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Coding system support cleanup and minor refactoring.

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* coding.h (enum coding_result_code): Remove
CODING_RESULT_INCONSISTENT_EOL and CODING_RESULT_INSUFFICIENT_MEM.
(toplevel): Remove unused CODING_MODE_INHIBIT_INCONSISTENT_EOL.
(CODING_MODE_LAST_BLOCK, CODING_MODE_SELECTIVE_DISPLAY)
(CODING_MODE_DIRECTION, CODING_MODE_FIXED_DESTINATION)
(CODING_MODE_SAFE_ENCODING): Rearrange bit values.
(decode_coding_region, encode_coding_region, decode_coding_string):
Remove unused compatibility macros.
* coding.c (Qinconsistent_eol, Qinsufficient_memory): Remove.
(record_conversion_result): Adjust user.
(syms_of_coding): Likewise.
(ALLOC_CONVERSION_WORK_AREA): Use SAFE_ALLOCA.
(decode_coding, encode_coding): Add USE_SAFE_ALLOCA and SAFE_FREE.
(decode_coding_object): Simplify since xrealloc never returns NULL.
Add eassert.
This commit is contained in:
Dmitry Antipov 2013-03-06 15:26:30 +04:00
parent 34fd7a48dd
commit 1af1a51aad
3 changed files with 37 additions and 61 deletions
Download patch file Download diff file Expand all files Collapse all files

45
src/coding.c
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@ -322,8 +322,7 @@ Lisp_Object Qcall_process, Qcall_process_region;
Lisp_Object Qstart_process, Qopen_network_stream;
static Lisp_Object Qtarget_idx;
static Lisp_Object Qinsufficient_source, Qinconsistent_eol, Qinvalid_source;
static Lisp_Object Qinterrupted, Qinsufficient_memory;
static Lisp_Object Qinsufficient_source, Qinvalid_source, Qinterrupted;
/* If a symbol has this property, evaluate the value to define the
symbol as a coding system. */
@ -820,18 +819,12 @@ record_conversion_result (struct coding_system *coding,
case CODING_RESULT_INSUFFICIENT_SRC:
Vlast_code_conversion_error = Qinsufficient_source;
break;
case CODING_RESULT_INCONSISTENT_EOL:
Vlast_code_conversion_error = Qinconsistent_eol;
break;
case CODING_RESULT_INVALID_SRC:
Vlast_code_conversion_error = Qinvalid_source;
break;
case CODING_RESULT_INTERRUPT:
Vlast_code_conversion_error = Qinterrupted;
break;
case CODING_RESULT_INSUFFICIENT_MEM:
Vlast_code_conversion_error = Qinsufficient_memory;
break;
case CODING_RESULT_INSUFFICIENT_DST:
/* Don't record this error in Vlast_code_conversion_error
because it happens just temporarily and is resolved when the
@ -6884,22 +6877,8 @@ produce_charset (struct coding_system *coding, int *charbuf, ptrdiff_t pos)
#define ALLOC_CONVERSION_WORK_AREA(coding) \
do { \
int size = CHARBUF_SIZE; \
\
coding->charbuf = NULL; \
while (size > 1024) \
{ \
coding->charbuf = alloca (sizeof (int) * size); \
if (coding->charbuf) \
break; \
size >>= 1; \
} \
if (! coding->charbuf) \
{ \
record_conversion_result (coding, CODING_RESULT_INSUFFICIENT_MEM); \
return; \
} \
coding->charbuf_size = size; \
coding->charbuf = SAFE_ALLOCA (CHARBUF_SIZE * sizeof (int)); \
coding->charbuf_size = CHARBUF_SIZE; \
} while (0)
@ -6968,6 +6947,8 @@ decode_coding (struct coding_system *coding)
int carryover;
int i;
USE_SAFE_ALLOCA;
if (BUFFERP (coding->src_object)
&& coding->src_pos > 0
&& coding->src_pos < GPT
@ -7090,6 +7071,8 @@ decode_coding (struct coding_system *coding)
bset_undo_list (current_buffer, undo_list);
record_insert (coding->dst_pos, coding->produced_char);
}
SAFE_FREE ();
}
@ -7373,6 +7356,8 @@ encode_coding (struct coding_system *coding)
int max_lookup;
struct ccl_spec cclspec;
USE_SAFE_ALLOCA;
attrs = CODING_ID_ATTRS (coding->id);
if (coding->encoder == encode_coding_raw_text)
translation_table = Qnil, max_lookup = 0;
@ -7407,6 +7392,8 @@ encode_coding (struct coding_system *coding)
if (BUFFERP (coding->dst_object) && coding->produced_char > 0)
insert_from_gap (coding->produced_char, coding->produced);
SAFE_FREE ();
}
@ -7695,14 +7682,8 @@ decode_coding_object (struct coding_system *coding,
set_buffer_internal (XBUFFER (coding->dst_object));
if (dst_bytes < coding->produced)
{
eassert (coding->produced > 0);
destination = xrealloc (destination, coding->produced);
if (! destination)
{
record_conversion_result (coding,
CODING_RESULT_INSUFFICIENT_MEM);
unbind_to (count, Qnil);
return;
}
if (BEGV < GPT && GPT < BEGV + coding->produced_char)
move_gap_both (BEGV, BEGV_BYTE);
memcpy (destination, BEGV_ADDR, coding->produced);
@ -10408,10 +10389,8 @@ syms_of_coding (void)
intern_c_string ("coding-category-undecided"));
DEFSYM (Qinsufficient_source, "insufficient-source");
DEFSYM (Qinconsistent_eol, "inconsistent-eol");
DEFSYM (Qinvalid_source, "invalid-source");
DEFSYM (Qinterrupted, "interrupted");
DEFSYM (Qinsufficient_memory, "insufficient-memory");
DEFSYM (Qcoding_system_define_form, "coding-system-define-form");
defsubr (&Scoding_system_p);