Merge branch 'db/length-as-hash' into svn-fe
* db/length-as-hash: vcs-svn: use strchr to find RFC822 delimiter vcs-svn: implement perfect hash for top-level keys vcs-svn: implement perfect hash for node-prop keys Conflicts: vcs-svn/svndump.c
This commit is contained in:
Jonathan Nieder
commit
41b9dd9d4f
@ -14,6 +14,12 @@
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#include "string_pool.h"
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#include "strbuf.h"
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/*
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* Compare start of string to literal of equal length;
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* must be guarded by length test.
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*/
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#define constcmp(s, ref) memcmp(s, ref, sizeof(ref) - 1)
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#define NODEACT_REPLACE 4
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#define NODEACT_DELETE 3
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#define NODEACT_ADD 2
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@ -46,15 +52,6 @@ static struct {
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struct strbuf uuid, url;
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} dump_ctx;
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static struct {
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uint32_t svn_log, svn_author, svn_date, svn_executable, svn_special, uuid,
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revision_number, node_path, node_kind, node_action,
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node_copyfrom_path, node_copyfrom_rev, text_content_length,
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prop_content_length, content_length, svn_fs_dump_format_version,
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/* version 3 format */
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text_delta, prop_delta;
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} keys;
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static void reset_node_ctx(char *fname)
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{
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node_ctx.type = 0;
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@ -85,47 +82,45 @@ static void reset_dump_ctx(const char *url)
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strbuf_reset(&dump_ctx.uuid);
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}
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static void init_keys(void)
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{
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keys.svn_log = pool_intern("svn:log");
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keys.svn_author = pool_intern("svn:author");
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keys.svn_date = pool_intern("svn:date");
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keys.svn_executable = pool_intern("svn:executable");
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keys.svn_special = pool_intern("svn:special");
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keys.uuid = pool_intern("UUID");
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keys.revision_number = pool_intern("Revision-number");
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keys.node_path = pool_intern("Node-path");
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keys.node_kind = pool_intern("Node-kind");
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keys.node_action = pool_intern("Node-action");
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keys.node_copyfrom_path = pool_intern("Node-copyfrom-path");
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keys.node_copyfrom_rev = pool_intern("Node-copyfrom-rev");
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keys.text_content_length = pool_intern("Text-content-length");
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keys.prop_content_length = pool_intern("Prop-content-length");
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keys.content_length = pool_intern("Content-length");
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keys.svn_fs_dump_format_version = pool_intern("SVN-fs-dump-format-version");
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/* version 3 format (Subversion 1.1.0) */
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keys.text_delta = pool_intern("Text-delta");
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keys.prop_delta = pool_intern("Prop-delta");
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}
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static void handle_property(uint32_t key, const char *val, uint32_t len,
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static void handle_property(const struct strbuf *key_buf,
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const char *val, uint32_t len,
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uint32_t *type_set)
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{
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if (key == keys.svn_log) {
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const char *key = key_buf->buf;
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size_t keylen = key_buf->len;
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switch (keylen + 1) {
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case sizeof("svn:log"):
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if (constcmp(key, "svn:log"))
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break;
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if (!val)
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die("invalid dump: unsets svn:log");
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strbuf_reset(&rev_ctx.log);
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strbuf_add(&rev_ctx.log, val, len);
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} else if (key == keys.svn_author) {
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break;
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case sizeof("svn:author"):
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if (constcmp(key, "svn:author"))
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break;
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strbuf_reset(&rev_ctx.author);
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if (val)
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strbuf_add(&rev_ctx.author, val, len);
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} else if (key == keys.svn_date) {
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break;
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case sizeof("svn:date"):
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if (constcmp(key, "svn:date"))
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break;
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if (!val)
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die("invalid dump: unsets svn:date");
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if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
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warning("invalid timestamp: %s", val);
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} else if (key == keys.svn_executable || key == keys.svn_special) {
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break;
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case sizeof("svn:executable"):
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case sizeof("svn:special"):
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if (keylen == strlen("svn:executable") &&
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constcmp(key, "svn:executable"))
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break;
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if (keylen == strlen("svn:special") &&
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constcmp(key, "svn:special"))
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break;
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if (*type_set) {
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if (!val)
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return;
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@ -136,7 +131,7 @@ static void handle_property(uint32_t key, const char *val, uint32_t len,
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return;
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}
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*type_set = 1;
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node_ctx.type = key == keys.svn_executable ?
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node_ctx.type = keylen == strlen("svn:executable") ?
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REPO_MODE_EXE :
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REPO_MODE_LNK;
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}
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@ -151,7 +146,7 @@ static void die_short_read(void)
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static void read_props(void)
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{
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uint32_t key = ~0;
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static struct strbuf key = STRBUF_INIT;
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const char *t;
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/*
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* NEEDSWORK: to support simple mode changes like
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@ -188,16 +183,19 @@ static void read_props(void)
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switch (type) {
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case 'K':
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key = pool_intern(val);
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continue;
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case 'D':
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key = pool_intern(val);
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strbuf_reset(&key);
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if (val)
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strbuf_add(&key, val, len);
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if (type == 'K')
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continue;
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assert(type == 'D');
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val = NULL;
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len = 0;
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/* fall through */
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case 'V':
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handle_property(key, val, len, &type_set);
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key = ~0;
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handle_property(&key, val, len, &type_set);
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strbuf_reset(&key);
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continue;
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default:
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die("invalid property line: %s\n", t);
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@ -290,45 +288,65 @@ void svndump_read(const char *url)
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char *t;
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uint32_t active_ctx = DUMP_CTX;
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uint32_t len;
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uint32_t key;
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reset_dump_ctx(url);
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while ((t = buffer_read_line(&input))) {
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val = strstr(t, ": ");
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val = strchr(t, ':');
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if (!val)
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continue;
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*val++ = '\0';
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*val++ = '\0';
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key = pool_intern(t);
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val++;
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if (*val != ' ')
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continue;
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val++;
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if (key == keys.svn_fs_dump_format_version) {
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/* strlen(key) + 1 */
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switch (val - t - 1) {
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case sizeof("SVN-fs-dump-format-version"):
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if (constcmp(t, "SVN-fs-dump-format-version"))
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continue;
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dump_ctx.version = atoi(val);
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if (dump_ctx.version > 3)
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die("expected svn dump format version <= 3, found %"PRIu32,
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dump_ctx.version);
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} else if (key == keys.uuid) {
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break;
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case sizeof("UUID"):
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if (constcmp(t, "UUID"))
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continue;
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strbuf_reset(&dump_ctx.uuid);
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strbuf_addstr(&dump_ctx.uuid, val);
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} else if (key == keys.revision_number) {
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break;
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case sizeof("Revision-number"):
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if (constcmp(t, "Revision-number"))
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continue;
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if (active_ctx == NODE_CTX)
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handle_node();
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if (active_ctx != DUMP_CTX)
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handle_revision();
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active_ctx = REV_CTX;
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reset_rev_ctx(atoi(val));
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} else if (key == keys.node_path) {
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if (active_ctx == NODE_CTX)
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handle_node();
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active_ctx = NODE_CTX;
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reset_node_ctx(val);
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} else if (key == keys.node_kind) {
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break;
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case sizeof("Node-path"):
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if (prefixcmp(t, "Node-"))
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continue;
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if (!constcmp(t + strlen("Node-"), "path")) {
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if (active_ctx == NODE_CTX)
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handle_node();
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active_ctx = NODE_CTX;
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reset_node_ctx(val);
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break;
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}
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if (constcmp(t + strlen("Node-"), "kind"))
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continue;
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if (!strcmp(val, "dir"))
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node_ctx.type = REPO_MODE_DIR;
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else if (!strcmp(val, "file"))
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node_ctx.type = REPO_MODE_BLB;
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else
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fprintf(stderr, "Unknown node-kind: %s\n", val);
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} else if (key == keys.node_action) {
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break;
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case sizeof("Node-action"):
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if (constcmp(t, "Node-action"))
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continue;
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if (!strcmp(val, "delete")) {
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node_ctx.action = NODEACT_DELETE;
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} else if (!strcmp(val, "add")) {
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@ -341,19 +359,38 @@ void svndump_read(const char *url)
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fprintf(stderr, "Unknown node-action: %s\n", val);
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node_ctx.action = NODEACT_UNKNOWN;
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}
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} else if (key == keys.node_copyfrom_path) {
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break;
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case sizeof("Node-copyfrom-path"):
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if (constcmp(t, "Node-copyfrom-path"))
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continue;
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pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
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} else if (key == keys.node_copyfrom_rev) {
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break;
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case sizeof("Node-copyfrom-rev"):
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if (constcmp(t, "Node-copyfrom-rev"))
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continue;
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node_ctx.srcRev = atoi(val);
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} else if (key == keys.text_content_length) {
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node_ctx.textLength = atoi(val);
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} else if (key == keys.prop_content_length) {
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break;
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case sizeof("Text-content-length"):
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if (!constcmp(t, "Text-content-length")) {
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node_ctx.textLength = atoi(val);
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break;
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}
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if (constcmp(t, "Prop-content-length"))
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continue;
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node_ctx.propLength = atoi(val);
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} else if (key == keys.text_delta) {
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node_ctx.text_delta = !strcmp(val, "true");
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} else if (key == keys.prop_delta) {
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break;
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case sizeof("Text-delta"):
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if (!constcmp(t, "Text-delta")) {
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node_ctx.text_delta = !strcmp(val, "true");
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break;
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}
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if (constcmp(t, "Prop-delta"))
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continue;
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node_ctx.prop_delta = !strcmp(val, "true");
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} else if (key == keys.content_length) {
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break;
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case sizeof("Content-length"):
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if (constcmp(t, "Content-length"))
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continue;
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len = atoi(val);
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t = buffer_read_line(&input);
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if (!t)
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@ -392,7 +429,6 @@ int svndump_init(const char *filename)
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reset_dump_ctx(NULL);
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reset_rev_ctx(0);
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reset_node_ctx(NULL);
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init_keys();
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return 0;
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}
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