70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/* This is file CRLF2NL.C */
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/*
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** Copyright (C) 1991 DJ Delorie
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**
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** This file is distributed under the terms listed in the document
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** "copying.dj".
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** A copy of "copying.dj" should accompany this file; if not, a copy
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** should be available from where this file was obtained. This file
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** may not be distributed without a verbatim copy of "copying.dj".
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**
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** This file is distributed WITHOUT ANY WARRANTY; without even the implied
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** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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unsigned crlf2nl(char *buf, unsigned len)
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{
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char *bp = buf;
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int i=0;
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while (len--)
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{
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if (*bp != 13)
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{
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*buf++ = *bp;
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i++;
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}
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bp++;
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}
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return i;
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}
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unsigned readcr(int fd, char *buf, unsigned len)
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{
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unsigned i;
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i = read(fd, buf, len);
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if (i <= 0)
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return i;
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return crlf2nl(buf, i);
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}
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static char *sbuf = 0;
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#define BUFSIZE 4096
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unsigned writecr(int fd, char *buf, unsigned len)
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{
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unsigned bufp=0, sbufp=0, crcnt=0, rlen=0;
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int rv;
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if (sbuf == 0)
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sbuf = (char *)malloc(BUFSIZE+1);
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while (len--)
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{
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if (buf[bufp] == 10)
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{
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crcnt++;
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sbuf[sbufp++] = 13;
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}
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sbuf[sbufp++] = buf[bufp++];
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if ((sbufp >= BUFSIZE) || (len == 0))
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{
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rv = write(fd, sbuf, sbufp);
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if (rv < 0)
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return rv;
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rlen += rv - crcnt;
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crcnt = 0;
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sbufp = 0;
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}
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}
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return rlen;
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}
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