diff options
Diffstat (limited to 'src/decompress.c')
| -rw-r--r-- | src/decompress.c | 56 |
1 files changed, 44 insertions, 12 deletions
diff --git a/src/decompress.c b/src/decompress.c index a24b9f0678e..4ca6a50b2a2 100644 --- a/src/decompress.c +++ b/src/decompress.c @@ -24,11 +24,13 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */ #include "lisp.h" #include "buffer.h" +#include "composite.h" #include <verify.h> #ifdef WINDOWSNT # include <windows.h> +# include "w32common.h" # include "w32.h" DEF_DLL_FN (int, inflateInit2_, @@ -66,7 +68,7 @@ init_zlib_functions (void) struct decompress_unwind_data { - ptrdiff_t old_point, start, nbytes; + ptrdiff_t old_point, orig, start, nbytes; z_stream *stream; }; @@ -76,10 +78,19 @@ unwind_decompress (void *ddata) struct decompress_unwind_data *data = ddata; inflateEnd (data->stream); - /* Delete any uncompressed data already inserted on error. */ + /* Delete any uncompressed data already inserted on error, but + without calling the change hooks. */ if (data->start) - del_range (data->start, data->start + data->nbytes); - + { + del_range_2 (data->start, data->start, /* byte, char offsets the same */ + data->start + data->nbytes, data->start + data->nbytes, + 0); + update_compositions (data->start, data->start, CHECK_HEAD); + /* "Balance" the before-change-functions call, which would + otherwise be left "hanging". */ + signal_after_change (data->orig, data->start - data->orig, + data->start - data->orig); + } /* Put point where it was, or if the buffer has shrunk because the compressed data is bigger than the uncompressed, at point-max. */ @@ -109,12 +120,18 @@ DEFUN ("zlib-available-p", Fzlib_available_p, Szlib_available_p, 0, 0, 0, DEFUN ("zlib-decompress-region", Fzlib_decompress_region, Szlib_decompress_region, - 2, 2, 0, + 2, 3, 0, doc: /* Decompress a gzip- or zlib-compressed region. Replace the text in the region by the decompressed data. -On failure, return nil and leave the data in place. + +If optional parameter ALLOW-PARTIAL is nil or omitted, then on +failure, return nil and leave the data in place. Otherwise, return +the number of bytes that were not decompressed and replace the region +text by whatever data was successfully decompressed (similar to gzip). +If decompression is completely successful return t. + This function can be called only in unibyte buffers. */) - (Lisp_Object start, Lisp_Object end) + (Lisp_Object start, Lisp_Object end, Lisp_Object allow_partial) { ptrdiff_t istart, iend, pos_byte; z_stream stream; @@ -139,8 +156,12 @@ This function can be called only in unibyte buffers. */) /* This is a unibyte buffer, so character positions and bytes are the same. */ - istart = XINT (start); - iend = XINT (end); + istart = XFIXNUM (start); + iend = XFIXNUM (end); + + /* Do the following before manipulating the gap. */ + modify_text (istart, iend); + move_gap_both (iend, iend); stream.zalloc = Z_NULL; @@ -154,6 +175,7 @@ This function can be called only in unibyte buffers. */) if (inflateInit2 (&stream, MAX_WBITS + 32) != Z_OK) return Qnil; + unwind_data.orig = istart; unwind_data.start = iend; unwind_data.stream = &stream; unwind_data.old_point = PT; @@ -190,15 +212,25 @@ This function can be called only in unibyte buffers. */) } while (inflate_status == Z_OK); + Lisp_Object ret = Qt; if (inflate_status != Z_STREAM_END) - return unbind_to (count, Qnil); + { + if (!NILP (allow_partial)) + ret = make_int (iend - pos_byte); + else + return unbind_to (count, Qnil); + } unwind_data.start = 0; /* Delete the compressed data. */ - del_range (istart, iend); + del_range_2 (istart, istart, /* byte and char offsets are the same. */ + iend, iend, 0); + + signal_after_change (istart, iend - istart, unwind_data.nbytes); + update_compositions (istart, istart, CHECK_HEAD); - return unbind_to (count, Qt); + return unbind_to (count, ret); } |