return (src_bytes * magnification + CONVERSION_BUFFER_EXTRA_ROOM);
}
-#ifndef MINIMUM_CONVERSION_BUFFER_SIZE
-#define MINIMUM_CONVERSION_BUFFER_SIZE 1024
-#endif
+/* Working buffer for code conversion. */
+struct conversion_buffer
+{
+ int size; /* size of data. */
+ int on_stack; /* 1 if allocated by alloca. */
+ unsigned char *data;
+};
-char *conversion_buffer;
-int conversion_buffer_size;
+/* Don't use alloca for allocating memory space larger than this, lest
+ we overflow their stack. */
+#define MAX_ALLOCA 16*1024
-/* Return a pointer to a SIZE bytes of buffer to be used for encoding
- or decoding. Sufficient memory is allocated automatically. If we
- run out of memory, return NULL. */
+/* Allocate LEN bytes of memory for BUF (struct conversion_buffer). */
+#define allocate_conversion_buffer(buf, len) \
+ do { \
+ if (len < MAX_ALLOCA) \
+ { \
+ buf.data = (unsigned char *) alloca (len); \
+ buf.on_stack = 1; \
+ } \
+ else \
+ { \
+ buf.data = (unsigned char *) xmalloc (len); \
+ buf.on_stack = 0; \
+ } \
+ buf.size = len; \
+ } while (0)
-char *
-get_conversion_buffer (size)
- int size;
+/* Double the allocated memory for *BUF. */
+static void
+extend_conversion_buffer (buf)
+ struct conversion_buffer *buf;
{
- if (size > conversion_buffer_size)
+ if (buf->on_stack)
{
- char *buf;
- int real_size = conversion_buffer_size * 2;
-
- while (real_size < size) real_size *= 2;
- buf = (char *) xmalloc (real_size);
- xfree (conversion_buffer);
- conversion_buffer = buf;
- conversion_buffer_size = real_size;
+ unsigned char *save = buf->data;
+ buf->data = (unsigned char *) xmalloc (buf->size * 2);
+ bcopy (save, buf->data, buf->size);
+ buf->on_stack = 0;
}
- return conversion_buffer;
+ else
+ {
+ buf->data = (unsigned char *) xrealloc (buf->data, buf->size * 2);
+ }
+ buf->size *= 2;
+}
+
+/* Free the allocated memory for BUF if it is not on stack. */
+static void
+free_conversion_buffer (buf)
+ struct conversion_buffer *buf;
+{
+ if (!buf->on_stack)
+ xfree (buf->data);
}
int
switch (ccl->status)
{
case CCL_STAT_SUSPEND_BY_SRC:
- result = CODING_FINISH_INSUFFICIENT_SRC;
+ coding->result = CODING_FINISH_INSUFFICIENT_SRC;
break;
case CCL_STAT_SUSPEND_BY_DST:
- result = CODING_FINISH_INSUFFICIENT_DST;
+ coding->result = CODING_FINISH_INSUFFICIENT_DST;
break;
case CCL_STAT_QUIT:
case CCL_STAT_INVALID_CMD:
- result = CODING_FINISH_INTERRUPT;
+ coding->result = CODING_FINISH_INTERRUPT;
break;
default:
- result = CODING_FINISH_NORMAL;
+ coding->result = CODING_FINISH_NORMAL;
break;
}
- return result;
+ return coding->result;
}
/* Decode EOL format of the text at PTR of BYTES length destructively
}
coding->consumed = coding->consumed_char = src - source;
coding->produced = dst - destination;
+ coding->result = CODING_FINISH_NORMAL;
}
if (!coding->dst_multibyte)
&& coding->consumed == src_bytes)
coding->result = CODING_FINISH_NORMAL;
- if (coding->mode & CODING_MODE_LAST_BLOCK)
+ if (coding->mode & CODING_MODE_LAST_BLOCK
+ && coding->result == CODING_FINISH_INSUFFICIENT_SRC)
{
unsigned char *src = source + coding->consumed;
unsigned char *src_end = src + src_bytes;
coding->consumed = src_bytes;
}
coding->produced = coding->produced_char = dst - destination;
+ coding->result = CODING_FINISH_NORMAL;
}
return coding->result;
int nocopy;
{
int len;
- char *buf;
+ struct conversion_buffer buf;
int from, to, to_byte;
struct gcpro gcpro1;
Lisp_Object saved_coding_symbol;
int result;
int require_decoding;
+ int shrinked_bytes = 0;
+ Lisp_Object newstr;
+ int consumed, produced, produced_char;
from = 0;
to = XSTRING (str)->size;
/* Try to skip the heading and tailing ASCIIs. */
if (require_decoding && coding->type != coding_type_ccl)
{
- int from_orig = from;
-
SHRINK_CONVERSION_REGION (&from, &to_byte, coding, XSTRING (str)->data,
0);
if (from == to_byte)
require_decoding = 0;
+ shrinked_bytes = from + (STRING_BYTES (XSTRING (str)) - to_byte);
}
if (!require_decoding)
if (coding->composing != COMPOSITION_DISABLED)
coding_allocate_composition_data (coding, from);
-
len = decoding_buffer_size (coding, to_byte - from);
- len += from + STRING_BYTES (XSTRING (str)) - to_byte;
- GCPRO1 (str);
- buf = get_conversion_buffer (len);
- UNGCPRO;
+ allocate_conversion_buffer (buf, len);
- if (from > 0)
- bcopy (XSTRING (str)->data, buf, from);
- result = decode_coding (coding, XSTRING (str)->data + from,
- buf + from, to_byte - from, len);
- if (result == CODING_FINISH_INCONSISTENT_EOL)
+ consumed = produced = produced_char = 0;
+ while (1)
{
- /* We simply try to decode the whole string again but without
- eol-conversion this time. */
- coding->eol_type = CODING_EOL_LF;
- coding->symbol = saved_coding_symbol;
- coding_free_composition_data (coding);
- return decode_coding_string (str, coding, nocopy);
+ result = decode_coding (coding, XSTRING (str)->data + from + consumed,
+ buf.data + produced, to_byte - from - consumed,
+ buf.size - produced);
+ consumed += coding->consumed;
+ produced += coding->produced;
+ produced_char += coding->produced_char;
+ if (result == CODING_FINISH_NORMAL)
+ break;
+ if (result == CODING_FINISH_INSUFFICIENT_CMP)
+ coding_allocate_composition_data (coding, from + produced_char);
+ else if (result == CODING_FINISH_INSUFFICIENT_DST)
+ extend_conversion_buffer (&buf);
+ else if (result == CODING_FINISH_INCONSISTENT_EOL)
+ {
+ /* Recover the original EOL format. */
+ if (coding->eol_type == CODING_EOL_CR)
+ {
+ unsigned char *p;
+ for (p = buf.data; p < buf.data + produced; p++)
+ if (*p == '\n') *p = '\r';
+ }
+ else if (coding->eol_type == CODING_EOL_CRLF)
+ {
+ int num_eol = 0;
+ unsigned char *p0, *p1;
+ for (p0 = buf.data, p1 = p0 + produced; p0 < p1; p0++)
+ if (*p0 == '\n') num_eol++;
+ if (produced + num_eol >= buf.size)
+ extend_conversion_buffer (&buf);
+ for (p0 = buf.data + produced, p1 = p0 + num_eol; p0 > buf.data;)
+ {
+ *--p1 = *--p0;
+ if (*p0 == '\n') *--p1 = '\r';
+ }
+ produced += num_eol;
+ produced_char += num_eol;
+ }
+ coding->eol_type = CODING_EOL_LF;
+ coding->symbol = saved_coding_symbol;
+ }
}
- bcopy (XSTRING (str)->data + to_byte, buf + from + coding->produced,
- STRING_BYTES (XSTRING (str)) - to_byte);
-
- len = from + STRING_BYTES (XSTRING (str)) - to_byte;
if (coding->dst_multibyte)
- str = make_multibyte_string (buf, len + coding->produced_char,
- len + coding->produced);
+ newstr = make_uninit_multibyte_string (produced_char + shrinked_bytes,
+ produced + shrinked_bytes);
else
- str = make_unibyte_string (buf, len + coding->produced);
+ newstr = make_uninit_string (produced + shrinked_bytes);
+ if (from > 0)
+ bcopy (XSTRING (str)->data, XSTRING (newstr)->data, from);
+ bcopy (buf.data, XSTRING (newstr)->data + from, produced);
+ if (shrinked_bytes > from)
+ bcopy (XSTRING (str)->data + to_byte,
+ XSTRING (newstr)->data + from + produced,
+ shrinked_bytes - from);
+ free_conversion_buffer (&buf);
if (coding->cmp_data && coding->cmp_data->used)
- coding_restore_composition (coding, str);
+ coding_restore_composition (coding, newstr);
coding_free_composition_data (coding);
if (SYMBOLP (coding->post_read_conversion)
&& !NILP (Ffboundp (coding->post_read_conversion)))
- str = run_pre_post_conversion_on_str (str, coding, 0);
+ newstr = run_pre_post_conversion_on_str (newstr, coding, 0);
- return str;
+ return newstr;
}
Lisp_Object
int nocopy;
{
int len;
- char *buf;
+ struct conversion_buffer buf;
int from, to, to_byte;
struct gcpro gcpro1;
Lisp_Object saved_coding_symbol;
int result;
+ int shrinked_bytes = 0;
+ Lisp_Object newstr;
+ int consumed, consumed_char, produced;
if (SYMBOLP (coding->pre_write_conversion)
&& !NILP (Ffboundp (coding->pre_write_conversion)))
/* Try to skip the heading and tailing ASCIIs. */
if (coding->type != coding_type_ccl)
{
- int from_orig = from;
-
SHRINK_CONVERSION_REGION (&from, &to_byte, coding, XSTRING (str)->data,
1);
if (from == to_byte)
return (nocopy ? str : Fcopy_sequence (str));
+ shrinked_bytes = from + (STRING_BYTES (XSTRING (str)) - to_byte);
}
len = encoding_buffer_size (coding, to_byte - from);
- len += from + STRING_BYTES (XSTRING (str)) - to_byte;
- GCPRO1 (str);
- buf = get_conversion_buffer (len);
- UNGCPRO;
+ allocate_conversion_buffer (buf, len);
+
+ consumed = consumed_char = produced = 0;
+
+ while (1)
+ {
+ result = encode_coding (coding, XSTRING (str)->data + from + consumed,
+ buf.data + produced, to_byte - from - consumed,
+ buf.size - produced);
+ consumed += coding->consumed;
+ produced += coding->produced;
+ if (result == CODING_FINISH_NORMAL)
+ break;
+ /* Now result should be CODING_FINISH_INSUFFICIENT_DST. */
+ extend_conversion_buffer (&buf);
+ }
+ newstr = make_uninit_string (produced + shrinked_bytes);
if (from > 0)
- bcopy (XSTRING (str)->data, buf, from);
- result = encode_coding (coding, XSTRING (str)->data + from,
- buf + from, to_byte - from, len);
- bcopy (XSTRING (str)->data + to_byte, buf + from + coding->produced,
- STRING_BYTES (XSTRING (str)) - to_byte);
-
- len = from + STRING_BYTES (XSTRING (str)) - to_byte;
- str = make_unibyte_string (buf, len + coding->produced);
+ bcopy (XSTRING (str)->data, XSTRING (newstr)->data, from);
+ bcopy (buf.data, XSTRING (newstr)->data + from, produced);
+ if (shrinked_bytes > from)
+ bcopy (XSTRING (str)->data + to_byte,
+ XSTRING (newstr)->data + from + produced,
+ shrinked_bytes - from);
+
+ free_conversion_buffer (&buf);
coding_free_composition_data (coding);
- return str;
+ return newstr;
}
\f
\f
/*** 9. Post-amble ***/
-void
-init_coding ()
-{
- conversion_buffer = (char *) xmalloc (MINIMUM_CONVERSION_BUFFER_SIZE);
-}
-
void
init_coding_once ()
{
iso_code_class[ISO_CODE_SS3] = ISO_single_shift_3;
iso_code_class[ISO_CODE_CSI] = ISO_control_sequence_introducer;
- conversion_buffer_size = MINIMUM_CONVERSION_BUFFER_SIZE;
-
setup_coding_system (Qnil, &keyboard_coding);
setup_coding_system (Qnil, &terminal_coding);
setup_coding_system (Qnil, &safe_terminal_coding);
projects / emacs.git / commitdiff