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Enhance the built-in function quote() to support blob values. (CVS 1541)

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FossilOrigin-Name: 97aa54bb70715934e0af082d51b9b0f6bb847e8e
This commit is contained in:
danielk1977
2004-06-08 00:39:01 +00:00
parent 4f057f904a
commit 3f41e976e8
4 changed files with 38 additions and 89 deletions
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81
src/shell.c
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@@ -12,7 +12,7 @@
** This file contains code to implement the "sqlite" command line
** utility for accessing SQLite databases.
**
** $Id: shell.c,v 1.103 2004/06/08 00:02:34 danielk1977 Exp $
** $Id: shell.c,v 1.104 2004/06/08 00:39:01 danielk1977 Exp $
*/
#include <stdlib.h>
#include <string.h>
@@ -490,80 +490,6 @@ static char * appendText(char *zIn, char const *zAppend, char quote){
return zIn;
}
/* This function implements the SQL scalar function dump_literal()used by
* the '.dump' built-in. It takes one argument and returns the fully quoted
** literal version of the argument depending on the type.
**
** Type Example
** -----------------------
** NULL "NULL"
** INTEGER "0"
** REAL "0.0"
** TEXT "'abc'"
** BLOB "X'89AB'"
**
*/
static void dump_literalFunc(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
static const char hexdigits[] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
};
assert( argc==1 );
switch( sqlite3_value_type(argv[0]) ){
case SQLITE_NULL:
sqlite3_result_text(context, "NULL", -1, 0);
break;
case SQLITE_INTEGER:
sqlite3_result_text(context, sqlite3_value_text(argv[0]), -1, 1);
break;
case SQLITE_FLOAT: {
char zBuf[40];
sprintf(zBuf, "%.15g", sqlite3_value_double(argv[0]));
sqlite3_result_text(context, zBuf, -1, 1);
break;
}
case SQLITE_TEXT: {
char *zText;
zText = appendText(0, sqlite3_value_text(argv[0]), '\'');
if( !zText ){
sqlite3_result_error(context, "out of memory", -1);
}else{
sqlite3_result_text(context, zText, -1, 1);
free(zText);
}
break;
}
case SQLITE_BLOB: {
char *zText = 0;
int nBlob = sqlite3_value_bytes(argv[0]);
char const *zBlob = sqlite3_value_blob(argv[0]);
zText = (char *)malloc((2*nBlob)+4);
if( !zText ){
sqlite3_result_error(context, "out of memory", -1);
}else{
int i;
for(i=0; i<nBlob; i++){
zText[(i*2)+2] = hexdigits[(zBlob[i]>>4)&0x0F];
zText[(i*2)+3] = hexdigits[(zBlob[i])&0x0F];
}
zText[(nBlob*2)+2] = '\'';
zText[(nBlob*2)+3] = '\0';
zText[0] = 'X';
zText[1] = '\'';
sqlite3_result_text(context, zText, -1, 1);
free(zText);
}
break;
}
}
}
/*
** This is a different callback routine used for dumping the database.
** Each row received by this callback consists of a table name,
@@ -609,7 +535,7 @@ static int dump_callback(void *pArg, int nArg, char **azArg, char **azCol){
zSelect = appendText(zSelect, " || ' VALUES(' || ", 0);
rc = sqlite3_step(pTableInfo);
while( rc==SQLITE_ROW ){
zSelect = appendText(zSelect, "dump_literal(", 0);
zSelect = appendText(zSelect, "quote(", 0);
zSelect = appendText(zSelect, sqlite3_column_text(pTableInfo, 1), '"');
rc = sqlite3_step(pTableInfo);
if( rc==SQLITE_ROW ){
@@ -700,9 +626,6 @@ static void open_db(struct callback_data *p){
p->zDbFilename, sqlite3_errmsg(db));
exit(1);
}
/* Add the 'dump_literal' SQL function used by .dump */
sqlite3_create_function(db,"dump_literal",1,0,0,0,dump_literalFunc,0,0);
}
}