srv_get_text

Read a text or image datastream from a client, in chunks.

CS_RETCODE srv_get_text(spp, bp, buflen, outlenp)

SRV_PROC    *spp;
CS_BYTE       *bp;
CS_INT           buflen;
CS_INT          *outlenp;

buflen: The size of the *bp pointer. This indicates how many bytes are transferred in each chunk.

outlenp: The number of the bytes read into the *bp buffer is returned here.

**Table 3-47: Return values (srv_get_text)**
Returns	To indicate
CS_SUCCEED	The call to srv_get_text ran successfully.
CS_FAIL	The routine failed.
CS_END_DATA	Open Server read in the entire text or image data stream.

#include        <ospublic.h>

#include        <stdio.h>

/*

 ** Local Prototype

*/

CS_RETCODE    ex_srv_get_text        PROTOTYPE((

SRV_PROC      *spp,

CS_INT        *outlenp,

CS_BYTE       *bbuf

));

/*

 ** EX_SRV_GET_TEXT

**

**    Example routine to read chunks of text or image datastream

 **    from a client into a buffer and then write it to a disk

 **    file.

**

** Arguments:

**

**    spp        Pointer to thread control structure.

**    outlenp    Number of bytes read and written.

**    bbuf       Pointer to very large buffer for text.

**

** Returns

**

**    CS_SUCCEED    The data was successfully read.

**    CS_FAIL       An error was detected.

**

*/

#define    BUFSIZE     256

#define    FPUTS(a,b)      fputs(a,b)

CS_RETCODE  ex_srv_get_text(spp,outlenp,bbuf)

SRV_PROC    *spp;

CS_INT      *outlenp;

CS_BYTE     *bbuf;

   CS_INT       llen;    /* Local length. */

    CS_INT       lout;    /* Local read count. */

    CS_RETCODE   lret;    /* Local return code. */

    CS_BYTE      *lbufp;    /* Local pointer into bbuf. */

   /* Check arguments. */

   if(bbuf == (CS_VOID *)0)

      return(CS_FAIL);

   if(spp == (SRV_PROC *)0)

      return(CS_FAIL);

   llen = BUFSIZE;

   lbufp = bbuf;

/*

    ** Loop around getting data and copy it to bbuf.

*/

   while(lret != CS_END_DATA)

        (CS_VOID)srv_bzero(lbufp,BUFSIZE);

        lout = 0;

        lret = srv_get_text(spp, lbufp, llen, &lout);

        if(lret == CS_FAIL)

            break;

        *outlenp += lout;

        lbufp += lout;

    if(lret == CS_END_DATA)

        return(CS_SUCCEED);

    else

        return(lret);

srv_get_text is used to read bulk data from a client. The bulk data can be of type text or image.
srv_get_text must be called until all of the bulk data has been read from a client. It returns CS_END_DATA when the whole data stream has been read in.
srv_get_text can only be called from inside the SRV_BULK event handler.
A column read with srv_get_text must be of type text or image.
An Open Server application must call srv_text_info prior to the first call to srv_get_text for the data stream. The application then calls srv_get_text to retrieve a chunk. srv_get_text is called as many times as are necessary to read in the whole column.
Open Server treats text and image data streams except that it converts only text data before sending it to the Open Server application. The only conversion by Open Server performs is character set translation.