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Add streams based incremental hashing updaters

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This commit is contained in:
Sara Golemon 2005-11-19 21:09:40 +00:00
parent ef37868378
commit 7cbd9686b1
1 changed files with 72 additions and 0 deletions
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72
ext/hash/hash.c
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@ -220,6 +220,76 @@ PHP_FUNCTION(hash_update)
}
/* }}} */
/* {{{ proto int hash_update_stream(resource context, resource handle[, integer length])
Pump data into the hashing algorithm from an open stream */
PHP_FUNCTION(hash_update_stream)
{
zval *zhash, *zstream;
php_hash_data *hash;
php_stream *stream = NULL;
long length = -1, didread = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rr|l", &zhash, &zstream, &length) == FAILURE) {
return;
}
ZEND_FETCH_RESOURCE(hash, php_hash_data*, &zhash, -1, PHP_HASH_RESNAME, php_hash_le_hash);
php_stream_from_zval(stream, &zstream);
while (length) {
char buf[1024];
long n, toread = 1024;
if (length > 0 && toread > length) {
toread = length;
}
if ((n = php_stream_read(stream, buf, toread)) <= 0) {
/* Nada mas */
RETURN_LONG(didread);
}
hash->ops->hash_update(hash->context, buf, n);
length -= n;
didread += n;
}
RETURN_LONG(didread);
}
/* }}} */
/* {{{ proto bool hash_update_file(resource context, string filename[, resource context])
Pump data into the hashing algorithm from an open stream */
PHP_FUNCTION(hash_update_file)
{
zval *zhash, *zcontext = NULL;
php_hash_data *hash;
php_stream_context *context;
php_stream *stream;
char *filename, buf[1024];
int filename_len, n;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rs|r", &zhash, &filename, &filename_len, &zcontext) == FAILURE) {
return;
}
ZEND_FETCH_RESOURCE(hash, php_hash_data*, &zhash, -1, PHP_HASH_RESNAME, php_hash_le_hash);
context = php_stream_context_from_zval(zcontext, 0);
stream = php_stream_open_wrapper_ex(filename, "rb", REPORT_ERRORS | ENFORCE_SAFE_MODE, NULL, context);
if (!stream) {
/* Stream will report errors opening file */
RETURN_FALSE;
}
while ((n = php_stream_read(stream, buf, sizeof(buf))) > 0) {
hash->ops->hash_update(hash->context, buf, n);
}
php_stream_close(stream);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto string hash_final(resource context[, bool raw_output=false])
Output resulting digest */
PHP_FUNCTION(hash_final)
@ -384,6 +454,8 @@ function_entry hash_functions[] = {
PHP_FE(hash_init, NULL)
PHP_FE(hash_update, NULL)
PHP_FE(hash_update_stream, NULL)
PHP_FE(hash_update_file, NULL)
PHP_FE(hash_final, NULL)
PHP_FE(hash_algos, NULL)