forked from Telodendria/Telodendria
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
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* Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <Io.h>
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#include <stdio.h>
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static ssize_t
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IoReadFile(void *cookie, void *buf, size_t nBytes)
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{
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FILE *fp = cookie;
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return fread(buf, 1, nBytes, fp);
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}
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static ssize_t
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IoWriteFile(void *cookie, void *buf, size_t nBytes)
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{
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FILE *fp = cookie;
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size_t res = fwrite(buf, 1, nBytes, fp);
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/*
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* fwrite() may be buffered on some platforms, but at this low level,
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* it should not be; buffering happens in Stream, not Io.
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*/
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fflush(fp);
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return res;
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}
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static off_t
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IoSeekFile(void *cookie, off_t offset, int whence)
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{
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FILE *fp = cookie;
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off_t ret = fseeko(fp, offset, whence);
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if (ret > -1)
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{
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return ftello(fp);
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}
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else
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{
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return ret;
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}
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}
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static int
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IoCloseFile(void *cookie)
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{
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FILE *fp = cookie;
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return fclose(fp);
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}
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Io *
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IoFile(FILE * fp)
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{
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IoFunctions f;
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if (!fp)
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{
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return NULL;
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}
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f.read = IoReadFile;
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f.write = IoWriteFile;
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f.seek = IoSeekFile;
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f.close = IoCloseFile;
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return IoCreate(fp, f);
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}
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