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124 lines
4.0 KiB
C
124 lines
4.0 KiB
C
//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: Buffer library //
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// //
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// //
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// Copyright © 2018-2019 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 3 of the License, or //
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// any later version. //
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// //
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// OS/K is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY//without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#include <lib/buf.h>
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#include <ex/malloc.h>
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Buffer_t *BStdIn, *BStdOut, *BStdDbg;
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//
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// Creates an actual buffer
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//
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error_t BOpenPureBuf(Buffer_t **pbuf, int mode, size_t size)
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{
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if (*pbuf != NULL) {
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assert(0);
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return EINVAL;
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}
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return BOpenPureBufEx(pbuf, NULL, mode, size, NULL);
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}
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error_t BOpenPureBufEx(Buffer_t **pbuf, char *source, int mode, size_t size,
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BFlusher_t flusher)
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{
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Buffer_t *buf;
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assert(mode == BS_RDWR || mode == BS_RDONLY || mode == BS_WRONLY);
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if (!pbuf) return EINVAL;
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if (!*pbuf) {
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buf = malloc(sizeof *buf);
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if (!buf) return ENOMEM;
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buf->flags = BF_BALLOC;
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}
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else {
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buf = *pbuf;
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buf->flags = 0;
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}
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ExInitLock(&buf->lock);
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ExAcquireLock(&buf->lock);
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buf->size = size;
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buf->state = mode;
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//buf->buf = NULL;
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if (source == NULL) {
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KalAllocMemoryEx((void **)&buf->buf, buf->size, M_ZEROED, 0);
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buf->flags |= BF_SALLOC;
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} else {
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buf->buf = (uchar *)source;
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}
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buf->wp = buf->rp = buf->buf;
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buf->flusher = flusher;
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ExReleaseLock(&buf->lock);
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// Second allocation failed
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if (buf->buf == NULL) {
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BCloseBuf(buf);
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return ENOMEM;
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}
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*pbuf = buf;
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return EOK;
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}
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//
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// Creates a terminal buffer of (nLines + pbCount*nLines) lines each
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// of lineLen length (pb = playback buffer, for scrolling up)
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//
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error_t BOpenTermBuf(Buffer_t **pbuf, int mode,
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int lineLen, int nLines, int pbCount)
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{
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if (*pbuf != NULL) {
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assert(0);
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return EINVAL;
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}
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return BOpenTermBufEx(pbuf, NULL, mode, lineLen, nLines, pbCount, NULL);
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}
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error_t BOpenTermBufEx(Buffer_t **pbuf, char *source, int mode,
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int lineLen, int nLines, int pbCount, BFlusher_t flusher)
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{
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error_t rc;
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size_t size = lineLen * nLines * (pbCount + 1);
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assert(lineLen > 0 && nLines > 0 && pbCount >= 0);
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rc = BOpenPureBufEx(pbuf, source, mode, size, flusher);
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if (!rc) {
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(*pbuf)->lastLF = 0;
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(*pbuf)->nLines = nLines;
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(*pbuf)->lineLen = lineLen;
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(*pbuf)->flags |= BF_TERM;
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}
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return rc;
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}
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