change semantic of fmt_fill and add man pages.
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6629de6768
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.TH fmt_fill 3
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.SH NAME
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fmt_fill \- append spaces to a string
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.SH SYNTAX
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.B #include <fmt.h>
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unsigned int \fBfmt_fill\fP(char *\fIdest\fR,
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unsigned int \fIsrclen\fR, unsigned int \fIpadlen\fR,
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unsigned int \fImaxlen\fR);
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.SH DESCRIPTION
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fmt_fill appends \fIpadlen\fR-\fIsrclen\fR spaces (if that number is
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positive) to \fIdest\fR (which holds \fIsrclen\fR bytes). It truncates
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the output only if the length would exceed \fImaxlen\fR.
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It returns the number of bytes it wrote.
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fmt_fill does not append \\0.
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If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_fill returns the number
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of bytes it would have written.
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.SH "SEE ALSO"
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fmt_strn(3), fmt_pad(3)
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.TH fmt_pad 3
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.SH NAME
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fmt_pad \- pad a string with spaces.
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.SH SYNTAX
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.B #include <fmt.h>
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unsigned int \fBfmt_pad\fP(char *\fIdest\fR, const char *\fIsource\fR,
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unsigned int \fIsrclen\fR, unsigned int \fIpadlen\fR,
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unsigned int \fImaxlen\fR);
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.SH DESCRIPTION
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fmt_pad writes \fIpadlen\fR-\fIsrclen\fR spaces (if that number is
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positive) and then \fIsrclen\fR characters from \fIsource\fR. It
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truncates the output only if the length would exceed \fImaxlen\fR.
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It returns the number of bytes it wrote.
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fmt_pad does not append \\0.
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If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_pad returns the number
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of bytes it would have written.
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.SH "SEE ALSO"
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fmt_strn(3), fmt_fill(3)
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