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fileio.c
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fileio.c
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/*
Copyright (C) 2002-2012, 2014-2024 Free Software Foundation, Inc.
Written by Keisuke Nishida, Roger While, Simon Sobisch, Ron Norman
This file is part of GnuCOBOL.
The GnuCOBOL runtime library is free software: you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
GnuCOBOL is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with GnuCOBOL. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#define _LFS64_LARGEFILE 1
#define _LFS64_STDIO 1
#define _FILE_OFFSET_BITS 64
#define _LARGEFILE64_SOURCE 1
#ifdef _AIX
#define _LARGE_FILES 1
#endif /* _AIX */
#if defined(__hpux__) && !defined(__LP64__)
#define _APP32_64BIT_OFF_T 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <direct.h>
#include <io.h>
#if defined (__WATCOMC__) || defined (__ORANGEC__)
#define fdcobsync fsync
#else
#define fdcobsync _commit
#endif
#if !defined(__BORLANDC__) && !defined(__WATCOMC__) && !defined(__ORANGEC__)
#define getcwd _getcwd
#define chdir _chdir
#define mkdir(path,mode) _mkdir(path)
#define rmdir _rmdir
#define open _open
#define close _close
#define unlink _unlink
#define fdopen _fdopen
#ifndef lseek
#define lseek _lseeki64
#endif
#endif
#ifndef _O_TEMPORARY
#define _O_TEMPORARY 0
#endif
#else /* _WIN32 */
#if defined(HAVE_FDATASYNC)
#if defined(HAVE_DECL_FDATASYNC) && HAVE_DECL_FDATASYNC == 0
/* function available and working, declaration missing on MacOS... */
int fdatasync(int fd);
#endif
#define fdcobsync fdatasync
#else
#define fdcobsync fsync
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#endif /* _WIN32 */
#if defined (COB_EXPERIMENTAL) && defined (HAVE_LOCALE_H)
#include <locale.h>
#endif
#if !defined (EDEADLK) && defined (EDEADLOCK)
#define EDEADLK EDEADLOCK
#endif
#ifdef WITH_DB
#include <db.h>
#elif defined(WITH_CISAM) || defined(WITH_DISAM) || defined(WITH_VBISAM)
#define WITH_ANY_ISAM
#include <signal.h>
#define COB_WITH_STATUS_02
#ifdef WITH_CISAM
#include <isam.h>
#define isfullclose(x) isclose (x)
#define ISRECNUM isrecnum
#define ISERRNO iserrno
#define ISRECLEN isreclen
#endif
#ifdef WITH_DISAM
#ifndef DISAM_NO_ISCONFIG
#include <isconfig.h>
#ifndef ISCOBOL_STATS
#undef COB_WITH_STATUS_02
#endif
#endif
#include <disam.h>
#define isfullclose(x) isclose (x)
#define ISRECNUM isrecnum
#define ISERRNO iserrno
#define ISRECLEN isreclen
#endif
#ifdef WITH_VBISAM
#include <vbisam.h>
/* VB-ISAM does not set dup key status */
#undef COB_WITH_STATUS_02
#if defined(VB_RTD)
/* Since VBISAM 2.1.1: access to isrecnum iserrno etc is no longer global */
static vb_rtd_t *vbisam_rtd = NULL;
#define ISRECNUM vbisam_rtd->isrecnum
#define ISERRNO vbisam_rtd->iserrno
#define ISRECLEN vbisam_rtd->isreclen
#else
#define ISRECNUM isrecnum
#define ISERRNO iserrno
#define ISRECLEN isreclen
#endif
#endif
#endif
/* include internal and external libcob definitions, forcing exports */
#define COB_LIB_EXPIMP
#include "coblocal.h"
#ifdef WITH_ANY_ISAM
/* Isam File handler packet */
struct indexfile {
char *filename; /* ISAM data file name */
char *savekey; /* Area to save last primary key read */
char *recwrk; /* Record work/save area */
size_t nkeys; /* Actual keys in file */
int isfd; /* ISAM file number */
long recnum; /* Last record number read */
long saverecnum; /* isrecnum of next record to process */
int saveerrno; /* savefileposition errno */
int lmode; /* File lock mode for 'isread' */
int startcond; /* Previous 'start' condition value */
int readdir; /* Read direction: ISPREV or ISNEXT */
int lenkey; /* Length of savekey area */
int eofpending; /* End of file pending */
int readdone; /* A 'read' has been successfully done */
int startiscur; /* The 'start' record is current */
int wrkhasrec; /* 'recwrk' holds the next|prev record */
struct keydesc key[1]; /* Table of key information */
/* keydesc is defined in (d|c|vb)isam.h */
};
/* Return total length of the key */
static int
indexed_keylen (const struct keydesc *key)
{
int totlen, part;
totlen = 0;
for (part = 0; part < key->k_nparts; part++) {
totlen += key->k_part[part].kp_leng;
}
return totlen;
}
/* Save key for given index into 'savekey'
Return total length of the key */
static int
indexed_savekey (struct indexfile *fh, unsigned char *data, int idx)
{
const struct keydesc *key = &fh->key[idx];
int totlen = 0;
int part;
if (data == NULL) {
data = (unsigned char*)fh->recwrk;
}
for (part = 0; part < key->k_nparts; part++) {
const struct keypart *k_part = &key->k_part[part];
memcpy (fh->savekey + totlen, data + k_part->kp_start, k_part->kp_leng);
totlen += k_part->kp_leng;
}
return totlen;
}
/* Copy key for given index from 'savekey' back to recwrk
Return total length of the key */
static int
indexed_restorekey (struct indexfile *fh, unsigned char *data, int idx)
{
const struct keydesc *key = &fh->key[idx];
int totlen, part;
totlen = 0;
if (data == NULL) {
data = (unsigned char*)fh->recwrk;
}
for (part = 0; part < key->k_nparts; part++) {
const struct keypart *k_part = &key->k_part[part];
memcpy (data + k_part->kp_start, fh->savekey + totlen, k_part->kp_leng);
totlen += k_part->kp_leng;
}
return totlen;
}
/* Compare key for given index 'savekey' to recwrk
Return compare status */
static int
indexed_cmpkey (struct indexfile *fh, unsigned char *data, int idx, int partlen)
{
const struct keydesc *key = &fh->key[idx];
int sts, part, totlen;
totlen = sts = 0;
if (partlen <= 0) {
partlen = indexed_keylen (key);
}
for (part = 0; part < key->k_nparts && partlen > 0; part++) {
const struct keypart *k_part = &key->k_part[part];
const int cl = partlen > k_part->kp_leng ? k_part->kp_leng : partlen;
sts = memcmp (data + k_part->kp_start, fh->savekey + totlen, cl);
if (sts != 0) {
return sts;
}
totlen += k_part->kp_leng;
partlen -= k_part->kp_leng;
}
return sts;
}
/* Build 'keydesc' from 'cob_file_key'
Return total length of the key */
static int
indexed_keydesc (cob_file *f, struct keydesc *kd, cob_file_key *key)
{
int keylen, part;
memset (kd,0,sizeof (struct keydesc));
kd->k_flags = key->tf_duplicates ? ISDUPS : ISNODUPS;
if (key->count_components < 1) {
/* backward compatibility for not generated components (pre 3.0) */
kd->k_nparts = 1;
kd->k_start = key->offset;
kd->k_leng = key->field->size;
kd->k_type = CHARTYPE;
if (key->tf_suppress) {
#ifdef NULLKEY
kd->k_flags |= NULLKEY;
kd->k_type = CHARTYPE | (key->char_suppress << 8);
#else
#if 0 /* TODO: SUPPRESS string not merged yet */
f->flag_write_chk_dups = 1;
#endif
kd->k_flags = ISDUPS;
#endif
}
keylen = kd->k_leng;
} else {
/* multi- and single field key as component */
/* LCOV_EXCL_START */
if (key->count_components > COB_MAX_KEYCOMP) {
/* not translated as this is safety guard unlikely to be ever triggered */
cob_runtime_warning ("module specifies %d key components, "
"this runtime ignores all parts greater than %d",
key->count_components, COB_MAX_KEYCOMP);
key->count_components = COB_MAX_KEYCOMP;
}
/* LCOV_EXCL_STOP */
keylen = 0;
for (part = 0; part < key->count_components; part++) {
struct keypart *k_part = &kd->k_part[part];
k_part->kp_start = key->component[part]->data - f->record->data;
k_part->kp_leng = key->component[part]->size;
keylen += k_part->kp_leng;
k_part->kp_type = CHARTYPE;
if (key->tf_suppress) {
#ifdef NULLKEY
kd->k_flags |= NULLKEY;
k_part->kp_type = CHARTYPE | (key->char_suppress << 8);
#else
#if 0 /* TODO: SUPPRESS string not merged yet */
f->flag_write_chk_dups = 1;
#endif
kd->k_flags = ISDUPS;
#endif
}
}
kd->k_nparts = part;
}
#if defined(WITH_DISAM) || defined(WITH_VBISAM)
kd->k_len = keylen; /* Total length of this key */
#endif
return keylen;
}
/* Compare 'keydesc' to 'keydesc'
Return 0 if equal, else 1 */
static int
indexed_keycmp (struct keydesc *k1, struct keydesc *k2)
{
int part;
if (k1->k_flags != k2->k_flags
|| k1->k_nparts != k2->k_nparts) {
return 1;
}
for (part = 0; part < k1->k_nparts; part++) {
const struct keypart *k_part1 = &k1->k_part[part];
const struct keypart *k_part2 = &k2->k_part[part];
if (k_part1->kp_start != k_part2->kp_start
|| k_part1->kp_leng != k_part2->kp_leng
|| k_part1->kp_type != k_part2->kp_type) {
return 1;
}
}
return 0;
}
#endif
/* Return index number for given key and set length attributes */
static int
cob_findkey_attr (cob_file *f, cob_field *kf, int *fullkeylen, int *partlen)
{
int k,part;
*fullkeylen = *partlen = 0;
for (k = 0; k < f->nkeys; ++k) {
cob_field *key = f->keys[k].field;
if (key
&& key->data == kf->data
&& f->keys[k].count_components <= 1) {
*fullkeylen = key->size;
*partlen = kf->size;
return k;
}
}
for (k = 0; k < f->nkeys; ++k) {
if (f->keys[k].count_components > 1) {
cob_field *key = f->keys[k].field;
if ((key
&& key->data == kf->data
&& key->size == kf->size)
|| (f->keys[k].component[0]->data == kf->data)) {
for (part = 0; part < f->keys[k].count_components; part++) {
*fullkeylen += f->keys[k].component[part]->size;
}
if (key
&& key->data == kf->data) {
*partlen = key->size;
} else {
*partlen = *fullkeylen;
}
return k;
}
}
}
return -1;
}
/* Define some characters for checking LINE SEQUENTIAL data content */
#define COB_CHAR_CR '\r'
#define COB_CHAR_FF '\f'
#define COB_CHAR_LF '\n'
#define COB_CHAR_SPC ' '
#define COB_CHAR_TAB '\t'
#ifdef COB_EBCDIC_MACHINE
#define COB_CHAR_BS 0x16
#define COB_CHAR_ESC 0x27
#define COB_CHAR_SI 0x0F
#else
#define COB_CHAR_BS 0x08
#define COB_CHAR_ESC 0x1B
#define COB_CHAR_SI 0x0F
#endif
struct file_list {
struct file_list *next;
cob_file *file;
};
#ifdef WORDS_BIGENDIAN
#define COB_MAYSWAP_16(x) ((unsigned short)(x))
#define COB_MAYSWAP_32(x) ((unsigned int)(x))
#else
#define COB_MAYSWAP_16(x) (COB_BSWAP_16((unsigned short)(x)))
#define COB_MAYSWAP_32(x) (COB_BSWAP_32((unsigned int)(x)))
#endif
/* SORT definitions */
#define COBSORTEND 1
#define COBSORTABORT 2
#define COBSORTFILEERR 3
#define COBSORTNOTOPEN 4
/* Sort item */
struct cobitem {
struct cobitem *next;
unsigned char end_of_block;
unsigned char block_byte;
unsigned char unique[sizeof (size_t)];
unsigned char item[1];
};
/* Sort memory chunk */
struct sort_mem_struct {
struct sort_mem_struct *next;
unsigned char *mem_ptr;
};
/* Sort queue structure */
struct queue_struct {
struct cobitem *first;
struct cobitem *last;
size_t count;
};
/* Sort temporary file structure */
struct file_struct {
FILE *fp;
size_t count; /* Count of blocks in temporary files */
};
/* Sort base structure */
struct cobsort {
void *pointer;
struct cobitem *empty;
void *sort_return;
cob_field *fnstatus;
struct sort_mem_struct *mem_base;
size_t unique;
size_t size;
size_t alloc_size;
size_t mem_size;
size_t mem_used;
size_t mem_total;
size_t chunk_size;
size_t r_size;
size_t w_size;
size_t switch_to_file;
unsigned int retrieving;
unsigned int files_used;
int destination_file;
int retrieval_queue;
struct queue_struct queue[4];
struct file_struct file[4];
int flag_merge;
};
/* End SORT definitions */
/* Local variables */
static cob_global *cobglobptr = NULL;
static cob_settings *cobsetptr = NULL;
static unsigned int eop_status = 0;
static unsigned int check_eop_status = 0;
static int cob_vsq_len = 0;
static int last_operation_open = 0;
static struct file_list *file_cache = NULL;
static char *file_open_env = NULL;
static char *file_open_name = NULL;
static char *file_open_buff = NULL;
static char *runtime_buffer = NULL;
static const int status_exception[] = {
0, /* 0x */
COB_EC_I_O_AT_END, /* 1x */
COB_EC_I_O_INVALID_KEY, /* 2x */
COB_EC_I_O_PERMANENT_ERROR, /* 3x */
COB_EC_I_O_LOGIC_ERROR, /* 4x */
COB_EC_I_O_RECORD_OPERATION, /* 5x */
COB_EC_I_O_FILE_SHARING, /* 6x */
COB_EC_I_O_RECORD_CONTENT, /* 7x, currently unused */
COB_EC_I_O, /* Unused */
COB_EC_I_O_IMP /* 9x */
};
static const char * const prefix[] = { "DD_", "dd_", "" };
#define NUM_PREFIX sizeof (prefix) / sizeof (char *)
static int dummy_delete (cob_file *);
#if 0 /* not needed any more */
static int dummy_rnxt_rewrite (cob_file *, const int);
#endif
static int dummy_read (cob_file *, cob_field *, const int);
static int dummy_start (cob_file *, const int, cob_field *);
static int cob_file_open (cob_file *, char *, const enum cob_open_mode, const int);
static int cob_file_close (cob_file *, const int);
static int cob_savekey (cob_file *f, int idx, unsigned char *data);
static int cob_file_write_opt (cob_file *, const int);
static int sequential_read (cob_file *, const int);
static int set_sequential_variable_length (cob_file *);
static int sequential_write (cob_file *, const int);
static int sequential_rewrite (cob_file *, const int);
static int lineseq_read (cob_file *, const int);
static int lineseq_write (cob_file *, const int);
static int lineseq_rewrite (cob_file *, const int);
static int relative_start (cob_file *, const int, cob_field *);
static int relative_read (cob_file *, cob_field *, const int);
static int relative_read_next (cob_file *, const int);
static int relative_write (cob_file *, const int);
static int relative_rewrite (cob_file *, const int);
static int relative_delete (cob_file *);
static int indexed_open (cob_file *, char *, const enum cob_open_mode, const int);
static int indexed_close (cob_file *, const int);
static int indexed_start (cob_file *, const int, cob_field *);
static int indexed_read (cob_file *, cob_field *, const int);
static int indexed_read_next (cob_file *, const int);
static int indexed_write (cob_file *, const int);
static int indexed_delete (cob_file *);
static int indexed_rewrite (cob_file *, const int);
static const struct cob_fileio_funcs indexed_funcs = {
indexed_open,
indexed_close,
indexed_start,
indexed_read,
indexed_read_next,
indexed_write,
indexed_rewrite,
indexed_delete
};
static const struct cob_fileio_funcs sequential_funcs = {
cob_file_open,
cob_file_close,
dummy_start,
dummy_read,
sequential_read,
sequential_write,
sequential_rewrite,
dummy_delete
};
static const struct cob_fileio_funcs lineseq_funcs = {
cob_file_open,
cob_file_close,
dummy_start,
dummy_read,
lineseq_read,
lineseq_write,
lineseq_rewrite,
dummy_delete
};
static const struct cob_fileio_funcs relative_funcs = {
cob_file_open,
cob_file_close,
relative_start,
relative_read,
relative_read_next,
relative_write,
relative_rewrite,
relative_delete
};
static const struct cob_fileio_funcs *fileio_funcs[COB_ORG_MAX] = {
&sequential_funcs,
&lineseq_funcs,
&relative_funcs,
&indexed_funcs,
NULL
};
#if defined(WITH_INDEX_EXTFH) || defined(WITH_SEQRA_EXTFH)
extern void extfh_cob_init_fileio (const struct cob_fileio_funcs *,
const struct cob_fileio_funcs *,
const struct cob_fileio_funcs *,
int (*)(cob_file *, const int));
extern void extfh_cob_exit_fileio (void);
#endif
#ifdef WITH_INDEX_EXTFH
extern void extfh_indexed_unlock (cob_file *);
extern int extfh_indexed_locate (cob_file *, char *);
extern int extfh_indexed_open (cob_file *, char *, const int, const int);
extern int extfh_indexed_close (cob_file *, const int);
extern int extfh_indexed_start (cob_file *, const int, cob_field *);
extern int extfh_indexed_read (cob_file *, cob_field *, const int);
extern int extfh_indexed_read_next (cob_file *, const int);
extern int extfh_indexed_write (cob_file *, const int);
extern int extfh_indexed_delete (cob_file *);
extern int extfh_indexed_rewrite (cob_file *, const int);
#endif
#ifdef WITH_SEQRA_EXTFH
extern void extfh_seqra_unlock (cob_file *);
extern int extfh_seqra_locate (cob_file *, char *);
extern int extfh_cob_file_open (cob_file *, char *, const int, const int);
extern int extfh_cob_file_close (cob_file *, const int);
extern int extfh_sequential_read (cob_file *, const int);
extern int extfh_sequential_write (cob_file *, const int);
extern int extfh_sequential_rewrite (cob_file *, const int);
extern int extfh_relative_start (cob_file *, const int, cob_field *);
extern int extfh_relative_read (cob_file *, cob_field *, const int);
extern int extfh_relative_read_next (cob_file *, const int);
extern int extfh_relative_write (cob_file *, const int);
extern int extfh_relative_rewrite (cob_file *, const int);
extern int extfh_relative_delete (cob_file *);
#endif
static void cob_file_fcd_sync (cob_file *);
static void cob_fcd_file_sync (cob_file *, char *);
static void free_extfh_fcd (void);
#ifdef WITH_DB
static DB_ENV *bdb_env = NULL;
static char *bdb_buff = NULL;
static const char **bdb_data_dir = NULL;
static void *record_lock_object = NULL;
static size_t rlo_size = 0;
static unsigned int bdb_lock_id = 0;
#define DB_PUT(db,key,data,flags) db->put (db, NULL, key, data, flags)
#define DB_GET(db,key,data,flags) db->get (db, NULL, key, data, flags)
#if (DB_VERSION_MAJOR > 4) || ((DB_VERSION_MAJOR == 4) && (DB_VERSION_MINOR > 6))
#define DB_SEQ(db,key,data,flags) db->get (db, key, data, flags)
#define DB_CPUT(db,key,data,flags) db->put (db, key, data, flags)
#define DB_CDEL(db,flags) db->del (db, flags)
#else
#define DB_SEQ(db,key,data,flags) db->c_get (db, key, data, flags)
#define DB_CPUT(db,key,data,flags) db->c_put (db, key, data, flags)
#define DB_CDEL(db,flags) db->c_del (db, flags)
#endif
#define DB_DEL(db,key,flags) db->del (db, NULL, key, flags)
#define DB_CLOSE(db) db->close (db, 0)
#define DB_SYNC(db) db->sync (db, 0)
#define cob_dbtsize_t u_int32_t
#if defined(WORDS_BIGENDIAN)
/* Big Endian then leave 'int' alone */
#define COB_DUPSWAP(x) ((unsigned int)(x))
#elif defined(COB_BDB_BAD_DUPNO) || 1 /* FIXME: may be added to a file specific flag */
/* Want to retain incorrect storing of Little Endian value backwards */
#define COB_DUPSWAP(x) ((unsigned int)(x))
#else
/* Little Endian so swap byte around to have dupno value stored in bigendian sequence */
#define COB_DUPSWAP(x) (COB_BSWAP_32((unsigned int)(x)))
#endif
#define DBT_SET(key,fld) \
key.data = fld->data; \
key.size = (cob_dbtsize_t) fld->size
#if (DB_VERSION_MAJOR > 4) || ((DB_VERSION_MAJOR == 4) && (DB_VERSION_MINOR > 0))
#define DBT_SET_APP_DATA(key,data) ((key)->app_data = (data))
#define DBT_GET_APP_DATA(key) ((key)->app_data)
#else
/* Workaround for older BDB versions that do not have app_data in DBT */
static void *bdb_app_data = NULL;
#define DBT_SET_APP_DATA(key,data) ((void)(key), bdb_app_data = (data))
#define DBT_GET_APP_DATA(key) ((void)(key), bdb_app_data)
#endif
struct indexed_file {
DB **db; /* Database handlers */
DBC **cursor;
char *filename; /* Needed for record locks */
unsigned char *last_key; /* The last key written */
unsigned char *temp_key; /* Used for temporary storage */
unsigned char **last_readkey; /* The last key read */
unsigned int *last_dupno; /* The last number of duplicates read */
int *rewrite_sec_key;
int maxkeylen;
int primekeylen;
unsigned char *savekey; /* Work area for saving key value */
unsigned char *suppkey; /* Work area for saving key value */
unsigned char *saverec; /* For saving copy of record */
int key_index;
unsigned int bdb_lock_id;
int write_cursor_open;
int record_locked;
int filenamelen;
int file_lock_set;
DBT key;
DBT data;
DB_LOCK bdb_file_lock;
DB_LOCK bdb_record_lock;
};
/* collation aware key comparision,
currently only used for BDB, likely used in general later */
static int
indexed_key_compare (const unsigned char *k1, const unsigned char *k2,
size_t sz, const unsigned char *col)
{
if (col) {
return cob_cmps (k1, k2, sz, col);
}
return memcmp (k1, k2, sz);
}
/* Return total length of the key */
static int
bdb_keylen (cob_file *f, int idx)
{
int totlen, part;
if (idx < 0 || idx > f->nkeys) {
return -1;
}
if (f->keys[idx].count_components > 0) {
totlen = 0;
for (part = 0; part < f->keys[idx].count_components; part++) {
totlen += f->keys[idx].component[part]->size;
}
return totlen;
}
return f->keys[idx].field->size;
}
/* Save key for given index from 'record' into 'keyarea',
returns total length of the key */
static int
bdb_savekey (cob_file *f, unsigned char *keyarea, unsigned char *record, int idx)
{
int totlen, part;
if (f->keys[idx].count_components > 0) {
totlen = 0;
for (part = 0; part < f->keys[idx].count_components; part++) {
memcpy (keyarea + totlen,
record + (f->keys[idx].component[part]->data - f->record->data),
f->keys[idx].component[part]->size);
totlen += f->keys[idx].component[part]->size;
}
return totlen;
}
memcpy (keyarea, record + f->keys[idx].offset, f->keys[idx].field->size);
return (int)f->keys[idx].field->size;
}
static COB_INLINE void
bdb_setkeycol (cob_file *f, int idx)
{
struct indexed_file *p = f->file;
DBT_SET_APP_DATA(&p->key, (void *)f->keys[idx].collating_sequence);
}
static void
bdb_setkey (cob_file *f, int idx)
{
struct indexed_file *p = f->file;
int len;
memset (p->savekey, 0, p->maxkeylen);
len = bdb_savekey (f, p->savekey, f->record->data, idx);
p->key.data = p->savekey;
p->key.size = (cob_dbtsize_t) len;
bdb_setkeycol (f, idx);
}
/* Compare key for given index 'keyarea' to 'record'.
returns compare status */
static int
bdb_cmpkey (cob_file *f, unsigned char *keyarea, unsigned char *record, int idx, int partlen)
{
int sts, part, totlen;
size_t cl;
if (partlen <= 0) {
partlen = bdb_keylen(f, idx);
/* LCOV_EXCL_START */
if (partlen <= 0) {
cob_runtime_error (_("invalid internal call of %s"), "bdb_cmpkey");
cob_hard_failure_internal ("libcob");
}
/* LCOV_EXCL_STOP */
}
if (f->keys[idx].count_components > 0) {
totlen = 0;
for (part = 0; part < f->keys[idx].count_components && partlen > 0; part++) {
cl = partlen > f->keys[idx].component[part]->size ? f->keys[idx].component[part]->size : partlen;
sts = memcmp (keyarea + totlen,
record + (f->keys[idx].component[part]->data - f->record->data),
cl);
if (sts != 0) {
return sts;
}
totlen += f->keys[idx].component[part]->size;
partlen -= f->keys[idx].component[part]->size;
}
return 0;
}
cl = partlen > f->keys[idx].field->size ? f->keys[idx].field->size : partlen;
return memcmp (keyarea, record + f->keys[idx].offset, cl);
}
/* Is given key data all SUPPRESS char,
returns 1 if key has all SUPPRESS char */
static int
bdb_suppresskey (cob_file *f, int idx)
{
unsigned char ch_sprs;
int i,len;
struct indexed_file *p = f->file;
if (!f->keys[idx].tf_suppress) {
return 0;
}
ch_sprs = f->keys[idx].char_suppress & 0xFF;
len = bdb_savekey(f, p->suppkey, f->record->data, idx);
for (i = 0; i < len; i++) {
if (p->suppkey[i] != ch_sprs)
return 0;
}
return 1;
}
/* Open the 'write cursor' if needed and return 0 is already open */
static int
bdb_open_cursor (cob_file *f, int for_write)
{
struct indexed_file *p = f->file;
int flags;
if (p->write_cursor_open) {
return 0; /* It is already open */
}
if (bdb_env && for_write) {
flags = DB_WRITECURSOR;
} else {
flags = 0;
}
p->db[0]->cursor (p->db[0], NULL, &p->cursor[0], flags);
p->write_cursor_open = 1;
return 1;
}
/* Close the 'write cursor' if needed and return 0 is already closed */
static int
bdb_close_cursor (cob_file *f)
{
struct indexed_file *p = f->file;
p->write_cursor_open = 0;
if (p->cursor[0] == NULL) {
return 0; /* It is already closed */
}
#if (DB_VERSION_MAJOR > 4) || ((DB_VERSION_MAJOR == 4) && (DB_VERSION_MINOR > 6))
p->cursor[0]->close (p->cursor[0]);
#else
p->cursor[0]->c_close (p->cursor[0]);
#endif
p->cursor[0] = NULL;
return 1;
}
/* Close the 'cursor' on a specific index */
static int
bdb_close_index (cob_file *f, int index)
{
struct indexed_file *p = f->file;
if (p->cursor[index] == NULL) {
return 0; /* It is already closed */
}
#if (DB_VERSION_MAJOR > 4) || ((DB_VERSION_MAJOR == 4) && (DB_VERSION_MINOR > 6))
p->cursor[index]->close (p->cursor[index]);
#else
p->cursor[index]->c_close (p->cursor[index]);
#endif
p->cursor[index] = NULL;
return 1;
}
static int
bdb_bt_compare (DB *db, const DBT *k1, const DBT *k2
#if DB_VERSION_MAJOR >= 6 /* ABI break in DB_VERSION_FAMILY 12 ... */
, size_t *locp
#endif
)
{
const unsigned char *col = (unsigned char *)DBT_GET_APP_DATA (k1);
COB_UNUSED (db);
/* LCOV_EXCL_START */
if (col == NULL) {
cob_runtime_error ("bdb_bt_compare was set but no collating sequence was stored in DBT");
}
if (k1->size != k2->size) {
cob_runtime_error ("bdb_bt_compare was given keys of different length");
}
/* LCOV_EXCL_STOP */
#if DB_VERSION_MAJOR >= 6
locp = NULL; /* docs: must be set to NULL or corruption can occur ... */
#endif
return indexed_key_compare (k1->data, k2->data, k2->size, col);
}
#endif /* WITH_DB */
/* Local functions */
static int
dummy_delete (cob_file *f)
{
COB_UNUSED (f);
return COB_STATUS_91_NOT_AVAILABLE;
}
#if 0 /* not needed any more */
static int
dummy_rnxt_rewrite (cob_file *f, const int opt)
{
COB_UNUSED (f);
COB_UNUSED (opt);
return COB_STATUS_91_NOT_AVAILABLE;
}
#endif
static int
dummy_read (cob_file *f, cob_field *key, const int read_opts)
{
COB_UNUSED (f);
COB_UNUSED (key);
COB_UNUSED (read_opts);
return COB_STATUS_91_NOT_AVAILABLE;
}
static int
dummy_start (cob_file *f, const int cond, cob_field *key)
{
COB_UNUSED (f);
COB_UNUSED (cond);
COB_UNUSED (key);
return COB_STATUS_91_NOT_AVAILABLE;
}
/* Check for DD_xx, dd_xx, xx environment variables for a filename
or a part specified with 'src';
returns either the value or NULL if not found in the environment
Note: MF only checks for xx if the variable started with a $,
ACUCOBOL only checks for xx in general ... */
static char *
cob_chk_file_env (const char *src)
{
char *p;
char *q;
char *s;
size_t i;
/* GC-sanity rule: no environment handling if src starts with period */
if (*src == '.') {
return NULL;
}
/* no mapping if filename begins with a slash [externally checked], hyphen or digits