102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2006 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "gtm_stdio.h"
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#include "io.h"
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#include "iottdef.h"
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#include "iomtdef.h"
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#include "iosp.h"
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GBLREF io_pair io_curr_device;
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int iomt_readfl(mval *v, int4 l, int4 t)
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{
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error_def (ERR_MTRDTHENWRT);
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io_desc *dv;
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d_mt_struct *mt_ptr;
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dv = io_curr_device.in;
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mt_ptr = (d_mt_struct *) dv->dev_sp;
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#ifdef UNIX
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if (mt_ptr->mode != MT_M_READ)
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{
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unsigned short status;
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status = iomt_reopen(dv, MT_M_READ, FALSE);
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if (status != SS_NORMAL)
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return (status);
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}
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#endif
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switch (mt_ptr->last_op)
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{
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case mt_rewind:
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if (mt_ptr->labeled == MTLAB_DOS11)
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iomt_rddoslab(dv);
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else if (mt_ptr->labeled == MTLAB_ANSI)
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iomt_rdansistart(dv);
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/* CAUTION: FALL THROUGH */
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case mt_null:
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if (iomt_readblk(dv))
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{
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if (mt_ptr->stream)
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iomt_rdstream(l, v->str.addr, dv);
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else
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iomt_getrec(dv);
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}
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break;
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case mt_read:
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if (mt_ptr->stream)
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iomt_rdstream(l, v->str.addr, dv);
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break;
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default:
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rts_error(VARLSTCNT (1) ERR_MTRDTHENWRT);
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}
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if (io_curr_device.in->dollar.zeof)
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{
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v->str.len = 0;
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return TRUE;
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}
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if (mt_ptr->stream)
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{
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v->str.len = mt_ptr->rec.len;
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mt_ptr->last_op = (mt_ptr->buffptr >= mt_ptr->bufftop)
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? mt_null : mt_read;
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} else
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{
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if (mt_ptr->rec.len <= l)
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{
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memcpy(v->str.addr, mt_ptr->rec.addr, mt_ptr->rec.len);
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v->str.len = mt_ptr->rec.len;
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io_curr_device.in->dollar.x = 0;
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io_curr_device.in->dollar.y++;
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mt_ptr->last_op = (mt_ptr->buffptr >= mt_ptr->bufftop)
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? mt_null : mt_read;
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mt_ptr->rec.len = 0;
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} else
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{
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memcpy(v->str.addr, mt_ptr->rec.addr, l);
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v->str.len = l;
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mt_ptr->rec.addr += l;
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mt_ptr->rec.len -= l;
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io_curr_device.in->dollar.x += l;
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mt_ptr->last_op = mt_read;
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}
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if (mt_ptr->rec.len <= 0 && mt_ptr->last_op == mt_read)
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iomt_getrec(dv);
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}
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return TRUE;
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}
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