@ -681,7 +681,7 @@ def flood(
               expose_value=False, callback=print_hexdump_version, help="""
     Print version and exit.
 """)
-@click.argument('infile', type=FILE_PATH_IN)
+@click.argument('infile', type=FILE_PATH_IN, required=False)
 def hexdump(
     infile: str,
     one_byte_octal: Sequence[bool],
@@ -812,7 +812,7 @@ def hexdump(
               expose_value=False, callback=print_hexdump_version, help="""
     Print version and exit.
 """)
-@click.argument('infile', type=FILE_PATH_IN)
+@click.argument('infile', type=FILE_PATH_IN, required=False)
 def hd(
     infile: str,
     one_byte_octal: Sequence[bool],
@@ -1219,8 +1219,8 @@ def del_header(
               expose_value=False, callback=print_version, help="""
     Prints the package version number.
 """)
-@click.argument('infile', type=FILE_PATH_IN)
-@click.argument('outfile', type=FILE_PATH_OUT)
+@click.argument('infile', type=FILE_PATH_IN, required=False)
+@click.argument('outfile', type=FILE_PATH_OUT, required=False)
 def xxd(
     autoskip: bool,
     bits: bool,

src/hexrec/xxd.py

@@ -48,8 +48,8 @@
 _SEEKING_REGEX = re.compile(r'^(?P<sign>\+?-?)-?(?P<absolute>\w+)$')
 
 _REVERSE_REGEX = re.compile(b'^\\s*(?P<address>[A-Fa-f0-9]+)\\s*:\\s*'
-                            b'(?P<data>([A-Fa-f0-9]{2}\\s*)+)'
-                            b'[ ]{2}(?P<garbage>.*)$')
+                            b'(?P<data>([A-Fa-f0-9]{2}\\s?)+)'
+                            b'(\\s.*)?$')
 
 ZERO_BLOCK_SIZE = 1 << 20  # 1 MiB
 
@@ -344,7 +344,8 @@ def xxd_core(
             outfile = None
             outstream = sys.stdout.buffer
         elif isinstance(outfile, str):
-            outstream = open(outfile, 'w+b' if revert and oseek else 'wb')
+            mode = 'r+b' if revert and os.path.exists(outfile) else 'wb'
+            outstream = open(outfile, mode)
         elif isinstance(outfile, MutableMemory):
             outstream = SparseMemoryIO(memory=outfile)
             outsparse = True
@@ -357,14 +358,20 @@ def xxd_core(
         if iseek is not None:
             ss, sv = parse_seek(str(iseek))
 
-            if ss == '+':
-                instream.seek(sv, io.SEEK_CUR)
-            elif ss == '+-':
-                instream.seek(-sv, io.SEEK_CUR)
-            elif ss == '-':
-                instream.seek(-sv, io.SEEK_END)
-            else:  # elif ss == '':
-                instream.seek(sv, io.SEEK_SET)
+            if revert:
+                if '-' in ss:
+                    sv = -sv
+                iseek = sv
+
+            else:
+                if ss == '+':
+                    instream.seek(sv, io.SEEK_CUR)
+                elif ss == '+-':
+                    instream.seek(-sv, io.SEEK_CUR)
+                elif ss == '-':
+                    instream.seek(-sv, io.SEEK_END)
+                else:  # elif ss == '':
+                    instream.seek(sv, io.SEEK_SET)
 
             offset += instream.tell()
 
@@ -391,7 +398,7 @@ def xxd_core(
                     if match:
                         # Interpret line contents
                         groups = match.groupdict()
-                        address = (oseek or 0) + int(groups['address'], 16)
+                        address = (oseek or 0) + (iseek or 0) + int(groups['address'], 16)
                         data = _unhexlify(groups['data'])
                         data = data[:cols]
 

tests/test_xxd.py

@@ -1,6 +1,7 @@
 import glob
 import io
 import os
+import shutil
 import sys
 from pathlib import Path
 from typing import Any
@@ -72,7 +73,7 @@ def test_by_filename_text(tmppath, datapath):
 
     for filename in test_filenames:
         filename = os.path.basename(filename)
-        print(filename)
+        print('@', filename, file=sys.stderr)
         path_out = tmppath / filename
         path_ref = datapath / filename
 
@@ -92,12 +93,20 @@ def test_by_filename_text(tmppath, datapath):
 
 
 def test_by_filename_bytes(tmppath, datapath):
+    copy_filenames = [
+        (r'xxd.1', r'test_xxd_-r_xxd.1.patch.xxd.bin'),
+    ]
+    for path_ref, path_out in copy_filenames:
+        path_ref = str(datapath / path_ref)
+        path_out = str(tmppath / path_out)
+        shutil.copy(path_ref, path_out)
+
     prefix = 'test_xxd_'
     test_filenames = glob.glob(str(datapath / (prefix + '*.bin')))
 
     for filename in test_filenames:
         filename = os.path.basename(filename)
-        print(filename)
+        print('@', filename, file=sys.stderr)
         path_out = tmppath / filename
         path_ref = datapath / filename
 
@@ -240,6 +249,24 @@ def test_xxd_include_stdin(datapath):
     assert text_out == text_ref
 
 
+def test_xxd_include_stdin_cli(tmppath, datapath):
+    filename = 'xxd_-i_STDIN_file.c'
+    path_out = tmppath / filename
+    path_ref = datapath / filename
+    path_in = datapath / 'file'
+
+    args = 'xxd -i - '.split() + [str(path_out)]
+
+    runner = CliRunner()
+    data_in = read_bytes(path_in)
+    result = runner.invoke(_cast(Any, cli_main), args, input=data_in)
+    assert result.exit_code == 0
+
+    ans_out = read_text(path_out)
+    ans_ref = read_text(path_ref)
+    assert ans_out == ans_ref
+
+
 def test_xxd_none(datapath):
     with open(str(datapath / 'test_xxd_bytes.bin.xxd'), 'rb') as stream:
         text_ref = stream.read().replace(b'\r\n', b'\n')

tests/test_xxd/A.bin

@@ -0,0 +1 @@
+A

tests/test_xxd/A.xxd

@@ -0,0 +1 @@
+010000: 41