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code made faster

This commit is contained in:
Lev Walkin 2004-10-02 12:29:44 +00:00
parent e18ca715ef
commit bbd66b0428
1 changed files with 24 additions and 42 deletions
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66
skeletons/UTF8String.c
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@ -63,52 +63,34 @@ UTF8String_length(const UTF8String_t *st, const char *opt_type_name,
asn_app_consume_bytes_f *app_errlog, void *app_key) {
if(st && st->buf) {
size_t length = 0;
size_t length;
uint8_t *buf = st->buf;
uint8_t *end = buf + st->size;
int want; /* Number of bytes wanted */
for(want = 0; buf < end; buf++) {
uint8_t ch = *buf;
int w = UTF8String_ht[0][ch >> 4];
if(want) { /* Continuation expected */
if(w) {
_ASN_ERRLOG(app_errlog, app_key,
"%s: UTF-8 expectation "
"failed at byte %d (%s:%d)",
opt_type_name,
(buf - st->buf) + 1,
__FILE__, __LINE__);
return -1;
}
want--;
} else {
switch(w) {
case -1: /* Long UTF-8 */
w = UTF8String_ht[1][ch & 0x0F];
if(w != -1)
break;
/* Fall through */
case 0: /* But we should want something! */
_ASN_ERRLOG(app_errlog, app_key,
"%s: UTF-8 expectation"
"failed at byte %d (%s:%d)",
opt_type_name,
(buf - st->buf) + 1,
__FILE__, __LINE__);
return -1;
}
want = w - 1; /* Expect this much */
for(length = 0; buf < end; length++) {
int ch = *buf;
int want = UTF8String_ht[0][ch >> 4];
switch(want) {
case -1: /* Second half of the table, long sequence */
want = UTF8String_ht[1][ch & 0x0F];
if(want != -1)
break; /* Fine value */
case 0: /* 10xxxxxx should not appear here */
_ASN_ERRLOG(app_errlog, app_key,
"%s: UTF-8 expectation failed "
"at byte %d (%s:%d)",
opt_type_name,
(buf - st->buf) + 1,
__FILE__, __LINE__);
return -1;
}
if(!want) length++;
}
/* If still want something, then something is wrong */
if(want) {
_ASN_ERRLOG(app_errlog, app_key,
"%s: truncated UTF-8 sequence (%s:%d)",
opt_type_name, __FILE__, __LINE__);
return -1;
if(buf + want > end) {
_ASN_ERRLOG(app_errlog, app_key,
"%s: truncated UTF-8 sequence (%s:%d)",
opt_type_name, __FILE__, __LINE__);
return -1;
}
buf += want;
}
return length;