Use GPtrArray to store editor buffers.
Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
Этот коммит содержится в:
Andrew Borodin
родитель
60fe43d932
Коммит
7facc1da05
@ -95,11 +95,10 @@
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*
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* @return NULL if byte_index is negative or larger than file size; pointer to byte otherwise.
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*/
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static char *
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edit_buffer_get_byte_ptr (const edit_buffer_t * buf, off_t byte_index)
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{
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unsigned char *b;
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void *b;
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if (byte_index >= (buf->curs1 + buf->curs2) || byte_index < 0)
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return NULL;
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@ -109,12 +108,12 @@ edit_buffer_get_byte_ptr (const edit_buffer_t * buf, off_t byte_index)
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off_t p;
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p = buf->curs1 + buf->curs2 - byte_index - 1;
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b = buf->buffers2[p >> S_EDIT_BUF_SIZE];
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return (char *) &b[EDIT_BUF_SIZE - 1 - (p & M_EDIT_BUF_SIZE)];
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b = g_ptr_array_index (buf->buffers2, p >> S_EDIT_BUF_SIZE);
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return (char *) b + EDIT_BUF_SIZE - 1 - (p & M_EDIT_BUF_SIZE);
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}
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b = buf->buffers1[byte_index >> S_EDIT_BUF_SIZE];
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return (char *) &b[byte_index & M_EDIT_BUF_SIZE];
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b = g_ptr_array_index (buf->buffers1, byte_index >> S_EDIT_BUF_SIZE);
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return (char *) b + (byte_index & M_EDIT_BUF_SIZE);
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}
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/* --------------------------------------------------------------------------------------------- */
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@ -129,11 +128,11 @@ edit_buffer_get_byte_ptr (const edit_buffer_t * buf, off_t byte_index)
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void
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edit_buffer_init (edit_buffer_t * buf)
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{
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memset (buf->buffers1, 0, sizeof (buf->buffers1));
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memset (buf->buffers2, 0, sizeof (buf->buffers2));
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buf->buffers1 = g_ptr_array_sized_new (MAXBUFF + 1);
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buf->buffers2 = g_ptr_array_sized_new (MAXBUFF + 1);
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buf->curs1 = 0;
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buf->curs2 = 0;
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buf->buffers2[0] = g_malloc0 (EDIT_BUF_SIZE);
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}
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/* --------------------------------------------------------------------------------------------- */
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@ -146,12 +145,16 @@ edit_buffer_init (edit_buffer_t * buf)
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void
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edit_buffer_clean (edit_buffer_t * buf)
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{
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size_t j;
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for (j = 0; j <= MAXBUFF; j++)
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if (buf->buffers1 != NULL)
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{
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g_free (buf->buffers1[j]);
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g_free (buf->buffers2[j]);
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g_ptr_array_foreach (buf->buffers1, (GFunc) g_free, NULL);
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g_ptr_array_free (buf->buffers1, TRUE);
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}
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if (buf->buffers2 != NULL)
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{
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g_ptr_array_foreach (buf->buffers2, (GFunc) g_free, NULL);
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g_ptr_array_free (buf->buffers2, TRUE);
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}
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}
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@ -311,16 +314,18 @@ edit_buffer_get_prev_utf (const edit_buffer_t * buf, off_t byte_index, int *char
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void
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edit_buffer_insert (edit_buffer_t * buf, int c)
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{
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void *b;
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off_t i;
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i = buf->curs1 & M_EDIT_BUF_SIZE;
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/* add a new buffer if we've reached the end of the last one */
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if (i == 0)
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buf->buffers1[buf->curs1 >> S_EDIT_BUF_SIZE] = g_malloc0 (EDIT_BUF_SIZE);
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g_ptr_array_add (buf->buffers1, g_malloc0 (EDIT_BUF_SIZE));
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/* perform the insertion */
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buf->buffers1[buf->curs1 >> S_EDIT_BUF_SIZE][i] = (unsigned char) c;
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b = g_ptr_array_index (buf->buffers1, buf->curs1 >> S_EDIT_BUF_SIZE);
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*((unsigned char *) b + i) = (unsigned char) c;
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/* update cursor position */
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buf->curs1++;
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@ -338,16 +343,18 @@ edit_buffer_insert (edit_buffer_t * buf, int c)
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void
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edit_buffer_insert_ahead (edit_buffer_t * buf, int c)
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{
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void *b;
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off_t i;
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i = buf->curs2 & M_EDIT_BUF_SIZE;
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/* add a new buffer if we've reached the end of the last one */
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if (((buf->curs2 + 1) & M_EDIT_BUF_SIZE) == 0)
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buf->buffers2[(buf->curs2 + 1) >> S_EDIT_BUF_SIZE] = g_malloc0 (EDIT_BUF_SIZE);
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if (i == 0)
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g_ptr_array_add (buf->buffers2, g_malloc0 (EDIT_BUF_SIZE));
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/* perform the insertion */
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buf->buffers2[buf->curs2 >> S_EDIT_BUF_SIZE][EDIT_BUF_SIZE - 1 - i] = (unsigned char) c;
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b = g_ptr_array_index (buf->buffers2, buf->curs2 >> S_EDIT_BUF_SIZE);
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*((unsigned char *) b + EDIT_BUF_SIZE - 1 - i) = (unsigned char) c;
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/* update cursor position */
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buf->curs2++;
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@ -365,19 +372,23 @@ edit_buffer_insert_ahead (edit_buffer_t * buf, int c)
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int
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edit_buffer_delete (edit_buffer_t * buf)
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{
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void *b;
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unsigned char c;
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off_t prev;
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off_t i;
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prev = buf->curs2 - 1;
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b = g_ptr_array_index (buf->buffers2, prev >> S_EDIT_BUF_SIZE);
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i = prev & M_EDIT_BUF_SIZE;
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c = buf->buffers2[prev >> S_EDIT_BUF_SIZE][EDIT_BUF_SIZE - 1 - i];
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c = *((unsigned char *) b + EDIT_BUF_SIZE - 1 - i);
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if ((buf->curs2 & M_EDIT_BUF_SIZE) == 0)
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if (i == 0)
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{
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g_free (buf->buffers2[buf->curs2 >> S_EDIT_BUF_SIZE]);
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buf->buffers2[buf->curs2 >> S_EDIT_BUF_SIZE] = NULL;
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i = buf->buffers2->len - 1;
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b = g_ptr_array_index (buf->buffers2, i);
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g_ptr_array_remove_index (buf->buffers2, i);
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g_free (b);
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}
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buf->curs2 = prev;
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@ -397,19 +408,23 @@ edit_buffer_delete (edit_buffer_t * buf)
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int
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edit_buffer_backspace (edit_buffer_t * buf)
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{
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void *b;
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unsigned char c;
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off_t prev;
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off_t i;
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prev = buf->curs1 - 1;
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b = g_ptr_array_index (buf->buffers1, prev >> S_EDIT_BUF_SIZE);
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i = prev & M_EDIT_BUF_SIZE;
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c = buf->buffers1[prev >> S_EDIT_BUF_SIZE][i];
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c = *((unsigned char *) b + i);
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if (i == 0)
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{
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g_free (buf->buffers1[buf->curs1 >> S_EDIT_BUF_SIZE]);
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buf->buffers1[buf->curs1 >> S_EDIT_BUF_SIZE] = NULL;
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i = buf->buffers1->len - 1;
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b = g_ptr_array_index (buf->buffers1, i);
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g_ptr_array_remove_index (buf->buffers1, i);
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g_free (b);
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}
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buf->curs1 = prev;
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@ -431,21 +446,25 @@ edit_buffer_backspace (edit_buffer_t * buf)
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off_t
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edit_buffer_read_file (edit_buffer_t * buf, int fd, off_t size)
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{
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off_t ret;
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off_t ret = 0;
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off_t i;
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off_t data_size;
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void *b;
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buf->curs2 = size;
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i = buf->curs2 >> S_EDIT_BUF_SIZE;
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if (buf->buffers2[i] == NULL)
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buf->buffers2[i] = g_malloc0 (EDIT_BUF_SIZE);
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/* fill last part of buffers2 */
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data_size = buf->curs2 & M_EDIT_BUF_SIZE;
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ret = mc_read (fd, (char *) buf->buffers2[i] + EDIT_BUF_SIZE - data_size, data_size);
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if (ret < 0 || ret != data_size)
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return ret;
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if (data_size != 0)
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{
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b = g_malloc0 (EDIT_BUF_SIZE);
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g_ptr_array_add (buf->buffers2, b);
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ret = mc_read (fd, (char *) b + EDIT_BUF_SIZE - data_size, data_size);
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if (ret < 0 || ret != data_size)
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return ret;
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}
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/* fullfill other parts of buffers2 from end to begin */
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data_size = EDIT_BUF_SIZE;
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@ -453,16 +472,28 @@ edit_buffer_read_file (edit_buffer_t * buf, int fd, off_t size)
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{
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off_t sz;
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/* edit->buffers2[0] is already allocated */
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if (buf->buffers2[i] == NULL)
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buf->buffers2[i] = g_malloc0 (data_size);
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sz = mc_read (fd, (char *) buf->buffers2[i], data_size);
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b = g_malloc0 (data_size);
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g_ptr_array_add (buf->buffers2, b);
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sz = mc_read (fd, b, data_size);
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if (sz >= 0)
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ret += sz;
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if (sz != data_size)
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break;
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}
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/* reverse buffer */
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for (i = 0; i < buf->buffers2->len / 2; i++)
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{
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void **b1, **b2;
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b1 = &g_ptr_array_index (buf->buffers2, i);
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b2 = &g_ptr_array_index (buf->buffers2, buf->buffers2->len - 1 - i);
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b = *b1;
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*b1 = *b2;
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*b2 = b;
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}
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return ret;
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}
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@ -482,62 +513,59 @@ edit_buffer_write_file (edit_buffer_t * buf, int fd)
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off_t ret = 0;
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off_t i;
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off_t data_size, sz;
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void *b;
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/* write all fullfilled parts of buffers1 from begin to end */
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data_size = EDIT_BUF_SIZE;
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for (i = 0; i < buf->curs1 >> S_EDIT_BUF_SIZE; i++)
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if (buf->buffers1->len != 0)
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{
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sz = mc_write (fd, (char *) buf->buffers1[i], data_size);
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data_size = EDIT_BUF_SIZE;
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for (i = 0; i < (off_t) buf->buffers1->len - 1; i++)
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{
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b = g_ptr_array_index (buf->buffers1, i);
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sz = mc_write (fd, b, data_size);
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if (sz >= 0)
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ret += sz;
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else if (i == 0)
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ret = sz;
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if (sz != data_size)
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return ret;
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}
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/* write last partially filled part of buffers1 */
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data_size = ((buf->curs1 - 1) & M_EDIT_BUF_SIZE) + 1;
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b = g_ptr_array_index (buf->buffers1, i);
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sz = mc_write (fd, b, data_size);
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if (sz >= 0)
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ret += sz;
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else if (i == 0)
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ret = sz;
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if (sz != data_size)
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return ret;
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}
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/* write last partially filled part of buffers1 */
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data_size = buf->curs1 & M_EDIT_BUF_SIZE;
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if (data_size != 0)
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{
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sz = mc_write (fd, (char *) buf->buffers1[i], data_size);
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if (sz >= 0)
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ret += sz;
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if (sz != data_size)
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return ret;
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}
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/* write buffers2 from end to begin, if buffers2 contains some data */
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if (buf->curs2 != 0)
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if (buf->buffers2->len != 0)
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{
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buf->curs2--;
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/* write last partially filled part of buffers2 */
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i = buf->curs2 >> S_EDIT_BUF_SIZE;
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data_size = (buf->curs2 & M_EDIT_BUF_SIZE) + 1;
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sz = mc_write (fd, (char *) buf->buffers2[i] + EDIT_BUF_SIZE - data_size, data_size);
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i = buf->buffers2->len - 1;
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b = g_ptr_array_index (buf->buffers2, i);
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data_size = ((buf->curs2 - 1) & M_EDIT_BUF_SIZE) + 1;
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sz = mc_write (fd, (char *) b + EDIT_BUF_SIZE - data_size, data_size);
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if (sz >= 0)
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ret += sz;
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if (sz == data_size)
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{
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data_size = EDIT_BUF_SIZE;
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/* write other fullfilled parts of buffers2 from end to begin */
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data_size = EDIT_BUF_SIZE;
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while (--i >= 0)
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{
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sz = mc_write (fd, (char *) buf->buffers2[i], data_size);
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b = g_ptr_array_index (buf->buffers2, i);
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sz = mc_write (fd, b, data_size);
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if (sz >= 0)
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ret += sz;
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if (sz != data_size)
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break;
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}
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}
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buf->curs2++;
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}
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return ret;
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@ -41,8 +41,8 @@
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typedef struct edit_buffer_struct {
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off_t curs1; /* position of the cursor from the beginning of the file. */
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off_t curs2; /* position from the end of the file */
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unsigned char *buffers1[MAXBUFF + 1]; /* all data up to curs1 */
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unsigned char *buffers2[MAXBUFF + 1]; /* all data from end of file down to curs2 */
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GPtrArray *buffers1; /* all data up to curs1 */
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GPtrArray *buffers2; /* all data from end of file down to curs2 */
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} edit_buffer_t;
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/*** global variables defined in .c file *********************************************************/
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