File: [local] / src / usr.bin / rcs / rcs.c (download)
Revision 1.1, Wed Apr 26 02:55:13 2006 UTC (18 years, 1 month ago) by joris
Branch: MAIN
fork our code we shared between openrcs/cvs into the openrcs dir.
this was starting to become inhuman to maintain without
ugly ugly hacks in the shared code, and it will be easier
to make specific changes for openrcs without touching the
soon-to-be-replaced opencvs code.
|
/* $OpenBSD: rcs.c,v 1.1 2006/04/26 02:55:13 joris Exp $ */
/*
* Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 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 "includes.h"
#include "diff.h"
#include "util.h"
#include "rcs.h"
#include "rcsprog.h"
#include "xmalloc.h"
#define RCS_BUFSIZE 16384
#define RCS_BUFEXTSIZE 8192
#define RCS_KWEXP_SIZE 1024
/* RCS token types */
#define RCS_TOK_ERR -1
#define RCS_TOK_EOF 0
#define RCS_TOK_NUM 1
#define RCS_TOK_ID 2
#define RCS_TOK_STRING 3
#define RCS_TOK_SCOLON 4
#define RCS_TOK_COLON 5
#define RCS_TOK_HEAD 8
#define RCS_TOK_BRANCH 9
#define RCS_TOK_ACCESS 10
#define RCS_TOK_SYMBOLS 11
#define RCS_TOK_LOCKS 12
#define RCS_TOK_COMMENT 13
#define RCS_TOK_EXPAND 14
#define RCS_TOK_DATE 15
#define RCS_TOK_AUTHOR 16
#define RCS_TOK_STATE 17
#define RCS_TOK_NEXT 18
#define RCS_TOK_BRANCHES 19
#define RCS_TOK_DESC 20
#define RCS_TOK_LOG 21
#define RCS_TOK_TEXT 22
#define RCS_TOK_STRICT 23
#define RCS_ISKEY(t) (((t) >= RCS_TOK_HEAD) && ((t) <= RCS_TOK_BRANCHES))
#define RCS_NOSCOL 0x01 /* no terminating semi-colon */
#define RCS_VOPT 0x02 /* value is optional */
/* opaque parse data */
struct rcs_pdata {
u_int rp_lines;
char *rp_buf;
size_t rp_blen;
char *rp_bufend;
size_t rp_tlen;
/* pushback token buffer */
char rp_ptok[128];
int rp_pttype; /* token type, RCS_TOK_ERR if no token */
FILE *rp_file;
};
#define RCS_TOKSTR(rfp) ((struct rcs_pdata *)rfp->rf_pdata)->rp_buf
#define RCS_TOKLEN(rfp) ((struct rcs_pdata *)rfp->rf_pdata)->rp_tlen
/* invalid characters in RCS symbol names */
static const char rcs_sym_invch[] = RCS_SYM_INVALCHAR;
/* comment leaders, depending on the file's suffix */
static const struct rcs_comment {
const char *rc_suffix;
const char *rc_cstr;
} rcs_comments[] = {
{ "1", ".\\\" " },
{ "2", ".\\\" " },
{ "3", ".\\\" " },
{ "4", ".\\\" " },
{ "5", ".\\\" " },
{ "6", ".\\\" " },
{ "7", ".\\\" " },
{ "8", ".\\\" " },
{ "9", ".\\\" " },
{ "a", "-- " }, /* Ada */
{ "ada", "-- " },
{ "adb", "-- " },
{ "asm", ";; " }, /* assembler (MS-DOS) */
{ "ads", "-- " }, /* Ada */
{ "bat", ":: " }, /* batch (MS-DOS) */
{ "body", "-- " }, /* Ada */
{ "c", " * " }, /* C */
{ "c++", "// " }, /* C++ */
{ "cc", "// " },
{ "cpp", "// " },
{ "cxx", "// " },
{ "m", "// " }, /* Objective-C */
{ "cl", ";;; " }, /* Common Lisp */
{ "cmd", ":: " }, /* command (OS/2) */
{ "cmf", "c " }, /* CM Fortran */
{ "csh", "# " }, /* shell */
{ "e", "# " }, /* efl */
{ "epsf", "% " }, /* encapsulated postscript */
{ "epsi", "% " }, /* encapsulated postscript */
{ "el", "; " }, /* Emacs Lisp */
{ "f", "c " }, /* Fortran */
{ "for", "c " },
{ "h", " * " }, /* C-header */
{ "hh", "// " }, /* C++ header */
{ "hpp", "// " },
{ "hxx", "// " },
{ "in", "# " }, /* for Makefile.in */
{ "l", " * " }, /* lex */
{ "mac", ";; " }, /* macro (DEC-10, MS-DOS, PDP-11, VMS, etc) */
{ "mak", "# " }, /* makefile, e.g. Visual C++ */
{ "me", ".\\\" " }, /* me-macros t/nroff */
{ "ml", "; " }, /* mocklisp */
{ "mm", ".\\\" " }, /* mm-macros t/nroff */
{ "ms", ".\\\" " }, /* ms-macros t/nroff */
{ "man", ".\\\" " }, /* man-macros t/nroff */
{ "p", " * " }, /* pascal */
{ "pas", " * " },
{ "pl", "# " }, /* Perl (conflict with Prolog) */
{ "pm", "# " }, /* Perl module */
{ "ps", "% " }, /* postscript */
{ "psw", "% " }, /* postscript wrap */
{ "pswm", "% " }, /* postscript wrap */
{ "r", "# " }, /* ratfor */
{ "rc", " * " }, /* Microsoft Windows resource file */
{ "red", "% " }, /* psl/rlisp */
{ "sh", "# " }, /* shell */
{ "sl", "% " }, /* psl */
{ "spec", "-- " }, /* Ada */
{ "tex", "% " }, /* tex */
{ "y", " * " }, /* yacc */
{ "ye", " * " }, /* yacc-efl */
{ "yr", " * " }, /* yacc-ratfor */
};
struct rcs_kw rcs_expkw[] = {
{ "Author", RCS_KW_AUTHOR },
{ "Date", RCS_KW_DATE },
{ "Header", RCS_KW_HEADER },
{ "Id", RCS_KW_ID },
{ "Log", RCS_KW_LOG },
{ "Name", RCS_KW_NAME },
{ "RCSfile", RCS_KW_RCSFILE },
{ "Revision", RCS_KW_REVISION },
{ "Source", RCS_KW_SOURCE },
{ "State", RCS_KW_STATE },
};
#define NB_COMTYPES (sizeof(rcs_comments)/sizeof(rcs_comments[0]))
static struct rcs_key {
char rk_str[16];
int rk_id;
int rk_val;
int rk_flags;
} rcs_keys[] = {
{ "access", RCS_TOK_ACCESS, RCS_TOK_ID, RCS_VOPT },
{ "author", RCS_TOK_AUTHOR, RCS_TOK_ID, 0 },
{ "branch", RCS_TOK_BRANCH, RCS_TOK_NUM, RCS_VOPT },
{ "branches", RCS_TOK_BRANCHES, RCS_TOK_NUM, RCS_VOPT },
{ "comment", RCS_TOK_COMMENT, RCS_TOK_STRING, RCS_VOPT },
{ "date", RCS_TOK_DATE, RCS_TOK_NUM, 0 },
{ "desc", RCS_TOK_DESC, RCS_TOK_STRING, RCS_NOSCOL },
{ "expand", RCS_TOK_EXPAND, RCS_TOK_STRING, RCS_VOPT },
{ "head", RCS_TOK_HEAD, RCS_TOK_NUM, RCS_VOPT },
{ "locks", RCS_TOK_LOCKS, RCS_TOK_ID, 0 },
{ "log", RCS_TOK_LOG, RCS_TOK_STRING, RCS_NOSCOL },
{ "next", RCS_TOK_NEXT, RCS_TOK_NUM, RCS_VOPT },
{ "state", RCS_TOK_STATE, RCS_TOK_ID, RCS_VOPT },
{ "strict", RCS_TOK_STRICT, 0, 0, },
{ "symbols", RCS_TOK_SYMBOLS, 0, 0 },
{ "text", RCS_TOK_TEXT, RCS_TOK_STRING, RCS_NOSCOL },
};
#define RCS_NKEYS (sizeof(rcs_keys)/sizeof(rcs_keys[0]))
static const char *rcs_errstrs[] = {
"No error",
"No such entry",
"Duplicate entry found",
"Bad RCS number",
"Invalid RCS symbol",
"Parse error",
};
#define RCS_NERR (sizeof(rcs_errstrs)/sizeof(rcs_errstrs[0]))
int rcs_errno = RCS_ERR_NOERR;
char *timezone_flag = NULL;
int rcs_patch_lines(struct rcs_lines *, struct rcs_lines *);
static void rcs_parse_init(RCSFILE *);
static int rcs_parse_admin(RCSFILE *);
static int rcs_parse_delta(RCSFILE *);
static void rcs_parse_deltas(RCSFILE *, RCSNUM *);
static int rcs_parse_deltatext(RCSFILE *);
static void rcs_parse_deltatexts(RCSFILE *, RCSNUM *);
static void rcs_parse_desc(RCSFILE *, RCSNUM *);
static int rcs_parse_access(RCSFILE *);
static int rcs_parse_symbols(RCSFILE *);
static int rcs_parse_locks(RCSFILE *);
static int rcs_parse_branches(RCSFILE *, struct rcs_delta *);
static void rcs_freedelta(struct rcs_delta *);
static void rcs_freepdata(struct rcs_pdata *);
static int rcs_gettok(RCSFILE *);
static int rcs_pushtok(RCSFILE *, const char *, int);
static void rcs_growbuf(RCSFILE *);
static void rcs_strprint(const u_char *, size_t, FILE *);
static char* rcs_expand_keywords(char *, struct rcs_delta *, char *,
size_t, int);
/*
* rcs_open()
*
* Open a file containing RCS-formatted information. The file's path is
* given in <path>, and the opening flags are given in <flags>, which is either
* RCS_READ, RCS_WRITE, or RCS_RDWR. If the open requests write access and
* the file does not exist, the RCS_CREATE flag must also be given, in which
* case it will be created with the mode specified in a third argument of
* type mode_t. If the file exists and RCS_CREATE is passed, the open will
* fail.
* Returns a handle to the opened file on success, or NULL on failure.
*/
RCSFILE *
rcs_open(const char *path, int flags, ...)
{
int ret, mode;
mode_t fmode;
RCSFILE *rfp;
struct stat st;
va_list vap;
struct rcs_delta *rdp;
struct rcs_lock *lkr;
fmode = S_IRUSR|S_IRGRP|S_IROTH;
flags &= 0xffff; /* ditch any internal flags */
if (((ret = stat(path, &st)) == -1) && errno == ENOENT) {
if (flags & RCS_CREATE) {
va_start(vap, flags);
mode = va_arg(vap, int);
va_end(vap);
fmode = (mode_t)mode;
} else {
rcs_errno = RCS_ERR_NOENT;
return (NULL);
}
} else if (ret == 0 && (flags & RCS_CREATE)) {
warnx("RCS file `%s' exists", path);
return (NULL);
}
rfp = xcalloc(1, sizeof(*rfp));
rfp->rf_path = xstrdup(path);
rfp->rf_flags = flags | RCS_SLOCK | RCS_SYNCED;
rfp->rf_mode = fmode;
TAILQ_INIT(&(rfp->rf_delta));
TAILQ_INIT(&(rfp->rf_access));
TAILQ_INIT(&(rfp->rf_symbols));
TAILQ_INIT(&(rfp->rf_locks));
if (!(rfp->rf_flags & RCS_CREATE))
rcs_parse_init(rfp);
/* fill in rd_locker */
TAILQ_FOREACH(lkr, &(rfp->rf_locks), rl_list) {
if ((rdp = rcs_findrev(rfp, lkr->rl_num)) == NULL) {
rcs_close(rfp);
return (NULL);
}
rdp->rd_locker = xstrdup(lkr->rl_name);
}
return (rfp);
}
/*
* rcs_close()
*
* Close an RCS file handle.
*/
void
rcs_close(RCSFILE *rfp)
{
struct rcs_delta *rdp;
struct rcs_access *rap;
struct rcs_lock *rlp;
struct rcs_sym *rsp;
if ((rfp->rf_flags & RCS_WRITE) && !(rfp->rf_flags & RCS_SYNCED))
rcs_write(rfp);
while (!TAILQ_EMPTY(&(rfp->rf_delta))) {
rdp = TAILQ_FIRST(&(rfp->rf_delta));
TAILQ_REMOVE(&(rfp->rf_delta), rdp, rd_list);
rcs_freedelta(rdp);
}
while (!TAILQ_EMPTY(&(rfp->rf_access))) {
rap = TAILQ_FIRST(&(rfp->rf_access));
TAILQ_REMOVE(&(rfp->rf_access), rap, ra_list);
xfree(rap->ra_name);
xfree(rap);
}
while (!TAILQ_EMPTY(&(rfp->rf_symbols))) {
rsp = TAILQ_FIRST(&(rfp->rf_symbols));
TAILQ_REMOVE(&(rfp->rf_symbols), rsp, rs_list);
rcsnum_free(rsp->rs_num);
xfree(rsp->rs_name);
xfree(rsp);
}
while (!TAILQ_EMPTY(&(rfp->rf_locks))) {
rlp = TAILQ_FIRST(&(rfp->rf_locks));
TAILQ_REMOVE(&(rfp->rf_locks), rlp, rl_list);
rcsnum_free(rlp->rl_num);
xfree(rlp->rl_name);
xfree(rlp);
}
if (rfp->rf_head != NULL)
rcsnum_free(rfp->rf_head);
if (rfp->rf_branch != NULL)
rcsnum_free(rfp->rf_branch);
if (rfp->rf_path != NULL)
xfree(rfp->rf_path);
if (rfp->rf_comment != NULL)
xfree(rfp->rf_comment);
if (rfp->rf_expand != NULL)
xfree(rfp->rf_expand);
if (rfp->rf_desc != NULL)
xfree(rfp->rf_desc);
if (rfp->rf_pdata != NULL)
rcs_freepdata(rfp->rf_pdata);
xfree(rfp);
}
/*
* rcs_write()
*
* Write the contents of the RCS file handle <rfp> to disk in the file whose
* path is in <rf_path>.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_write(RCSFILE *rfp)
{
FILE *fp;
char buf[1024], numbuf[64], fn[19] = "";
void *bp;
struct rcs_access *ap;
struct rcs_sym *symp;
struct rcs_branch *brp;
struct rcs_delta *rdp;
struct rcs_lock *lkp;
ssize_t nread, nwritten;
size_t len;
int fd, from_fd, to_fd;
from_fd = to_fd = fd = -1;
if (rfp->rf_flags & RCS_SYNCED)
return (0);
/* Write operations need the whole file parsed */
rcs_parse_deltatexts(rfp, NULL);
strlcpy(fn, "/tmp/rcs.XXXXXXXXXX", sizeof(fn));
if ((fd = mkstemp(fn)) == -1)
err(1, "mkstemp: `%s'", fn);
if ((fp = fdopen(fd, "w+")) == NULL) {
fd = errno;
unlink(fn);
err(1, "fdopen: %s", fn);
}
if (rfp->rf_head != NULL)
rcsnum_tostr(rfp->rf_head, numbuf, sizeof(numbuf));
else
numbuf[0] = '\0';
fprintf(fp, "head\t%s;\n", numbuf);
if (rfp->rf_branch != NULL) {
rcsnum_tostr(rfp->rf_branch, numbuf, sizeof(numbuf));
fprintf(fp, "branch\t%s;\n", numbuf);
}
fputs("access", fp);
TAILQ_FOREACH(ap, &(rfp->rf_access), ra_list) {
fprintf(fp, "\n\t%s", ap->ra_name);
}
fputs(";\n", fp);
fprintf(fp, "symbols");
TAILQ_FOREACH(symp, &(rfp->rf_symbols), rs_list) {
rcsnum_tostr(symp->rs_num, numbuf, sizeof(numbuf));
strlcpy(buf, symp->rs_name, sizeof(buf));
strlcat(buf, ":", sizeof(buf));
strlcat(buf, numbuf, sizeof(buf));
fprintf(fp, "\n\t%s", buf);
}
fprintf(fp, ";\n");
fprintf(fp, "locks");
TAILQ_FOREACH(lkp, &(rfp->rf_locks), rl_list) {
rcsnum_tostr(lkp->rl_num, numbuf, sizeof(numbuf));
fprintf(fp, "\n\t%s:%s", lkp->rl_name, numbuf);
}
fprintf(fp, ";");
if (rfp->rf_flags & RCS_SLOCK)
fprintf(fp, " strict;");
fputc('\n', fp);
fputs("comment\t@", fp);
if (rfp->rf_comment != NULL) {
rcs_strprint((const u_char *)rfp->rf_comment,
strlen(rfp->rf_comment), fp);
fputs("@;\n", fp);
} else
fputs("# @;\n", fp);
if (rfp->rf_expand != NULL) {
fputs("expand @", fp);
rcs_strprint((const u_char *)rfp->rf_expand,
strlen(rfp->rf_expand), fp);
fputs("@;\n", fp);
}
fputs("\n\n", fp);
TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) {
fprintf(fp, "%s\n", rcsnum_tostr(rdp->rd_num, numbuf,
sizeof(numbuf)));
fprintf(fp, "date\t%d.%02d.%02d.%02d.%02d.%02d;",
rdp->rd_date.tm_year + 1900, rdp->rd_date.tm_mon + 1,
rdp->rd_date.tm_mday, rdp->rd_date.tm_hour,
rdp->rd_date.tm_min, rdp->rd_date.tm_sec);
fprintf(fp, "\tauthor %s;\tstate %s;\n",
rdp->rd_author, rdp->rd_state);
fputs("branches", fp);
TAILQ_FOREACH(brp, &(rdp->rd_branches), rb_list) {
fprintf(fp, " %s", rcsnum_tostr(brp->rb_num, numbuf,
sizeof(numbuf)));
}
fputs(";\n", fp);
fprintf(fp, "next\t%s;\n\n", rcsnum_tostr(rdp->rd_next,
numbuf, sizeof(numbuf)));
}
fputs("\ndesc\n@", fp);
if (rfp->rf_desc != NULL && (len = strlen(rfp->rf_desc)) > 0) {
rcs_strprint((const u_char *)rfp->rf_desc, len, fp);
if (rfp->rf_desc[len-1] != '\n')
fputc('\n', fp);
}
fputs("@\n", fp);
/* deltatexts */
TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) {
fprintf(fp, "\n\n%s\n", rcsnum_tostr(rdp->rd_num, numbuf,
sizeof(numbuf)));
fputs("log\n@", fp);
if (rdp->rd_log != NULL) {
len = strlen(rdp->rd_log);
rcs_strprint((const u_char *)rdp->rd_log, len, fp);
if (rdp->rd_log[len-1] != '\n')
fputc('\n', fp);
}
fputs("@\ntext\n@", fp);
if (rdp->rd_text != NULL) {
rcs_strprint(rdp->rd_text, rdp->rd_tlen, fp);
if (rdp->rd_tlen != 0) {
if (rdp->rd_text[rdp->rd_tlen-1] != '\n')
fputc('\n', fp);
}
}
fputs("@\n", fp);
}
fclose(fp);
/*
* We try to use rename() to atomically put the new file in place.
* If that fails, we try a copy.
*/
if (rename(fn, rfp->rf_path) == -1) {
if (errno == EXDEV) {
/* rename() not supported so we have to copy. */
if (chmod(rfp->rf_path, S_IWUSR) == -1 &&
!(rfp->rf_flags & RCS_CREATE)) {
errx(1, "chmod(%s, 0%o) failed",
rfp->rf_path, S_IWUSR);
}
if ((from_fd = open(fn, O_RDONLY)) == -1) {
warn("failed to open `%s'",
rfp->rf_path);
return (-1);
}
if ((to_fd = open(rfp->rf_path,
O_WRONLY|O_TRUNC|O_CREAT)) == -1) {
warn("failed to open `%s'", fn);
close(from_fd);
return (-1);
}
bp = xmalloc(MAXBSIZE);
for (;;) {
if ((nread = read(from_fd, bp, MAXBSIZE)) == 0)
break;
if (nread == -1)
goto err;
nwritten = write(to_fd, bp, (size_t)nread);
if (nwritten == -1 || nwritten != nread)
goto err;
}
if (nread < 0) {
err: if (unlink(rfp->rf_path) == -1)
warn("failed to unlink `%s'",
rfp->rf_path);
close(from_fd);
close(to_fd);
xfree(bp);
return (-1);
}
close(from_fd);
close(to_fd);
xfree(bp);
if (unlink(fn) == -1) {
warn("failed to unlink `%s'", fn);
return (-1);
}
} else {
warn("failed to access temp RCS output file");
return (-1);
}
}
if (chmod(rfp->rf_path, rfp->rf_mode) == -1) {
warn("failed to chmod `%s'", rfp->rf_path);
return (-1);
}
rfp->rf_flags |= RCS_SYNCED;
return (0);
}
/*
* rcs_head_get()
*
* Retrieve the revision number of the head revision for the RCS file <file>.
*/
const RCSNUM *
rcs_head_get(RCSFILE *file)
{
return (file->rf_head);
}
/*
* rcs_head_set()
*
* Set the revision number of the head revision for the RCS file <file> to
* <rev>, which must reference a valid revision within the file.
*/
int
rcs_head_set(RCSFILE *file, RCSNUM *rev)
{
if (rcs_findrev(file, rev) == NULL)
return (-1);
if (file->rf_head == NULL)
file->rf_head = rcsnum_alloc();
rcsnum_cpy(rev, file->rf_head, 0);
file->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_branch_get()
*
* Retrieve the default branch number for the RCS file <file>.
* Returns the number on success. If NULL is returned, then there is no
* default branch for this file.
*/
const RCSNUM *
rcs_branch_get(RCSFILE *file)
{
return (file->rf_branch);
}
/*
* rcs_branch_set()
*
* Set the default branch for the RCS file <file> to <bnum>.
* Returns 0 on success, -1 on failure.
*/
int
rcs_branch_set(RCSFILE *file, const RCSNUM *bnum)
{
if (file->rf_branch == NULL)
file->rf_branch = rcsnum_alloc();
rcsnum_cpy(bnum, file->rf_branch, 0);
file->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_access_add()
*
* Add the login name <login> to the access list for the RCS file <file>.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_access_add(RCSFILE *file, const char *login)
{
struct rcs_access *ap;
/* first look for duplication */
TAILQ_FOREACH(ap, &(file->rf_access), ra_list) {
if (strcmp(ap->ra_name, login) == 0) {
rcs_errno = RCS_ERR_DUPENT;
return (-1);
}
}
ap = xmalloc(sizeof(*ap));
ap->ra_name = xstrdup(login);
TAILQ_INSERT_TAIL(&(file->rf_access), ap, ra_list);
/* not synced anymore */
file->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_access_remove()
*
* Remove an entry with login name <login> from the access list of the RCS
* file <file>.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_access_remove(RCSFILE *file, const char *login)
{
struct rcs_access *ap;
TAILQ_FOREACH(ap, &(file->rf_access), ra_list)
if (strcmp(ap->ra_name, login) == 0)
break;
if (ap == NULL) {
rcs_errno = RCS_ERR_NOENT;
return (-1);
}
TAILQ_REMOVE(&(file->rf_access), ap, ra_list);
xfree(ap->ra_name);
xfree(ap);
/* not synced anymore */
file->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_sym_add()
*
* Add a symbol to the list of symbols for the RCS file <rfp>. The new symbol
* is named <sym> and is bound to the RCS revision <snum>.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_sym_add(RCSFILE *rfp, const char *sym, RCSNUM *snum)
{
struct rcs_sym *symp;
if (!rcs_sym_check(sym)) {
rcs_errno = RCS_ERR_BADSYM;
return (-1);
}
/* first look for duplication */
TAILQ_FOREACH(symp, &(rfp->rf_symbols), rs_list) {
if (strcmp(symp->rs_name, sym) == 0) {
rcs_errno = RCS_ERR_DUPENT;
return (-1);
}
}
symp = xmalloc(sizeof(*symp));
symp->rs_name = xstrdup(sym);
symp->rs_num = rcsnum_alloc();
rcsnum_cpy(snum, symp->rs_num, 0);
TAILQ_INSERT_HEAD(&(rfp->rf_symbols), symp, rs_list);
/* not synced anymore */
rfp->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_sym_remove()
*
* Remove the symbol with name <sym> from the symbol list for the RCS file
* <file>. If no such symbol is found, the call fails and returns with an
* error.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_sym_remove(RCSFILE *file, const char *sym)
{
struct rcs_sym *symp;
if (!rcs_sym_check(sym)) {
rcs_errno = RCS_ERR_BADSYM;
return (-1);
}
TAILQ_FOREACH(symp, &(file->rf_symbols), rs_list)
if (strcmp(symp->rs_name, sym) == 0)
break;
if (symp == NULL) {
rcs_errno = RCS_ERR_NOENT;
return (-1);
}
TAILQ_REMOVE(&(file->rf_symbols), symp, rs_list);
xfree(symp->rs_name);
rcsnum_free(symp->rs_num);
xfree(symp);
/* not synced anymore */
file->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_sym_getrev()
*
* Retrieve the RCS revision number associated with the symbol <sym> for the
* RCS file <file>. The returned value is a dynamically-allocated copy and
* should be freed by the caller once they are done with it.
* Returns the RCSNUM on success, or NULL on failure.
*/
RCSNUM *
rcs_sym_getrev(RCSFILE *file, const char *sym)
{
RCSNUM *num;
struct rcs_sym *symp;
if (!rcs_sym_check(sym)) {
rcs_errno = RCS_ERR_BADSYM;
return (NULL);
}
num = NULL;
TAILQ_FOREACH(symp, &(file->rf_symbols), rs_list)
if (strcmp(symp->rs_name, sym) == 0)
break;
if (symp == NULL) {
rcs_errno = RCS_ERR_NOENT;
} else {
num = rcsnum_alloc();
rcsnum_cpy(symp->rs_num, num, 0);
}
return (num);
}
/*
* rcs_sym_check()
*
* Check the RCS symbol name <sym> for any unsupported characters.
* Returns 1 if the tag is correct, 0 if it isn't valid.
*/
int
rcs_sym_check(const char *sym)
{
int ret;
const char *cp;
ret = 1;
cp = sym;
if (!isalpha(*cp++))
return (0);
for (; *cp != '\0'; cp++)
if (!isgraph(*cp) || (strchr(rcs_sym_invch, *cp) != NULL)) {
ret = 0;
break;
}
return (ret);
}
/*
* rcs_lock_getmode()
*
* Retrieve the locking mode of the RCS file <file>.
*/
int
rcs_lock_getmode(RCSFILE *file)
{
return (file->rf_flags & RCS_SLOCK) ? RCS_LOCK_STRICT : RCS_LOCK_LOOSE;
}
/*
* rcs_lock_setmode()
*
* Set the locking mode of the RCS file <file> to <mode>, which must either
* be RCS_LOCK_LOOSE or RCS_LOCK_STRICT.
* Returns the previous mode on success, or -1 on failure.
*/
int
rcs_lock_setmode(RCSFILE *file, int mode)
{
int pmode;
pmode = rcs_lock_getmode(file);
if (mode == RCS_LOCK_STRICT)
file->rf_flags |= RCS_SLOCK;
else if (mode == RCS_LOCK_LOOSE)
file->rf_flags &= ~RCS_SLOCK;
else
errx(1, "rcs_lock_setmode: invalid mode `%d'", mode);
file->rf_flags &= ~RCS_SYNCED;
return (pmode);
}
/*
* rcs_lock_add()
*
* Add an RCS lock for the user <user> on revision <rev>.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_lock_add(RCSFILE *file, const char *user, RCSNUM *rev)
{
struct rcs_lock *lkp;
/* first look for duplication */
TAILQ_FOREACH(lkp, &(file->rf_locks), rl_list) {
if (strcmp(lkp->rl_name, user) == 0 &&
rcsnum_cmp(rev, lkp->rl_num, 0) == 0) {
rcs_errno = RCS_ERR_DUPENT;
return (-1);
}
}
lkp = xmalloc(sizeof(*lkp));
lkp->rl_name = xstrdup(user);
lkp->rl_num = rcsnum_alloc();
rcsnum_cpy(rev, lkp->rl_num, 0);
TAILQ_INSERT_TAIL(&(file->rf_locks), lkp, rl_list);
/* not synced anymore */
file->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_lock_remove()
*
* Remove the RCS lock on revision <rev>.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_lock_remove(RCSFILE *file, const char *user, RCSNUM *rev)
{
struct rcs_lock *lkp;
TAILQ_FOREACH(lkp, &(file->rf_locks), rl_list) {
if (strcmp(lkp->rl_name, user) == 0 &&
rcsnum_cmp(lkp->rl_num, rev, 0) == 0)
break;
}
if (lkp == NULL) {
rcs_errno = RCS_ERR_NOENT;
return (-1);
}
TAILQ_REMOVE(&(file->rf_locks), lkp, rl_list);
rcsnum_free(lkp->rl_num);
xfree(lkp->rl_name);
xfree(lkp);
/* not synced anymore */
file->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_desc_get()
*
* Retrieve the description for the RCS file <file>.
*/
const char *
rcs_desc_get(RCSFILE *file)
{
return (file->rf_desc);
}
/*
* rcs_desc_set()
*
* Set the description for the RCS file <file>.
*/
void
rcs_desc_set(RCSFILE *file, const char *desc)
{
char *tmp;
tmp = xstrdup(desc);
if (file->rf_desc != NULL)
xfree(file->rf_desc);
file->rf_desc = tmp;
file->rf_flags &= ~RCS_SYNCED;
}
/*
* rcs_comment_lookup()
*
* Lookup the assumed comment leader based on a file's suffix.
* Returns a pointer to the string on success, or NULL on failure.
*/
const char *
rcs_comment_lookup(const char *filename)
{
int i;
const char *sp;
if ((sp = strrchr(filename, '.')) == NULL) {
rcs_errno = RCS_ERR_NOENT;
return (NULL);
}
sp++;
for (i = 0; i < (int)NB_COMTYPES; i++)
if (strcmp(rcs_comments[i].rc_suffix, sp) == 0)
return (rcs_comments[i].rc_cstr);
return (NULL);
}
/*
* rcs_comment_get()
*
* Retrieve the comment leader for the RCS file <file>.
*/
const char *
rcs_comment_get(RCSFILE *file)
{
return (file->rf_comment);
}
/*
* rcs_comment_set()
*
* Set the comment leader for the RCS file <file>.
*/
void
rcs_comment_set(RCSFILE *file, const char *comment)
{
char *tmp;
tmp = xstrdup(comment);
if (file->rf_comment != NULL)
xfree(file->rf_comment);
file->rf_comment = tmp;
file->rf_flags &= ~RCS_SYNCED;
}
/*
* rcs_tag_resolve()
*
* Retrieve the revision number corresponding to the tag <tag> for the RCS
* file <file>.
*/
RCSNUM *
rcs_tag_resolve(RCSFILE *file, const char *tag)
{
RCSNUM *num;
if ((num = rcsnum_parse(tag)) == NULL) {
num = rcs_sym_getrev(file, tag);
}
return (num);
}
int
rcs_patch_lines(struct rcs_lines *dlines, struct rcs_lines *plines)
{
char op, *ep;
struct rcs_line *lp, *dlp, *ndlp;
int i, lineno, nbln;
dlp = TAILQ_FIRST(&(dlines->l_lines));
lp = TAILQ_FIRST(&(plines->l_lines));
/* skip first bogus line */
for (lp = TAILQ_NEXT(lp, l_list); lp != NULL;
lp = TAILQ_NEXT(lp, l_list)) {
op = *(lp->l_line);
lineno = (int)strtol((lp->l_line + 1), &ep, 10);
if (lineno > dlines->l_nblines || lineno < 0 ||
*ep != ' ')
errx(1, "invalid line specification in RCS patch");
ep++;
nbln = (int)strtol(ep, &ep, 10);
if (nbln < 0 || *ep != '\0')
errx(1,
"invalid line number specification in RCS patch");
/* find the appropriate line */
for (;;) {
if (dlp == NULL)
break;
if (dlp->l_lineno == lineno)
break;
if (dlp->l_lineno > lineno) {
dlp = TAILQ_PREV(dlp, rcs_tqh, l_list);
} else if (dlp->l_lineno < lineno) {
if (((ndlp = TAILQ_NEXT(dlp, l_list)) == NULL) ||
ndlp->l_lineno > lineno)
break;
dlp = ndlp;
}
}
if (dlp == NULL)
errx(1, "can't find referenced line in RCS patch");
if (op == 'd') {
for (i = 0; (i < nbln) && (dlp != NULL); i++) {
ndlp = TAILQ_NEXT(dlp, l_list);
TAILQ_REMOVE(&(dlines->l_lines), dlp, l_list);
dlp = ndlp;
/* last line is gone - reset dlp */
if (dlp == NULL) {
ndlp = TAILQ_LAST(&(dlines->l_lines),
rcs_tqh);
dlp = ndlp;
}
}
} else if (op == 'a') {
for (i = 0; i < nbln; i++) {
ndlp = lp;
lp = TAILQ_NEXT(lp, l_list);
if (lp == NULL)
errx(1, "truncated RCS patch");
TAILQ_REMOVE(&(plines->l_lines), lp, l_list);
TAILQ_INSERT_AFTER(&(dlines->l_lines), dlp,
lp, l_list);
dlp = lp;
/* we don't want lookup to block on those */
lp->l_lineno = lineno;
lp = ndlp;
}
} else
errx(1, "unknown RCS patch operation `%c'", op);
/* last line of the patch, done */
if (lp->l_lineno == plines->l_nblines)
break;
}
/* once we're done patching, rebuild the line numbers */
lineno = 0;
TAILQ_FOREACH(lp, &(dlines->l_lines), l_list)
lp->l_lineno = lineno++;
dlines->l_nblines = lineno - 1;
return (0);
}
/*
* rcs_getrev()
*
* Get the whole contents of revision <rev> from the RCSFILE <rfp>. The
* returned buffer is dynamically allocated and should be released using
* rcs_buf_free() once the caller is done using it.
*/
BUF*
rcs_getrev(RCSFILE *rfp, RCSNUM *frev)
{
u_int i, numlen;
int isbranch, lookonbranch;
size_t len;
void *bp;
RCSNUM *crev, *rev, *brev;
BUF *rbuf;
struct rcs_delta *rdp = NULL;
struct rcs_branch *rb;
if (rfp->rf_head == NULL)
return (NULL);
if (frev == RCS_HEAD_REV)
rev = rfp->rf_head;
else
rev = frev;
/* XXX rcsnum_cmp() */
for (i = 0; i < rfp->rf_head->rn_len; i++) {
if (rfp->rf_head->rn_id[i] < rev->rn_id[i]) {
rcs_errno = RCS_ERR_NOENT;
return (NULL);
}
}
/* No matter what, we're going to need up the the description parsed */
rcs_parse_desc(rfp, NULL);
rdp = rcs_findrev(rfp, rfp->rf_head);
if (rdp == NULL) {
warnx("failed to get RCS HEAD revision");
return (NULL);
}
if (rdp->rd_tlen == 0)
rcs_parse_deltatexts(rfp, rfp->rf_head);
len = rdp->rd_tlen;
if (len == 0) {
rbuf = rcs_buf_alloc(1, 0);
rcs_buf_empty(rbuf);
return (rbuf);
}
rbuf = rcs_buf_alloc(len, BUF_AUTOEXT);
rcs_buf_append(rbuf, rdp->rd_text, len);
isbranch = 0;
brev = NULL;
/*
* If a branch was passed, get the latest revision on it.
*/
if (RCSNUM_ISBRANCH(rev)) {
brev = rev;
rdp = rcs_findrev(rfp, rev);
if (rdp == NULL)
return (NULL);
rev = rdp->rd_num;
} else {
if (RCSNUM_ISBRANCHREV(rev)) {
brev = rcsnum_revtobr(rev);
isbranch = 1;
}
}
lookonbranch = 0;
crev = NULL;
/* Apply patches backwards to get the right version.
*/
do {
if (rcsnum_cmp(rfp->rf_head, rev, 0) == 0)
break;
if (isbranch == 1 && rdp->rd_num->rn_len < rev->rn_len &&
!TAILQ_EMPTY(&(rdp->rd_branches)))
lookonbranch = 1;
if (isbranch && lookonbranch == 1) {
lookonbranch = 0;
TAILQ_FOREACH(rb, &(rdp->rd_branches), rb_list) {
/* XXX rcsnum_cmp() is totally broken for
* this purpose.
*/
numlen = MIN(brev->rn_len, rb->rb_num->rn_len);
for (i = 0; i < numlen; i++) {
if (rb->rb_num->rn_id[i] !=
brev->rn_id[i])
break;
}
if (i == numlen) {
crev = rb->rb_num;
break;
}
}
} else {
crev = rdp->rd_next;
}
rdp = rcs_findrev(rfp, crev);
if (rdp == NULL) {
rcs_buf_free(rbuf);
return (NULL);
}
rcs_buf_putc(rbuf, '\0');
/* check if we have parsed this rev's deltatext */
if (rdp->rd_tlen == 0)
rcs_parse_deltatexts(rfp, rdp->rd_num);
bp = rcs_buf_release(rbuf);
rbuf = rcs_patchfile((char *)bp, (char *)rdp->rd_text,
rcs_patch_lines);
xfree(bp);
if (rbuf == NULL)
break;
} while (rcsnum_cmp(crev, rev, 0) != 0);
if (rcs_buf_getc(rbuf, rcs_buf_len(rbuf)-1) != '\n' &&
rbuf != NULL)
rcs_buf_putc(rbuf, '\n');
return (rbuf);
}
/*
* rcs_rev_add()
*
* Add a revision to the RCS file <rf>. The new revision's number can be
* specified in <rev> (which can also be RCS_HEAD_REV, in which case the
* new revision will have a number equal to the previous head revision plus
* one). The <msg> argument specifies the log message for that revision, and
* <date> specifies the revision's date (a value of -1 is
* equivalent to using the current time).
* If <username> is NULL, set the author for this revision to the current user.
* Otherwise, set it to <username>.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_rev_add(RCSFILE *rf, RCSNUM *rev, const char *msg, time_t date,
const char *username)
{
time_t now;
struct passwd *pw;
struct rcs_delta *ordp, *rdp;
if (rev == RCS_HEAD_REV) {
if (rf->rf_flags & RCS_CREATE) {
if ((rev = rcsnum_parse(RCS_HEAD_INIT)) == NULL)
return (-1);
rf->rf_head = rcsnum_alloc();
rcsnum_cpy(rev, rf->rf_head, 0);
} else {
rev = rcsnum_inc(rf->rf_head);
}
} else {
if ((rdp = rcs_findrev(rf, rev)) != NULL) {
rcs_errno = RCS_ERR_DUPENT;
return (-1);
}
}
if ((pw = getpwuid(getuid())) == NULL)
errx(1, "getpwuid failed");
rdp = xcalloc(1, sizeof(*rdp));
TAILQ_INIT(&(rdp->rd_branches));
rdp->rd_num = rcsnum_alloc();
rcsnum_cpy(rev, rdp->rd_num, 0);
rdp->rd_next = rcsnum_alloc();
if (!(rf->rf_flags & RCS_CREATE)) {
/* next should point to the previous HEAD */
ordp = TAILQ_FIRST(&(rf->rf_delta));
rcsnum_cpy(ordp->rd_num, rdp->rd_next, 0);
}
if (username == NULL)
username = pw->pw_name;
rdp->rd_author = xstrdup(username);
rdp->rd_state = xstrdup(RCS_STATE_EXP);
rdp->rd_log = xstrdup(msg);
if (date != (time_t)(-1))
now = date;
else
time(&now);
gmtime_r(&now, &(rdp->rd_date));
TAILQ_INSERT_HEAD(&(rf->rf_delta), rdp, rd_list);
rf->rf_ndelta++;
/* not synced anymore */
rf->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_rev_remove()
*
* Remove the revision whose number is <rev> from the RCS file <rf>.
*/
int
rcs_rev_remove(RCSFILE *rf, RCSNUM *rev)
{
size_t len;
char *tmpdir;
char *newdeltatext, path_tmp1[MAXPATHLEN], path_tmp2[MAXPATHLEN];
struct rcs_delta *rdp, *prevrdp, *nextrdp;
BUF *nextbuf, *prevbuf, *newdiff;
tmpdir = rcs_tmpdir;
if (rev == RCS_HEAD_REV)
rev = rf->rf_head;
/* do we actually have that revision? */
if ((rdp = rcs_findrev(rf, rev)) == NULL) {
rcs_errno = RCS_ERR_NOENT;
return (-1);
}
/*
* This is confusing, the previous delta is next in the TAILQ list.
* the next delta is the previous one in the TAILQ list.
*
* When the HEAD revision got specified, nextrdp will be NULL.
* When the first revision got specified, prevrdp will be NULL.
*/
prevrdp = (struct rcs_delta *)TAILQ_NEXT(rdp, rd_list);
nextrdp = (struct rcs_delta *)TAILQ_PREV(rdp, rcs_tqh, rd_list);
newdeltatext = NULL;
prevbuf = nextbuf = NULL;
if (prevrdp != NULL) {
if ((prevbuf = rcs_getrev(rf, prevrdp->rd_num)) == NULL)
errx(1, "error getting revision");
}
if (prevrdp != NULL && nextrdp != NULL) {
if ((nextbuf = rcs_getrev(rf, nextrdp->rd_num)) == NULL)
errx(1, "error getting revision");
newdiff = rcs_buf_alloc(64, BUF_AUTOEXT);
/* calculate new diff */
len = strlcpy(path_tmp1, tmpdir, sizeof(path_tmp1));
if (len >= sizeof(path_tmp1))
errx(1, "path truncation in rcs_rev_remove");
len = strlcat(path_tmp1, "/diff1.XXXXXXXXXX",
sizeof(path_tmp1));
if (len >= sizeof(path_tmp1))
errx(1, "path truncation in rcs_rev_remove");
rcs_buf_write_stmp(nextbuf, path_tmp1, 0600);
rcs_buf_free(nextbuf);
len = strlcpy(path_tmp2, tmpdir, sizeof(path_tmp2));
if (len >= sizeof(path_tmp2))
errx(1, "path truncation in rcs_rev_remove");
len = strlcat(path_tmp2, "/diff2.XXXXXXXXXX",
sizeof(path_tmp2));
if (len >= sizeof(path_tmp2))
errx(1, "path truncation in rcs_rev_remove");
rcs_buf_write_stmp(prevbuf, path_tmp2, 0600);
rcs_buf_free(prevbuf);
diff_format = D_RCSDIFF;
rcs_diffreg(path_tmp1, path_tmp2, newdiff);
newdeltatext = rcs_buf_release(newdiff);
} else if (nextrdp == NULL && prevrdp != NULL) {
newdeltatext = rcs_buf_release(prevbuf);
}
if (newdeltatext != NULL) {
if (rcs_deltatext_set(rf, prevrdp->rd_num, newdeltatext) < 0)
errx(1, "error setting new deltatext");
}
TAILQ_REMOVE(&(rf->rf_delta), rdp, rd_list);
/* update pointers */
if (prevrdp != NULL && nextrdp != NULL) {
rcsnum_cpy(prevrdp->rd_num, nextrdp->rd_next, 0);
} else if (prevrdp != NULL) {
if (rcs_head_set(rf, prevrdp->rd_num) < 0)
errx(1, "rcs_head_set failed");
} else if (nextrdp != NULL) {
rcsnum_free(nextrdp->rd_next);
nextrdp->rd_next = rcsnum_alloc();
} else {
rcsnum_free(rf->rf_head);
rf->rf_head = NULL;
}
rf->rf_ndelta--;
rf->rf_flags &= ~RCS_SYNCED;
rcs_freedelta(rdp);
if (newdeltatext != NULL)
xfree(newdeltatext);
return (0);
}
/*
* rcs_findrev()
*
* Find a specific revision's delta entry in the tree of the RCS file <rfp>.
* The revision number is given in <rev>.
*
* If the given revision is a branch number, we translate it into the latest
* revision on the branch.
*
* Returns a pointer to the delta on success, or NULL on failure.
*/
struct rcs_delta *
rcs_findrev(RCSFILE *rfp, RCSNUM *rev)
{
u_int cmplen;
struct rcs_delta *rdp;
RCSNUM *brev, *frev;
/*
* We need to do more parsing if the last revision in the linked list
* is greater than the requested revision.
*/
rdp = TAILQ_LAST(&(rfp->rf_delta), rcs_dlist);
if (rdp == NULL ||
rcsnum_cmp(rdp->rd_num, rev, 0) == -1) {
rcs_parse_deltas(rfp, rev);
}
/*
* Translate a branch into the latest revision on the branch itself.
*/
if (RCSNUM_ISBRANCH(rev)) {
brev = rcsnum_brtorev(rev);
frev = brev;
for (;;) {
rdp = rcs_findrev(rfp, frev);
if (rdp == NULL)
return (NULL);
if (rdp->rd_next->rn_len == 0)
break;
frev = rdp->rd_next;
}
rcsnum_free(brev);
return (rdp);
}
cmplen = rev->rn_len;
TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) {
if (rcsnum_cmp(rdp->rd_num, rev, cmplen) == 0)
return (rdp);
}
return (NULL);
}
/*
* rcs_kwexp_set()
*
* Set the keyword expansion mode to use on the RCS file <file> to <mode>.
*/
void
rcs_kwexp_set(RCSFILE *file, int mode)
{
int i;
char *tmp, buf[8] = "";
if (RCS_KWEXP_INVAL(mode))
return;
i = 0;
if (mode == RCS_KWEXP_NONE)
buf[0] = 'b';
else if (mode == RCS_KWEXP_OLD)
buf[0] = 'o';
else {
if (mode & RCS_KWEXP_NAME)
buf[i++] = 'k';
if (mode & RCS_KWEXP_VAL)
buf[i++] = 'v';
if (mode & RCS_KWEXP_LKR)
buf[i++] = 'l';
}
tmp = xstrdup(buf);
if (file->rf_expand != NULL)
xfree(file->rf_expand);
file->rf_expand = tmp;
/* not synced anymore */
file->rf_flags &= ~RCS_SYNCED;
}
/*
* rcs_kwexp_get()
*
* Retrieve the keyword expansion mode to be used for the RCS file <file>.
*/
int
rcs_kwexp_get(RCSFILE *file)
{
return rcs_kflag_get(file->rf_expand);
}
/*
* rcs_kflag_get()
*
* Get the keyword expansion mode from a set of character flags given in
* <flags> and return the appropriate flag mask. In case of an error, the
* returned mask will have the RCS_KWEXP_ERR bit set to 1.
*/
int
rcs_kflag_get(const char *flags)
{
int fl;
size_t len;
const char *fp;
fl = 0;
len = strlen(flags);
for (fp = flags; *fp != '\0'; fp++) {
if (*fp == 'k')
fl |= RCS_KWEXP_NAME;
else if (*fp == 'v')
fl |= RCS_KWEXP_VAL;
else if (*fp == 'l')
fl |= RCS_KWEXP_LKR;
else if (*fp == 'o') {
if (len != 1)
fl |= RCS_KWEXP_ERR;
fl |= RCS_KWEXP_OLD;
} else if (*fp == 'b') {
if (len != 1)
fl |= RCS_KWEXP_ERR;
} else /* unknown letter */
fl |= RCS_KWEXP_ERR;
}
return (fl);
}
/*
* rcs_errstr()
*
* Get the error string matching the RCS error code <code>.
*/
const char *
rcs_errstr(int code)
{
const char *esp;
if (code < 0 || (code >= (int)RCS_NERR && code != RCS_ERR_ERRNO))
esp = NULL;
else if (code == RCS_ERR_ERRNO)
esp = strerror(errno);
else
esp = rcs_errstrs[code];
return (esp);
}
/* rcs_parse_deltas()
*
* Parse deltas. If <rev> is not NULL, parse only as far as that
* revision. If <rev> is NULL, parse all deltas.
*/
static void
rcs_parse_deltas(RCSFILE *rfp, RCSNUM *rev)
{
int ret;
struct rcs_delta *enddelta;
if ((rfp->rf_flags & PARSED_DELTAS) || (rfp->rf_flags & RCS_CREATE))
return;
for (;;) {
ret = rcs_parse_delta(rfp);
if (rev != NULL) {
enddelta = TAILQ_LAST(&(rfp->rf_delta), rcs_dlist);
if (rcsnum_cmp(enddelta->rd_num, rev, 0) == 0)
break;
}
if (ret == 0) {
rfp->rf_flags |= PARSED_DELTAS;
break;
}
else if (ret == -1)
errx(1, "error parsing deltas");
}
}
/* rcs_parse_deltatexts()
*
* Parse deltatexts. If <rev> is not NULL, parse only as far as that
* revision. If <rev> is NULL, parse everything.
*/
static void
rcs_parse_deltatexts(RCSFILE *rfp, RCSNUM *rev)
{
int ret;
struct rcs_delta *rdp;
if ((rfp->rf_flags & PARSED_DELTATEXTS) ||
(rfp->rf_flags & RCS_CREATE))
return;
if (!(rfp->rf_flags & PARSED_DESC))
rcs_parse_desc(rfp, rev);
for (;;) {
if (rev != NULL) {
rdp = rcs_findrev(rfp, rev);
if (rdp->rd_text != NULL)
break;
else
ret = rcs_parse_deltatext(rfp);
} else
ret = rcs_parse_deltatext(rfp);
if (ret == 0) {
rfp->rf_flags |= PARSED_DELTATEXTS;
break;
}
else if (ret == -1)
errx(1, "problem parsing deltatexts");
}
}
/* rcs_parse_desc()
*
* Parse RCS description.
*/
static void
rcs_parse_desc(RCSFILE *rfp, RCSNUM *rev)
{
int ret = 0;
if ((rfp->rf_flags & PARSED_DESC) || (rfp->rf_flags & RCS_CREATE))
return;
if (!(rfp->rf_flags & PARSED_DELTAS))
rcs_parse_deltas(rfp, rev);
/* do parsing */
ret = rcs_gettok(rfp);
if (ret != RCS_TOK_DESC)
errx(1, "token `%s' found where RCS desc expected",
RCS_TOKSTR(rfp));
ret = rcs_gettok(rfp);
if (ret != RCS_TOK_STRING)
errx(1, "token `%s' found where RCS desc expected",
RCS_TOKSTR(rfp));
rfp->rf_desc = xstrdup(RCS_TOKSTR(rfp));
rfp->rf_flags |= PARSED_DESC;
}
/*
* rcs_parse_init()
*
* Initial parsing of file <path>, which are in the RCS format.
* Just does admin section.
*/
static void
rcs_parse_init(RCSFILE *rfp)
{
struct rcs_pdata *pdp;
if (rfp->rf_flags & RCS_PARSED)
return;
pdp = xcalloc(1, sizeof(*pdp));
pdp->rp_lines = 0;
pdp->rp_pttype = RCS_TOK_ERR;
if ((pdp->rp_file = fopen(rfp->rf_path, "r")) == NULL)
err(1, "fopen: `%s'", rfp->rf_path);
pdp->rp_buf = xmalloc((size_t)RCS_BUFSIZE);
pdp->rp_blen = RCS_BUFSIZE;
pdp->rp_bufend = pdp->rp_buf + pdp->rp_blen - 1;
/* ditch the strict lock */
rfp->rf_flags &= ~RCS_SLOCK;
rfp->rf_pdata = pdp;
if (rcs_parse_admin(rfp) < 0) {
rcs_freepdata(pdp);
errx(1, "could not parse admin data");
}
if (rfp->rf_flags & RCS_PARSE_FULLY)
rcs_parse_deltatexts(rfp, NULL);
rfp->rf_flags |= RCS_SYNCED;
}
/*
* rcs_parse_admin()
*
* Parse the administrative portion of an RCS file.
* Returns the type of the first token found after the admin section on
* success, or -1 on failure.
*/
static int
rcs_parse_admin(RCSFILE *rfp)
{
u_int i;
int tok, ntok, hmask;
struct rcs_key *rk;
/* hmask is a mask of the headers already encountered */
hmask = 0;
for (;;) {
tok = rcs_gettok(rfp);
if (tok == RCS_TOK_ERR) {
rcs_errno = RCS_ERR_PARSE;
warnx("parse error in RCS admin section");
goto fail;
} else if (tok == RCS_TOK_NUM || tok == RCS_TOK_DESC) {
/*
* Assume this is the start of the first delta or
* that we are dealing with an empty RCS file and
* we just found the description.
*/
rcs_pushtok(rfp, RCS_TOKSTR(rfp), tok);
return (tok);
}
rk = NULL;
for (i = 0; i < RCS_NKEYS; i++)
if (rcs_keys[i].rk_id == tok)
rk = &(rcs_keys[i]);
if (hmask & (1 << tok)) {
rcs_errno = RCS_ERR_PARSE;
warnx("duplicate RCS key");
goto fail;
}
hmask |= (1 << tok);
switch (tok) {
case RCS_TOK_HEAD:
case RCS_TOK_BRANCH:
case RCS_TOK_COMMENT:
case RCS_TOK_EXPAND:
ntok = rcs_gettok(rfp);
if (ntok == RCS_TOK_SCOLON)
break;
if (ntok != rk->rk_val) {
rcs_errno = RCS_ERR_PARSE;
warnx("invalid value type for RCS key `%s'",
rk->rk_str);
}
if (tok == RCS_TOK_HEAD) {
if (rfp->rf_head == NULL)
rfp->rf_head = rcsnum_alloc();
rcsnum_aton(RCS_TOKSTR(rfp), NULL,
rfp->rf_head);
} else if (tok == RCS_TOK_BRANCH) {
if (rfp->rf_branch == NULL)
rfp->rf_branch = rcsnum_alloc();
if (rcsnum_aton(RCS_TOKSTR(rfp), NULL,
rfp->rf_branch) < 0)
goto fail;
} else if (tok == RCS_TOK_COMMENT) {
rfp->rf_comment = xstrdup(RCS_TOKSTR(rfp));
} else if (tok == RCS_TOK_EXPAND) {
rfp->rf_expand = xstrdup(RCS_TOKSTR(rfp));
}
/* now get the expected semi-colon */
ntok = rcs_gettok(rfp);
if (ntok != RCS_TOK_SCOLON) {
rcs_errno = RCS_ERR_PARSE;
warnx("missing semi-colon after RCS `%s' key",
rk->rk_str);
goto fail;
}
break;
case RCS_TOK_ACCESS:
if (rcs_parse_access(rfp) < 0)
goto fail;
break;
case RCS_TOK_SYMBOLS:
if (rcs_parse_symbols(rfp) < 0)
goto fail;
break;
case RCS_TOK_LOCKS:
if (rcs_parse_locks(rfp) < 0)
goto fail;
break;
default:
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in RCS admin section",
RCS_TOKSTR(rfp));
goto fail;
}
}
fail:
return (-1);
}
/*
* rcs_parse_delta()
*
* Parse an RCS delta section and allocate the structure to store that delta's
* information in the <rfp> delta list.
* Returns 1 if the section was parsed OK, 0 if it is the last delta, and
* -1 on error.
*/
static int
rcs_parse_delta(RCSFILE *rfp)
{
int ret, tok, ntok, hmask;
u_int i;
char *tokstr;
RCSNUM *datenum;
struct rcs_delta *rdp;
struct rcs_key *rk;
rdp = xcalloc(1, sizeof(*rdp));
rdp->rd_num = rcsnum_alloc();
rdp->rd_next = rcsnum_alloc();
TAILQ_INIT(&(rdp->rd_branches));
tok = rcs_gettok(rfp);
if (tok == RCS_TOK_DESC) {
rcs_pushtok(rfp, RCS_TOKSTR(rfp), tok);
return (0);
} else if (tok != RCS_TOK_NUM) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' at start of delta",
RCS_TOKSTR(rfp));
rcs_freedelta(rdp);
return (-1);
}
rcsnum_aton(RCS_TOKSTR(rfp), NULL, rdp->rd_num);
hmask = 0;
ret = 0;
tokstr = NULL;
for (;;) {
tok = rcs_gettok(rfp);
if (tok == RCS_TOK_ERR) {
rcs_errno = RCS_ERR_PARSE;
warnx("parse error in RCS delta section");
rcs_freedelta(rdp);
return (-1);
} else if (tok == RCS_TOK_NUM || tok == RCS_TOK_DESC) {
rcs_pushtok(rfp, RCS_TOKSTR(rfp), tok);
ret = (tok == RCS_TOK_NUM ? 1 : 0);
break;
}
rk = NULL;
for (i = 0; i < RCS_NKEYS; i++)
if (rcs_keys[i].rk_id == tok)
rk = &(rcs_keys[i]);
if (hmask & (1 << tok)) {
rcs_errno = RCS_ERR_PARSE;
warnx("duplicate RCS key");
rcs_freedelta(rdp);
return (-1);
}
hmask |= (1 << tok);
switch (tok) {
case RCS_TOK_DATE:
case RCS_TOK_AUTHOR:
case RCS_TOK_STATE:
case RCS_TOK_NEXT:
ntok = rcs_gettok(rfp);
if (ntok == RCS_TOK_SCOLON) {
if (rk->rk_flags & RCS_VOPT)
break;
else {
rcs_errno = RCS_ERR_PARSE;
warnx("missing mandatory "
"value to RCS key `%s'",
rk->rk_str);
rcs_freedelta(rdp);
return (-1);
}
}
if (ntok != rk->rk_val) {
rcs_errno = RCS_ERR_PARSE;
warnx("invalid value type for RCS key `%s'",
rk->rk_str);
rcs_freedelta(rdp);
return (-1);
}
if (tokstr != NULL)
xfree(tokstr);
tokstr = xstrdup(RCS_TOKSTR(rfp));
/* now get the expected semi-colon */
ntok = rcs_gettok(rfp);
if (ntok != RCS_TOK_SCOLON) {
rcs_errno = RCS_ERR_PARSE;
warnx("missing semi-colon after RCS `%s' key",
rk->rk_str);
xfree(tokstr);
rcs_freedelta(rdp);
return (-1);
}
if (tok == RCS_TOK_DATE) {
if ((datenum = rcsnum_parse(tokstr)) == NULL) {
xfree(tokstr);
rcs_freedelta(rdp);
return (-1);
}
if (datenum->rn_len != 6) {
rcs_errno = RCS_ERR_PARSE;
warnx("RCS date specification has %s "
"fields",
(datenum->rn_len > 6) ? "too many" :
"missing");
xfree(tokstr);
rcs_freedelta(rdp);
rcsnum_free(datenum);
return (-1);
}
rdp->rd_date.tm_year = datenum->rn_id[0];
if (rdp->rd_date.tm_year >= 1900)
rdp->rd_date.tm_year -= 1900;
rdp->rd_date.tm_mon = datenum->rn_id[1] - 1;
rdp->rd_date.tm_mday = datenum->rn_id[2];
rdp->rd_date.tm_hour = datenum->rn_id[3];
rdp->rd_date.tm_min = datenum->rn_id[4];
rdp->rd_date.tm_sec = datenum->rn_id[5];
rcsnum_free(datenum);
} else if (tok == RCS_TOK_AUTHOR) {
rdp->rd_author = tokstr;
tokstr = NULL;
} else if (tok == RCS_TOK_STATE) {
rdp->rd_state = tokstr;
tokstr = NULL;
} else if (tok == RCS_TOK_NEXT) {
rcsnum_aton(tokstr, NULL, rdp->rd_next);
}
break;
case RCS_TOK_BRANCHES:
if (rcs_parse_branches(rfp, rdp) < 0) {
rcs_freedelta(rdp);
return (-1);
}
break;
default:
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in RCS delta",
RCS_TOKSTR(rfp));
rcs_freedelta(rdp);
return (-1);
}
}
if (tokstr != NULL)
xfree(tokstr);
TAILQ_INSERT_TAIL(&(rfp->rf_delta), rdp, rd_list);
rfp->rf_ndelta++;
return (ret);
}
/*
* rcs_parse_deltatext()
*
* Parse an RCS delta text section and fill in the log and text field of the
* appropriate delta section.
* Returns 1 if the section was parsed OK, 0 if it is the last delta, and
* -1 on error.
*/
static int
rcs_parse_deltatext(RCSFILE *rfp)
{
int tok;
RCSNUM *tnum;
struct rcs_delta *rdp;
tok = rcs_gettok(rfp);
if (tok == RCS_TOK_EOF)
return (0);
if (tok != RCS_TOK_NUM) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' at start of RCS delta text",
RCS_TOKSTR(rfp));
return (-1);
}
tnum = rcsnum_alloc();
rcsnum_aton(RCS_TOKSTR(rfp), NULL, tnum);
TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) {
if (rcsnum_cmp(tnum, rdp->rd_num, 0) == 0)
break;
}
rcsnum_free(tnum);
if (rdp == NULL) {
warnx("RCS delta text `%s' has no matching delta",
RCS_TOKSTR(rfp));
return (-1);
}
tok = rcs_gettok(rfp);
if (tok != RCS_TOK_LOG) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' where RCS log expected",
RCS_TOKSTR(rfp));
return (-1);
}
tok = rcs_gettok(rfp);
if (tok != RCS_TOK_STRING) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' where RCS log expected",
RCS_TOKSTR(rfp));
return (-1);
}
rdp->rd_log = xstrdup(RCS_TOKSTR(rfp));
tok = rcs_gettok(rfp);
if (tok != RCS_TOK_TEXT) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' where RCS text expected",
RCS_TOKSTR(rfp));
return (-1);
}
tok = rcs_gettok(rfp);
if (tok != RCS_TOK_STRING) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' where RCS text expected",
RCS_TOKSTR(rfp));
return (-1);
}
rdp->rd_text = xmalloc(RCS_TOKLEN(rfp) + 1);
strlcpy(rdp->rd_text, RCS_TOKSTR(rfp), (RCS_TOKLEN(rfp) + 1));
rdp->rd_tlen = RCS_TOKLEN(rfp);
return (1);
}
/*
* rcs_parse_access()
*
* Parse the access list given as value to the `access' keyword.
* Returns 0 on success, or -1 on failure.
*/
static int
rcs_parse_access(RCSFILE *rfp)
{
int type;
while ((type = rcs_gettok(rfp)) != RCS_TOK_SCOLON) {
if (type != RCS_TOK_ID) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in access list",
RCS_TOKSTR(rfp));
return (-1);
}
if (rcs_access_add(rfp, RCS_TOKSTR(rfp)) < 0)
return (-1);
}
return (0);
}
/*
* rcs_parse_symbols()
*
* Parse the symbol list given as value to the `symbols' keyword.
* Returns 0 on success, or -1 on failure.
*/
static int
rcs_parse_symbols(RCSFILE *rfp)
{
int type;
struct rcs_sym *symp;
for (;;) {
type = rcs_gettok(rfp);
if (type == RCS_TOK_SCOLON)
break;
if (type != RCS_TOK_ID) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in symbol list",
RCS_TOKSTR(rfp));
return (-1);
}
symp = xmalloc(sizeof(*symp));
symp->rs_name = xstrdup(RCS_TOKSTR(rfp));
symp->rs_num = rcsnum_alloc();
type = rcs_gettok(rfp);
if (type != RCS_TOK_COLON) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in symbol list",
RCS_TOKSTR(rfp));
rcsnum_free(symp->rs_num);
xfree(symp->rs_name);
xfree(symp);
return (-1);
}
type = rcs_gettok(rfp);
if (type != RCS_TOK_NUM) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in symbol list",
RCS_TOKSTR(rfp));
rcsnum_free(symp->rs_num);
xfree(symp->rs_name);
xfree(symp);
return (-1);
}
if (rcsnum_aton(RCS_TOKSTR(rfp), NULL, symp->rs_num) < 0) {
warnx("failed to parse RCS NUM `%s'",
RCS_TOKSTR(rfp));
rcsnum_free(symp->rs_num);
xfree(symp->rs_name);
xfree(symp);
return (-1);
}
TAILQ_INSERT_TAIL(&(rfp->rf_symbols), symp, rs_list);
}
return (0);
}
/*
* rcs_parse_locks()
*
* Parse the lock list given as value to the `locks' keyword.
* Returns 0 on success, or -1 on failure.
*/
static int
rcs_parse_locks(RCSFILE *rfp)
{
int type;
struct rcs_lock *lkp;
for (;;) {
type = rcs_gettok(rfp);
if (type == RCS_TOK_SCOLON)
break;
if (type != RCS_TOK_ID) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in lock list",
RCS_TOKSTR(rfp));
return (-1);
}
lkp = xmalloc(sizeof(*lkp));
lkp->rl_name = xstrdup(RCS_TOKSTR(rfp));
lkp->rl_num = rcsnum_alloc();
type = rcs_gettok(rfp);
if (type != RCS_TOK_COLON) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in symbol list",
RCS_TOKSTR(rfp));
rcsnum_free(lkp->rl_num);
xfree(lkp->rl_name);
xfree(lkp);
return (-1);
}
type = rcs_gettok(rfp);
if (type != RCS_TOK_NUM) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in symbol list",
RCS_TOKSTR(rfp));
rcsnum_free(lkp->rl_num);
xfree(lkp->rl_name);
xfree(lkp);
return (-1);
}
if (rcsnum_aton(RCS_TOKSTR(rfp), NULL, lkp->rl_num) < 0) {
warnx("failed to parse RCS NUM `%s'",
RCS_TOKSTR(rfp));
rcsnum_free(lkp->rl_num);
xfree(lkp->rl_name);
xfree(lkp);
return (-1);
}
TAILQ_INSERT_HEAD(&(rfp->rf_locks), lkp, rl_list);
}
/* check if we have a `strict' */
type = rcs_gettok(rfp);
if (type != RCS_TOK_STRICT) {
rcs_pushtok(rfp, RCS_TOKSTR(rfp), type);
} else {
rfp->rf_flags |= RCS_SLOCK;
type = rcs_gettok(rfp);
if (type != RCS_TOK_SCOLON) {
rcs_errno = RCS_ERR_PARSE;
warnx("missing semi-colon after `strict' keyword");
return (-1);
}
}
return (0);
}
/*
* rcs_parse_branches()
*
* Parse the list of branches following a `branches' keyword in a delta.
* Returns 0 on success, or -1 on failure.
*/
static int
rcs_parse_branches(RCSFILE *rfp, struct rcs_delta *rdp)
{
int type;
struct rcs_branch *brp;
for (;;) {
type = rcs_gettok(rfp);
if (type == RCS_TOK_SCOLON)
break;
if (type != RCS_TOK_NUM) {
rcs_errno = RCS_ERR_PARSE;
warnx("unexpected token `%s' in list of branches",
RCS_TOKSTR(rfp));
return (-1);
}
brp = xmalloc(sizeof(*brp));
brp->rb_num = rcsnum_parse(RCS_TOKSTR(rfp));
if (brp->rb_num == NULL) {
xfree(brp);
return (-1);
}
TAILQ_INSERT_TAIL(&(rdp->rd_branches), brp, rb_list);
}
return (0);
}
/*
* rcs_freedelta()
*
* Free the contents of a delta structure.
*/
static void
rcs_freedelta(struct rcs_delta *rdp)
{
struct rcs_branch *rb;
if (rdp->rd_num != NULL)
rcsnum_free(rdp->rd_num);
if (rdp->rd_next != NULL)
rcsnum_free(rdp->rd_next);
if (rdp->rd_author != NULL)
xfree(rdp->rd_author);
if (rdp->rd_locker != NULL)
xfree(rdp->rd_locker);
if (rdp->rd_state != NULL)
xfree(rdp->rd_state);
if (rdp->rd_log != NULL)
xfree(rdp->rd_log);
if (rdp->rd_text != NULL)
xfree(rdp->rd_text);
while ((rb = TAILQ_FIRST(&(rdp->rd_branches))) != NULL) {
TAILQ_REMOVE(&(rdp->rd_branches), rb, rb_list);
rcsnum_free(rb->rb_num);
xfree(rb);
}
xfree(rdp);
}
/*
* rcs_freepdata()
*
* Free the contents of the parser data structure.
*/
static void
rcs_freepdata(struct rcs_pdata *pd)
{
if (pd->rp_file != NULL)
(void)fclose(pd->rp_file);
if (pd->rp_buf != NULL)
xfree(pd->rp_buf);
xfree(pd);
}
/*
* rcs_gettok()
*
* Get the next RCS token from the string <str>.
*/
static int
rcs_gettok(RCSFILE *rfp)
{
u_int i;
int ch, last, type;
size_t len;
char *bp;
struct rcs_pdata *pdp = (struct rcs_pdata *)rfp->rf_pdata;
type = RCS_TOK_ERR;
bp = pdp->rp_buf;
pdp->rp_tlen = 0;
*bp = '\0';
if (pdp->rp_pttype != RCS_TOK_ERR) {
type = pdp->rp_pttype;
strlcpy(pdp->rp_buf, pdp->rp_ptok, pdp->rp_blen);
pdp->rp_pttype = RCS_TOK_ERR;
return (type);
}
/* skip leading whitespace */
/* XXX we must skip backspace too for compatibility, should we? */
do {
ch = getc(pdp->rp_file);
if (ch == '\n')
pdp->rp_lines++;
} while (isspace(ch));
if (ch == EOF) {
type = RCS_TOK_EOF;
} else if (ch == ';') {
type = RCS_TOK_SCOLON;
} else if (ch == ':') {
type = RCS_TOK_COLON;
} else if (isalpha(ch)) {
type = RCS_TOK_ID;
*(bp++) = ch;
for (;;) {
ch = getc(pdp->rp_file);
if (!isalnum(ch) && ch != '_' && ch != '-' &&
ch != '/') {
ungetc(ch, pdp->rp_file);
break;
}
*(bp++) = ch;
pdp->rp_tlen++;
if (bp == pdp->rp_bufend - 1) {
len = bp - pdp->rp_buf;
rcs_growbuf(rfp);
bp = pdp->rp_buf + len;
}
}
*bp = '\0';
if (type != RCS_TOK_ERR) {
for (i = 0; i < RCS_NKEYS; i++) {
if (strcmp(rcs_keys[i].rk_str,
pdp->rp_buf) == 0) {
type = rcs_keys[i].rk_id;
break;
}
}
}
} else if (ch == '@') {
/* we have a string */
type = RCS_TOK_STRING;
for (;;) {
ch = getc(pdp->rp_file);
if (ch == '@') {
ch = getc(pdp->rp_file);
if (ch != '@') {
ungetc(ch, pdp->rp_file);
break;
}
} else if (ch == '\n')
pdp->rp_lines++;
*(bp++) = ch;
pdp->rp_tlen++;
if (bp == pdp->rp_bufend - 1) {
len = bp - pdp->rp_buf;
rcs_growbuf(rfp);
bp = pdp->rp_buf + len;
}
}
*bp = '\0';
} else if (isdigit(ch)) {
*(bp++) = ch;
last = ch;
type = RCS_TOK_NUM;
for (;;) {
ch = getc(pdp->rp_file);
if (bp == pdp->rp_bufend)
break;
if (!isdigit(ch) && ch != '.') {
ungetc(ch, pdp->rp_file);
break;
}
if (last == '.' && ch == '.') {
type = RCS_TOK_ERR;
break;
}
last = ch;
*(bp++) = ch;
pdp->rp_tlen++;
}
*bp = '\0';
}
return (type);
}
/*
* rcs_pushtok()
*
* Push a token back in the parser's token buffer.
*/
static int
rcs_pushtok(RCSFILE *rfp, const char *tok, int type)
{
struct rcs_pdata *pdp = (struct rcs_pdata *)rfp->rf_pdata;
if (pdp->rp_pttype != RCS_TOK_ERR)
return (-1);
pdp->rp_pttype = type;
strlcpy(pdp->rp_ptok, tok, sizeof(pdp->rp_ptok));
return (0);
}
/*
* rcs_growbuf()
*
* Attempt to grow the internal parse buffer for the RCS file <rf> by
* RCS_BUFEXTSIZE.
* In case of failure, the original buffer is left unmodified.
*/
static void
rcs_growbuf(RCSFILE *rf)
{
void *tmp;
struct rcs_pdata *pdp = (struct rcs_pdata *)rf->rf_pdata;
tmp = xrealloc(pdp->rp_buf, 1, pdp->rp_blen + RCS_BUFEXTSIZE);
pdp->rp_buf = tmp;
pdp->rp_blen += RCS_BUFEXTSIZE;
pdp->rp_bufend = pdp->rp_buf + pdp->rp_blen - 1;
}
/*
* rcs_strprint()
*
* Output an RCS string <str> of size <slen> to the stream <stream>. Any
* '@' characters are escaped. Otherwise, the string can contain arbitrary
* binary data.
*/
static void
rcs_strprint(const u_char *str, size_t slen, FILE *stream)
{
const u_char *ap, *ep, *sp;
if (slen == 0)
return;
ep = str + slen - 1;
for (sp = str; sp <= ep;) {
ap = memchr(sp, '@', ep - sp);
if (ap == NULL)
ap = ep;
(void)fwrite(sp, sizeof(u_char), ap - sp + 1, stream);
if (*ap == '@')
putc('@', stream);
sp = ap + 1;
}
}
/*
* rcs_expand_keywords()
*
* Return expansion any RCS keywords in <data>
*
* On error, return NULL.
*/
static char *
rcs_expand_keywords(char *rcsfile, struct rcs_delta *rdp, char *data,
size_t len, int mode)
{
ptrdiff_t c_offset, sizdiff, start_offset;
size_t i;
int kwtype;
u_int j, found;
char *c, *kwstr, *start, *end, *tbuf;
char expbuf[256], buf[256];
struct tm tb;
char *fmt;
kwtype = 0;
kwstr = NULL;
i = 0;
/*
* -z support for RCS
*/
tb = rdp->rd_date;
if (timezone_flag != NULL)
rcs_set_tz(timezone_flag, rdp, &tb);
/*
* Keyword formats:
* $Keyword$
* $Keyword: value$
*/
for (c = data; *c != '\0' && i < len; c++) {
if (*c == '$') {
/* remember start of this possible keyword */
start = c;
start_offset = start - data;
/* first following character has to be alphanumeric */
c++;
if (!isalpha(*c)) {
c = start;
continue;
}
/* look for any matching keywords */
found = 0;
for (j = 0; j < RCS_NKWORDS; j++) {
if (!strncmp(c, rcs_expkw[j].kw_str,
strlen(rcs_expkw[j].kw_str))) {
found = 1;
kwstr = rcs_expkw[j].kw_str;
kwtype = rcs_expkw[j].kw_type;
break;
}
}
/* unknown keyword, continue looking */
if (found == 0) {
c = start;
continue;
}
/* next character has to be ':' or '$' */
c += strlen(kwstr);
if (*c != ':' && *c != '$') {
c = start;
continue;
}
/*
* if the next character was ':' we need to look for
* an '$' before the end of the line to be sure it is
* in fact a keyword.
*/
if (*c == ':') {
while (*c++) {
if (*c == '$' || *c == '\n')
break;
}
if (*c != '$') {
c = start;
continue;
}
}
c_offset = c - data;
end = c + 1;
/* start constructing the expansion */
expbuf[0] = '\0';
if (mode & RCS_KWEXP_NAME) {
strlcat(expbuf, "$", sizeof(expbuf));
strlcat(expbuf, kwstr, sizeof(expbuf));
if (mode & RCS_KWEXP_VAL)
strlcat(expbuf, ": ", sizeof(expbuf));
}
/*
* order matters because of RCS_KW_ID and
* RCS_KW_HEADER here
*/
if (mode & RCS_KWEXP_VAL) {
if (kwtype & RCS_KW_RCSFILE) {
if (!(kwtype & RCS_KW_FULLPATH))
strlcat(expbuf,
basename(rcsfile),
sizeof(expbuf));
else
strlcat(expbuf, rcsfile,
sizeof(expbuf));
strlcat(expbuf, " ", sizeof(expbuf));
}
if (kwtype & RCS_KW_REVISION) {
rcsnum_tostr(rdp->rd_num, buf,
sizeof(buf));
strlcat(buf, " ", sizeof(buf));
strlcat(expbuf, buf, sizeof(expbuf));
}
if (kwtype & RCS_KW_DATE) {
if (timezone_flag != NULL)
fmt = "%Y/%m/%d %H:%M:%S%z ";
else
fmt = "%Y/%m/%d %H:%M:%S ";
strftime(buf, sizeof(buf), fmt, &tb);
strlcat(expbuf, buf, sizeof(expbuf));
}
if (kwtype & RCS_KW_AUTHOR) {
strlcat(expbuf, rdp->rd_author,
sizeof(expbuf));
strlcat(expbuf, " ", sizeof(expbuf));
}
if (kwtype & RCS_KW_STATE) {
strlcat(expbuf, rdp->rd_state,
sizeof(expbuf));
strlcat(expbuf, " ", sizeof(expbuf));
}
/* order does not matter anymore below */
if (kwtype & RCS_KW_LOG)
strlcat(expbuf, " ", sizeof(expbuf));
if (kwtype & RCS_KW_SOURCE) {
strlcat(expbuf, rcsfile,
sizeof(expbuf));
strlcat(expbuf, " ", sizeof(expbuf));
}
if (kwtype & RCS_KW_NAME)
strlcat(expbuf, " ", sizeof(expbuf));
}
/* end the expansion */
if (mode & RCS_KWEXP_NAME)
strlcat(expbuf, "$", sizeof(expbuf));
sizdiff = strlen(expbuf) - (end - start);
tbuf = xstrdup(end);
/* only realloc if we have to */
if (sizdiff > 0) {
char *newdata;
len += sizdiff;
newdata = xrealloc(data, 1, len);
data = newdata;
/*
* ensure string pointers are not invalidated
* after realloc()
*/
start = data + start_offset;
c = data + c_offset;
}
strlcpy(start, expbuf, len);
strlcat(data, tbuf, len);
xfree(tbuf);
i += strlen(expbuf);
}
}
return (data);
}
/*
* rcs_deltatext_set()
*
* Set deltatext for <rev> in RCS file <rfp> to <dtext>
* Returns -1 on error, 0 on success.
*/
int
rcs_deltatext_set(RCSFILE *rfp, RCSNUM *rev, const char *dtext)
{
size_t len;
struct rcs_delta *rdp;
/* Write operations require full parsing */
rcs_parse_deltatexts(rfp, NULL);
if ((rdp = rcs_findrev(rfp, rev)) == NULL)
return (-1);
if (rdp->rd_text != NULL)
xfree(rdp->rd_text);
len = strlen(dtext);
if (len != 0) {
/* XXX - use xstrdup() if rd_text changes to char *. */
rdp->rd_text = xmalloc(len + 1);
rdp->rd_tlen = len;
(void)memcpy(rdp->rd_text, dtext, len + 1);
} else {
rdp->rd_text = NULL;
rdp->rd_tlen = 0;
}
return (0);
}
/*
* rcs_rev_setlog()
*
* Sets the log message of revision <rev> to <logtext>
*/
int
rcs_rev_setlog(RCSFILE *rfp, RCSNUM *rev, const char *logtext)
{
struct rcs_delta *rdp;
char buf[16];
rcsnum_tostr(rev, buf, sizeof(buf));
if ((rdp = rcs_findrev(rfp, rev)) == NULL)
return (-1);
if (rdp->rd_log != NULL)
xfree(rdp->rd_log);
rdp->rd_log = xstrdup(logtext);
rfp->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_rev_getdate()
*
* Get the date corresponding to a given revision.
* Returns the date on success, -1 on failure.
*/
time_t
rcs_rev_getdate(RCSFILE *rfp, RCSNUM *rev)
{
struct rcs_delta *rdp;
if ((rdp = rcs_findrev(rfp, rev)) == NULL)
return (-1);
return (mktime(&rdp->rd_date));
}
/*
* rcs_state_set()
*
* Sets the state of revision <rev> to <state>
* NOTE: default state is 'Exp'. States may not contain spaces.
*
* Returns -1 on failure, 0 on success.
*/
int
rcs_state_set(RCSFILE *rfp, RCSNUM *rev, const char *state)
{
struct rcs_delta *rdp;
if ((rdp = rcs_findrev(rfp, rev)) == NULL)
return (-1);
if (rdp->rd_state != NULL)
xfree(rdp->rd_state);
rdp->rd_state = xstrdup(state);
rfp->rf_flags &= ~RCS_SYNCED;
return (0);
}
/*
* rcs_state_check()
*
* Check if string <state> is valid.
*
* Returns 0 if the string is valid, -1 otherwise.
*/
int
rcs_state_check(const char *state)
{
if (strchr(state, ' ') != NULL)
return (-1);
return (0);
}
/*
* rcs_state_get()
*
* Get the state for a given revision of a specified RCSFILE.
*
* Returns NULL on failure.
*/
const char *
rcs_state_get(RCSFILE *rfp, RCSNUM *rev)
{
struct rcs_delta *rdp;
if ((rdp = rcs_findrev(rfp, rev)) == NULL)
return (NULL);
return (rdp->rd_state);
}
/*
* rcs_kwexp_buf()
*
* Do keyword expansion on a buffer if necessary
*
*/
BUF *
rcs_kwexp_buf(BUF *bp, RCSFILE *rf, RCSNUM *rev)
{
struct rcs_delta *rdp;
char *expanded, *tbuf;
int expmode;
size_t len;
/*
* Do keyword expansion if required.
*/
if (rf->rf_expand != NULL)
expmode = rcs_kwexp_get(rf);
else
expmode = RCS_KWEXP_DEFAULT;
if (!(expmode & RCS_KWEXP_NONE)) {
if ((rdp = rcs_findrev(rf, rev)) == NULL)
errx(1, "could not fetch revision");
rcs_buf_putc(bp, '\0');
len = rcs_buf_len(bp);
tbuf = rcs_buf_release(bp);
expanded = rcs_expand_keywords(rf->rf_path, rdp,
tbuf, len, expmode);
bp = rcs_buf_alloc(len, BUF_AUTOEXT);
rcs_buf_set(bp, expanded, strlen(expanded), 0);
xfree(expanded);
}
return (bp);
}
![[BACK]](/icons/back.gif){kind=icon}
Return to rcs.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / rcs