1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/*
@(#)File: $Id: ixblob.ec,v 100.2 2002/02/08 22:49:27 jleffler Exp $
@(#)Based on: ixblob.ec 50.9 1998-10-28 18:42:12
@(#)Purpose: Handle Blobs
@(#)Author: J Leffler
@(#)Copyright: 1996-98 Jonathan Leffler
@(#)Copyright: 2000 Informix Software Inc
@(#)Copyright: 2002 IBM
@(#)Product: IBM Informix Database Driver for Perl Version 2003.04 (2003-03-05)
*/
/*TABSTOP=4*/
/*LINTLIBRARY*/
#include <assert.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
/* Windows 95 and Windows NT fix from Harald Ums <Harald.Ums@sevensys.de> */
#ifdef _WIN32
#include <io.h>
#else
#include <unistd.h>
#endif /* _WIN32 */
#include "ixblob.h"
#ifdef DEBUG
#include "esqlutil.h"
#endif /* DEBUG */
#define FILENAMESIZE 128
#ifndef DEFAULT_TMPDIR
#define DEFAULT_TMPDIR "/tmp"
#endif
static BlobLocn def_blob_locn = BLOB_IN_MEMORY;
#ifndef lint
static const char rcs[] = "@(#)$Id: ixblob.ec,v 100.2 2002/02/08 22:49:27 jleffler Exp $";
#endif
BlobLocn blob_getlocmode(void)
{
return(def_blob_locn);
}
void blob_setlocmode(BlobLocn locn)
{
def_blob_locn = locn;
}
const char *sql_dbtemp(void)
{
static char *db_temp;
if (db_temp == (char *)0)
{
if (((db_temp = getenv("DBTEMP")) == (char *)0) &&
((db_temp = getenv("TMPDIR")) == (char *)0))
db_temp = DEFAULT_TMPDIR;
}
return(db_temp);
}
static int blob_locinnamefile(Blob *blob)
{
char tmp[FILENAMESIZE];
strcpy(tmp, sql_dbtemp());
strcat(tmp, "/blob.XXXXXX");
mktemp(tmp);
/* Cast result of malloc() to placate C++ compilers (eg MSVC) */
blob->loc_fname = (char *)malloc(strlen(tmp) + 1);
if (blob->loc_fname == (char *)0)
return(-1);
strcpy(blob->loc_fname, tmp);
blob->loc_loctype = LOCFNAME;
blob->loc_mode = 0666;
blob->loc_oflags = LOC_WONLY | LOC_RONLY;
blob->loc_size = -1;
blob->loc_indicator = 0;
blob->loc_fd = -1;
#ifdef DEBUG
dump_blob(stderr, "blob_locinnamefile()", blob);
#endif /* DEBUG */
return(0);
}
static int blob_locinanonfile(Blob *blob)
{
char tmp[FILENAMESIZE];
/* Open a file and then delete it, but keep it open. */
/* The system cleans it up regardless of how we exit */
strcpy(tmp, sql_dbtemp());
strcat(tmp, "/blob.XXXXXX");
blob->loc_loctype = LOCFILE;
blob->loc_fname = (char *)0;
blob->loc_mode = 0666;
blob->loc_oflags = LOC_WONLY | LOC_RONLY;
blob->loc_size = -1;
blob->loc_indicator = 0;
mktemp(tmp);
blob->loc_fd = open(tmp, 0666, O_RDWR);
if (blob->loc_fd < 0)
{
return(-1);
}
unlink(tmp);
#ifdef DEBUG
dump_blob(stderr, "blob_locinanonfile()", blob);
#endif /* DEBUG */
return(0);
}
static int blob_locinmem(Blob *blob)
{
/* Use memory only */
blob->loc_loctype = LOCMEMORY;
blob->loc_size = 0;
blob->loc_bufsize = -1;
blob->loc_buffer = (char *)0;
blob->loc_indicator = 0;
blob->loc_oflags = 0;
#ifdef DEBUG
dump_blob(stderr, "blob_locinmem()", blob);
#endif /* DEBUG */
return(0);
}
/*
** Initialise a Blob data structure ready for use.
** Returns: 0 => OK, non-zero => fail
*/
int blob_locate(Blob *blob, BlobLocn locn)
{
int rc;
/**
** JL 2000-03-03: Using memset is a hack; it is not really
** understood why it is necessary, but it seems to avoid some
** problems on NT and with Purify. An alternative to memset would
** create a static variable "static Blob zero_blob = { 0 };" and use
** "*blob = zero_blob;" to initialize the data.
*/
memset(blob, 0, sizeof(Blob));
blob->loc_status = 0;
blob->loc_type = SQLTEXT;
blob->loc_xfercount = 0;
if (locn == BLOB_DEFAULT)
locn = blob_getlocmode();
switch(locn)
{
case BLOB_IN_NAMEFILE:
rc = blob_locinnamefile(blob);
break;
case BLOB_IN_ANONFILE:
rc = blob_locinanonfile(blob);
break;
case BLOB_IN_MEMORY:
rc = blob_locinmem(blob);
break;
case BLOB_DEFAULT:
default:
assert(0);
rc = -1;
break;
}
return(rc);
}
void blob_release(Blob *blob, int dflag)
{
switch (blob->loc_loctype)
{
case LOCFILE:
if (blob->loc_fd >= 0)
close(blob->loc_fd);
blob->loc_fd = -1;
break;
case LOCFNAME:
if (blob->loc_fd >= 0)
close(blob->loc_fd);
blob->loc_fd = -1;
if (blob->loc_fname != (char *)0)
{
if (dflag)
unlink(blob->loc_fname);
free(blob->loc_fname);
blob->loc_fname = 0;
}
break;
case LOCMEMORY:
if (blob->loc_buffer != (char *)0)
free(blob->loc_buffer);
blob->loc_buffer = (char *)0;
blob->loc_bufsize = -1;
blob->loc_mflags = 0;
blob->loc_size = 0;
blob->loc_indicator = 0;
break;
case LOCUSER:
default:
assert(0);
break;
}
}
|
