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/*!
\file lib/db/dbmi_base/xdrstring.c
\brief DBMI Library (base) - external data representation (string)
(C) 1999-2009, 2011 by the GRASS Development Team
This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.
\author Joel Jones (CERL/UIUC), Radim Blazek, Brad Douglas, Markus Neteler
\author Doxygenized by Martin Landa <landa.martin gmail.com> (2011)
*/
#include <string.h>
#include "xdr.h"
/*!
\brief Send string array
\param a
\param count
\return
*/
int db__send_string_array(dbString *a, int count)
{
int i;
int stat;
stat = db__send_int(count);
for (i = 0; stat == DB_OK && i < count; i++)
stat = db__send_string(&a[i]);
return stat;
}
/*!
\brief Receive string array
\param a
\param n
\return
*/
int db__recv_string_array(dbString **a, int *n)
{
int i, count;
int stat;
dbString *b;
*n = 0;
*a = NULL;
stat = db__recv_int(&count);
if (stat != DB_OK)
return stat;
if (count < 0) {
db_protocol_error();
return DB_PROTOCOL_ERR;
}
b = db_alloc_string_array(count);
if (b == NULL)
return DB_MEMORY_ERR;
for (i = 0; i < count; i++) {
stat = db__recv_string(&b[i]);
if (stat != DB_OK) {
db_free_string_array(b, count);
return stat;
}
}
*n = count;
*a = b;
return DB_OK;
}
/*!
\brief Send string
\param x
\return
*/
int db__send_string(dbString *x)
{
int stat = DB_OK;
const char *s = db_get_string(x);
int len = s ? strlen(s) + 1 : 1;
if (!s)
s = ""; /* don't send a NULL string */
if (!db__send(&len, sizeof(len)))
stat = DB_PROTOCOL_ERR;
if (!db__send(s, len))
stat = DB_PROTOCOL_ERR;
if (stat == DB_PROTOCOL_ERR)
db_protocol_error();
return stat;
}
/*!
\brief Reads a string from transport
Note: caller MUST initialize x by calling db_init_string()
\param x
\return DB_OK, DB_MEMORY_ERR, or DB_PROTOCOL_ERR
\return NULL if error
*/
int db__recv_string(dbString *x)
{
int stat = DB_OK;
int len;
char *s;
if (!db__recv(&len, sizeof(len)))
stat = DB_PROTOCOL_ERR;
if (len <= 0) /* len will include the null byte */
stat = DB_PROTOCOL_ERR;
if (db_enlarge_string(x, len) != DB_OK)
stat = DB_PROTOCOL_ERR;
s = db_get_string(x);
if (!db__recv(s, len))
stat = DB_PROTOCOL_ERR;
if (stat == DB_PROTOCOL_ERR)
db_protocol_error();
return stat;
}
/*!
\brief Send C string
\param s
\return
*/
int db__send_Cstring(const char *s)
{
dbString x;
db_init_string(&x);
db_set_string_no_copy(&x, (char *)s);
return db__send_string(&x);
}
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