/* * sdbm - ndbm work-alike hashed database library * based on Per-Ake Larson's Dynamic Hashing algorithms. BIT 18 (1978). * author: oz@nexus.yorku.ca * status: public domain. */ #define DBLKSIZ 4096 #define PBLKSIZ 1024 #define PAIRMAX 1008 /* arbitrary on PBLKSIZ-N */ #define SPLTMAX 10 /* maximum allowed splits */ /* for a single insertion */ #ifdef VMS #define DIRFEXT ".sdbm_dir" #else #define DIRFEXT ".dir" #endif #define PAGFEXT ".pag" typedef struct { int dirf; /* directory file descriptor */ int pagf; /* page file descriptor */ int flags; /* status/error flags, see below */ long maxbno; /* size of dirfile in bits */ long curbit; /* current bit number */ long hmask; /* current hash mask */ long blkptr; /* current block for nextkey */ int keyptr; /* current key for nextkey */ long blkno; /* current page to read/write */ long pagbno; /* current page in pagbuf */ char pagbuf[PBLKSIZ]; /* page file block buffer */ long dirbno; /* current block in dirbuf */ char dirbuf[DBLKSIZ]; /* directory file block buffer */ } DBM; #define DBM_RDONLY 0x1 /* data base open read-only */ #define DBM_IOERR 0x2 /* data base I/O error */ /* * utility macros */ #define sdbm_rdonly(db) ((db)->flags & DBM_RDONLY) #define sdbm_error(db) ((db)->flags & DBM_IOERR) #define sdbm_clearerr(db) ((db)->flags &= ~DBM_IOERR) /* ouch */ #define sdbm_dirfno(db) ((db)->dirf) #define sdbm_pagfno(db) ((db)->pagf) typedef struct { char *dptr; int dsize; } datum; EXTCONST datum nullitem #ifdef DOINIT = {0, 0} #endif ; #if defined(__STDC__) || defined(__cplusplus) || defined(CAN_PROTOTYPE) #define proto(p) p #else #define proto(p) () #endif /* * flags to sdbm_store */ #define DBM_INSERT 0 #define DBM_REPLACE 1 /* * ndbm interface */ extern DBM *sdbm_open proto((char *, int, int)); extern void sdbm_close proto((DBM *)); extern datum sdbm_fetch proto((DBM *, datum)); extern int sdbm_delete proto((DBM *, datum)); extern int sdbm_store proto((DBM *, datum, datum, int)); extern datum sdbm_firstkey proto((DBM *)); extern datum sdbm_nextkey proto((DBM *)); extern int sdbm_exists proto((DBM *, datum)); /* * other */ extern DBM *sdbm_prep proto((char *, char *, int, int)); extern long sdbm_hash proto((char *, int)); #ifndef SDBM_ONLY #define dbm_open sdbm_open #define dbm_close sdbm_close #define dbm_fetch sdbm_fetch #define dbm_store sdbm_store #define dbm_delete sdbm_delete #define dbm_firstkey sdbm_firstkey #define dbm_nextkey sdbm_nextkey #define dbm_error sdbm_error #define dbm_clearerr sdbm_clearerr #endif /* Most of the following is stolen from perl.h. We don't include perl.h here because we just want the portability parts of perl.h, not everything else. */ #ifndef H_PERL /* Include guard */ #include "embed.h" /* Follow all the global renamings. */ /* * The following contortions are brought to you on behalf of all the * standards, semi-standards, de facto standards, not-so-de-facto standards * of the world, as well as all the other botches anyone ever thought of. * The basic theory is that if we work hard enough here, the rest of the * code can be a lot prettier. Well, so much for theory. Sorry, Henry... */ #include #ifdef HAS_SOCKET # ifdef I_NET_ERRNO # include # endif #endif #if defined(__STDC__) || defined(_AIX) || defined(__stdc__) || defined(__cplusplus) # define STANDARD_C 1 #endif #include #include #include #if defined(I_UNISTD) #include #endif #ifdef VMS # include # include #endif #ifdef I_SYS_PARAM # if !defined(MSDOS) && !defined(WIN32) && !defined(VMS) # ifdef PARAM_NEEDS_TYPES # include # endif # include # endif #endif #ifndef _TYPES_ /* If types.h defines this it's easy. */ # ifndef major /* Does everyone's types.h define this? */ # include # endif #endif #include #ifndef SEEK_SET # ifdef L_SET # define SEEK_SET L_SET # else # define SEEK_SET 0 /* Wild guess. */ # endif #endif /* Use all the "standard" definitions? */ #if defined(STANDARD_C) && defined(I_STDLIB) # include #endif /* STANDARD_C */ #define MEM_SIZE Size_t /* This comes after so we don't try to change the standard * library prototypes; we'll use our own instead. */ #if defined(MYMALLOC) && !defined(PERL_POLLUTE_MALLOC) # define malloc Perl_malloc # define calloc Perl_calloc # define realloc Perl_realloc # define free Perl_mfree Malloc_t Perl_malloc proto((MEM_SIZE nbytes)); Malloc_t Perl_calloc proto((MEM_SIZE elements, MEM_SIZE size)); Malloc_t Perl_realloc proto((Malloc_t where, MEM_SIZE nbytes)); Free_t Perl_mfree proto((Malloc_t where)); #endif /* MYMALLOC */ #ifdef I_STRING # ifndef __ultrix__ # include # endif #else # include #endif #ifdef I_MEMORY #include #endif #ifdef __cplusplus #define HAS_MEMCPY #endif #ifdef HAS_MEMCPY # if !defined(STANDARD_C) && !defined(I_STRING) && !defined(I_MEMORY) # ifndef memcpy extern char * memcpy proto((char*, char*, int)); # endif # endif #else # ifndef memcpy # ifdef HAS_BCOPY # define memcpy(d,s,l) bcopy(s,d,l) # else # define memcpy(d,s,l) my_bcopy(s,d,l) # endif # endif #endif /* HAS_MEMCPY */ #ifdef HAS_MEMSET # if !defined(STANDARD_C) && !defined(I_STRING) && !defined(I_MEMORY) # ifndef memset extern char *memset proto((char*, int, int)); # endif # endif # define memzero(d,l) memset(d,0,l) #else # ifndef memzero # ifdef HAS_BZERO # define memzero(d,l) bzero(d,l) # else # define memzero(d,l) my_bzero(d,l) # endif # endif #endif /* HAS_MEMSET */ #if defined(mips) && defined(ultrix) && !defined(__STDC__) # undef HAS_MEMCMP #endif #if defined(HAS_MEMCMP) && defined(HAS_SANE_MEMCMP) # if !defined(STANDARD_C) && !defined(I_STRING) && !defined(I_MEMORY) # ifndef memcmp extern int memcmp proto((char*, char*, int)); # endif # endif # ifdef BUGGY_MSC # pragma function(memcmp) # endif #else # ifndef memcmp /* maybe we should have included the full embedding header... */ # ifdef NO_EMBED # define memcmp my_memcmp # else # define memcmp Perl_my_memcmp # endif #ifndef __cplusplus extern int memcmp proto((char*, char*, int)); #endif # endif #endif /* HAS_MEMCMP */ #ifndef HAS_BCMP # ifndef bcmp # define bcmp(s1,s2,l) memcmp(s1,s2,l) # endif #endif /* !HAS_BCMP */ #ifdef HAS_MEMCMP # define memNE(s1,s2,l) (memcmp(s1,s2,l)) # define memEQ(s1,s2,l) (!memcmp(s1,s2,l)) #else # define memNE(s1,s2,l) (bcmp(s1,s2,l)) # define memEQ(s1,s2,l) (!bcmp(s1,s2,l)) #endif #ifdef I_NETINET_IN # ifdef VMS # include # else # include # endif #endif #endif /* Include guard */