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53 lines
1.2 KiB
Plaintext
53 lines
1.2 KiB
Plaintext
NAME
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fgetfield - read the next word from a file
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SYNOPSIS
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fgetfield(fs)
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TYPES
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fs file stream open for reading
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return string, null or error value
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DESCRIPTION
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If characters cannot be read from the file, an error value is returned.
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Otherwise starting at the current file position, any whitespace
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characters are skipped. If the reading reaches end-of-file, the
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null value is returned. If non-whitespace is encountered, formation
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of a string begins, continuing until whitespace of '\0' or end-of-file
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is reached. The returned value is this string (terminated as usual
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by a null character). After the operation, the file position will
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be immediately after the first whitespace character of '\0' or at
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end-of-file.
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EXAMPLE
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> f = fopen("/tmp/junk", "w")
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> fputs(f, " Alpha Beta \n")
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> freopen(f, "r")
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> fgetfield(f)
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"Alpha"
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> fgetfield(f)
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"Beta"
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> fgetfield(f)
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>
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> freopen(f, "w")
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> fputstr(f, " Alpha ", "Beta")
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> freopen(f, "r")
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> fgetfield(f)
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"Alpha"
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> fgetfield(f)
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""
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> fgetfield(f)
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"Beta"
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LIMITS
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none - XXX - is this correct?
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LIBRARY
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none - XXX - is this correct?
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SEE ALSO
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fgetstr, fputstr, fgets, fputs, fopen, files, fprintf
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