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78 lines
2.4 KiB
Plaintext
78 lines
2.4 KiB
Plaintext
NAME
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fgetline - read the next line from a file, newline is tossed
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SYNOPSIS
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fgetline(fd)
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TYPES
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fd file
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return str or nil
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DESCRIPTION
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This function reads the next line, including any trailing newline from
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the open file associated with fd. Unlike fgets, the trailing
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newline is removed from the return string.
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Empty lines return the null string. When the end of file is reached,
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fgetline returns the null value. (Note the distinction between a null
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string and a null value.)
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If the line contained a numeric value, then the 'eval' function can
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then be used to convert the string to a numeric value.
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If a line is read, is returned minus the trailing newline, otherwise
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(EOF or ERROR) nil is returned.
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EXAMPLE
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> fd = fopen("/tmp/newfile", "w")
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> fputs(fd, "chongo was here\n")
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> fputs(fd, "123\n")
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> fd2 = fopen("/tmp/newfile", "r")
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> fgets(fd2)
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"chongo was here
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"
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> fclose(fd2)
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> fd2 = fopen("/tmp/newfile", "r")
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> fgetline(fd2)
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"chongo was here"
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> eval(fgetline(fd2))
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123
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LIMITS
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fd must be associated with an open file
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LINK LIBRARY
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none
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SEE ALSO
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errno, fclose, feof, ferror, fflush, fgetc, fgetline, fgets, files, fopen,
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fprintf, fputc, fputs, fseek, fsize, ftell, isfile, printf, prompt
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## Copyright (C) 1999 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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##
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## @(#) $Revision: 29.1 $
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## @(#) $Id: fgetline,v 29.1 1999/12/14 09:15:49 chongo Exp $
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## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/fgetline,v $
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##
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## Under source code control: 1995/03/04 11:33:19
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## File existed as early as: 1995
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##
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## chongo <was here> /\oo/\ http://reality.sgi.com/chongo/
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## Share and enjoy! :-) http://reality.sgi.com/chongo/tech/comp/calc/
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