diff options
Diffstat (limited to 'src/buffer.c')
| -rw-r--r-- | src/buffer.c | 42 |
1 files changed, 29 insertions, 13 deletions
diff --git a/src/buffer.c b/src/buffer.c index fcb842de83c..6115f727deb 100644 --- a/src/buffer.c +++ b/src/buffer.c @@ -42,7 +42,7 @@ extern int errno; #include "window.h" #include "commands.h" #include "buffer.h" -#include "charset.h" +#include "character.h" #include "region-cache.h" #include "indent.h" #include "blockinput.h" @@ -181,6 +181,7 @@ static struct Lisp_Overlay * copy_overlays P_ ((struct buffer *, struct Lisp_Ove static void modify_overlay P_ ((struct buffer *, EMACS_INT, EMACS_INT)); static Lisp_Object buffer_lisp_local_variables P_ ((struct buffer *)); +extern char * emacs_strerror P_ ((int)); /* For debugging; temporary. See set_buffer_internal. */ /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ @@ -2103,8 +2104,10 @@ DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, doc: /* Set the multibyte flag of the current buffer to FLAG. If FLAG is t, this makes the buffer a multibyte buffer. If FLAG is nil, this makes the buffer a single-byte buffer. -The buffer contents remain unchanged as a sequence of bytes -but the contents viewed as characters do change. +In these cases, the buffer contents remain unchanged as a sequence of +bytes but the contents viewed as characters do change. +If FLAG is `to', this makes the buffer a multibyte buffer by changing +all eight-bit bytes to eight-bit characters. If the multibyte flag was really changed, undo information of the current buffer is cleared. */) (flag) @@ -2176,11 +2179,11 @@ current buffer is cleared. */) p = GAP_END_ADDR; stop = Z; } - if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) - p += bytes, pos += bytes; - else + if (ASCII_BYTE_P (*p)) + p++, pos++; + else if (CHAR_BYTE8_HEAD_P (*p)) { - c = STRING_CHAR (p, stop - pos); + c = STRING_CHAR_AND_LENGTH (p, stop - pos, bytes); /* Delete all bytes for this 8-bit character but the last one, and change the last one to the charcter code. */ @@ -2195,6 +2198,11 @@ current buffer is cleared. */) zv -= bytes; stop = Z; } + else + { + bytes = BYTES_BY_CHAR_HEAD (*p); + p += bytes, pos += bytes; + } } if (narrowed) Fnarrow_to_region (make_number (begv), make_number (zv)); @@ -2203,13 +2211,14 @@ current buffer is cleared. */) { int pt = PT; int pos, stop; - unsigned char *p; + unsigned char *p, *pend; /* Be sure not to have a multibyte sequence striding over the GAP. - Ex: We change this: "...abc\201 _GAP_ \241def..." - to: "...abc _GAP_ \201\241def..." */ + Ex: We change this: "...abc\302 _GAP_ \241def..." + to: "...abc _GAP_ \302\241def..." */ - if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE + if (EQ (flag, Qt) + && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE && ! CHAR_HEAD_P (*(GAP_END_ADDR))) { unsigned char *p = GPT_ADDR - 1; @@ -2228,6 +2237,7 @@ current buffer is cleared. */) pos = BEG; stop = GPT; p = BEG_ADDR; + pend = GPT_ADDR; while (1) { int bytes; @@ -2237,16 +2247,21 @@ current buffer is cleared. */) if (pos == Z) break; p = GAP_END_ADDR; + pend = Z_ADDR; stop = Z; } - if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) + if (ASCII_BYTE_P (*p)) + p++, pos++; + else if (EQ (flag, Qt) && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) p += bytes, pos += bytes; else { unsigned char tmp[MAX_MULTIBYTE_LENGTH]; + int c; - bytes = CHAR_STRING (*p, tmp); + c = BYTE8_TO_CHAR (*p); + bytes = CHAR_STRING (c, tmp); *p = tmp[0]; TEMP_SET_PT_BOTH (pos + 1, pos + 1); bytes--; @@ -2260,6 +2275,7 @@ current buffer is cleared. */) zv += bytes; if (pos <= pt) pt += bytes; + pend = Z_ADDR; stop = Z; } } |