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blob: optimize spn and cspn

cute-signatures
Timo Teräs 2012-02-08 17:01:14 +02:00
parent 3320fba50d
commit fe9b4a3888
4 changed files with 112 additions and 12 deletions
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7
src/apk_blob.h
View File

@ -18,6 +18,9 @@
#include "apk_defines.h"
typedef const unsigned char *apk_spn_match;
typedef unsigned char apk_spn_match_def[256 / 8];
struct apk_blob {
long len;
char *ptr;
@ -83,8 +86,8 @@ static inline apk_blob_t apk_blob_trim(apk_blob_t blob)
}
char *apk_blob_cstr(apk_blob_t str);
int apk_blob_spn(apk_blob_t blob, const char *accept, apk_blob_t *l, apk_blob_t *r);
int apk_blob_cspn(apk_blob_t blob, const char *reject, apk_blob_t *l, apk_blob_t *r);
int apk_blob_spn(apk_blob_t blob, const apk_spn_match accept, apk_blob_t *l, apk_blob_t *r);
int apk_blob_cspn(apk_blob_t blob, const apk_spn_match reject, apk_blob_t *l, apk_blob_t *r);
int apk_blob_split(apk_blob_t blob, apk_blob_t split, apk_blob_t *l, apk_blob_t *r);
int apk_blob_rsplit(apk_blob_t blob, char split, apk_blob_t *l, apk_blob_t *r);
apk_blob_t apk_blob_pushed(apk_blob_t buffer, apk_blob_t left);

91
src/blob.c
View File

@ -38,12 +38,94 @@ char *apk_blob_cstr(apk_blob_t blob)
return cstr;
}
int apk_blob_spn(apk_blob_t blob, const char *accept, apk_blob_t *l, apk_blob_t *r)
#if defined(__i386__)
static unsigned long inline memspn(
const unsigned char *ptr,
unsigned long len,
const unsigned char *array)
{
unsigned long p = len;
__asm__("cld ; xorl %%eax, %%eax\n"
"1:\n"
"lodsb\n"
"btl %%eax, %2\n"
"jnc 2f\n"
"decl %1\n"
"jnz 1b\n"
"2:\n"
: "+&S" (ptr), "+&r" (p)
: "m" (*array)
: "cc", "%eax");
return p;
}
static unsigned long inline memcspn(
const unsigned char *ptr,
unsigned long len,
const unsigned char *array)
{
unsigned long p = len;
__asm__("cld ; xorl %%eax, %%eax\n"
"1:\n"
"lodsb\n"
"btl %%eax, %2\n"
"jc 2f\n"
"decl %1\n"
"jnz 1b\n"
"2:\n"
: "+&S" (ptr), "+&r" (p)
: "m" (*array)
: "cc", "%eax");
return p;
}
int apk_blob_spn(apk_blob_t blob, const apk_spn_match accept, apk_blob_t *l, apk_blob_t *r)
{
unsigned int i;
if (blob.len == 0)
return 0;
i = blob.len - memspn((unsigned char*) blob.ptr, blob.len, accept);
if (i == blob.len)
return 0;
if (l != NULL)
*l = APK_BLOB_PTR_LEN(blob.ptr, i);
if (r != NULL)
*r = APK_BLOB_PTR_LEN(blob.ptr+i, blob.len-i);
return 1;
}
int apk_blob_cspn(apk_blob_t blob, const apk_spn_match reject, apk_blob_t *l, apk_blob_t *r)
{
unsigned int i;
if (blob.len == 0)
return 0;
i = blob.len - memcspn((unsigned char*) blob.ptr, blob.len, reject);
if (i == blob.len)
return 0;
if (l != NULL)
*l = APK_BLOB_PTR_LEN(blob.ptr, i);
if (r != NULL)
*r = APK_BLOB_PTR_LEN(blob.ptr+i, blob.len-i);
return 1;
}
#else
static int inline test_bit(const unsigned char *array, unsigned bit)
{
return array[bit >> 3] & (1 << (bit & 7));
}
int apk_blob_spn(apk_blob_t blob, const apk_spn_match accept, apk_blob_t *l, apk_blob_t *r)
{
int i;
for (i = 0; i < blob.len; i++) {
if (strchr(accept, blob.ptr[i]) == NULL) {
if (!test_bit(accept, blob.ptr[i])) {
if (l != NULL)
*l = APK_BLOB_PTR_LEN(blob.ptr, i);
if (r != NULL)
@ -54,12 +136,12 @@ int apk_blob_spn(apk_blob_t blob, const char *accept, apk_blob_t *l, apk_blob_t
return 0;
}
int apk_blob_cspn(apk_blob_t blob, const char *reject, apk_blob_t *l, apk_blob_t *r)
int apk_blob_cspn(apk_blob_t blob, const apk_spn_match reject, apk_blob_t *l, apk_blob_t *r)
{
int i;
for (i = 0; i < blob.len; i++) {
if (strchr(reject, blob.ptr[i]) != NULL) {
if (test_bit(reject, blob.ptr[i])) {
if (l != NULL)
*l = APK_BLOB_PTR_LEN(blob.ptr, i);
if (r != NULL)
@ -69,6 +151,7 @@ int apk_blob_cspn(apk_blob_t blob, const char *reject, apk_blob_t *l, apk_blob_t
}
return 0;
}
#endif
int apk_blob_rsplit(apk_blob_t blob, char split, apk_blob_t *l, apk_blob_t *r)
{

9
src/database.c
View File

@ -33,6 +33,11 @@
#include "apk_archive.h"
#include "apk_print.h"
static const apk_spn_match_def apk_spn_repo_separators = {
[4] = (1<<0) /* */,
[7] = (1<<2) /*:*/,
};
enum {
APK_DISALLOW_RMDIR = 0,
APK_ALLOW_RMDIR = 1
@ -1770,8 +1775,8 @@ int apk_db_add_repository(apk_database_t _db, apk_blob_t _repository)
if (brepo.ptr[0] == '@') {
apk_blob_pull_char(&brepo, '@');
apk_blob_cspn(brepo, ": ", &btag, &brepo);
apk_blob_spn(brepo, ": ", NULL, &brepo);
apk_blob_cspn(brepo, apk_spn_repo_separators, &btag, &brepo);
apk_blob_spn(brepo, apk_spn_repo_separators, NULL, &brepo);
tag_id = apk_db_get_tag_id(db, btag);
}

17
src/package.c
View File

@ -29,6 +29,15 @@
#include "apk_database.h"
#include "apk_print.h"
static const apk_spn_match_def apk_spn_dependency_comparer = {
[7] = (1<<4) /*<*/ | (1<<5) /*=*/ | (1<<6) /*<*/,
};
static const apk_spn_match_def apk_spn_dependency_separator = {
[1] = (1<<2) /*\n*/,
[4] = (1<<0) /* */,
};
void apk_pkg_format_plain(struct apk_package *pkg, apk_blob_t to)
{
/* pkgname-1.0.apk */
@ -200,13 +209,13 @@ void apk_blob_pull_dep(apk_blob_t *b, struct apk_database *db, struct apk_depend
goto fail;
/* grap one token */
if (!apk_blob_cspn(*b, " \n", &bdep, NULL))
if (!apk_blob_cspn(*b, apk_spn_dependency_separator, &bdep, NULL))
bdep = *b;
b->ptr += bdep.len;
b->len -= bdep.len;
/* skip also all separator chars */
if (!apk_blob_spn(*b, " \n", NULL, b)) {
if (!apk_blob_spn(*b, apk_spn_dependency_separator, NULL, b)) {
b->ptr += b->len;
b->len = 0;
}
@ -218,12 +227,12 @@ void apk_blob_pull_dep(apk_blob_t *b, struct apk_database *db, struct apk_depend
optional = 1;
}
if (apk_blob_cspn(bdep, "<>=", &bname, &bop)) {
if (apk_blob_cspn(bdep, apk_spn_dependency_comparer, &bname, &bop)) {
int i;
if (mask == 0)
goto fail;
if (!apk_blob_spn(bop, "<>=", &bop, &bver))
if (!apk_blob_spn(bop, apk_spn_dependency_comparer, &bop, &bver))
goto fail;
mask = 0;
for (i = 0; i < bop.len; i++) {