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.TH buffer_get_token_sa 3
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.SH NAME
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buffer_get_token_sa \- read token from buffer
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.SH SYNTAX
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.nf
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.B #include <libowfat/stralloc.h>
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.B #include <libowfat/buffer.h>
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int \fBbuffer_get_token_sa\fP(buffer* \fIb\fR,stralloc* \fIsa\fR,
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const char* \fIcharset\fR,size_t \fIsetlen\fR);
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.SH DESCRIPTION
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buffer_get_token_sa appends data from the \fIb\fR to \fIsa\fR until one
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of the delimiters in \fIcharset\fR is found, NOT overwriting the
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previous content of \fIsa\fR. That delimiter is also appended to
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\fIsa\fR.
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If reading from the buffer or allocating memory fails,
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buffer_get_token_sa returns -1 and sets \fIerrno\fR appropriately. At
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that point \fIsa\fR may already contain a partial token.
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.SH "RETURN VALUE"
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-1 on error (setting errno), 0 on EOF, 1 when successful.
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.SH RATIONALE
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buffer_get_token_sa appends instead of overwriting so it can be used on
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non-blocking sockets (these signal error and set \fIerrno\fR to EAGAIN;
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in this case you can simply call buffer_get_token_sa again when
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\fBselect\fR or \fBpoll\fR indicate more data is available).
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.SH "SEE ALSO"
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buffer_getline_sa(3), buffer_get_token(3), buffer(3)
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