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Diffstat (limited to 'iconvdata/iso646.c')
-rw-r--r--iconvdata/iso646.c332
1 files changed, 136 insertions, 196 deletions
diff --git a/iconvdata/iso646.c b/iconvdata/iso646.c
index 3c40c8f..4b7c2bb 100644
--- a/iconvdata/iso646.c
+++ b/iconvdata/iso646.c
@@ -32,9 +32,23 @@
proofs to be necessary. */
#include <gconv.h>
-#include <stdlib.h>
+#include <stdint.h>
#include <string.h>
+/* Definitions used in the body of the `gconv' function. */
+#define FROM_LOOP from_ascii
+#define TO_LOOP to_ascii
+#define DEFINE_INIT 0
+#define DEFINE_FINI 0
+#define MIN_NEEDED_FROM 1
+#define MIN_NEEDED_TO 4
+#define FROM_DIRECTION dir == from_iso646
+#define PREPARE_LOOP \
+ enum direction dir = ((struct iso646_data *) step->data)->dir; \
+ enum variant var = ((struct iso646_data *) step->data)->var;
+#define EXTRA_LOOP_ARGS , var
+
+
/* Direction of the transformation. */
enum direction
{
@@ -66,22 +80,22 @@ gconv_init (struct gconv_step *step)
enum variant var;
int result;
- if (strcasestr (step->from_name, "ANSI_X3.4-1968") != NULL)
+ if (__strcasestr (step->from_name, "ANSI_X3.4-1968") != NULL)
{
dir = from_iso646;
var = US;
}
- else if (strcasestr (step->from_name, "BS_4730") != NULL)
+ else if (__strcasestr (step->from_name, "BS_4730") != NULL)
{
dir = from_iso646;
var = GB;
}
- else if (strcasestr (step->to_name, "ANSI_X3.4-1968") != NULL)
+ else if (__strcasestr (step->to_name, "ANSI_X3.4-1968") != NULL)
{
dir = to_iso646;
var = US;
}
- else if (strcasestr (step->to_name, "BS_4730") != NULL)
+ else if (__strcasestr (step->to_name, "BS_4730") != NULL)
{
dir = to_iso646;
var = GB;
@@ -104,6 +118,13 @@ gconv_init (struct gconv_step *step)
result = GCONV_OK;
}
+ step->min_needed_from = MIN_NEEDED_FROM;
+ step->max_needed_from = MIN_NEEDED_FROM;
+ step->min_needed_to = MIN_NEEDED_TO;
+ step->max_needed_to = MIN_NEEDED_TO;
+
+ step->stateful = 0;
+
return result;
}
@@ -115,194 +136,113 @@ gconv_end (struct gconv_step *data)
}
-int
-gconv (struct gconv_step *step, struct gconv_step_data *data,
- const char *inbuf, size_t *inbufsize, size_t *written, int do_flush)
-{
- struct gconv_step *next_step = step + 1;
- struct gconv_step_data *next_data = data + 1;
- gconv_fct fct = next_step->fct;
- size_t do_write;
- int result;
-
- /* If the function is called with no input this means we have to reset
- to the initial state. The possibly partly converted input is
- dropped. */
- if (do_flush)
- {
- do_write = 0;
-
- /* Call the steps down the chain if there are any. */
- if (data->is_last)
- result = GCONV_OK;
- else
- {
- struct gconv_step *next_step = step + 1;
- struct gconv_step_data *next_data = data + 1;
-
- result = (*fct) (next_step, next_data, NULL, 0, written, 1);
-
- /* Clear output buffer. */
- data->outbufavail = 0;
- }
- }
- else
- {
- enum direction dir = ((struct iso646_data *) step->data)->dir;
- enum variant var = ((struct iso646_data *) step->data)->var;
-
- do_write = 0;
-
- do
- {
- result = GCONV_OK;
-
- if (dir == from_iso646)
- {
- size_t inchars = *inbufsize;
- size_t outwchars = data->outbufavail;
- char *outbuf = data->outbuf;
- size_t cnt = 0;
-
- while (cnt < inchars
- && (outwchars + sizeof (wchar_t) <= data->outbufsize))
- {
- switch ((unsigned char) inbuf[cnt])
- {
- case '\x23':
- if (var == GB)
- *((wchar_t *) (outbuf + outwchars)) = 0xa3;
- else
- *((wchar_t *) (outbuf + outwchars)) = 0x23;
- break;
- case '\x75':
- if (var == GB)
- *((wchar_t *) (outbuf + outwchars)) = 0x203e;
- else
- *((wchar_t *) (outbuf + outwchars)) = 0x75;
- break;
- default:
- *((wchar_t *) (outbuf + outwchars)) =
- (unsigned char) inbuf[cnt];
- case '\x80' ... '\xff':
- /* Illegal character. */
- result = GCONV_ILLEGAL_INPUT;
- goto out_from;
- }
- ++do_write;
- outwchars += sizeof (wchar_t);
- ++cnt;
- }
- out_from:
- *inbufsize -= cnt;
- inbuf += cnt;
- data->outbufavail = outwchars;
- }
- else
- {
- size_t inwchars = *inbufsize;
- size_t outchars = data->outbufavail;
- unsigned char *outbuf = data->outbuf;
- size_t cnt = 0;
-
- while (inwchars >= cnt + sizeof (wchar_t)
- && outchars < data->outbufsize)
- {
- switch (*((wchar_t *) (inbuf + cnt)))
- {
- case 0x23:
- if (var == GB)
- goto out_to;
- outbuf[outchars] = 0x23;
- break;
- case 0x75:
- if (var == GB)
- goto out_to;
- outbuf[outchars] = 0x75;
- break;
- case 0xa3:
- if (var != GB)
- goto out_to;
- outbuf[outchars] = 0x23;
- break;
- case 0x203e:
- if (var != GB)
- goto out_to;
- outbuf[outchars] = 0x75;
- break;
- default:
- if (*((wchar_t *) (inbuf + cnt)) > 0x7f)
- goto out_to;
- outbuf[outchars] =
- (unsigned char) *((wchar_t *) (inbuf + cnt));
- break;
- }
-
- ++do_write;
- ++outchars;
- cnt += sizeof (wchar_t);
- }
- out_to:
- *inbufsize -= cnt;
- inbuf += cnt;
- data->outbufavail = outchars;
-
- if (outchars < data->outbufsize)
- {
- /* If there is still room in the output buffer something
- is wrong with the input. */
- if (inwchars >= cnt + sizeof (wchar_t))
- {
- /* An error occurred. */
- result = GCONV_ILLEGAL_INPUT;
- break;
- }
- if (inwchars != cnt)
- {
- /* There are some unprocessed bytes at the end of the
- input buffer. */
- result = GCONV_INCOMPLETE_INPUT;
- break;
- }
- }
- }
-
- if (result != GCONV_OK)
- break;
-
- if (data->is_last)
- {
- /* This is the last step. */
- result = (*inbufsize > (dir == from_iso646
- ? 0 : sizeof (wchar_t) - 1)
- ? GCONV_FULL_OUTPUT : GCONV_EMPTY_INPUT);
- break;
- }
-
- /* Status so far. */
- result = GCONV_EMPTY_INPUT;
-
- if (data->outbufavail > 0)
- {
- /* Call the functions below in the chain. */
- size_t newavail = data->outbufavail;
-
- result = (*fct) (next_step, next_data, data->outbuf, &newavail,
- written, 0);
-
- /* Correct the output buffer. */
- if (newavail != data->outbufavail && newavail > 0)
- memmove (data->outbuf,
- &data->outbuf[data->outbufavail - newavail],
- newavail);
- data->outbufavail = newavail;
- }
- }
- while (*inbufsize > 0 && result == GCONV_EMPTY_INPUT);
- }
-
- if (written != NULL && data->is_last)
- *written += do_write;
-
- return result;
-}
+/* First define the conversion function from ASCII to UCS4. */
+#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
+#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
+#define LOOPFCT FROM_LOOP
+#define BODY \
+ { \
+ uint32_t ch; \
+ int failure = GCONV_OK; \
+ \
+ switch (*inptr) \
+ { \
+ case '\x23': \
+ if (var == GB) \
+ ch = 0xa3; \
+ else \
+ ch = 0x23; \
+ break; \
+ case '\x7e': \
+ if (var == GB) \
+ ch = 0x203e; \
+ else \
+ ch = 0x7e; \
+ break; \
+ default: \
+ ch = *inptr; \
+ break; \
+ case '\x80' ... '\xff': \
+ /* Illegal character. */ \
+ failure = GCONV_ILLEGAL_INPUT; \
+ ch = '\0'; /* OK, gcc, here I initialize the variable. */ \
+ break; \
+ } \
+ \
+ /* Hopefully gcc can recognize that the following `if' is only true \
+ when we reach the default case in the `switch' statement. */ \
+ if (failure == GCONV_ILLEGAL_INPUT) \
+ { \
+ /* Exit the loop with an error. */ \
+ result = failure; \
+ break; \
+ } \
+ *((uint32_t *) outptr)++ = ch; \
+ ++inptr; \
+ }
+#define EXTRA_LOOP_DECLS , enum variant var
+#include <iconv/loop.c>
+
+
+/* Next, define the other direction. */
+#define MIN_NEEDED_INPUT MIN_NEEDED_TO
+#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
+#define LOOPFCT TO_LOOP
+#define BODY \
+ { \
+ unsigned char ch; \
+ int failure = GCONV_OK; \
+ \
+ do \
+ { \
+ switch (*((uint32_t *) inptr)) \
+ { \
+ case 0x23: \
+ if (var == GB) \
+ break; \
+ ch = 0x23; \
+ continue; \
+ case 0x7e: \
+ if (var == GB) \
+ break; \
+ ch = 0x7e; \
+ continue; \
+ case 0xa3: \
+ if (var != GB) \
+ break; \
+ ch = 0x23; \
+ continue; \
+ case 0x203e: \
+ if (var != GB) \
+ break; \
+ ch = 0x7e; \
+ continue; \
+ default: \
+ if (*((uint32_t *) inptr) > 0x7f) \
+ break; \
+ ch = (unsigned char) *((uint32_t *) inptr); \
+ continue; \
+ } \
+ /* When we come to this place we saw an illegal character. */ \
+ failure = GCONV_ILLEGAL_INPUT; \
+ ch = '\0'; /* OK, gcc, here I initialize the variable. */ \
+ } \
+ while (0); \
+ \
+ /* Hopefully gcc can recognize that the following `if' is only true \
+ when we fall through the `switch' statement. */ \
+ if (failure == GCONV_ILLEGAL_INPUT) \
+ { \
+ /* Exit the loop with an error. */ \
+ result = failure; \
+ break; \
+ } \
+ *outptr++ = ch; \
+ inptr += 4; \
+ }
+#define EXTRA_LOOP_DECLS , enum variant var
+#include <iconv/loop.c>
+
+
+/* Now define the toplevel functions. */
+#include <iconv/skeleton.c>
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