/* Copyright (c) 2004 GPL mmc Mike Chirico mchirico@users.sourceforge.net
http://prdownloads.sourceforge.net/cpearls/sqlite_examples.tar.gz?download
Updated: Tue Sep 21 11:47:21 EDT 2004
Compile:
gcc -o eatblob eatblob.c -lsqlite3
Usage:
You can interactively execute the following (arrows ">" represent the
output from the program)
$ ./eatblob test3.db test.png
create table test (a varchar(50), b blob);
>Total Changes 0
insert into test (a,b) values ('test',?);
>Total Changes 1
select a,b from test;
>IN BLOB bytes 5552
>test
>Total Changes 1
^D
Or, put all the sql commands in the file "sqlcommands", ';' delimited so
that you have the following:
$ cat sqlcommands
create table blobtest (des varchar(80),b blob);
insert into blobtest (des,b)
values ('A test file: test.png',?);
select * from blobtest;
Then, run eatblob as follows:
$ ./eatblob test3.db test.png < sqlcommands
Or, do everything on the command prompt
$ ./eatblob test3.db test.png "create table blobtest (des varchar(80),b blob);"
$ ./eatblob test3.db test.png "insert into blobtest (des,b) values ('A test file: test.png',?);"
Thanks to Steven R. <stevenr@columbus.rr.com> for fixing the addmem routine. This
program should match the documentation at
http://souptonuts.sourceforge.net/readme_sqlite_tutorial.html
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <sqlite3.h>
#define STMLEN 1024
extern int errno;
#define MULT_START 16384
#define MULT_INCREMENT 2
#define INIT_SIZE 1024
long memindx = MULT_START;
long memnext;
ssize_t mygetline(char **lineptr, size_t * n, FILE * stream)
{
ssize_t mread;
char *line = NULL;
char *head = NULL;
line = *lineptr;
if ((mread = getline(&line, n, stream)) > 0) {
head = line;
line = line + mread - 1;
if (head[0] == '\n') {
*lineptr = head;
return mread;
}
if (head[0] == '.' && head[1] == 'q') {
return -1;
}
if (head[0] == '.' && head[1] == 'e') {
return -1;
}
if (strcspn(head, ";") < (size_t) mread) {
*lineptr = head;
return mread;
}
if ((mread = getdelim(&line, n, ';', stream)) < 0) {
fprintf(stderr, "ERROR in mygetline getdelm \n");
}
}
*lineptr = head;
return mread;
}
long addmem(char **buf, long size)
{
memnext = (size > 0) ? size + memindx : INIT_SIZE;
memindx = memindx * MULT_INCREMENT;
char *tbuf = realloc(*buf, memnext);
if (tbuf == NULL) {
fprintf(stderr, "Can't allocate memory in addmem\n");
return size;
} else {
*buf = tbuf;
return memnext;
}
}
int print_col(sqlite3_stmt * pTableInfo, int col)
{
int fd;
static int ct = 0;
char outfile[50];
switch (sqlite3_column_type(pTableInfo, col)) {
case SQLITE_INTEGER:
printf("%d ", sqlite3_column_int(pTableInfo, col));
break;
case SQLITE_FLOAT:
printf("%f ", sqlite3_column_double(pTableInfo, col));
break;
case SQLITE_TEXT:
printf("%s ", sqlite3_column_text(pTableInfo, col));
break;
case SQLITE_BLOB: //printf("%s",sqlite3_column_blob(pTableInfo, col));
/* fprintf(stderr, "IN BLOB bytes %d\n",
sqlite3_column_bytes(pTableInfo, col)); */
snprintf(outfile, 20, "outdata.%d.png", ct++);
if ((fd = open(outfile, O_RDWR | O_CREAT, 0600)) == -1) {
fprintf(stderr, "Can't open data: %s\n",
strerror(errno));
return 1;
}
write(fd, sqlite3_column_blob(pTableInfo, col),
sqlite3_column_bytes(pTableInfo, col));
close(fd);
break;
case SQLITE_NULL:
printf("Null ");
break;
default:
printf(" *Cannot determine SQLITE TYPE* col=%d ", col);
}
return 0;
}
int main(int argc, char **argv)
{
sqlite3 *db;
sqlite3_stmt *plineInfo = 0;
char *line = NULL;
size_t len = 0;
ssize_t mread;
int fd, n;
long buflen = 0, totread = 0;
char *buf = NULL, *pbuf = NULL;
// char *zErrMsg = 0;
int rc, i;
if (argc < 3) {
fprintf(stderr,
"Usage: %s <DATABASE> <BINARYFILE> < sqlcommands \n\n"
"Or, the following:\n\n"
" $%s test3.db test.png \n"
" eatblob:0> create table blobtest (des varchar(80), b blob);\n"
" eatblob:0> insert into blobtest (des,b) values ('A test file: test.png',?);\n"
" eatblob:1> select * from blobtest;\n"
" A test file: test.png\n"
" eatblob:1>\n\n"
" Note output.0.png will contain a copy of test.png\n\n"
"Or, do everything on the command prompt:\n\n"
" $ ./eatblob test3.db test.png \"create table blobtest (des varchar(80),b blob);\"\n"
" $ ./eatblob test3.db test.png \"insert into blobtest (des,b) values ('A test file: test.png',?);\"\n"
"\n\n",
argv[0], argv[0]);
exit(1);
}
if (sqlite3_open(argv[1], &db) != SQLITE_OK) {
fprintf(stderr, "Can't open database: \n");
sqlite3_close(db);
exit(1);
}
if ((fd = open(argv[2], O_RDWR | O_CREAT, 0600)) == -1) {
fprintf(stderr, "Can't open data: %s\n", strerror(errno));
return 1;
}
while (buflen - totread - 1 < 1024)
buflen = addmem(&buf, buflen);
pbuf = buf;
totread = 0;
while ((n = read(fd, pbuf, 1024)) > 0) {
totread += n;
pbuf[n] = '\0'; // This is for printing test
while (buflen - totread - 1 < 1024)
buflen = addmem(&buf, buflen);
pbuf = &buf[totread];
}
close(fd);
if (argc == 4) {
rc = sqlite3_prepare(db, argv[3], -1, &plineInfo, 0);
if (rc == SQLITE_OK && plineInfo != NULL) {
//fprintf(stderr, "SQLITE_OK\n");
sqlite3_bind_blob(plineInfo, 1, buf, totread,
free);
while ((rc =
sqlite3_step(plineInfo)) == SQLITE_ROW) {
//
for (i = 0;
i < sqlite3_column_count(plineInfo);
++i)
print_col(plineInfo, i);
printf("\n");
}
rc = sqlite3_finalize(plineInfo);
}
fprintf(stderr, "eatblob:%d> ", sqlite3_total_changes(db));
} else {
fprintf(stderr, "eatblob:0> ");
while ((mread = mygetline(&line, &len, stdin)) > 0) {
rc = sqlite3_prepare(db, line, -1, &plineInfo, 0);
if (rc == SQLITE_OK && plineInfo != NULL) {
//fprintf(stderr, "SQLITE_OK\n");
sqlite3_bind_blob(plineInfo, 1, buf,
totread, free);
while ((rc =
sqlite3_step(plineInfo)) ==
SQLITE_ROW) {
//
for (i = 0;
i <
sqlite3_column_count
(plineInfo); ++i)
print_col(plineInfo, i);
printf("\n");
}
rc = sqlite3_finalize(plineInfo);
}
fprintf(stderr, "eatblob:%d> ",
sqlite3_total_changes(db));
} /* end of while */
}
if (line) {
free(line);
}
sqlite3_close(db);
return 0;
}
/* LocalWords: sql
*/
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Mike Chirico, a father of triplets (all girls) lives outside of
Philadelphia, PA, USA. He has worked with Linux since 1996, has a Masters
in Computer Science and Mathematics from Villanova University, and has
worked in computer-related jobs from Wall Street to the University of
Pennsylvania. His hero is Paul Erdos, a brilliant number theorist who was
known for his open collaboration with others.
Mike's notes page is souptonuts. For
open source consulting needs, please send an email to
mchirico@gmail.com. All consulting work must include a donation to
SourceForge.net.
