lobo/isync
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automate enumeration of power-of-two #defines

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this is a lot more legible, and makes it possible to insert values in
the middle without churn.

i didn't find a way to do this with the pre-processor, so we now have
another code generator.

we now use the $< make variable, which requires gmake on netbsd < 9.0,
and possibly other systems with an ancient make.
This commit is contained in:
Oswald Buddenhagen 2022-05-31 14:05:28 +02:00
parent 05122b678d
commit 6a78e2c5f6
10 changed files with 190 additions and 85 deletions
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1
src/.gitignore vendored
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@ -1,3 +1,4 @@
/*_enum.h
/drv_proxy.inc
/mbsync
/mdconvert

26
src/Makefile.am
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@ -19,6 +19,28 @@ drv_proxy.$(OBJEXT): drv_proxy.inc
drv_proxy.inc: $(srcdir)/driver.h $(srcdir)/drv_proxy.c $(srcdir)/drv_proxy_gen.pl
perl $(srcdir)/drv_proxy_gen.pl $(srcdir)/driver.h $(srcdir)/drv_proxy.c drv_proxy.inc
ENUM_GEN = $(srcdir)/bit_enum_gen.pl
$(mbsync_OBJECTS): common_enum.h
common_enum.h: common.h $(ENUM_GEN)
perl $(ENUM_GEN) < $< > $@
$(mbsync_OBJECTS): driver_enum.h
driver_enum.h: driver.h $(ENUM_GEN)
perl $(ENUM_GEN) < $< > $@
$(mbsync_OBJECTS): sync_enum.h
sync_enum.h: sync.h $(ENUM_GEN)
perl $(ENUM_GEN) < $< > $@
sync.$(OBJEXT): sync_c_enum.h
sync_c_enum.h: sync.c $(ENUM_GEN)
perl $(ENUM_GEN) < $< > $@
sync.$(OBJEXT) sync_state.$(OBJEXT): sync_p_enum.h
sync_p_enum.h: sync_p.h $(ENUM_GEN)
perl $(ENUM_GEN) < $< > $@
mdconvert_SOURCES = mdconvert.c
mdconvert_LDADD = $(DB_LIBS)
if with_mdconvert
@ -36,6 +58,6 @@ EXTRA_PROGRAMS = tst_timers
exampledir = $(docdir)/examples
example_DATA = mbsyncrc.sample
EXTRA_DIST = drv_proxy_gen.pl run-tests.pl $(example_DATA) $(man_MANS)
EXTRA_DIST = bit_enum_gen.pl drv_proxy_gen.pl run-tests.pl $(example_DATA) $(man_MANS)
CLEANFILES = drv_proxy.inc
CLEANFILES = *_enum.h drv_proxy.inc

55
src/bit_enum_gen.pl Executable file
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@ -0,0 +1,55 @@
#!/usr/bin/perl
#
# SPDX-FileCopyrightText: 2022 Oswald Buddenhagen <ossi@users.sf.net>
# SPDX-License-Identifier: GPL-2.0-or-later
#
# mbsync - mailbox synchronizer
#
use strict;
use warnings;
my $in_enum = 0;
my $conts;
while (<>) {
s,\s*(?://.*)?$,,;
if ($in_enum) {
if (/^\)$/) {
$conts =~ s/\s//g;
$conts =~ s/,$//;
my @vals = split(/,/, $conts);
my $pfx;
for my $e (@vals) {
if (!defined($pfx)) {
$pfx = ($e =~ /^([A-Z]+_)/) ? $1 : "";
} elsif (length($pfx)) {
$pfx = "" if ((($e =~ /^([A-Z]+_)/) ? $1 : "") ne $pfx);
}
}
my $bit = 1;
my $bitn = 0;
for my $e (@vals) {
my $bits = ($e =~ s/\((\d+)\)$//) ? $1 : 1;
if ($bits != 1) {
print "#define $e(b) ($bit << (b))\n";
} else {
print "#define $e $bit\n";
}
$bit <<= $bits;
$bitn += $bits;
}
if (length($pfx)) {
print "#define ${pfx}_NUM_BITS $bitn\n";
}
print "\n";
$in_enum = 0;
} else {
$conts .= $_;
}
} else {
if (/^BIT_ENUM\($/) {
$conts = "";
$in_enum = 1;
}
}
}

33
src/common.h
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@ -21,6 +21,8 @@
#include <string.h>
#include <time.h>
#include "common_enum.h"
typedef unsigned char uchar;
typedef unsigned short ushort;
typedef unsigned int uint;
@ -41,6 +43,8 @@ typedef unsigned long ulong;
#define shifted_bit(in, from, to) \
((int)(((uint)(in) / (from > to ? from / to : 1) * (to > from ? to / from : 1)) & to))
#define BIT_ENUM(...)
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
# define ATTR_UNUSED __attribute__((unused))
# define ATTR_NORETURN __attribute__((noreturn))
@ -90,18 +94,23 @@ enum {
VERBOSE,
};
#define DEBUG_CRASH 0x01
#define DEBUG_MAILDIR 0x02
#define DEBUG_NET 0x04
#define DEBUG_NET_ALL 0x08
#define DEBUG_SYNC 0x10
#define DEBUG_MAIN 0x20
#define DEBUG_DRV 0x40
#define DEBUG_DRV_ALL 0x80
#define PROGRESS 0x400
#define KEEPJOURNAL 0x1000
#define ZERODELAY 0x2000
#define FORCEASYNC 0x4000
BIT_ENUM(
DEBUG_MAILDIR,
DEBUG_NET,
DEBUG_NET_ALL,
DEBUG_SYNC,
DEBUG_MAIN,
DEBUG_DRV,
DEBUG_DRV_ALL,
DEBUG_CRASH,
PROGRESS,
ZERODELAY,
KEEPJOURNAL,
FORCEASYNC,
)
#define DEBUG_ANY (DEBUG_MAILDIR | DEBUG_NET | DEBUG_SYNC | DEBUG_MAIN | DEBUG_DRV)
#define DEBUG_ALL (DEBUG_ANY | DEBUG_CRASH)

56
src/driver.h
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@ -9,6 +9,7 @@
#define DRIVER_H
#include "config.h"
#include "driver_enum.h"
typedef struct driver driver_t;
@ -33,26 +34,29 @@ typedef struct store_conf {
/* For message->flags */
// Keep the MESSAGE_FLAGS in sync (grep that)!
/* The order is according to alphabetical maildir flag sort */
#define F_DRAFT (1<<0) /* Draft */
#define F_FLAGGED (1<<1) /* Flagged */
#define F_FORWARDED (1<<2) /* Passed */
#define F_ANSWERED (1<<3) /* Replied */
#define F_SEEN (1<<4) /* Seen */
#define F_DELETED (1<<5) /* Trashed */
#define NUM_FLAGS 6
BIT_ENUM(
F_DRAFT, // Draft
F_FLAGGED, // Flagged
F_FORWARDED, // Passed
F_ANSWERED, // Replied
F_SEEN, // Seen
F_DELETED, // Trashed
)
extern const char MsgFlags[NUM_FLAGS];
extern const char MsgFlags[F__NUM_BITS];
void make_flags( uchar flags, char *buf );
/* For message->status */
#define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
#define M_DEAD (1<<1) /* expunged */
#define M_FLAGS (1<<2) /* flags fetched */
// The following are only for IMAP FETCH response parsing
#define M_DATE (1<<3)
#define M_SIZE (1<<4)
#define M_BODY (1<<5)
#define M_HEADER (1<<6)
BIT_ENUM(
M_RECENT, // unsyncable flag; maildir_*() depend on this being bit 0
M_DEAD, // expunged
M_FLAGS, // flags are valid
// The following are only for IMAP FETCH response parsing
M_DATE,
M_SIZE,
M_BODY,
M_HEADER,
)
#define TUIDL 12
@ -74,15 +78,17 @@ typedef struct message {
// The drivers don't use the first two, but may set them if loading the
// particular range is required to handle some other flag; note that these
// ranges may overlap.
#define OPEN_OLD (1<<0) // Paired messages *in* this store.
#define OPEN_NEW (1<<1) // Messages (possibly) not yet propagated *from* this store.
#define OPEN_FLAGS (1<<2) // Note that fetch_msg() gets the flags regardless.
#define OPEN_NEW_SIZE (1<<4)
#define OPEN_EXPUNGE (1<<5)
#define OPEN_SETFLAGS (1<<6)
#define OPEN_APPEND (1<<7)
#define OPEN_FIND (1<<8)
#define OPEN_OLD_IDS (1<<9)
BIT_ENUM(
OPEN_OLD, // Paired messages *in* this store.
OPEN_NEW, // Messages (possibly) not yet propagated *from* this store.
OPEN_FIND,
OPEN_FLAGS, // Note that fetch_msg() gets the flags regardless.
OPEN_NEW_SIZE,
OPEN_OLD_IDS,
OPEN_APPEND,
OPEN_SETFLAGS,
OPEN_EXPUNGE,
)
#define UIDVAL_BAD ((uint)-1)

2
src/drv_maildir.c
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@ -1565,7 +1565,7 @@ maildir_store_msg( store_t *gctx, msg_data_t *data, int to_trash,
const char *box;
int ret, fd, bl;
uint uid;
char buf[_POSIX_PATH_MAX], nbuf[_POSIX_PATH_MAX], fbuf[NUM_FLAGS + 3], base[128];
char buf[_POSIX_PATH_MAX], nbuf[_POSIX_PATH_MAX], fbuf[as(MsgFlags) + 3], base[128];
bl = nfsnprintf( base, sizeof(base), "%lld.%d_%d.%s", (long long)time( NULL ), Pid, ++MaildirCount, Hostname );
if (!to_trash) {

36
src/sync.c
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@ -6,6 +6,7 @@
*/
#include "sync_p.h"
#include "sync_c_enum.h"
channel_conf_t global_conf;
channel_conf_t *channels;
@ -43,23 +44,24 @@ static int check_cancel( sync_vars_t *svars );
cleanup: close(F) & close(N)
*/
#define ST_LOADED (1<<0)
#define ST_FIND_OLD (1<<1)
#define ST_SENT_NEW (1<<2)
#define ST_FIND_NEW (1<<3)
#define ST_FOUND_NEW (1<<4)
#define ST_SENT_FLAGS (1<<5)
#define ST_SENT_TRASH (1<<6)
#define ST_CLOSED (1<<7)
#define ST_SENT_CANCEL (1<<8)
#define ST_CANCELED (1<<9)
#define ST_SELECTED (1<<10)
#define ST_DID_EXPUNGE (1<<11)
#define ST_CLOSING (1<<12)
#define ST_CONFIRMED (1<<13)
#define ST_PRESENT (1<<14)
#define ST_SENDING_NEW (1<<15)
BIT_ENUM(
ST_PRESENT,
ST_CONFIRMED,
ST_SELECTED,
ST_FIND_OLD,
ST_LOADED,
ST_SENT_FLAGS,
ST_SENDING_NEW,
ST_SENT_NEW,
ST_FIND_NEW,
ST_FOUND_NEW,
ST_SENT_TRASH,
ST_CLOSING,
ST_CLOSED,
ST_DID_EXPUNGE,
ST_SENT_CANCEL,
ST_CANCELED,
)
static uchar
sanitize_flags( uchar tflags, sync_vars_t *svars, int t )

37
src/sync.h
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@ -9,26 +9,31 @@
#define SYNC_H
#include "driver.h"
#include "sync_enum.h"
#define F 0 // far side
#define N 1 // near side
#define OP_NEW (1<<0)
#define OP_RENEW (1<<1)
#define OP_DELETE (1<<2)
#define OP_FLAGS (1<<3)
#define OP_MASK_TYPE (OP_NEW|OP_RENEW|OP_DELETE|OP_FLAGS) /* asserted in the target ops */
#define OP_EXPUNGE (1<<4)
#define OP_CREATE (1<<5)
#define OP_REMOVE (1<<6)
#define XOP_PUSH (1<<8)
#define XOP_PULL (1<<9)
#define XOP_MASK_DIR (XOP_PUSH|XOP_PULL)
#define XOP_HAVE_TYPE (1<<10) // Aka mode; at least one of dir and type
// The following must all have the same bit shift from the corresponding OP_* flags.
#define XOP_HAVE_EXPUNGE (1<<11)
#define XOP_HAVE_CREATE (1<<12)
#define XOP_HAVE_REMOVE (1<<13)
BIT_ENUM(
OP_NEW,
OP_RENEW,
OP_DELETE,
OP_FLAGS,
OP_EXPUNGE,
OP_CREATE,
OP_REMOVE,
XOP_PUSH,
XOP_PULL,
XOP_HAVE_TYPE, // Aka mode; have at least one of dir and type (see below)
// The following must all have the same bit shift from the corresponding OP_* flags.
XOP_HAVE_EXPUNGE,
XOP_HAVE_CREATE,
XOP_HAVE_REMOVE,
)
#define OP_MASK_TYPE (OP_NEW | OP_RENEW | OP_DELETE | OP_FLAGS) // Asserted in the target side ops
#define XOP_MASK_DIR (XOP_PUSH | XOP_PULL)
typedef struct channel_conf {
struct channel_conf *next;

27
src/sync_p.h
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@ -7,23 +7,28 @@
#define DEBUG_FLAG DEBUG_SYNC
#include "sync.h"
#include "sync_p_enum.h"
// This is the (mostly) persistent status of the sync record.
// Most of these bits are actually mutually exclusive. It is a
// bitfield to allow for easy testing for multiple states.
#define S_EXPIRE (1<<0) // the entry is being expired (near side message removal scheduled)
#define S_EXPIRED (1<<1) // the entry is expired (near side message removal confirmed)
#define S_PENDING (1<<2) // the entry is new and awaits propagation (possibly a retry)
#define S_DUMMY(fn) (1<<(3+(fn))) // f/n message is only a placeholder
#define S_SKIPPED (1<<5) // pre-1.4 legacy: the entry was not propagated (message is too big)
#define S_DEAD (1<<7) // ephemeral: the entry was killed and should be ignored
BIT_ENUM(
S_DEAD, // ephemeral: the entry was killed and should be ignored
S_EXPIRE, // the entry is being expired (near side message removal scheduled)
S_EXPIRED, // the entry is expired (near side message removal confirmed)
S_PENDING, // the entry is new and awaits propagation (possibly a retry)
S_DUMMY(2), // f/n message is only a placeholder
S_SKIPPED, // pre-1.4 legacy: the entry was not propagated (message is too big)
)
// Ephemeral working set.
#define W_NEXPIRE (1<<0) // temporary: new expiration state
#define W_DELETE (1<<1) // ephemeral: flags propagation is a deletion
#define W_DEL(fn) (1<<(2+(fn))) // ephemeral: f/n message would be subject to expunge
#define W_UPGRADE (1<<4) // ephemeral: upgrading placeholder, do not apply MaxSize
#define W_PURGE (1<<5) // ephemeral: placeholder is being nuked
BIT_ENUM(
W_NEXPIRE, // temporary: new expiration state
W_DELETE, // ephemeral: flags propagation is a deletion
W_DEL(2), // ephemeral: f/n message would be subject to expunge
W_UPGRADE, // ephemeral: upgrading placeholder, do not apply MaxSize
W_PURGE, // ephemeral: placeholder is being nuked
)
typedef struct sync_rec {
struct sync_rec *next;

2
src/sync_state.c
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@ -13,7 +13,7 @@
#include <errno.h>
#include <sys/stat.h>
#define JOURNAL_VERSION "4"
#define JOURNAL_VERSION "5"
const char *str_fn[] = { "far side", "near side" }, *str_hl[] = { "push", "pull" };