/* These macros come in pairs, one for the char position
and one for the byte position. */
-/* Position of beginning of buffer. */
+/* Position of beginning of buffer. */
#define BEG (1)
#define BEG_BYTE (1)
-/* Position of beginning of accessible range of buffer. */
+/* Position of beginning of accessible range of buffer. */
#define BEGV (current_buffer->begv)
#define BEGV_BYTE (current_buffer->begv_byte)
/* Position of point in buffer. The "+ 0" makes this
- not an l-value, so you can't assign to it. Use SET_PT instead. */
+ not an l-value, so you can't assign to it. Use SET_PT instead. */
#define PT (current_buffer->pt + 0)
#define PT_BYTE (current_buffer->pt_byte + 0)
-/* Position of gap in buffer. */
+/* Position of gap in buffer. */
#define GPT (current_buffer->text->gpt)
#define GPT_BYTE (current_buffer->text->gpt_byte)
-/* Position of end of accessible range of buffer. */
+/* Position of end of accessible range of buffer. */
#define ZV (current_buffer->zv)
#define ZV_BYTE (current_buffer->zv_byte)
-/* Position of end of buffer. */
+/* Position of end of buffer. */
#define Z (current_buffer->text->z)
#define Z_BYTE (current_buffer->text->z_byte)
/* Macros for the addresses of places in the buffer. */
-/* Address of beginning of buffer. */
+/* Address of beginning of buffer. */
#define BEG_ADDR (current_buffer->text->beg)
-/* Address of beginning of accessible range of buffer. */
+/* Address of beginning of accessible range of buffer. */
#define BEGV_ADDR (BYTE_POS_ADDR (current_buffer->begv_byte))
-/* Address of point in buffer. */
+/* Address of point in buffer. */
#define PT_ADDR (BYTE_POS_ADDR (current_buffer->pt_byte))
-/* Address of beginning of gap in buffer. */
+/* Address of beginning of gap in buffer. */
#define GPT_ADDR (current_buffer->text->beg + current_buffer->text->gpt_byte - 1)
/* Address of end of gap in buffer. */
#define GAP_END_ADDR (current_buffer->text->beg + current_buffer->text->gpt_byte + current_buffer->text->gap_size - 1)
-/* Address of end of accessible range of buffer. */
+/* Address of end of accessible range of buffer. */
#define ZV_ADDR (BYTE_POS_ADDR (current_buffer->zv_byte))
-/* Address of end of buffer. */
+/* Address of end of buffer. */
#define Z_ADDR (current_buffer->text->beg + current_buffer->text->gap_size + current_buffer->text->z_byte - 1)
/* Size of gap. */
/* Similar macros to operate on a specified buffer.
Note that many of these evaluate the buffer argument more than once. */
-/* Position of beginning of buffer. */
+/* Position of beginning of buffer. */
#define BUF_BEG(buf) (1)
#define BUF_BEG_BYTE(buf) (1)
-/* Position of beginning of accessible range of buffer. */
+/* Position of beginning of accessible range of buffer. */
#define BUF_BEGV(buf) ((buf)->begv)
#define BUF_BEGV_BYTE(buf) ((buf)->begv_byte)
-/* Position of point in buffer. */
+/* Position of point in buffer. */
#define BUF_PT(buf) ((buf)->pt)
#define BUF_PT_BYTE(buf) ((buf)->pt_byte)
-/* Position of gap in buffer. */
+/* Position of gap in buffer. */
#define BUF_GPT(buf) ((buf)->text->gpt)
#define BUF_GPT_BYTE(buf) ((buf)->text->gpt_byte)
-/* Position of end of accessible range of buffer. */
+/* Position of end of accessible range of buffer. */
#define BUF_ZV(buf) ((buf)->zv)
#define BUF_ZV_BYTE(buf) ((buf)->zv_byte)
-/* Position of end of buffer. */
+/* Position of end of buffer. */
#define BUF_Z(buf) ((buf)->text->z)
#define BUF_Z_BYTE(buf) ((buf)->text->z_byte)
} \
} \
while (0)
-
+
\f
/* Macros to set PT in the current buffer, or another buffer. */
or converting between byte positions and addresses,
in a specified buffer. */
-/* Return the address of character at byte position POS in buffer BUF.
+/* Return the address of character at byte position POS in buffer BUF.
Note that both arguments can be computed more than once. */
#define BUF_BYTE_ADDRESS(buf, pos) \
((buf)->text->beg + (pos) - 1 \
+ ((pos) >= (buf)->text->gpt_byte ? (buf)->text->gap_size : 0))
-/* Return the address of character at char position POS in buffer BUF.
+/* Return the address of character at char position POS in buffer BUF.
Note that both arguments can be computed more than once. */
#define BUF_CHAR_ADDRESS(buf, pos) \
e.g. happen when malloc is called. So, don't pass a pointer
into a buffer's text to functions that malloc. */
unsigned char *beg;
-
+
int gpt; /* Char pos of gap in buffer. */
int z; /* Char pos of end of buffer. */
int gpt_byte; /* Byte pos of gap in buffer. */
this means the variable is always local in all buffers. */
#define MAX_PER_BUFFER_VARS 50
char local_flags[MAX_PER_BUFFER_VARS];
-
+
/* Set to the modtime of the visited file when read or written.
-1 means visited file was nonexistent.
0 means visited file modtime unknown; in no case complain
So we copy it around in set_buffer_internal.
This comes before `name' because it is marked in a special way. */
Lisp_Object undo_list;
-
+
/* Analogous to mode_line_format for the line displayed at the top
of windows. Nil means don't display that line. */
Lisp_Object header_line_format;
/* Incremented each time the buffer is displayed in a window. */
Lisp_Object display_count;
-
+
/* Widths of left and right marginal areas for windows displaying
this buffer. */
Lisp_Object left_margin_width, right_margin_width;
that point ends up this number of lines from the top of the
window. Nil means that scrolling method isn't used. */
Lisp_Object scroll_up_aggressively;
-
+
/* If scrolling the display because point is above the top of a
window showing this buffer, try to choose a window start so
that point ends up this number of lines from the bottom of the