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Code Issues Releases Wiki Activity

optimize dns_rdatatype_fromtext()

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Michael Graff
2000-04-25 19:09:07 +00:00
parent 32eeec8559
commit 94a537e6ab
2 changed files with 115 additions and 63 deletions
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70
lib/dns/rdata.c
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@@ -15,10 +15,11 @@
* SOFTWARE.
*/
/* $Id: rdata.c,v 1.77 2000/04/14 20:13:45 explorer Exp $ */
/* $Id: rdata.c,v 1.78 2000/04/25 19:09:07 explorer Exp $ */
#include <config.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
@@ -119,22 +120,6 @@ static const char octdigits[] = "01234567";
#define META 0x0001
#define RESERVED 0x0002
#define METATYPES \
{ 0, "RESERVED0", META }, \
{ 31, "EID", RESERVED }, \
{ 32, "NIMLOC", RESERVED }, \
{ 34, "ATMA", RESERVED }, \
{ 100, "UINFO", RESERVED }, \
{ 101, "UID", RESERVED }, \
{ 102, "GID", RESERVED }, \
{ 249, "TKEY", META }, \
{ 250, "TSIG", META }, \
{ 251, "IXFR", META }, \
{ 252, "AXFR", META }, \
{ 253, "MAILB", META }, \
{ 254, "MAILA", META }, \
{ 255, "ANY", META },
/*
* Empty classes are those without any types of their own.
*/
@@ -194,16 +179,19 @@ static const char octdigits[] = "01234567";
{ 255, "ALL", 0 }, \
{ 0, NULL, 0}
static struct tbl {
struct tbl {
unsigned int value;
char *name;
int flags;
} types[] = { TYPENAMES METATYPES {0, NULL, 0} },
classes[] = { METACLASSES CLASSNAMES EMPTYCLASSES { 0, NULL, 0} },
rcodes[] = { RCODENAMES },
certs[] = { CERTNAMES },
secalgs[] = { SECALGNAMES },
secprotos[] = { SECPROTONAMES };
};
static struct tbl classes[] = {
METACLASSES CLASSNAMES EMPTYCLASSES { 0, NULL, 0}
};
static struct tbl rcodes[] = { RCODENAMES };
static struct tbl certs[] = { CERTNAMES };
static struct tbl secalgs[] = { SECALGNAMES };
static struct tbl secprotos[] = { SECPROTONAMES };
static struct keyflag {
char *name;
@@ -738,21 +726,29 @@ dns_rdataclass_totext(dns_rdataclass_t rdclass, isc_buffer_t *target) {
/* XXXRTH Should we use a hash table here? */
isc_result_t
dns_rdatatype_fromtext(dns_rdatatype_t *typep, isc_textregion_t *source) {
int i = 0;
dns_rdatatype_fromtext(dns_rdatatype_t *typep, isc_textregion_t *source)
{
unsigned int hash;
unsigned int n;
unsigned char a, b;
n = source->length;
if (n == 0)
return (DNS_R_UNKNOWN);
a = tolower(source->base[0]);
b = tolower(source->base[n - 1]);
hash = ((a + n) * b) % 256;
/*
* This switch block is inlined via #define, and will use "return"
* to return a result to the caller if it is a valid (known)
* rdatatype name.
*/
RDATATYPE_FROMTEXT_SW(hash, source->base, typep);
while (types[i].name != NULL) {
n = strlen(types[i].name);
if (n == source->length &&
strncasecmp(source->base, types[i].name, n) == 0) {
*typep = types[i].value;
if ((types[i].flags & RESERVED) != 0)
return (ISC_R_NOTIMPLEMENTED);
return (ISC_R_SUCCESS);
}
i++;
}
return (DNS_R_UNKNOWN);
}