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73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/* Database file descriptor structure and file handling routine prototypes.
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*
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* IRC Services is copyright (c) 1996-2009 Andrew Church.
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* E-mail: <achurch@achurch.org>
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* Parts written by Andrew Kempe and others.
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* This program is free but copyrighted software; see the file GPL.txt for
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* details.
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*/
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#ifndef DATABASE_FILEUTIL_H
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#define DATABASE_FILEUTIL_H
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/*************************************************************************/
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typedef struct dbFILE_ dbFILE;
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/* Callers may access fields in this structure directly, but MUST NOT
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* modify them. */
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struct dbFILE_ {
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char mode; /* 'r' for reading, 'w' for writing */
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FILE *fp; /* The file pointer itself */
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char filename[PATH_MAX+1]; /* Name of the database file */
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char tempname[PATH_MAX+1]; /* Name of the temporary file (for writing) */
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};
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/*************************************************************************/
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/* Prototypes and macros: */
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E int32 get_file_version(dbFILE *f);
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E int write_file_version(dbFILE *f, int32 filever);
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E dbFILE *open_db(const char *filename, const char *mode, int32 version);
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E void restore_db(dbFILE *f); /* Restore to state before open_db() */
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E int close_db(dbFILE *f);
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#define read_db(f,buf,len) (fread((buf),1,(len),(f)->fp))
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#define write_db(f,buf,len) (fwrite((buf),1,(len),(f)->fp))
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#define getc_db(f) (fgetc((f)->fp))
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E int read_int8(int8 *ret, dbFILE *f);
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E int read_uint8(uint8 *ret, dbFILE *f);
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E int write_int8(int8 val, dbFILE *f);
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E int read_int16(int16 *ret, dbFILE *f);
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E int read_uint16(uint16 *ret, dbFILE *f);
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E int write_int16(int16 val, dbFILE *f);
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E int read_int32(int32 *ret, dbFILE *f);
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E int read_uint32(uint32 *ret, dbFILE *f);
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E int write_int32(int32 val, dbFILE *f);
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E int read_time(time_t *ret, dbFILE *f);
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E int write_time(time_t val, dbFILE *f);
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E int read_ptr(void **ret, dbFILE *f);
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E int write_ptr(const void *ptr, dbFILE *f);
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E int read_string(char **ret, dbFILE *f);
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E int write_string(const char *s, dbFILE *f);
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#define read_buffer(buf,f) \
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(read_db((f),(buf),sizeof(buf)) == sizeof(buf) ? 0 : -1)
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#define write_buffer(buf,f) \
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(write_db((f),(buf),sizeof(buf)) == sizeof(buf) ? 0 : -1)
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/*************************************************************************/
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#endif /* DATABASE_FILEUTIL_H */
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/*
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* Local variables:
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* c-file-style: "stroustrup"
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* c-file-offsets: ((case-label . *) (statement-case-intro . *))
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* indent-tabs-mode: nil
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* End:
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*
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* vim: expandtab shiftwidth=4:
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*/
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