add some man pages
leitner
22 years ago
parent
3cf6f00371
commit
5950f0c5ae
@ -0,0 +1,37 @@
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.TH buffer 3
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.SH NAME
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buffer.h \- generic read/write buffering
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.SH SYNTAX
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.B #include <buffer.h>
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buffer* buffer_0; /* like stdio's stdin */
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buffer* buffer_1; /* like stdio's stdout */
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buffer* buffer_2; /* like stdio's stderr */
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.SH DESCRIPTION
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buffer.h provides a generic buffer interface that can be used for
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read and write buffering. Buffers must be initialized with
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\fBbuffer_init\fR.
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A buffer can only be used for reading or writing at the same time, not
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both.
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Unlike stdio, these write buffers are not flushed automatically at
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program termination; you must manually call \fBbuffer_flush\fR,
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\fBbuffer_putsflush\fR, \fBbuffer_putflush\fR or
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\fBbuffer_putnlflush\fR.
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.SH EXAMPLE
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See buffer_init(3) for example read buffer code. Here is typical code
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for printing an error message on stderr:
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#include <buffer.h>
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buffer_puts(buffer_2,"error: got only ");
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buffer_putulong(buffer_2,got);
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buffer_puts(buffer_2," bytes, but expected at least ");
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buffer_putulong(buffer_2,expected);
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buffer_putsflush(buffer_2," bytes!");
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.SH "SEE ALSO"
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buffer_init(3), buffer_put(3), buffer_get(3), buffer_flush(3)
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@ -0,0 +1,14 @@
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.TH buffer_feed 3
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.SH NAME
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buffer_feed \- low-level component of buffer_get
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_feed\fP(buffer* \fIb\fR);
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.SH DESCRIPTION
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If the string is nonempty, buffer_feed returns the length of the string.
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If the string is empty, buffer_feed uses the read operation to feed data
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into the string; it then returns the new length of the string, or 0 for
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end of input, or -1 for error.
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.SH "SEE ALSO"
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buffer_init(3), buffer_get(3), buffer_peek(3), buffer_feed(3), buffer(3)
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@ -0,0 +1,27 @@
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.TH buffer_flush 3
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.SH NAME
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buffer_flush \- feed buffer to write function
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_flush\fP(buffer* \fIb\fR);
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.SH DESCRIPTION
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buffer_flush feeds a string \fId\fR[0], \fId\fR[1], ...,
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\fId\fR[\fIdlen\fR-1] to the write operation by calling
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\fBop\fR(\fIfd\fR,\fId\fR,\fIdlen\fR)
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If \fBop\fR successfully handles one or more bytes at the beginning of
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the string, it must return the number of bytes handled; if this number
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is smaller than \fIdlen\fR, buffer_flush will call \fBop\fR again with
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the rest of the string. If \fBop\fR does not handle any bytes, and does
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not encounter an error, it must return 0, or return -1 with \fIerrno\fR
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set to EINTR; in either case, buffer_flush will immediately call \fBop\fR
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again. If \fBop\fR encounters an error, it must return -1 with errno set to
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something other than EINTR; buffer_flush will pass the error to the
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caller.
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On success, buffer_flush returns 0. On error, buffer_flush returns -1,
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setting \fIerrno\fR appropriately.
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.SH "SEE ALSO"
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buffer_init(3)
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.TH buffer_get 3
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.SH NAME
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buffer_get \- read binary data from buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_get\fP(buffer* \fIb\fR,char* \fIx\fR,unsigned int \fIlen\fR);
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.SH DESCRIPTION
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Normally buffer_get copies data to \fIx\fR[0], \fIx\fR[1], ...,
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\fIx\fR[\fIlen\fR-1] from the beginning of a string stored in
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preallocated space; removes these \fIlen\fR bytes from the string; and
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returns \fIlen\fR.
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If, however, the string has fewer than \fIlen\fR (but more than 0)
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bytes, buffer_get copies only that many bytes, and returns that number.
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If the string is empty, buffer_get first uses a \fBread operation\fR to
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feed data into the string. The \fBread operation\fR may indicate end of
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input, in which case buffer_get returns 0; or a read error, in which
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case buffer_get returns -1, setting \fIerrno\fR approporiately.
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The preallocated space and the \fBread operation\fR are specified by
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\fIb\fR. You must initialize \fBb\fR using buffer_init before calling
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buffer_get (or use the pre-initialized buffer_0).
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.SH "SEE ALSO"
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buffer_init(3), buffer_feed(3), buffer_peek(3), buffer_seek(3), buffer(3)
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@ -0,0 +1,27 @@
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.TH buffer_get_token 3
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.SH NAME
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buffer_get_token \- read token from buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_get_token\fP(buffer* \fIb\fR,char* \fIx\fR,unsigned int \fIlen\fR,
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const char* \fIcharset\fR,unsigned int \fIsetlen\fR);
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.SH DESCRIPTION
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Normally buffer_get_token copies data to \fIx\fR[0], \fIx\fR[1], ...,
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\fIx\fR[\fIlen\fR-1] from the beginning of a string stored in
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preallocated space; removes these \fIlen\fR bytes from the string; and
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returns \fIlen\fR.
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If, however, the string has fewer than \fIlen\fR (but more than 0)
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bytes, buffer_get_token copies only that many bytes, and returns that number.
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If the string is empty, buffer_get_token first uses a \fBread operation\fR to
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feed data into the string. The \fBread operation\fR may indicate end of
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input, in which case buffer_get_token returns 0; or a read error, in which
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case buffer_get_token returns -1, setting \fIerrno\fR approporiately.
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The preallocated space and the \fBread operation\fR are specified by
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\fIb\fR. You must initialize \fBb\fR using buffer_init before calling
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buffer_get_token (or use the pre-initialized buffer_0).
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.SH "SEE ALSO"
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buffer_init(3), buffer_feed(3), buffer_peek(3), buffer_seek(3), buffer(3)
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.TH buffer_getc 3
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.SH NAME
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buffer_getc \- read one char from buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_getc\fP(buffer* \fIb\fR,char* \fIx\fR);
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.SH DESCRIPTION
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buffer_getc(b,x) is similar to buffer_get(b,x,1).
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.SH "SEE ALSO"
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buffer_init(3), buffer_get(3), buffer(3)
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@ -0,0 +1,22 @@
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.TH buffer_getn 3
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.SH NAME
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buffer_getn \- read binary data from buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_getn\fP(buffer* \fIb\fR,char* \fIx\fR,unsigned int \fIlen\fR);
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.SH DESCRIPTION
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buffer_getn copies data to \fIx\fR[0], \fIx\fR[1], ...,
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\fIx\fR[\fIlen\fR-1] from the buffer, calling buffer_feed as needed, and
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returns \fIlen\fR.
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If a read error occurs, buffer_getn returns -1 and sets \fIerrno\fR
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appropriately. It may then have put any number between 0 and \fIlen\fR
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in the buffer, you can't tell. That makes this function only useful if
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you don't care when an error occurs. Use buffer_get otherwise.
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If the read operation signals end-of-file before \fIlen\fR bytes were
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read, buffer_getn returns the number of bytes read from the buffer
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before end-of-file.
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.SH "SEE ALSO"
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buffer_init(3), buffer_get(3), buffer(3)
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@ -0,0 +1,45 @@
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.TH buffer_init 3
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.SH NAME
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buffer_init \- initialize buffer structure
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_init\fR(buffer &\fIb\fR,
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int (*\fIop\fR)(int,char*,unsigned int),
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int \fIfd\fR, char* \fIy\fR, unsigned int \fIylen\fR);
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.SH DESCRIPTION
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buffer_init prepares \fIb\fR to store a string in \fIy\fR[0], \fIy\fR[1], ...,
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\fIy\fR[\fIylen\fR-1]. Initially the string is empty.
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buffer_init also prepares \fIb\fR to use the read/write operation specified by
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\fIop\fR and \fIfd\fR.
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You can use
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buffer \fIb\fR = BUFFER_INIT(\fIop\fR,\fIfd\fR,\fIy\fR,\fIylen\fR);
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to initialize \fIb\fR statically if \fIop\fR, \fIfd\fR, \fIy\fR, and \fIylen\fR
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are compile-time constants.
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You can call buffer_init again at any time. Note that this discards the
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currently buffered string.
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.SH EXAMPLE
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#include <buffer.h>
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#include <open.h>
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char buf[4096];
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int fd=open_read("/etc/services");
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buffer input;
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if (fd>=0) {
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char x;
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buffer_init(&input,read,fd,buf,sizeof buf);
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while (buffer_get(&input,&x,1)==1) {
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buffer_put(buffer_1,&x,1);
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if (x=='\\n') break;
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}
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buffer_flush(buffer_1);
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}
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.SH "SEE ALSO"
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buffer_flush(3), buffer(3)
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@ -0,0 +1,23 @@
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.TH buffer_peek 3
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.SH NAME
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buffer_peek \- return pointer to string in buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_peek\fP(buffer* \fIb\fR);
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.SH DESCRIPTION
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buffer_peek returns a pointer to the first byte of the string in the
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buffer.
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.SH EXAMPLE
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buffer_feed, buffer_peek and buffer_seek can be used for efficient reading
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loops, nearly the same speed as calling \fBop\fR directly:
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for (;;) {
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r = buffer_feed(&b);
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if (r <= 0) return r;
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x = buffer_peek(&b);
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dosomething(x,r);
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buffer_seek(&b,r);
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}
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.SH "SEE ALSO"
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buffer_init(3), buffer_feed(3), buffer_get(3), buffer_seek(3), buffer(3)
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@ -0,0 +1,19 @@
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.TH buffer_put 3
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.SH NAME
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buffer_put \- write binary data to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_put\fP(buffer* \fIb\fR,const char* \fIx\fR,unsigned int \fIlen\fR);
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.SH DESCRIPTION
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buffer_put writes \fIlen\fR bytes from \fIx\fR to \fIb\fR.
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The difference to buffer_putalign is that, when there isn't enough space
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for new data, buffer_put calls buffer_flush before copying any data,
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while buffer_putalign fills all available space with data before calling
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buffer_flush.
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On success, buffer_put returns 0. On error, buffer_put returns -1,
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setting \fIerrno\fR appropriately.
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.SH "SEE ALSO"
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buffer_putalign(3), buffer_puts(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,13 @@
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.TH buffer_put8long 3
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.SH NAME
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buffer_put8long \- write an octal ASCII representation of an unsigned
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long integer to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_put8long\fP(buffer* \fIb\fR,unsigned long \fIx\fR);
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.SH DESCRIPTION
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buffer_put8long is similar to passing the result of fmt_8long to
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buffer_put.
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.SH "SEE ALSO"
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fmt_8long(3), buffer_put(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,16 @@
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.TH buffer_putalign 3
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.SH NAME
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buffer_putalign \- write binary data to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putalign\fP(buffer* \fIb\fR,const char* \fIx\fR,unsigned int \fIlen\fR);
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.SH DESCRIPTION
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buffer_putalign is similar to buffer_put.
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The difference to buffer_put is that, when there isn't enough space for
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new data, buffer_put calls buffer_flush before copying any data, while
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buffer_putalign fills all available space with data before calling
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buffer_flush.
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.SH "SEE ALSO"
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buffer_put(3), buffer_putsalign(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,13 @@
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.TH buffer_putflush 3
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.SH NAME
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buffer_putflush \- write binary data to buffer and flush
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putflush\fP(buffer* \fIb\fR,
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const char* \fIx\fR,unsigned int \fIlen\fR);
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.SH DESCRIPTION
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buffer_putflush is similar to calling
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buffer_put(\fIb\fR,\fIx\fR,\fIlen\fR) and then buffer_flush(\fIb\fR).
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.SH "SEE ALSO"
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buffer_put(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,13 @@
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.TH buffer_putlong 3
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.SH NAME
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buffer_putlong \- write a decimal ASCII representation of a signed
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long integer to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putlong\fP(buffer* \fIb\fR,unsigned long \fIx\fR);
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.SH DESCRIPTION
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buffer_putlong is similar to passing the result of fmt_long to
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buffer_put.
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.SH "SEE ALSO"
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fmt_long(3), buffer_put(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,12 @@
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.TH buffer_putnlflush 3
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.SH NAME
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buffer_putnlflush \- write '\\n' to buffer and flush
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putnlflush\fP(buffer* \fIb\fR);
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.SH DESCRIPTION
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buffer_putnlflush writes a single ASCII new-line character ('\\n') to
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\fIb\fR and calls buffer_flush(\fIb\fR).
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.SH "SEE ALSO"
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buffer_puts(3), buffer_put(3), buffer_flush(3), buffer(3)
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.TH buffer_puts 3
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.SH NAME
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buffer_puts \- write ASCIIZ string to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_puts\fP(buffer* \fIb\fR,const char* \fIx\fR);
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.SH DESCRIPTION
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buffer_puts is like buffer_put with \fIlen\fR determined as the number
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of bytes before the first \\0 in \fIx\fR.
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The difference to buffer_putsalign is that, when there isn't enough space
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for new data, buffer_puts calls buffer_flush before copying any data,
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while buffer_putsalign fills all available space with data before calling
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buffer_flush.
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.SH "SEE ALSO"
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buffer_putsalign(3), buffer_put(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,12 @@
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.TH buffer_putsalign 3
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.SH NAME
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buffer_putsalign \- write ASCIIZ string to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putsalign\fP(buffer* \fIb\fR,const char* \fIx\fR);
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.SH DESCRIPTION
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buffer_putsalign is like buffer_putalign with \fIlen\fR determined as
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the number of bytes before the first \\0 in \fIx\fR.
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.SH "SEE ALSO"
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buffer_puts(3), buffer_put(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,12 @@
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.TH buffer_putsflush 3
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.SH NAME
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buffer_putsflush \- write ASCIIZ string to buffer and flush
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putsflush\fP(buffer* \fIb\fR,const char* \fIx\fR);
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.SH DESCRIPTION
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buffer_putsflush is like buffer_putflush with \fIlen\fR determined as
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the number of bytes before the first \\0 in \fIx\fR.
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.SH "SEE ALSO"
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buffer_put(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,11 @@
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.TH buffer_putspace 3
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.SH NAME
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buffer_putspace \- write ASCII space to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putspace\fP(buffer* \fIb\fR);
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.SH DESCRIPTION
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buffer_putspace writes a single ASCII space character to \fIb\fR.
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.SH "SEE ALSO"
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buffer_puts(3), buffer_put(3), buffer_flush(3), buffer(3)
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.TH buffer_putulong 3
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.SH NAME
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buffer_putulong \- write a decimal ASCII representation of an unsigned
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long integer to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putulong\fP(buffer* \fIb\fR,unsigned long \fIx\fR);
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.SH DESCRIPTION
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buffer_putulong is similar to passing the result of fmt_ulong to
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buffer_put.
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.SH "SEE ALSO"
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fmt_ulong(3), buffer_put(3), buffer_flush(3), buffer(3)
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@ -0,0 +1,13 @@
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.TH buffer_putxlong 3
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.SH NAME
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buffer_putxlong \- write a hexidecimal ASCII representation of an unsigned
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long integer to buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_putxlong\fP(buffer* \fIb\fR,unsigned long \fIx\fR);
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.SH DESCRIPTION
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buffer_putxlong is similar to passing the result of fmt_xlong to
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buffer_put.
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.SH "SEE ALSO"
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fmt_xlong(3), buffer_put(3), buffer_flush(3), buffer(3)
|
||||
@ -0,0 +1,12 @@
|
||||
.TH buffer_seek 3
|
||||
.SH NAME
|
||||
buffer_seek \- remove bytes from beginning of string in buffer
|
||||
.SH SYNTAX
|
||||
.B #include <buffer.h>
|
||||
|
||||
int \fBbuffer_seek\fP(buffer* \fIb\fR,unsigned int \fIr\fR);
|
||||
.SH DESCRIPTION
|
||||
buffer_seek removes \fIr\fR bytes from the beginning of the string.
|
||||
\fIr\fR must be at most the current length of the string.
|
||||
.SH "SEE ALSO"
|
||||
buffer_init(3), buffer_feed(3), buffer_peek(3), buffer_get(3), buffer(3)
|
||||
@ -0,0 +1,7 @@
|
||||
#include "buffer.h"
|
||||
|
||||
void buffer_seek(buffer* b,unsigned int len) {
|
||||
unsigned int n=b->p+len;
|
||||
if (n>b->n) n=b->n;
|
||||
b->p=n;
|
||||
}
|
||||
@ -0,0 +1,13 @@
|
||||
.TH scan_8short 3
|
||||
.SH NAME
|
||||
scan_8short \- parse an unsigned short integer in octal ASCII representation
|
||||
.SH SYNTAX
|
||||
.B #include <scan.h>
|
||||
|
||||
int \fBscan_8short\fP(const char *\fIsrc\fR,unsigned short *\fIdest\fR);
|
||||
.SH DESCRIPTION
|
||||
scan_8short parses an unsigned short integer in octal ASCII representation
|
||||
from \fIsrc\fR and writes the result into \fIdest\fR. It returns the
|
||||
number of bytes read from \fIsrc\fR.
|
||||
.SH "SEE ALSO"
|
||||
scan_xshort(3)
|
||||
@ -0,0 +1,13 @@
|
||||
.TH scan_ushort 3
|
||||
.SH NAME
|
||||
scan_ushort \- parse an unsigned short integer in decimal ASCII representation
|
||||
.SH SYNTAX
|
||||
.B #include <scan.h>
|
||||
|
||||
int \fBscan_ushort\fP(const char *\fIsrc\fR,unsigned short *\fIdest\fR);
|
||||
.SH DESCRIPTION
|
||||
scan_ushort parses an unsigned short integer in decimal ASCII representation
|
||||
from \fIsrc\fR and writes the result into \fIdest\fR. It returns the
|
||||
number of bytes read from \fIsrc\fR.
|
||||
.SH "SEE ALSO"
|
||||
scan_xshort(3), scan_8short(3), fmt_ulong(3)
|
||||
@ -0,0 +1,17 @@
|
||||
.TH scan_xshort 3
|
||||
.SH NAME
|
||||
scan_xshort \- parse an unsigned short integer in hexadecimal ASCII representation
|
||||
.SH SYNTAX
|
||||
.B #include <scan.h>
|
||||
|
||||
int \fBscan_xshort\fP(const char *\fIsrc\fR,unsigned short *\fIdest\fR);
|
||||
.SH DESCRIPTION
|
||||
scan_xshort parses an unsigned short integer in hexadecimal ASCII
|
||||
representation from \fIsrc\fR and writes the result into \fIdest\fR. It
|
||||
returns the number of bytes read from \fIsrc\fR.
|
||||
|
||||
scan_xshort understands both upper and lower case letters.
|
||||
|
||||
scan_xshort does not expect or understand a "0x" prefix.
|
||||
.SH "SEE ALSO"
|
||||
fmt_xshort(3)
|
||||
Loading…
Reference in New Issue