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rcsfile.c
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rcsfile.c
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/*-
* Copyright (c) 2007-2009, Ulf Lilleengen <lulf@FreeBSD.org>
* All rights reserved.
*
* 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, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
*/
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "diff.h"
#include "keyword.h"
#include "misc.h"
#include "proto.h"
#include "queue.h"
#include "rcsfile.h"
#include "rcsparse.h"
#include "stream.h"
#define BUF_SIZE_DEFAULT 128
/*
* RCS parser library. This is the part of the library that handles the
* importing, editing and exporting of RCS files. It currently supports only the
* part of the RCS file specification that is needed for csup (for instance,
* newphrases are not supported), and assumes that you can store the whole RCS
* file in memory.
*/
/*
* Linked list for string tokens.
*/
struct string {
char *str;
STAILQ_ENTRY(string) string_next;
};
/*
* Linked list of tags and revision numbers, in the RCS file header.
*/
struct tag {
char *tag;
char *revnum;
STAILQ_ENTRY(tag) tag_next;
};
/*
* A RCS delta. The delta is identified by a revision number, and contains the
* most important RCS attributes that is needed by csup. It also contains
* pointers to other nodes in the RCS file delta structure.
*/
struct delta {
char *revdate;
char *revnum;
char *author;
char *state;
struct buf *log;
struct buf *text;
int placeholder;
struct delta *diffbase;
struct delta *prev;
LIST_ENTRY(delta) delta_next;
STAILQ_ENTRY(delta) delta_prev;
LIST_ENTRY(delta) table_next;
STAILQ_ENTRY(delta) stack_next;
LIST_HEAD(, branch) branchlist;
LIST_ENTRY(delta) branch_next_date;
};
/*
* A branch data structure containing information about deltas in the branch as
* well as a base revision number.
*/
struct branch {
char *revnum;
LIST_HEAD(, delta) deltalist; /* Next delta in our branch. */
LIST_ENTRY(branch) branch_next;
};
/*
* The rcsfile structure is the "main" structure of the RCS parser library. It
* contains administrative data as well as pointers to the deltas within the
* file.
*/
struct rcsfile {
char *name;
char *head;
char *branch; /* Default branch. */
char *cvsroot;
char *colltag;
STAILQ_HEAD(, string) accesslist;
STAILQ_HEAD(, tag) taglist;
int strictlock;
char *comment;
size_t commentlen;
char *desc;
size_t desclen;
int expand;
int ro;
struct branch *trunk; /* The tip delta. */
LIST_HEAD(, delta) deltatable;
};
static void rcsfile_freedelta(struct delta *);
static void rcsfile_insertdelta(struct branch *, struct delta *,
int);
static struct delta *rcsfile_createdelta(char *);
static int rcsfile_write_deltatext(struct rcsfile *,
struct stream *);
static int rcsfile_puttext(struct rcsfile *, struct stream *,
struct delta *, struct delta *);
static struct branch *rcsfile_getbranch(struct rcsfile *, char *);
static void rcsfile_insertsorteddelta(struct rcsfile *,
struct delta *);
static struct stream *rcsfile_getdeltatext(struct rcsfile *, struct delta *,
struct buf **);
static int rcsdelta_writestring(char *, size_t, struct stream *);
static void rcsdelta_insertbranch(struct delta *, struct branch *);
/* Space formatting of RCS file. */
const char *head_space = "\t";
const char *branch_space = "\t";
const char *tag_space = "\t";
const char *date_space = "\t";
const char *auth_space = "\t";
const char *state_space = "\t";
const char *next_space = "\t";
const char *branches_space = "\t";
const char *comment_space ="\t";
const char *expand_space = "\t";
void print_stream(struct stream *);
/* Print the contents of a stream, for debugging. */
void
print_stream(struct stream *s)
{
char *line;
line = stream_getln(s, NULL);
while (line != NULL) {
lprintf(-1, "%s\n", line);
line = stream_getln(s, NULL);
}
lprintf(-1, "\n");
}
/*
* Parse rcsfile from path and return a pointer to it.
*/
struct rcsfile *
rcsfile_frompath(const char *path, const char *name, const char *cvsroot,
const char *colltag, int ro)
{
struct rcsfile *rf;
int error;
assert(path != NULL && name != NULL && cvsroot != NULL &&
colltag != NULL);
rf = xmalloc(sizeof(struct rcsfile));
rf->name = xstrdup(name);
rf->cvsroot = xstrdup(cvsroot);
rf->colltag = xstrdup(colltag);
/* Initialize head branch. */
rf->trunk = xmalloc(sizeof(struct branch));
rf->trunk->revnum = xstrdup("1");
LIST_INIT(&rf->trunk->deltalist);
/* Initialize delta list. */
LIST_INIT(&rf->deltatable);
/* Initialize tag list. */
STAILQ_INIT(&rf->taglist);
/* Initialize accesslist. */
STAILQ_INIT(&rf->accesslist);
/* Initialize all fields. */
rf->head = NULL;
rf->branch = NULL;
rf->strictlock = 0;
rf->comment = NULL;
rf->commentlen = 0;
rf->expand = EXPAND_DEFAULT;
rf->desc = NULL;
rf->desclen = 0;
rf->ro = ro;
error = rcsparse(rf, path, ro);
if (error) {
rcsfile_free(rf);
return (NULL);
}
return (rf);
}
/*
* Write content of rcsfile to server. Assumes we have a complete RCS file
* loaded.
*/
int
rcsfile_send_details(struct rcsfile *rf, struct stream *wr)
{
struct delta *d;
struct tag *t;
const char *expand;
int error;
assert(rf != NULL);
error = proto_printf(wr, "V %s\n", rf->name);
if (error)
return (error);
/* Write default branch. */
if (rf->branch == NULL)
error = proto_printf(wr, "b\n");
else
error = proto_printf(wr, "B %s\n", rf->branch);
if (error)
return (error);
/* Write expand. */
expand = keyword_encode_expand(rf->expand);
assert(expand != NULL);
error = proto_printf(wr, "E %s\n", expand);
if (error)
return (error);
/* Write tags to server. */
error = proto_printf(wr, "T\n");
if (error)
return (error);
STAILQ_FOREACH(t, &rf->taglist, tag_next) {
error = proto_printf(wr, "%s %s\n", t->tag, t->revnum);
if (error)
return (error);
}
error = proto_printf(wr, ".\n");
if (error)
return (error);
/* Write deltas to server. */
error = proto_printf(wr, "D\n");
if (error)
return (error);
LIST_FOREACH(d, &rf->deltatable, table_next) {
error = proto_printf(wr, "%s %s\n", d->revnum, d->revdate);
if (error)
return (error);
}
error = proto_printf(wr, ".\n");
if (error)
return (error);
error = proto_printf(wr, ".\n");
return (error);
}
/*
* Write a RCS file to disk represented by the destination stream. Keep track of
* deltas with a stack and an inverted stack.
*/
int
rcsfile_write(struct rcsfile *rf, struct stream *dest)
{
STAILQ_HEAD(, delta) deltastack;
STAILQ_HEAD(, delta) deltalist_inverted;
struct tag *t;
struct branch *b;
struct delta *d, *d_tmp, *d_next;
int error;
/* First write head. */
d = LIST_FIRST(&rf->trunk->deltalist);
if (stream_printf(dest, "head%s%s;\n", head_space, d->revnum) < 0)
return (-1);
/* Write branch, if we have. */
if (rf->branch != NULL) {
if (stream_printf(dest, "branch%s%s;\n", branch_space,
rf->branch) < 0)
return (-1);
}
/* Write access. */
if (stream_printf(dest, "access") < 0)
return (-1);
#if 0
if (!STAILQ_EMPTY(&rf->accesslist)) {
/*
* XXX: Write out access. This doesn't seem to be necessary for
* the time being.
*/
}
#endif
if (stream_printf(dest, ";\n") < 0)
return (-1);
/* Write out taglist. */
if (stream_printf(dest, "symbols") < 0)
return (-1);
if (!STAILQ_EMPTY(&rf->taglist)) {
STAILQ_FOREACH(t, &rf->taglist, tag_next) {
if (stream_printf(dest, "\n%s%s:%s", tag_space, t->tag,
t->revnum) < 0)
return (-1);
}
}
/* Write out locks and strict. */
if (stream_printf(dest, ";\nlocks;") < 0)
return (-1);
if (rf->strictlock) {
if (stream_printf(dest, " strict;") < 0)
return (-1);
}
if (stream_printf(dest, "\n") < 0)
return (-1);
/* Write out the comment. */
if (rf->comment != NULL) {
if (stream_printf(dest, "comment%s@", comment_space) < 0 ||
stream_write(dest, rf->comment, rf->commentlen) < 0 ||
stream_printf(dest, "@;\n") < 0)
return (-1);
}
if (rf->expand != EXPAND_DEFAULT) {
if (stream_printf(dest, "expand%s@%s@;\n", expand_space,
keyword_encode_expand(rf->expand)) < 0)
return (-1);
}
if (stream_printf(dest, "\n\n") < 0)
return (-1);
/*
* Write out deltas. We use a stack where we push the appropriate deltas
* that is to be written out during the loop.
*/
STAILQ_INIT(&deltastack);
d = LIST_FIRST(&rf->trunk->deltalist);
STAILQ_INSERT_HEAD(&deltastack, d, stack_next);
while (!STAILQ_EMPTY(&deltastack)) {
d = STAILQ_FIRST(&deltastack);
STAILQ_REMOVE_HEAD(&deltastack, stack_next);
/* Do not write out placeholders just to be safe. */
if (d->placeholder)
continue;
if (stream_printf(dest, "%s\n", d->revnum) < 0)
return (-1);
if (stream_printf(dest, "date%s%s;%sauthor %s;%sstate",
date_space, d->revdate, auth_space, d->author,
state_space) < 0)
return (-1);
if (d->state != NULL) {
if (stream_printf(dest, " %s", d->state) < 0)
return (-1);
}
if (stream_printf(dest, ";\nbranches") < 0)
return (-1);
/*
* Write out our branches. Add them to a reversed list for use
* later when we write out the text.
*/
STAILQ_INIT(&deltalist_inverted);
LIST_FOREACH(b, &d->branchlist, branch_next) {
d_tmp = LIST_FIRST(&b->deltalist);
if (d_tmp == NULL)
continue;
STAILQ_INSERT_HEAD(&deltalist_inverted, d_tmp,
delta_prev);
STAILQ_INSERT_HEAD(&deltastack, d_tmp, stack_next);
}
/* Push branch heads on stack. */
STAILQ_FOREACH(d_tmp, &deltalist_inverted, delta_prev) {
if (d_tmp == NULL) {
lprintf(2, "Empty branch!\n");
return (-1);
}
if (stream_printf(dest, "\n%s%s", branches_space,
d_tmp->revnum) < 0)
return (-1);
}
if (stream_printf(dest, ";\nnext%s", next_space) < 0)
return (-1);
/* Push next delta on stack. */
d_next = LIST_NEXT(d, delta_next);
if (d_next != NULL) {
if (stream_printf(dest, "%s", d_next->revnum) < 0)
return (-1);
STAILQ_INSERT_HEAD(&deltastack, d_next, stack_next);
}
if (stream_printf(dest, ";\n\n") < 0)
return (-1);
}
/* Write out desc. */
if (stream_printf(dest, "\ndesc\n@") < 0 ||
stream_write(dest, rf->desc, rf->desclen) < 0 ||
stream_printf(dest, "@") < 0)
return (-1);
/* Write out deltatexts. */
error = rcsfile_write_deltatext(rf, dest);
if (stream_printf(dest, "\n") < 0)
return (-1);
return (error);
}
/*
* Write out deltatexts of a delta and it's subbranches recursively.
*/
int
rcsfile_write_deltatext(struct rcsfile *rf, struct stream *dest)
{
STAILQ_HEAD(, delta) deltastack;
LIST_HEAD(, delta) branchlist_datesorted;
struct delta *d, *d_tmp, *d_next, *d_tmp2, *d_tmp3;
struct stream *in;
struct branch *b;
size_t size;
char *line;
int error;
error = 0;
STAILQ_INIT(&deltastack);
d = LIST_FIRST(&rf->trunk->deltalist);
d->prev = NULL;
STAILQ_INSERT_HEAD(&deltastack, d, stack_next);
while (!STAILQ_EMPTY(&deltastack)) {
d = STAILQ_FIRST(&deltastack);
STAILQ_REMOVE_HEAD(&deltastack, stack_next);
/* Do not write out placeholders just to be safe. */
if (d->placeholder)
return (0);
if (stream_printf(dest, "\n\n\n%s\n", d->revnum) < 0)
return (-1);
if (stream_printf(dest, "log\n@") < 0)
return (-1);
in = stream_open_buf(d->log);
line = stream_getln(in, &size);
while (line != NULL) {
if (stream_write(dest, line, size) == -1)
return (-1);
line = stream_getln(in, &size);
}
stream_close(in);
if (stream_printf(dest, "@\ntext\n@") < 0)
return (-1);
error = rcsfile_puttext(rf, dest, d, d->prev);
if (error)
return (error);
if (stream_printf(dest, "@") < 0)
return (-1);
LIST_INIT(&branchlist_datesorted);
d_next = LIST_NEXT(d, delta_next);
if (d_next != NULL) {
d_next->prev = d;
/*
* If it's trunk, treat it like the oldest, if not treat
* it like a child.
*/
if (rcsrev_istrunk(d_next->revnum))
STAILQ_INSERT_HEAD(&deltastack, d_next,
stack_next);
else
LIST_INSERT_HEAD(&branchlist_datesorted, d_next,
branch_next_date);
}
/*
* First, we need to sort our branches based on their date to
* take into account some self-hacked RCS files.
*/
LIST_FOREACH(b, &d->branchlist, branch_next) {
d_tmp = LIST_FIRST(&b->deltalist);
if (d_tmp == NULL)
break;
if (LIST_EMPTY(&branchlist_datesorted)) {
LIST_INSERT_HEAD(&branchlist_datesorted, d_tmp,
branch_next_date);
continue;
}
d_tmp2 = LIST_FIRST(&branchlist_datesorted);
if (rcsnum_cmp(d_tmp->revdate, d_tmp2->revdate) <= 0) {
LIST_INSERT_BEFORE(d_tmp2, d_tmp,
branch_next_date);
continue;
}
while ((d_tmp3 = LIST_NEXT(d_tmp2, branch_next_date))
!= NULL) {
if (rcsnum_cmp(d_tmp->revdate, d_tmp3->revdate)
<= 0)
break;
d_tmp2 = d_tmp3;
}
LIST_INSERT_AFTER(d_tmp2, d_tmp, branch_next_date);
}
/*
* Invert the deltalist of a branch, since we're writing them
* the opposite way.
*/
LIST_FOREACH(d_tmp, &branchlist_datesorted, branch_next_date) {
d_tmp->prev = d;
STAILQ_INSERT_HEAD(&deltastack, d_tmp, stack_next);
}
}
return (0);
}
/*
* Generates text given a delta and a diffbase.
*/
static int
rcsfile_puttext(struct rcsfile *rf, struct stream *dest, struct delta *d,
struct delta *diffbase)
{
struct stream *in, *rd, *orig;
struct keyword *k;
struct diffinfo dibuf, *di;
struct buf *b;
size_t size;
char *line;
int error;
di = &dibuf;
b = NULL;
error = 0;
/* Write if the diffbase is the previous */
if (d->diffbase == diffbase) {
/* Write out the text. */
in = stream_open_buf(d->text);
line = stream_getln(in, &size);
while (line != NULL) {
if (stream_write(dest, line, size) == -1) {
error = -1;
goto cleanup;
}
line = stream_getln(in, &size);
}
stream_close(in);
/* We need to apply diff to produce text, this is probably HEAD. */
} else if (diffbase == NULL) {
/* Apply diff. */
orig = rcsfile_getdeltatext(rf, d, &b);
if (orig == NULL) {
error = -1;
goto cleanup;
}
line = stream_getln(orig, &size);
while (line != NULL) {
if (stream_write(dest, line, size) == -1) {
error = -1;
goto cleanup;
}
line = stream_getln(orig, &size);
}
stream_close(orig);
/*
* A new head was probably added, and now the previous HEAD must be
* changed to include the diff instead.
*/
} else if (diffbase->diffbase == d) {
/* Get reverse diff. */
orig = rcsfile_getdeltatext(rf, d, &b);
if (orig == NULL) {
error = -1;
goto cleanup;
}
di->di_rcsfile = rf->name;
di->di_cvsroot = rf->cvsroot;
di->di_revnum = d->revnum;
di->di_revdate = d->revdate;
di->di_author = d->author;
di->di_tag = rf->colltag;
di->di_state = d->state;
di->di_expand = EXPAND_OLD;
k = keyword_new();
rd = stream_open_buf(diffbase->text);
error = diff_reverse(rd, orig, dest, k, di);
if (error) {
lprintf(-1, "Error applying reverse diff: %d\n", error);
goto cleanup;
}
keyword_free(k);
stream_close(rd);
stream_close(orig);
}
cleanup:
if (b != NULL)
buf_free(b);
return (error);
}
/*
* Return a stream with an applied diff of a delta.
* XXX: extra overhead on the last apply. Could write directly to file, but
* makes things complicated though.
*/
static struct stream *
rcsfile_getdeltatext(struct rcsfile *rf, struct delta *d, struct buf **buf_dest)
{
struct diffinfo dibuf, *di;
struct stream *orig, *dest, *rd;
struct buf *buf_orig;
struct keyword *k;
int error;
buf_orig = NULL;
error = 0;
/*
* If diffbase is NULL or we are head (the old head), we have a normal
* complete deltatext.
*/
if (d->diffbase == NULL && !strcmp(rf->head, d->revnum)) {
orig = stream_open_buf(d->text);
return (orig);
}
di = &dibuf;
/* If not, we need to apply our diff to that of our diffbase. */
orig = rcsfile_getdeltatext(rf, d->diffbase, &buf_orig);
if (orig == NULL)
return (NULL);
/*
* Now that we are sure we have a complete deltatext in ret, let's apply
* our diff to it.
*/
*buf_dest = buf_new(BUF_SIZE_DEFAULT);
dest = stream_open_buf(*buf_dest);
di->di_rcsfile = rf->name;
di->di_cvsroot = rf->cvsroot;
di->di_revnum = d->revnum;
di->di_revdate = d->revdate;
di->di_author = d->author;
di->di_tag = rf->colltag;
di->di_state = d->state;
di->di_expand = EXPAND_OLD;
rd = stream_open_buf(d->text);
k = keyword_new();
error = diff_apply(rd, orig, dest, k, di, 0);
stream_flush(dest);
stream_close(rd);
stream_close(orig);
stream_close(dest);
keyword_free(k);
if (buf_orig != NULL)
buf_free(buf_orig);
if (error) {
lprintf(-1, "Error applying diff: %d\n", error);
return (NULL);
}
/* Now reopen the stream for the reading. */
dest = stream_open_buf(*buf_dest);
return (dest);
}
/* Print content of rcsfile. Useful for debugging. */
void
rcsfile_print(struct rcsfile *rf)
{
struct delta *d;
struct tag *t;
struct string *s;
struct stream *in;
char *line;
lprintf(1, "\n");
if (rf->name != NULL)
lprintf(1, "name: '%s'\n", rf->name);
if (rf->head != NULL)
lprintf(1, "head: '%s'\n", rf->head);
if (rf->branch != NULL)
lprintf(1, "branch: '%s'\n", rf->branch);
lprintf(1, "Access: ");
STAILQ_FOREACH(s, &rf->accesslist, string_next)
lprintf(1, "'%s' ", s->str);
lprintf(1, "\n");
/* Print all tags. */
STAILQ_FOREACH(t, &rf->taglist, tag_next) {
lprintf(1, "Tag: ");
if (t->tag != NULL)
lprintf(1, "name: %s ", t->tag);
if (t->revnum != NULL)
lprintf(1, "rev: %s", t->revnum);
lprintf(1, "\n");
}
if (rf->strictlock)
lprintf(1, "Strict!\n");
if (rf->comment != NULL)
lprintf(1, "comment: '%s'\n", rf->comment);
if (rf->expand != EXPAND_DEFAULT)
lprintf(1, "expand: '%s'\n", keyword_encode_expand(rf->expand));
/* Print all deltas. */
LIST_FOREACH(d, &rf->deltatable, table_next) {
lprintf(1, "Delta: ");
if (d->revdate != NULL)
lprintf(1, "date: %s ", d->revdate);
if (d->revnum != NULL)
lprintf(1, "rev: %s", d->revnum);
if (d->author != NULL)
lprintf(1, "author: %s", d->author);
if (d->state != NULL)
lprintf(1, "state: %s", d->state);
lprintf(1, "Text:\n");
in = stream_open_buf(d->text);
line = stream_getln(in, NULL);
while (line != NULL) {
lprintf(1, "TEXT: %s\n", line);
line = stream_getln(in, NULL);
}
stream_close(in);
lprintf(1, "\n");
}
if (rf->desc != NULL)
lprintf(1, "desc: '%s'\n", rf->desc);
}
/* Free all memory associated with a struct rcsfile. */
void
rcsfile_free(struct rcsfile *rf)
{
struct delta *d;
struct tag *t;
struct string *s;
if (rf->name != NULL)
free(rf->name);
if (rf->head != NULL)
free(rf->head);
if (rf->branch != NULL)
free(rf->branch);
if (rf->cvsroot != NULL)
free(rf->cvsroot);
if (rf->colltag != NULL)
free(rf->colltag);
/* Free all access ids. */
while (!STAILQ_EMPTY(&rf->accesslist)) {
s = STAILQ_FIRST(&rf->accesslist);
STAILQ_REMOVE_HEAD(&rf->accesslist, string_next);
if (s->str != NULL)
free(s->str);
free(s);
}
/* Free all tags. */
while (!STAILQ_EMPTY(&rf->taglist)) {
t = STAILQ_FIRST(&rf->taglist);
STAILQ_REMOVE_HEAD(&rf->taglist, tag_next);
if (t->tag != NULL)
free(t->tag);
if (t->revnum != NULL)
free(t->revnum);
free(t);
}
if (rf->comment != NULL)
free(rf->comment);
/* Free all deltas in global list */
while (!LIST_EMPTY(&rf->deltatable)) {
d = LIST_FIRST(&rf->deltatable);
if (!rf->ro)
LIST_REMOVE(d, delta_next);
LIST_REMOVE(d, table_next);
rcsfile_freedelta(d);
}
/* Free global branch. */
if (rf->trunk->revnum != NULL)
free(rf->trunk->revnum);
free(rf->trunk);
if (rf->desc != NULL)
free(rf->desc);
free(rf);
}
/*
* Free a RCS delta.
*/
static void
rcsfile_freedelta(struct delta *d)
{
struct branch *b;
if (d->revdate != NULL)
free(d->revdate);
if (d->revnum != NULL)
free(d->revnum);
if (d->author != NULL)
free(d->author);
if (d->state != NULL)
free(d->state);
if (d->log != NULL)
buf_free(d->log);
if (d->text != NULL)
buf_free(d->text);
/* Free all subbranches of a delta. */
while (!LIST_EMPTY(&d->branchlist)) {
b = LIST_FIRST(&d->branchlist);
LIST_REMOVE(b, branch_next);
free(b->revnum);
free(b);
}
free(d);
}
/*
* Functions for editing RCS deltas.
*/
/* Add a new entry to the access list. */
void
rcsfile_addaccess(struct rcsfile *rf, char *id)
{
struct string *s;
s = xmalloc(sizeof(struct string));
s->str = id;
STAILQ_INSERT_TAIL(&rf->accesslist, s, string_next);
}
/* Add a tag to a RCS file. */
void
rcsfile_addtag(struct rcsfile *rf, char *tag, char *revnum)
{
struct tag *t;
t = xmalloc(sizeof(struct tag));
t->tag = xstrdup(tag);
t->revnum = xstrdup(revnum);
STAILQ_INSERT_HEAD(&rf->taglist, t, tag_next);
}
/* Import a tag to a RCS file. */
void
rcsfile_importtag(struct rcsfile *rf, char *tag, char *revnum)
{
struct tag *t;
t = xmalloc(sizeof(struct tag));
t->tag = tag;
t->revnum = revnum;
STAILQ_INSERT_TAIL(&rf->taglist, t, tag_next);
}
/*
* Delete a revision from the global delta list and the branch it is in. Csup
* will tell us to delete the tags involved.
*/
void
rcsfile_deleterev(struct rcsfile *rf, char *revname)
{
struct delta *d;
d = rcsfile_getdelta(rf, revname);
if (!rf->ro)
LIST_REMOVE(d, delta_next);
LIST_REMOVE(d, table_next);
rcsfile_freedelta(d);
}
/* Delete a tag from the tag list. */
void
rcsfile_deletetag(struct rcsfile *rf, char *tag, char *revnum)
{
struct tag *t;
STAILQ_FOREACH(t, &rf->taglist, tag_next) {
if ((strcmp(tag, t->tag) == 0) &&
(strcmp(revnum, t->revnum) == 0)) {
STAILQ_REMOVE(&rf->taglist, t, tag, tag_next);
free(t->tag);
free(t->revnum);
free(t);
return;
}
}
}
/*
* Searches the global deltalist for a delta.
*/
struct delta *
rcsfile_getdelta(struct rcsfile *rf, char *revnum)
{
struct delta *d;
LIST_FOREACH(d, &rf->deltatable, table_next) {
if (strcmp(revnum, d->revnum) == 0)
return (d);
}
return (NULL);
}
/* Set rcsfile head. */
void
rcsfile_setval(struct rcsfile *rf, int field, char *val, size_t len)
{
switch (field) {
case RCSFILE_HEAD:
if (rf->head != NULL)
free(rf->head);
rf->head = val;
break;
case RCSFILE_BRANCH:
if (rf->branch != NULL)
free(rf->branch);
rf->branch = val;
break;
case RCSFILE_COMMENT:
if (rf->comment != NULL)
free(rf->comment);
rf->comment = val;
rf->commentlen = len;
break;
case RCSFILE_DESC:
if (rf->desc != NULL)
free(rf->desc);
rf->desc = val;
rf->desclen = len;
break;
default:
lprintf(-1, "Setting invalid RCSfile value.\n");
break;
}
}
void
rcsfile_setexpand(struct rcsfile *rf, int expand)
{
rf->expand = expand;
}
void
rcsfile_setstrict(struct rcsfile *rf)
{
rf->strictlock = 1;
}
/* Create and initialize a delta. */
static struct delta *
rcsfile_createdelta(char *revnum)
{
struct delta *d;
d = xmalloc(sizeof(struct delta));
d->revnum = xstrdup(revnum);
d->revdate = NULL;
d->state = NULL;
d->author = NULL;
d->log = buf_new(BUF_SIZE_DEFAULT);