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-rw-r--r--vcs-svn/LICENSE32
-rw-r--r--vcs-svn/fast_export.c311
-rw-r--r--vcs-svn/fast_export.h27
-rw-r--r--vcs-svn/line_buffer.c126
-rw-r--r--vcs-svn/line_buffer.h30
-rw-r--r--vcs-svn/line_buffer.txt77
-rw-r--r--vcs-svn/repo_tree.c48
-rw-r--r--vcs-svn/repo_tree.h23
-rw-r--r--vcs-svn/sliding_window.c79
-rw-r--r--vcs-svn/sliding_window.h18
-rw-r--r--vcs-svn/svndiff.c309
-rw-r--r--vcs-svn/svndiff.h10
-rw-r--r--vcs-svn/svndump.c509
-rw-r--r--vcs-svn/svndump.h9
14 files changed, 1608 insertions, 0 deletions
diff --git a/vcs-svn/LICENSE b/vcs-svn/LICENSE
new file mode 100644
index 0000000000..eb91858b82
--- /dev/null
+++ b/vcs-svn/LICENSE
@@ -0,0 +1,32 @@
+Copyright (C) 2010 David Barr <david.barr@cordelta.com>.
+All rights reserved.
+
+Copyright (C) 2010 Jonathan Nieder <jrnieder@gmail.com>.
+
+Copyright (C) 2005 Stefan Hegny, hydrografix Consulting GmbH,
+Frankfurt/Main, Germany
+and others, see http://svn2cc.sarovar.org
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+ notice(s), this list of conditions and the following disclaimer
+ unmodified other than the allowable addition of one or more
+ copyright notices.
+2. Redistributions in binary form must reproduce the above copyright
+ notice(s), this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vcs-svn/fast_export.c b/vcs-svn/fast_export.c
new file mode 100644
index 0000000000..1f04697866
--- /dev/null
+++ b/vcs-svn/fast_export.c
@@ -0,0 +1,311 @@
+/*
+ * Licensed under a two-clause BSD-style license.
+ * See LICENSE for details.
+ */
+
+#include "git-compat-util.h"
+#include "strbuf.h"
+#include "quote.h"
+#include "fast_export.h"
+#include "repo_tree.h"
+#include "strbuf.h"
+#include "svndiff.h"
+#include "sliding_window.h"
+#include "line_buffer.h"
+
+#define MAX_GITSVN_LINE_LEN 4096
+
+static uint32_t first_commit_done;
+static struct line_buffer postimage = LINE_BUFFER_INIT;
+static struct line_buffer report_buffer = LINE_BUFFER_INIT;
+
+/* NEEDSWORK: move to fast_export_init() */
+static int init_postimage(void)
+{
+ static int postimage_initialized;
+ if (postimage_initialized)
+ return 0;
+ postimage_initialized = 1;
+ return buffer_tmpfile_init(&postimage);
+}
+
+void fast_export_init(int fd)
+{
+ first_commit_done = 0;
+ if (buffer_fdinit(&report_buffer, fd))
+ die_errno("cannot read from file descriptor %d", fd);
+}
+
+void fast_export_deinit(void)
+{
+ if (buffer_deinit(&report_buffer))
+ die_errno("error closing fast-import feedback stream");
+}
+
+void fast_export_delete(const char *path)
+{
+ putchar('D');
+ putchar(' ');
+ quote_c_style(path, NULL, stdout, 0);
+ putchar('\n');
+}
+
+static void fast_export_truncate(const char *path, uint32_t mode)
+{
+ fast_export_modify(path, mode, "inline");
+ printf("data 0\n\n");
+}
+
+void fast_export_modify(const char *path, uint32_t mode, const char *dataref)
+{
+ /* Mode must be 100644, 100755, 120000, or 160000. */
+ if (!dataref) {
+ fast_export_truncate(path, mode);
+ return;
+ }
+ printf("M %06"PRIo32" %s ", mode, dataref);
+ quote_c_style(path, NULL, stdout, 0);
+ putchar('\n');
+}
+
+static char gitsvnline[MAX_GITSVN_LINE_LEN];
+void fast_export_begin_commit(uint32_t revision, const char *author,
+ const struct strbuf *log,
+ const char *uuid, const char *url,
+ unsigned long timestamp)
+{
+ static const struct strbuf empty = STRBUF_INIT;
+ if (!log)
+ log = &empty;
+ if (*uuid && *url) {
+ snprintf(gitsvnline, MAX_GITSVN_LINE_LEN,
+ "\n\ngit-svn-id: %s@%"PRIu32" %s\n",
+ url, revision, uuid);
+ } else {
+ *gitsvnline = '\0';
+ }
+ printf("commit refs/heads/master\n");
+ printf("mark :%"PRIu32"\n", revision);
+ printf("committer %s <%s@%s> %ld +0000\n",
+ *author ? author : "nobody",
+ *author ? author : "nobody",
+ *uuid ? uuid : "local", timestamp);
+ printf("data %"PRIuMAX"\n",
+ (uintmax_t) (log->len + strlen(gitsvnline)));
+ fwrite(log->buf, log->len, 1, stdout);
+ printf("%s\n", gitsvnline);
+ if (!first_commit_done) {
+ if (revision > 1)
+ printf("from :%"PRIu32"\n", revision - 1);
+ first_commit_done = 1;
+ }
+}
+
+void fast_export_end_commit(uint32_t revision)
+{
+ printf("progress Imported commit %"PRIu32".\n\n", revision);
+}
+
+static void ls_from_rev(uint32_t rev, const char *path)
+{
+ /* ls :5 path/to/old/file */
+ printf("ls :%"PRIu32" ", rev);
+ quote_c_style(path, NULL, stdout, 0);
+ putchar('\n');
+ fflush(stdout);
+}
+
+static void ls_from_active_commit(const char *path)
+{
+ /* ls "path/to/file" */
+ printf("ls \"");
+ quote_c_style(path, NULL, stdout, 1);
+ printf("\"\n");
+ fflush(stdout);
+}
+
+static const char *get_response_line(void)
+{
+ const char *line = buffer_read_line(&report_buffer);
+ if (line)
+ return line;
+ if (buffer_ferror(&report_buffer))
+ die_errno("error reading from fast-import");
+ die("unexpected end of fast-import feedback");
+}
+
+static void die_short_read(struct line_buffer *input)
+{
+ if (buffer_ferror(input))
+ die_errno("error reading dump file");
+ die("invalid dump: unexpected end of file");
+}
+
+static int ends_with(const char *s, size_t len, const char *suffix)
+{
+ const size_t suffixlen = strlen(suffix);
+ if (len < suffixlen)
+ return 0;
+ return !memcmp(s + len - suffixlen, suffix, suffixlen);
+}
+
+static int parse_cat_response_line(const char *header, off_t *len)
+{
+ size_t headerlen = strlen(header);
+ uintmax_t n;
+ const char *type;
+ const char *end;
+
+ if (ends_with(header, headerlen, " missing"))
+ return error("cat-blob reports missing blob: %s", header);
+ type = strstr(header, " blob ");
+ if (!type)
+ return error("cat-blob header has wrong object type: %s", header);
+ n = strtoumax(type + strlen(" blob "), (char **) &end, 10);
+ if (end == type + strlen(" blob "))
+ return error("cat-blob header does not contain length: %s", header);
+ if (memchr(type + strlen(" blob "), '-', end - type - strlen(" blob ")))
+ return error("cat-blob header contains negative length: %s", header);
+ if (n == UINTMAX_MAX || n > maximum_signed_value_of_type(off_t))
+ return error("blob too large for current definition of off_t");
+ *len = n;
+ if (*end)
+ return error("cat-blob header contains garbage after length: %s", header);
+ return 0;
+}
+
+static void check_preimage_overflow(off_t a, off_t b)
+{
+ if (signed_add_overflows(a, b))
+ die("blob too large for current definition of off_t");
+}
+
+static long apply_delta(off_t len, struct line_buffer *input,
+ const char *old_data, uint32_t old_mode)
+{
+ long ret;
+ struct sliding_view preimage = SLIDING_VIEW_INIT(&report_buffer, 0);
+ FILE *out;
+
+ if (init_postimage() || !(out = buffer_tmpfile_rewind(&postimage)))
+ die("cannot open temporary file for blob retrieval");
+ if (old_data) {
+ const char *response;
+ printf("cat-blob %s\n", old_data);
+ fflush(stdout);
+ response = get_response_line();
+ if (parse_cat_response_line(response, &preimage.max_off))
+ die("invalid cat-blob response: %s", response);
+ check_preimage_overflow(preimage.max_off, 1);
+ }
+ if (old_mode == REPO_MODE_LNK) {
+ strbuf_addstr(&preimage.buf, "link ");
+ check_preimage_overflow(preimage.max_off, strlen("link "));
+ preimage.max_off += strlen("link ");
+ check_preimage_overflow(preimage.max_off, 1);
+ }
+ if (svndiff0_apply(input, len, &preimage, out))
+ die("cannot apply delta");
+ if (old_data) {
+ /* Read the remainder of preimage and trailing newline. */
+ assert(!signed_add_overflows(preimage.max_off, 1));
+ preimage.max_off++; /* room for newline */
+ if (move_window(&preimage, preimage.max_off - 1, 1))
+ die("cannot seek to end of input");
+ if (preimage.buf.buf[0] != '\n')
+ die("missing newline after cat-blob response");
+ }
+ ret = buffer_tmpfile_prepare_to_read(&postimage);
+ if (ret < 0)
+ die("cannot read temporary file for blob retrieval");
+ strbuf_release(&preimage.buf);
+ return ret;
+}
+
+void fast_export_data(uint32_t mode, off_t len, struct line_buffer *input)
+{
+ assert(len >= 0);
+ if (mode == REPO_MODE_LNK) {
+ /* svn symlink blobs start with "link " */
+ if (len < 5)
+ die("invalid dump: symlink too short for \"link\" prefix");
+ len -= 5;
+ if (buffer_skip_bytes(input, 5) != 5)
+ die_short_read(input);
+ }
+ printf("data %"PRIuMAX"\n", (uintmax_t) len);
+ if (buffer_copy_bytes(input, len) != len)
+ die_short_read(input);
+ fputc('\n', stdout);
+}
+
+static int parse_ls_response(const char *response, uint32_t *mode,
+ struct strbuf *dataref)
+{
+ const char *tab;
+ const char *response_end;
+
+ assert(response);
+ response_end = response + strlen(response);
+
+ if (*response == 'm') { /* Missing. */
+ errno = ENOENT;
+ return -1;
+ }
+
+ /* Mode. */
+ if (response_end - response < (signed) strlen("100644") ||
+ response[strlen("100644")] != ' ')
+ die("invalid ls response: missing mode: %s", response);
+ *mode = 0;
+ for (; *response != ' '; response++) {
+ char ch = *response;
+ if (ch < '0' || ch > '7')
+ die("invalid ls response: mode is not octal: %s", response);
+ *mode *= 8;
+ *mode += ch - '0';
+ }
+
+ /* ' blob ' or ' tree ' */
+ if (response_end - response < (signed) strlen(" blob ") ||
+ (response[1] != 'b' && response[1] != 't'))
+ die("unexpected ls response: not a tree or blob: %s", response);
+ response += strlen(" blob ");
+
+ /* Dataref. */
+ tab = memchr(response, '\t', response_end - response);
+ if (!tab)
+ die("invalid ls response: missing tab: %s", response);
+ strbuf_add(dataref, response, tab - response);
+ return 0;
+}
+
+int fast_export_ls_rev(uint32_t rev, const char *path,
+ uint32_t *mode, struct strbuf *dataref)
+{
+ ls_from_rev(rev, path);
+ return parse_ls_response(get_response_line(), mode, dataref);
+}
+
+int fast_export_ls(const char *path, uint32_t *mode, struct strbuf *dataref)
+{
+ ls_from_active_commit(path);
+ return parse_ls_response(get_response_line(), mode, dataref);
+}
+
+void fast_export_blob_delta(uint32_t mode,
+ uint32_t old_mode, const char *old_data,
+ off_t len, struct line_buffer *input)
+{
+ long postimage_len;
+
+ assert(len >= 0);
+ postimage_len = apply_delta(len, input, old_data, old_mode);
+ if (mode == REPO_MODE_LNK) {
+ buffer_skip_bytes(&postimage, strlen("link "));
+ postimage_len -= strlen("link ");
+ }
+ printf("data %ld\n", postimage_len);
+ buffer_copy_bytes(&postimage, postimage_len);
+ fputc('\n', stdout);
+}
diff --git a/vcs-svn/fast_export.h b/vcs-svn/fast_export.h
new file mode 100644
index 0000000000..8823aca15c
--- /dev/null
+++ b/vcs-svn/fast_export.h
@@ -0,0 +1,27 @@
+#ifndef FAST_EXPORT_H_
+#define FAST_EXPORT_H_
+
+struct strbuf;
+struct line_buffer;
+
+void fast_export_init(int fd);
+void fast_export_deinit(void);
+
+void fast_export_delete(const char *path);
+void fast_export_modify(const char *path, uint32_t mode, const char *dataref);
+void fast_export_begin_commit(uint32_t revision, const char *author,
+ const struct strbuf *log, const char *uuid,
+ const char *url, unsigned long timestamp);
+void fast_export_end_commit(uint32_t revision);
+void fast_export_data(uint32_t mode, off_t len, struct line_buffer *input);
+void fast_export_blob_delta(uint32_t mode,
+ uint32_t old_mode, const char *old_data,
+ off_t len, struct line_buffer *input);
+
+/* If there is no such file at that rev, returns -1, errno == ENOENT. */
+int fast_export_ls_rev(uint32_t rev, const char *path,
+ uint32_t *mode_out, struct strbuf *dataref_out);
+int fast_export_ls(const char *path,
+ uint32_t *mode_out, struct strbuf *dataref_out);
+
+#endif
diff --git a/vcs-svn/line_buffer.c b/vcs-svn/line_buffer.c
new file mode 100644
index 0000000000..57cc1cec03
--- /dev/null
+++ b/vcs-svn/line_buffer.c
@@ -0,0 +1,126 @@
+/*
+ * Licensed under a two-clause BSD-style license.
+ * See LICENSE for details.
+ */
+
+#include "git-compat-util.h"
+#include "line_buffer.h"
+#include "strbuf.h"
+
+#define COPY_BUFFER_LEN 4096
+
+int buffer_init(struct line_buffer *buf, const char *filename)
+{
+ buf->infile = filename ? fopen(filename, "r") : stdin;
+ if (!buf->infile)
+ return -1;
+ return 0;
+}
+
+int buffer_fdinit(struct line_buffer *buf, int fd)
+{
+ buf->infile = fdopen(fd, "r");
+ if (!buf->infile)
+ return -1;
+ return 0;
+}
+
+int buffer_tmpfile_init(struct line_buffer *buf)
+{
+ buf->infile = tmpfile();
+ if (!buf->infile)
+ return -1;
+ return 0;
+}
+
+int buffer_deinit(struct line_buffer *buf)
+{
+ int err;
+ if (buf->infile == stdin)
+ return ferror(buf->infile);
+ err = ferror(buf->infile);
+ err |= fclose(buf->infile);
+ return err;
+}
+
+FILE *buffer_tmpfile_rewind(struct line_buffer *buf)
+{
+ rewind(buf->infile);
+ return buf->infile;
+}
+
+long buffer_tmpfile_prepare_to_read(struct line_buffer *buf)
+{
+ long pos = ftell(buf->infile);
+ if (pos < 0)
+ return error("ftell error: %s", strerror(errno));
+ if (fseek(buf->infile, 0, SEEK_SET))
+ return error("seek error: %s", strerror(errno));
+ return pos;
+}
+
+int buffer_ferror(struct line_buffer *buf)
+{
+ return ferror(buf->infile);
+}
+
+int buffer_read_char(struct line_buffer *buf)
+{
+ return fgetc(buf->infile);
+}
+
+/* Read a line without trailing newline. */
+char *buffer_read_line(struct line_buffer *buf)
+{
+ char *end;
+ if (!fgets(buf->line_buffer, sizeof(buf->line_buffer), buf->infile))
+ /* Error or data exhausted. */
+ return NULL;
+ end = buf->line_buffer + strlen(buf->line_buffer);
+ if (end[-1] == '\n')
+ end[-1] = '\0';
+ else if (feof(buf->infile))
+ ; /* No newline at end of file. That's fine. */
+ else
+ /*
+ * Line was too long.
+ * There is probably a saner way to deal with this,
+ * but for now let's return an error.
+ */
+ return NULL;
+ return buf->line_buffer;
+}
+
+size_t buffer_read_binary(struct line_buffer *buf,
+ struct strbuf *sb, size_t size)
+{
+ return strbuf_fread(sb, size, buf->infile);
+}
+
+off_t buffer_copy_bytes(struct line_buffer *buf, off_t nbytes)
+{
+ char byte_buffer[COPY_BUFFER_LEN];
+ off_t done = 0;
+ while (done < nbytes && !feof(buf->infile) && !ferror(buf->infile)) {
+ off_t len = nbytes - done;
+ size_t in = len < COPY_BUFFER_LEN ? len : COPY_BUFFER_LEN;
+ in = fread(byte_buffer, 1, in, buf->infile);
+ done += in;
+ fwrite(byte_buffer, 1, in, stdout);
+ if (ferror(stdout))
+ return done + buffer_skip_bytes(buf, nbytes - done);
+ }
+ return done;
+}
+
+off_t buffer_skip_bytes(struct line_buffer *buf, off_t nbytes)
+{
+ char byte_buffer[COPY_BUFFER_LEN];
+ off_t done = 0;
+ while (done < nbytes && !feof(buf->infile) && !ferror(buf->infile)) {
+ off_t len = nbytes - done;
+ size_t in = len < COPY_BUFFER_LEN ? len : COPY_BUFFER_LEN;
+ done += fread(byte_buffer, 1, in, buf->infile);
+ }
+ return done;
+}
diff --git a/vcs-svn/line_buffer.h b/vcs-svn/line_buffer.h
new file mode 100644
index 0000000000..ee23b4f490
--- /dev/null
+++ b/vcs-svn/line_buffer.h
@@ -0,0 +1,30 @@
+#ifndef LINE_BUFFER_H_
+#define LINE_BUFFER_H_
+
+#include "strbuf.h"
+
+#define LINE_BUFFER_LEN 10000
+
+struct line_buffer {
+ char line_buffer[LINE_BUFFER_LEN];
+ FILE *infile;
+};
+#define LINE_BUFFER_INIT { "", NULL }
+
+int buffer_init(struct line_buffer *buf, const char *filename);
+int buffer_fdinit(struct line_buffer *buf, int fd);
+int buffer_deinit(struct line_buffer *buf);
+
+int buffer_tmpfile_init(struct line_buffer *buf);
+FILE *buffer_tmpfile_rewind(struct line_buffer *buf); /* prepare to write. */
+long buffer_tmpfile_prepare_to_read(struct line_buffer *buf);
+
+int buffer_ferror(struct line_buffer *buf);
+char *buffer_read_line(struct line_buffer *buf);
+int buffer_read_char(struct line_buffer *buf);
+size_t buffer_read_binary(struct line_buffer *buf, struct strbuf *sb, size_t len);
+/* Returns number of bytes read (not necessarily written). */
+off_t buffer_copy_bytes(struct line_buffer *buf, off_t len);
+off_t buffer_skip_bytes(struct line_buffer *buf, off_t len);
+
+#endif
diff --git a/vcs-svn/line_buffer.txt b/vcs-svn/line_buffer.txt
new file mode 100644
index 0000000000..8e139eb22d
--- /dev/null
+++ b/vcs-svn/line_buffer.txt
@@ -0,0 +1,77 @@
+line_buffer API
+===============
+
+The line_buffer library provides a convenient interface for
+mostly-line-oriented input.
+
+Each line is not permitted to exceed 10000 bytes. The provided
+functions are not thread-safe or async-signal-safe, and like
+`fgets()`, they generally do not function correctly if interrupted
+by a signal without SA_RESTART set.
+
+Calling sequence
+----------------
+
+The calling program:
+
+ - initializes a `struct line_buffer` to LINE_BUFFER_INIT
+ - specifies a file to read with `buffer_init`
+ - processes input with `buffer_read_line`, `buffer_skip_bytes`,
+ and `buffer_copy_bytes`
+ - closes the file with `buffer_deinit`, perhaps to start over and
+ read another file.
+
+When finished, the caller can use `buffer_reset` to deallocate
+resources.
+
+Using temporary files
+---------------------
+
+Temporary files provide a place to store data that should not outlive
+the calling program. A program
+
+ - initializes a `struct line_buffer` to LINE_BUFFER_INIT
+ - requests a temporary file with `buffer_tmpfile_init`
+ - acquires an output handle by calling `buffer_tmpfile_rewind`
+ - uses standard I/O functions like `fprintf` and `fwrite` to fill
+ the temporary file
+ - declares writing is over with `buffer_tmpfile_prepare_to_read`
+ - can re-read what was written with `buffer_read_line`,
+ `buffer_copy_bytes`, and so on
+ - can reuse the temporary file by calling `buffer_tmpfile_rewind`
+ again
+ - removes the temporary file with `buffer_deinit`, perhaps to
+ reuse the line_buffer for some other file.
+
+When finished, the calling program can use `buffer_reset` to deallocate
+resources.
+
+Functions
+---------
+
+`buffer_init`, `buffer_fdinit`::
+ Open the named file or file descriptor for input.
+ buffer_init(buf, NULL) prepares to read from stdin.
+ On failure, returns -1 (with errno indicating the nature
+ of the failure).
+
+`buffer_deinit`::
+ Stop reading from the current file (closing it unless
+ it was stdin). Returns nonzero if `fclose` fails or
+ the error indicator was set.
+
+`buffer_read_line`::
+ Read a line and strip off the trailing newline.
+ On failure or end of file, returns NULL.
+
+`buffer_copy_bytes`::
+ Read `len` bytes of input and dump them to the standard output
+ stream. Returns early for error or end of file.
+
+`buffer_skip_bytes`::
+ Discards `len` bytes from the input stream (stopping early
+ if necessary because of an error or eof). Return value is
+ the number of bytes successfully read.
+
+`buffer_reset`::
+ Deallocates non-static buffers.
diff --git a/vcs-svn/repo_tree.c b/vcs-svn/repo_tree.c
new file mode 100644
index 0000000000..67d27f0b6c
--- /dev/null
+++ b/vcs-svn/repo_tree.c
@@ -0,0 +1,48 @@
+/*
+ * Licensed under a two-clause BSD-style license.
+ * See LICENSE for details.
+ */
+
+#include "git-compat-util.h"
+#include "strbuf.h"
+#include "repo_tree.h"
+#include "fast_export.h"
+
+const char *repo_read_path(const char *path, uint32_t *mode_out)
+{
+ int err;
+ static struct strbuf buf = STRBUF_INIT;
+
+ strbuf_reset(&buf);
+ err = fast_export_ls(path, mode_out, &buf);
+ if (err) {
+ if (errno != ENOENT)
+ die_errno("BUG: unexpected fast_export_ls error");
+ /* Treat missing paths as directories. */
+ *mode_out = REPO_MODE_DIR;
+ return NULL;
+ }
+ return buf.buf;
+}
+
+void repo_copy(uint32_t revision, const char *src, const char *dst)
+{
+ int err;
+ uint32_t mode;
+ static struct strbuf data = STRBUF_INIT;
+
+ strbuf_reset(&data);
+ err = fast_export_ls_rev(revision, src, &mode, &data);
+ if (err) {
+ if (errno != ENOENT)
+ die_errno("BUG: unexpected fast_export_ls_rev error");
+ fast_export_delete(dst);
+ return;
+ }
+ fast_export_modify(dst, mode, data.buf);
+}
+
+void repo_delete(const char *path)
+{
+ fast_export_delete(path);
+}
diff --git a/vcs-svn/repo_tree.h b/vcs-svn/repo_tree.h
new file mode 100644
index 0000000000..889c6a3c95
--- /dev/null
+++ b/vcs-svn/repo_tree.h
@@ -0,0 +1,23 @@
+#ifndef REPO_TREE_H_
+#define REPO_TREE_H_
+
+struct strbuf;
+
+#define REPO_MODE_DIR 0040000
+#define REPO_MODE_BLB 0100644
+#define REPO_MODE_EXE 0100755
+#define REPO_MODE_LNK 0120000
+
+uint32_t next_blob_mark(void);
+void repo_copy(uint32_t revision, const char *src, const char *dst);
+void repo_add(const char *path, uint32_t mode, uint32_t blob_mark);
+const char *repo_read_path(const char *path, uint32_t *mode_out);
+void repo_delete(const char *path);
+void repo_commit(uint32_t revision, const char *author,
+ const struct strbuf *log, const char *uuid, const char *url,
+ long unsigned timestamp);
+void repo_diff(uint32_t r1, uint32_t r2);
+void repo_init(void);
+void repo_reset(void);
+
+#endif
diff --git a/vcs-svn/sliding_window.c b/vcs-svn/sliding_window.c
new file mode 100644
index 0000000000..f11d490995
--- /dev/null
+++ b/vcs-svn/sliding_window.c
@@ -0,0 +1,79 @@
+/*
+ * Licensed under a two-clause BSD-style license.
+ * See LICENSE for details.
+ */
+
+#include "git-compat-util.h"
+#include "sliding_window.h"
+#include "line_buffer.h"
+#include "strbuf.h"
+
+static int input_error(struct line_buffer *file)
+{
+ if (!buffer_ferror(file))
+ return error("delta preimage ends early");
+ return error("cannot read delta preimage: %s", strerror(errno));
+}
+
+static int skip_or_whine(struct line_buffer *file, off_t gap)
+{
+ if (buffer_skip_bytes(file, gap) != gap)
+ return input_error(file);
+ return 0;
+}
+
+static int read_to_fill_or_whine(struct line_buffer *file,
+ struct strbuf *buf, size_t width)
+{
+ buffer_read_binary(file, buf, width - buf->len);
+ if (buf->len != width)
+ return input_error(file);
+ return 0;
+}
+
+static int check_offset_overflow(off_t offset, uintmax_t len)
+{
+ if (len > maximum_signed_value_of_type(off_t))
+ return error("unrepresentable length in delta: "
+ "%"PRIuMAX" > OFF_MAX", len);
+ if (signed_add_overflows(offset, (off_t) len))
+ return error("unrepresentable offset in delta: "
+ "%"PRIuMAX" + %"PRIuMAX" > OFF_MAX",
+ (uintmax_t) offset, len);
+ return 0;
+}
+
+int move_window(struct sliding_view *view, off_t off, size_t width)
+{
+ off_t file_offset;
+ assert(view);
+ assert(view->width <= view->buf.len);
+ assert(!check_offset_overflow(view->off, view->buf.len));
+
+ if (check_offset_overflow(off, width))
+ return -1;
+ if (off < view->off || off + width < view->off + view->width)
+ return error("invalid delta: window slides left");
+ if (view->max_off >= 0 && view->max_off < off + (off_t) width)
+ return error("delta preimage ends early");
+
+ file_offset = view->off + view->buf.len;
+ if (off < file_offset) {
+ /* Move the overlapping region into place. */
+ strbuf_remove(&view->buf, 0, off - view->off);
+ } else {
+ /* Seek ahead to skip the gap. */
+ if (skip_or_whine(view->file, off - file_offset))
+ return -1;
+ strbuf_setlen(&view->buf, 0);
+ }
+
+ if (view->buf.len > width)
+ ; /* Already read. */
+ else if (read_to_fill_or_whine(view->file, &view->buf, width))
+ return -1;
+
+ view->off = off;
+ view->width = width;
+ return 0;
+}
diff --git a/vcs-svn/sliding_window.h b/vcs-svn/sliding_window.h
new file mode 100644
index 0000000000..b43a825cba
--- /dev/null
+++ b/vcs-svn/sliding_window.h
@@ -0,0 +1,18 @@
+#ifndef SLIDING_WINDOW_H_
+#define SLIDING_WINDOW_H_
+
+#include "strbuf.h"
+
+struct sliding_view {
+ struct line_buffer *file;
+ off_t off;
+ size_t width;
+ off_t max_off; /* -1 means unlimited */
+ struct strbuf buf;
+};
+
+#define SLIDING_VIEW_INIT(input, len) { (input), 0, 0, (len), STRBUF_INIT }
+
+extern int move_window(struct sliding_view *view, off_t off, size_t width);
+
+#endif
diff --git a/vcs-svn/svndiff.c b/vcs-svn/svndiff.c
new file mode 100644
index 0000000000..74c97c4543
--- /dev/null
+++ b/vcs-svn/svndiff.c
@@ -0,0 +1,309 @@
+/*
+ * Licensed under a two-clause BSD-style license.
+ * See LICENSE for details.
+ */
+
+#include "git-compat-util.h"
+#include "sliding_window.h"
+#include "line_buffer.h"
+#include "svndiff.h"
+
+/*
+ * svndiff0 applier
+ *
+ * See http://svn.apache.org/repos/asf/subversion/trunk/notes/svndiff.
+ *
+ * svndiff0 ::= 'SVN\0' window*
+ * window ::= int int int int int instructions inline_data;
+ * instructions ::= instruction*;
+ * instruction ::= view_selector int int
+ * | copyfrom_data int
+ * | packed_view_selector int
+ * | packed_copyfrom_data
+ * ;
+ * view_selector ::= copyfrom_source
+ * | copyfrom_target
+ * ;
+ * copyfrom_source ::= # binary 00 000000;
+ * copyfrom_target ::= # binary 01 000000;
+ * copyfrom_data ::= # binary 10 000000;
+ * packed_view_selector ::= # view_selector OR-ed with 6 bit value;
+ * packed_copyfrom_data ::= # copyfrom_data OR-ed with 6 bit value;
+ * int ::= highdigit* lowdigit;
+ * highdigit ::= # binary 1000 0000 OR-ed with 7 bit value;
+ * lowdigit ::= # 7 bit value;
+ */
+
+#define INSN_MASK 0xc0
+#define INSN_COPYFROM_SOURCE 0x00
+#define INSN_COPYFROM_TARGET 0x40
+#define INSN_COPYFROM_DATA 0x80
+#define OPERAND_MASK 0x3f
+
+#define VLI_CONTINUE 0x80
+#define VLI_DIGIT_MASK 0x7f
+#define VLI_BITS_PER_DIGIT 7
+
+struct window {
+ struct sliding_view *in;
+ struct strbuf out;
+ struct strbuf instructions;
+ struct strbuf data;
+};
+
+#define WINDOW_INIT(w) { (w), STRBUF_INIT, STRBUF_INIT, STRBUF_INIT }
+
+static void window_release(struct window *ctx)
+{
+ strbuf_release(&ctx->out);
+ strbuf_release(&ctx->instructions);
+ strbuf_release(&ctx->data);
+}
+
+static int write_strbuf(struct strbuf *sb, FILE *out)
+{
+ if (fwrite(sb->buf, 1, sb->len, out) == sb->len) /* Success. */
+ return 0;
+ return error("cannot write delta postimage: %s", strerror(errno));
+}
+
+static int error_short_read(struct line_buffer *input)
+{
+ if (buffer_ferror(input))
+ return error("error reading delta: %s", strerror(errno));
+ return error("invalid delta: unexpected end of file");
+}
+
+static int read_chunk(struct line_buffer *delta, off_t *delta_len,
+ struct strbuf *buf, size_t len)
+{
+ assert(*delta_len >= 0);
+ strbuf_reset(buf);
+ if (len > (uintmax_t) *delta_len ||
+ buffer_read_binary(delta, buf, len) != len)
+ return error_short_read(delta);
+ *delta_len -= buf->len;
+ return 0;
+}
+
+static int read_magic(struct line_buffer *in, off_t *len)
+{
+ static const char magic[] = {'S', 'V', 'N', '\0'};
+ struct strbuf sb = STRBUF_INIT;
+
+ if (read_chunk(in, len, &sb, sizeof(magic))) {
+ strbuf_release(&sb);
+ return -1;
+ }
+ if (memcmp(sb.buf, magic, sizeof(magic))) {
+ strbuf_release(&sb);
+ return error("invalid delta: unrecognized file type");
+ }
+ strbuf_release(&sb);
+ return 0;
+}
+
+static int read_int(struct line_buffer *in, uintmax_t *result, off_t *len)
+{
+ uintmax_t rv = 0;
+ off_t sz;
+ for (sz = *len; sz; sz--) {
+ const int ch = buffer_read_char(in);
+ if (ch == EOF)
+ break;
+
+ rv <<= VLI_BITS_PER_DIGIT;
+ rv += (ch & VLI_DIGIT_MASK);
+ if (ch & VLI_CONTINUE)
+ continue;
+
+ *result = rv;
+ *len = sz - 1;
+ return 0;
+ }
+ return error_short_read(in);
+}
+
+static int parse_int(const char **buf, size_t *result, const char *end)
+{
+ size_t rv = 0;
+ const char *pos;
+ for (pos = *buf; pos != end; pos++) {
+ unsigned char ch = *pos;
+
+ rv <<= VLI_BITS_PER_DIGIT;
+ rv += (ch & VLI_DIGIT_MASK);
+ if (ch & VLI_CONTINUE)
+ continue;
+
+ *result = rv;
+ *buf = pos + 1;
+ return 0;
+ }
+ return error("invalid delta: unexpected end of instructions section");
+}
+
+static int read_offset(struct line_buffer *in, off_t *result, off_t *len)
+{
+ uintmax_t val;
+ if (read_int(in, &val, len))
+ return -1;
+ if (val > maximum_signed_value_of_type(off_t))
+ return error("unrepresentable offset in delta: %"PRIuMAX"", val);
+ *result = val;
+ return 0;
+}
+
+static int read_length(struct line_buffer *in, size_t *result, off_t *len)
+{
+ uintmax_t val;
+ if (read_int(in, &val, len))
+ return -1;
+ if (val > SIZE_MAX)
+ return error("unrepresentable length in delta: %"PRIuMAX"", val);
+ *result = val;
+ return 0;
+}
+
+static int copyfrom_source(struct window *ctx, const char **instructions,
+ size_t nbytes, const char *insns_end)
+{
+ size_t offset;
+ if (parse_int(instructions, &offset, insns_end))
+ return -1;
+ if (unsigned_add_overflows(offset, nbytes) ||
+ offset + nbytes > ctx->in->width)
+ return error("invalid delta: copies source data outside view");
+ strbuf_add(&ctx->out, ctx->in->buf.buf + offset, nbytes);
+ return 0;
+}
+
+static int copyfrom_target(struct window *ctx, const char **instructions,
+ size_t nbytes, const char *instructions_end)
+{
+ size_t offset;
+ if (parse_int(instructions, &offset, instructions_end))
+ return -1;
+ if (offset >= ctx->out.len)
+ return error("invalid delta: copies from the future");
+ for (; nbytes > 0; nbytes--)
+ strbuf_addch(&ctx->out, ctx->out.buf[offset++]);
+ return 0;
+}
+
+static int copyfrom_data(struct window *ctx, size_t *data_pos, size_t nbytes)
+{
+ const size_t pos = *data_pos;
+ if (unsigned_add_overflows(pos, nbytes) ||
+ pos + nbytes > ctx->data.len)
+ return error("invalid delta: copies unavailable inline data");
+ strbuf_add(&ctx->out, ctx->data.buf + pos, nbytes);
+ *data_pos += nbytes;
+ return 0;
+}
+
+static int parse_first_operand(const char **buf, size_t *out, const char *end)
+{
+ size_t result = (unsigned char) *(*buf)++ & OPERAND_MASK;
+ if (result) { /* immediate operand */
+ *out = result;
+ return 0;
+ }
+ return parse_int(buf, out, end);
+}
+
+static int execute_one_instruction(struct window *ctx,
+ const char **instructions, size_t *data_pos)
+{
+ unsigned int instruction;
+ const char *insns_end = ctx->instructions.buf + ctx->instructions.len;
+ size_t nbytes;
+ assert(ctx);
+ assert(instructions && *instructions);
+ assert(data_pos);
+
+ instruction = (unsigned char) **instructions;
+ if (parse_first_operand(instructions, &nbytes, insns_end))
+ return -1;
+ switch (instruction & INSN_MASK) {
+ case INSN_COPYFROM_SOURCE:
+ return copyfrom_source(ctx, instructions, nbytes, insns_end);
+ case INSN_COPYFROM_TARGET:
+ return copyfrom_target(ctx, instructions, nbytes, insns_end);
+ case INSN_COPYFROM_DATA:
+ return copyfrom_data(ctx, data_pos, nbytes);
+ default:
+ return error("invalid delta: unrecognized instruction");
+ }
+}
+
+static int apply_window_in_core(struct window *ctx)
+{
+ const char *instructions;
+ size_t data_pos = 0;
+
+ /*
+ * Fill ctx->out.buf using data from the source, target,
+ * and inline data views.
+ */
+ for (instructions = ctx->instructions.buf;
+ instructions != ctx->instructions.buf + ctx->instructions.len;
+ )
+ if (execute_one_instruction(ctx, &instructions, &data_pos))
+ return -1;
+ if (data_pos != ctx->data.len)
+ return error("invalid delta: does not copy all inline data");
+ return 0;
+}
+
+static int apply_one_window(struct line_buffer *delta, off_t *delta_len,
+ struct sliding_view *preimage, FILE *out)
+{
+ int rv = -1;
+ struct window ctx = WINDOW_INIT(preimage);
+ size_t out_len;
+ size_t instructions_len;
+ size_t data_len;
+ assert(delta_len);
+
+ /* "source view" offset and length already handled; */
+ if (read_length(delta, &out_len, delta_len) ||
+ read_length(delta, &instructions_len, delta_len) ||
+ read_length(delta, &data_len, delta_len) ||
+ read_chunk(delta, delta_len, &ctx.instructions, instructions_len) ||
+ read_chunk(delta, delta_len, &ctx.data, data_len))
+ goto error_out;
+ strbuf_grow(&ctx.out, out_len);
+ if (apply_window_in_core(&ctx))
+ goto error_out;
+ if (ctx.out.len != out_len) {
+ rv = error("invalid delta: incorrect postimage length");
+ goto error_out;
+ }
+ if (write_strbuf(&ctx.out, out))
+ goto error_out;
+ rv = 0;
+error_out:
+ window_release(&ctx);
+ return rv;
+}
+
+int svndiff0_apply(struct line_buffer *delta, off_t delta_len,
+ struct sliding_view *preimage, FILE *postimage)
+{
+ assert(delta && preimage && postimage && delta_len >= 0);
+
+ if (read_magic(delta, &delta_len))
+ return -1;
+ while (delta_len) { /* For each window: */
+ off_t pre_off = -1;
+ size_t pre_len;
+
+ if (read_offset(delta, &pre_off, &delta_len) ||
+ read_length(delta, &pre_len, &delta_len) ||
+ move_window(preimage, pre_off, pre_len) ||
+ apply_one_window(delta, &delta_len, preimage, postimage))
+ return -1;
+ }
+ return 0;
+}
diff --git a/vcs-svn/svndiff.h b/vcs-svn/svndiff.h
new file mode 100644
index 0000000000..74eb464bab
--- /dev/null
+++ b/vcs-svn/svndiff.h
@@ -0,0 +1,10 @@
+#ifndef SVNDIFF_H_
+#define SVNDIFF_H_
+
+struct line_buffer;
+struct sliding_view;
+
+extern int svndiff0_apply(struct line_buffer *delta, off_t delta_len,
+ struct sliding_view *preimage, FILE *postimage);
+
+#endif
diff --git a/vcs-svn/svndump.c b/vcs-svn/svndump.c
new file mode 100644
index 0000000000..2b168aee75
--- /dev/null
+++ b/vcs-svn/svndump.c
@@ -0,0 +1,509 @@
+/*
+ * Parse and rearrange a svnadmin dump.
+ * Create the dump with:
+ * svnadmin dump --incremental -r<startrev>:<endrev> <repository> >outfile
+ *
+ * Licensed under a two-clause BSD-style license.
+ * See LICENSE for details.
+ */
+
+#include "cache.h"
+#include "repo_tree.h"
+#include "fast_export.h"
+#include "line_buffer.h"
+#include "strbuf.h"
+#include "svndump.h"
+
+/*
+ * Compare start of string to literal of equal length;
+ * must be guarded by length test.
+ */
+#define constcmp(s, ref) memcmp(s, ref, sizeof(ref) - 1)
+
+#define REPORT_FILENO 3
+
+#define NODEACT_REPLACE 4
+#define NODEACT_DELETE 3
+#define NODEACT_ADD 2
+#define NODEACT_CHANGE 1
+#define NODEACT_UNKNOWN 0
+
+/* States: */
+#define DUMP_CTX 0 /* dump metadata */
+#define REV_CTX 1 /* revision metadata */
+#define NODE_CTX 2 /* node metadata */
+#define INTERNODE_CTX 3 /* between nodes */
+
+#define DATE_RFC2822_LEN 31
+
+static struct line_buffer input = LINE_BUFFER_INIT;
+
+static struct {
+ uint32_t action, srcRev, type;
+ off_t prop_length, text_length;
+ struct strbuf src, dst;
+ uint32_t text_delta, prop_delta;
+} node_ctx;
+
+static struct {
+ uint32_t revision;
+ unsigned long timestamp;
+ struct strbuf log, author;
+} rev_ctx;
+
+static struct {
+ uint32_t version;
+ struct strbuf uuid, url;
+} dump_ctx;
+
+static void reset_node_ctx(char *fname)
+{
+ node_ctx.type = 0;
+ node_ctx.action = NODEACT_UNKNOWN;
+ node_ctx.prop_length = -1;
+ node_ctx.text_length = -1;
+ strbuf_reset(&node_ctx.src);
+ node_ctx.srcRev = 0;
+ strbuf_reset(&node_ctx.dst);
+ if (fname)
+ strbuf_addstr(&node_ctx.dst, fname);
+ node_ctx.text_delta = 0;
+ node_ctx.prop_delta = 0;
+}
+
+static void reset_rev_ctx(uint32_t revision)
+{
+ rev_ctx.revision = revision;
+ rev_ctx.timestamp = 0;
+ strbuf_reset(&rev_ctx.log);
+ strbuf_reset(&rev_ctx.author);
+}
+
+static void reset_dump_ctx(const char *url)
+{
+ strbuf_reset(&dump_ctx.url);
+ if (url)
+ strbuf_addstr(&dump_ctx.url, url);
+ dump_ctx.version = 1;
+ strbuf_reset(&dump_ctx.uuid);
+}
+
+static void handle_property(const struct strbuf *key_buf,
+ struct strbuf *val,
+ uint32_t *type_set)
+{
+ const char *key = key_buf->buf;
+ size_t keylen = key_buf->len;
+
+ switch (keylen + 1) {
+ case sizeof("svn:log"):
+ if (constcmp(key, "svn:log"))
+ break;
+ if (!val)
+ die("invalid dump: unsets svn:log");
+ strbuf_swap(&rev_ctx.log, val);
+ break;
+ case sizeof("svn:author"):
+ if (constcmp(key, "svn:author"))
+ break;
+ if (!val)
+ strbuf_reset(&rev_ctx.author);
+ else
+ strbuf_swap(&rev_ctx.author, val);
+ break;
+ case sizeof("svn:date"):
+ if (constcmp(key, "svn:date"))
+ break;
+ if (!val)
+ die("invalid dump: unsets svn:date");
+ if (parse_date_basic(val->buf, &rev_ctx.timestamp, NULL))
+ warning("invalid timestamp: %s", val->buf);
+ break;
+ case sizeof("svn:executable"):
+ case sizeof("svn:special"):
+ if (keylen == strlen("svn:executable") &&
+ constcmp(key, "svn:executable"))
+ break;
+ if (keylen == strlen("svn:special") &&
+ constcmp(key, "svn:special"))
+ break;
+ if (*type_set) {
+ if (!val)
+ return;
+ die("invalid dump: sets type twice");
+ }
+ if (!val) {
+ node_ctx.type = REPO_MODE_BLB;
+ return;
+ }
+ *type_set = 1;
+ node_ctx.type = keylen == strlen("svn:executable") ?
+ REPO_MODE_EXE :
+ REPO_MODE_LNK;
+ }
+}
+
+static void die_short_read(void)
+{
+ if (buffer_ferror(&input))
+ die_errno("error reading dump file");
+ die("invalid dump: unexpected end of file");
+}
+
+static void read_props(void)
+{
+ static struct strbuf key = STRBUF_INIT;
+ static struct strbuf val = STRBUF_INIT;
+ const char *t;
+ /*
+ * NEEDSWORK: to support simple mode changes like
+ * K 11
+ * svn:special
+ * V 1
+ * *
+ * D 14
+ * svn:executable
+ * we keep track of whether a mode has been set and reset to
+ * plain file only if not. We should be keeping track of the
+ * symlink and executable bits separately instead.
+ */
+ uint32_t type_set = 0;
+ while ((t = buffer_read_line(&input)) && strcmp(t, "PROPS-END")) {
+ uint32_t len;
+ const char type = t[0];
+ int ch;
+
+ if (!type || t[1] != ' ')
+ die("invalid property line: %s", t);
+ len = atoi(&t[2]);
+ strbuf_reset(&val);
+ buffer_read_binary(&input, &val, len);
+ if (val.len < len)
+ die_short_read();
+
+ /* Discard trailing newline. */
+ ch = buffer_read_char(&input);
+ if (ch == EOF)
+ die_short_read();
+ if (ch != '\n')
+ die("invalid dump: expected newline after %s", val.buf);
+
+ switch (type) {
+ case 'K':
+ strbuf_swap(&key, &val);
+ continue;
+ case 'D':
+ handle_property(&val, NULL, &type_set);
+ continue;
+ case 'V':
+ handle_property(&key, &val, &type_set);
+ strbuf_reset(&key);
+ continue;
+ default:
+ die("invalid property line: %s", t);
+ }
+ }
+}
+
+static void handle_node(void)
+{
+ const uint32_t type = node_ctx.type;
+ const int have_props = node_ctx.prop_length != -1;
+ const int have_text = node_ctx.text_length != -1;
+ /*
+ * Old text for this node:
+ * NULL - directory or bug
+ * empty_blob - empty
+ * "<dataref>" - data retrievable from fast-import
+ */
+ static const char *const empty_blob = "::empty::";
+ const char *old_data = NULL;
+ uint32_t old_mode = REPO_MODE_BLB;
+
+ if (node_ctx.action == NODEACT_DELETE) {
+ if (have_text || have_props || node_ctx.srcRev)
+ die("invalid dump: deletion node has "
+ "copyfrom info, text, or properties");
+ repo_delete(node_ctx.dst.buf);
+ return;
+ }
+ if (node_ctx.action == NODEACT_REPLACE) {
+ repo_delete(node_ctx.dst.buf);
+ node_ctx.action = NODEACT_ADD;
+ }
+ if (node_ctx.srcRev) {
+ repo_copy(node_ctx.srcRev, node_ctx.src.buf, node_ctx.dst.buf);
+ if (node_ctx.action == NODEACT_ADD)
+ node_ctx.action = NODEACT_CHANGE;
+ }
+ if (have_text && type == REPO_MODE_DIR)
+ die("invalid dump: directories cannot have text attached");
+
+ /*
+ * Find old content (old_data) and decide on the new mode.
+ */
+ if (node_ctx.action == NODEACT_CHANGE && !*node_ctx.dst.buf) {
+ if (type != REPO_MODE_DIR)
+ die("invalid dump: root of tree is not a regular file");
+ old_data = NULL;
+ } else if (node_ctx.action == NODEACT_CHANGE) {
+ uint32_t mode;
+ old_data = repo_read_path(node_ctx.dst.buf, &mode);
+ if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
+ die("invalid dump: cannot modify a directory into a file");
+ if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
+ die("invalid dump: cannot modify a file into a directory");
+ node_ctx.type = mode;
+ old_mode = mode;
+ } else if (node_ctx.action == NODEACT_ADD) {
+ if (type == REPO_MODE_DIR)
+ old_data = NULL;
+ else if (have_text)
+ old_data = empty_blob;
+ else
+ die("invalid dump: adds node without text");
+ } else {
+ die("invalid dump: Node-path block lacks Node-action");
+ }
+
+ /*
+ * Adjust mode to reflect properties.
+ */
+ if (have_props) {
+ if (!node_ctx.prop_delta)
+ node_ctx.type = type;
+ if (node_ctx.prop_length)
+ read_props();
+ }
+
+ /*
+ * Save the result.
+ */
+ if (type == REPO_MODE_DIR) /* directories are not tracked. */
+ return;
+ assert(old_data);
+ if (old_data == empty_blob)
+ /* For the fast_export_* functions, NULL means empty. */
+ old_data = NULL;
+ if (!have_text) {
+ fast_export_modify(node_ctx.dst.buf, node_ctx.type, old_data);
+ return;
+ }
+ if (!node_ctx.text_delta) {
+ fast_export_modify(node_ctx.dst.buf, node_ctx.type, "inline");
+ fast_export_data(node_ctx.type, node_ctx.text_length, &input);
+ return;
+ }
+ fast_export_modify(node_ctx.dst.buf, node_ctx.type, "inline");
+ fast_export_blob_delta(node_ctx.type, old_mode, old_data,
+ node_ctx.text_length, &input);
+}
+
+static void begin_revision(void)
+{
+ if (!rev_ctx.revision) /* revision 0 gets no git commit. */
+ return;
+ fast_export_begin_commit(rev_ctx.revision, rev_ctx.author.buf,
+ &rev_ctx.log, dump_ctx.uuid.buf, dump_ctx.url.buf,
+ rev_ctx.timestamp);
+}
+
+static void end_revision(void)
+{
+ if (rev_ctx.revision)
+ fast_export_end_commit(rev_ctx.revision);
+}
+
+void svndump_read(const char *url)
+{
+ char *val;
+ char *t;
+ uint32_t active_ctx = DUMP_CTX;
+ uint32_t len;
+
+ reset_dump_ctx(url);
+ while ((t = buffer_read_line(&input))) {
+ val = strchr(t, ':');
+ if (!val)
+ continue;
+ val++;
+ if (*val != ' ')
+ continue;
+ val++;
+
+ /* strlen(key) + 1 */
+ switch (val - t - 1) {
+ case sizeof("SVN-fs-dump-format-version"):
+ if (constcmp(t, "SVN-fs-dump-format-version"))
+ continue;
+ dump_ctx.version = atoi(val);
+ if (dump_ctx.version > 3)
+ die("expected svn dump format version <= 3, found %"PRIu32,
+ dump_ctx.version);
+ break;
+ case sizeof("UUID"):
+ if (constcmp(t, "UUID"))
+ continue;
+ strbuf_reset(&dump_ctx.uuid);
+ strbuf_addstr(&dump_ctx.uuid, val);
+ break;
+ case sizeof("Revision-number"):
+ if (constcmp(t, "Revision-number"))
+ continue;
+ if (active_ctx == NODE_CTX)
+ handle_node();
+ if (active_ctx == REV_CTX)
+ begin_revision();
+ if (active_ctx != DUMP_CTX)
+ end_revision();
+ active_ctx = REV_CTX;
+ reset_rev_ctx(atoi(val));
+ break;
+ case sizeof("Node-path"):
+ if (constcmp(t, "Node-"))
+ continue;
+ if (!constcmp(t + strlen("Node-"), "path")) {
+ if (active_ctx == NODE_CTX)
+ handle_node();
+ if (active_ctx == REV_CTX)
+ begin_revision();
+ active_ctx = NODE_CTX;
+ reset_node_ctx(val);
+ break;
+ }
+ if (constcmp(t + strlen("Node-"), "kind"))
+ continue;
+ if (!strcmp(val, "dir"))
+ node_ctx.type = REPO_MODE_DIR;
+ else if (!strcmp(val, "file"))
+ node_ctx.type = REPO_MODE_BLB;
+ else
+ fprintf(stderr, "Unknown node-kind: %s\n", val);
+ break;
+ case sizeof("Node-action"):
+ if (constcmp(t, "Node-action"))
+ continue;
+ if (!strcmp(val, "delete")) {
+ node_ctx.action = NODEACT_DELETE;
+ } else if (!strcmp(val, "add")) {
+ node_ctx.action = NODEACT_ADD;
+ } else if (!strcmp(val, "change")) {
+ node_ctx.action = NODEACT_CHANGE;
+ } else if (!strcmp(val, "replace")) {
+ node_ctx.action = NODEACT_REPLACE;
+ } else {
+ fprintf(stderr, "Unknown node-action: %s\n", val);
+ node_ctx.action = NODEACT_UNKNOWN;
+ }
+ break;
+ case sizeof("Node-copyfrom-path"):
+ if (constcmp(t, "Node-copyfrom-path"))
+ continue;
+ strbuf_reset(&node_ctx.src);
+ strbuf_addstr(&node_ctx.src, val);
+ break;
+ case sizeof("Node-copyfrom-rev"):
+ if (constcmp(t, "Node-copyfrom-rev"))
+ continue;
+ node_ctx.srcRev = atoi(val);
+ break;
+ case sizeof("Text-content-length"):
+ if (constcmp(t, "Text") && constcmp(t, "Prop"))
+ continue;
+ if (constcmp(t + 4, "-content-length"))
+ continue;
+ {
+ char *end;
+ uintmax_t len;
+
+ len = strtoumax(val, &end, 10);
+ if (!isdigit(*val) || *end)
+ die("invalid dump: non-numeric length %s", val);
+ if (len > maximum_signed_value_of_type(off_t))
+ die("unrepresentable length in dump: %s", val);
+
+ if (*t == 'T')
+ node_ctx.text_length = (off_t) len;
+ else
+ node_ctx.prop_length = (off_t) len;
+ break;
+ }
+ case sizeof("Text-delta"):
+ if (!constcmp(t, "Text-delta")) {
+ node_ctx.text_delta = !strcmp(val, "true");
+ break;
+ }
+ if (constcmp(t, "Prop-delta"))
+ continue;
+ node_ctx.prop_delta = !strcmp(val, "true");
+ break;
+ case sizeof("Content-length"):
+ if (constcmp(t, "Content-length"))
+ continue;
+ len = atoi(val);
+ t = buffer_read_line(&input);
+ if (!t)
+ die_short_read();
+ if (*t)
+ die("invalid dump: expected blank line after content length header");
+ if (active_ctx == REV_CTX) {
+ read_props();
+ } else if (active_ctx == NODE_CTX) {
+ handle_node();
+ active_ctx = INTERNODE_CTX;
+ } else {
+ fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
+ if (buffer_skip_bytes(&input, len) != len)
+ die_short_read();
+ }
+ }
+ }
+ if (buffer_ferror(&input))
+ die_short_read();
+ if (active_ctx == NODE_CTX)
+ handle_node();
+ if (active_ctx == REV_CTX)
+ begin_revision();
+ if (active_ctx != DUMP_CTX)
+ end_revision();
+}
+
+int svndump_init(const char *filename)
+{
+ if (buffer_init(&input, filename))
+ return error("cannot open %s: %s", filename, strerror(errno));
+ fast_export_init(REPORT_FILENO);
+ strbuf_init(&dump_ctx.uuid, 4096);
+ strbuf_init(&dump_ctx.url, 4096);
+ strbuf_init(&rev_ctx.log, 4096);
+ strbuf_init(&rev_ctx.author, 4096);
+ strbuf_init(&node_ctx.src, 4096);
+ strbuf_init(&node_ctx.dst, 4096);
+ reset_dump_ctx(NULL);
+ reset_rev_ctx(0);
+ reset_node_ctx(NULL);
+ return 0;
+}
+
+void svndump_deinit(void)
+{
+ fast_export_deinit();
+ reset_dump_ctx(NULL);
+ reset_rev_ctx(0);
+ reset_node_ctx(NULL);
+ strbuf_release(&rev_ctx.log);
+ strbuf_release(&node_ctx.src);
+ strbuf_release(&node_ctx.dst);
+ if (buffer_deinit(&input))
+ fprintf(stderr, "Input error\n");
+ if (ferror(stdout))
+ fprintf(stderr, "Output error\n");
+}
+
+void svndump_reset(void)
+{
+ strbuf_release(&dump_ctx.uuid);
+ strbuf_release(&dump_ctx.url);
+ strbuf_release(&rev_ctx.log);
+ strbuf_release(&rev_ctx.author);
+}
diff --git a/vcs-svn/svndump.h b/vcs-svn/svndump.h
new file mode 100644
index 0000000000..df9ceb0e8d
--- /dev/null
+++ b/vcs-svn/svndump.h
@@ -0,0 +1,9 @@
+#ifndef SVNDUMP_H_
+#define SVNDUMP_H_
+
+int svndump_init(const char *filename);
+void svndump_read(const char *url);
+void svndump_deinit(void);
+void svndump_reset(void);
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 18:05:09 +0000