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Add macros to check if a filename is a WAL segment or other such file.

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We had many instances of the strlen + strspn combination to check for that.
This makes the code a bit easier to read.
This commit is contained in:
Heikki Linnakangas
2015-05-08 21:58:57 +03:00
parent 16c73e773b
commit 179cdd0981
5 changed files with 31 additions and 29 deletions
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18
src/include/access/xlog_internal.h
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@@ -142,6 +142,14 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader;
(uint32) ((logSegNo) / XLogSegmentsPerXLogId), \
(uint32) ((logSegNo) % XLogSegmentsPerXLogId))
#define IsXLogFileName(fname) \
(strlen(fname) == 24 && strspn(fname, "0123456789ABCDEF") == 24)
#define IsPartialXLogFileName(fname) \
(strlen(fname) == 24 + strlen(".partial") && \
strspn(fname, "0123456789ABCDEF") == 24 && \
strcmp((fname) + 24, ".partial") == 0)
#define XLogFromFileName(fname, tli, logSegNo) \
do { \
uint32 log; \
@@ -158,6 +166,11 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader;
#define TLHistoryFileName(fname, tli) \
snprintf(fname, MAXFNAMELEN, "%08X.history", tli)
#define IsTLHistoryFileName(fname) \
(strlen(fname) == 8 + strlen(".history") && \
strspn(fname, "0123456789ABCDEF") == 8 && \
strcmp((fname) + 8, ".history") == 0)
#define TLHistoryFilePath(path, tli) \
snprintf(path, MAXPGPATH, XLOGDIR "/%08X.history", tli)
@@ -169,6 +182,11 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader;
(uint32) ((logSegNo) / XLogSegmentsPerXLogId), \
(uint32) ((logSegNo) % XLogSegmentsPerXLogId), offset)
#define IsBackupHistoryFileName(fname) \
(strlen(fname) > 24 && \
strspn(fname, "0123456789ABCDEF") == 24 && \
strcmp((fname) + strlen(fname) - strlen(".backup"), ".backup") == 0)
#define BackupHistoryFilePath(path, tli, logSegNo, offset) \
snprintf(path, MAXPGPATH, XLOGDIR "/%08X%08X%08X.%08X.backup", tli, \
(uint32) ((logSegNo) / XLogSegmentsPerXLogId), \