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.TH buffer_init 3
.SH NAME
buffer_init \- initialize buffer structure
.SH SYNTAX
.B #include <buffer.h>
int \fBbuffer_init\fR(buffer &\fIb\fR,
int (*\fIop\fR)(int,char*,unsigned int),
int \fIfd\fR, char* \fIy\fR, unsigned int \fIylen\fR);
.SH DESCRIPTION
buffer_init prepares \fIb\fR to store a string in \fIy\fR[0], \fIy\fR[1], ...,
\fIy\fR[\fIylen\fR-1]. Initially the string is empty.
buffer_init also prepares \fIb\fR to use the read/write operation specified by
\fIop\fR and \fIfd\fR.
You can use
buffer \fIb\fR = BUFFER_INIT(\fIop\fR,\fIfd\fR,\fIy\fR,\fIylen\fR);
to initialize \fIb\fR statically if \fIop\fR, \fIfd\fR, \fIy\fR, and \fIylen\fR
are compile-time constants.
You can call buffer_init again at any time. Note that this discards the
currently buffered string.
.SH EXAMPLE
#include <buffer.h>
#include <open.h>
char buf[4096];
int fd=open_read("/etc/services");
buffer input;
if (fd>=0) {
char x;
buffer_init(&input,read,fd,buf,sizeof buf);
while (buffer_get(&input,&x,1)==1) {
buffer_put(buffer_1,&x,1);
if (x=='\\n') break;
}
buffer_flush(buffer_1);
}
.SH "SEE ALSO"
buffer_flush(3), buffer(3)