Commit 97b1b294 authored by Eli Zaretskii's avatar Eli Zaretskii

Fix Bug #876:

(inhibit_null_byte_detection): New variable.
(detect_coding, detect_coding_system): Don't pay attention to null bytes if
inhibit_null_byte_detection is non-zero.
(syms_of_coding) <inhibit-null-byte-detection>: Declare and document.
<inhibit-iso-escape-detection>: Doc fix.
parent fca863b8
2009-01-10 Eli Zaretskii <eliz@gnu.org>
Fix Bug #876:
* coding.c (inhibit_null_byte_detection): New variable.
(detect_coding, detect_coding_system): Don't pay attention to null
bytes if inhibit_null_byte_detection is non-zero.
(syms_of_coding) <inhibit-null-byte-detection>: Declare and
document.
<inhibit-iso-escape-detection>: Doc fix.
2009-01-09 Jason Rumney <jasonr@gnu.org>
* w32font.c (add_font_entity_to_list): Don't report unknown
......
......@@ -380,6 +380,9 @@ int inhibit_eol_conversion;
/* Flag to inhibit ISO2022 escape sequence detection. */
int inhibit_iso_escape_detection;
/* Flag to inhibit detection of binary files through null bytes. */
int inhibit_null_byte_detection;
/* Flag to make buffer-file-coding-system inherit from process-coding. */
int inherit_process_coding_system;
......@@ -5906,7 +5909,7 @@ detect_coding (coding)
break;
}
}
else if (! c)
else if (! c && !inhibit_null_byte_detection)
{
null_byte_found = 1;
if (eight_bit_found)
......@@ -7790,7 +7793,7 @@ detect_coding_system (src, src_chars, src_bytes, highest, multibytep,
break;
}
}
else if (! c)
else if (! c && !inhibit_null_byte_detection)
{
null_byte_found = 1;
if (eight_bit_found)
......@@ -10295,18 +10298,18 @@ called even if `coding-system-for-write' is non-nil. The command
DEFVAR_BOOL ("inhibit-iso-escape-detection",
&inhibit_iso_escape_detection,
doc: /*
If non-nil, Emacs ignores ISO2022's escape sequence on code detection.
If non-nil, Emacs ignores ISO-2022 escape sequences during code detection.
By default, on reading a file, Emacs tries to detect how the text is
encoded. This code detection is sensitive to escape sequences. If
the sequence is valid as ISO2022, the code is determined as one of
the ISO2022 encodings, and the file is decoded by the corresponding
coding system (e.g. `iso-2022-7bit').
When Emacs reads text, it tries to detect how the text is encoded.
This code detection is sensitive to escape sequences. If Emacs sees
a valid ISO-2022 escape sequence, it assumes the text is encoded in one
of the ISO2022 encodings, and decodes text by the corresponding coding
system (e.g. `iso-2022-7bit').
However, there may be a case that you want to read escape sequences in
a file as is. In such a case, you can set this variable to non-nil.
Then, as the code detection ignores any escape sequences, no file is
detected as encoded in some ISO2022 encoding. The result is that all
Then the code detection will ignore any escape sequences, and no text is
detected as encoded in some ISO-2022 encoding. The result is that all
escape sequences become visible in a buffer.
The default value is nil, and it is strongly recommended not to change
......@@ -10316,10 +10319,23 @@ in Emacs's distribution, and they won't be decoded correctly on
reading if you suppress escape sequence detection.
The other way to read escape sequences in a file without decoding is
to explicitly specify some coding system that doesn't use ISO2022's
to explicitly specify some coding system that doesn't use ISO-2022
escape sequence (e.g `latin-1') on reading by \\[universal-coding-system-argument]. */);
inhibit_iso_escape_detection = 0;
DEFVAR_BOOL ("inhibit-null-byte-detection",
&inhibit_null_byte_detection,
doc: /* If non-nil, Emacs ignores null bytes on code detection.
By default, Emacs treats it as binary data, and does not attempt to
decode it. The effect is as if you specified `no-conversion' for
reading that text.
Set this to non-nil when a regular text happens to include null bytes.
Examples are Index nodes of Info files and null-byte delimited output
from GNU Find and GNU Grep. Emacs will then ignore the null bytes and
decode text as usual. */);
inhibit_null_byte_detection = 0;
DEFVAR_LISP ("translation-table-for-input", &Vtranslation_table_for_input,
doc: /* Char table for translating self-inserting characters.
This is applied to the result of input methods, not their input.
......
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