add man pages for buffer_from*

buffer/buffer_fromarray.3

@@ -0,0 +1,19 @@
+.TH buffer_fromarray 3
+.SH NAME
+buffer_fromarray \- initialize buffer structure from array
+.SH SYNTAX
+.B #include <array.h>
+.B #include <buffer.h>
+
+void \fBbuffer_fromarray\fR(buffer* \fIb\fR,array* \fIa\fR);
+.SH DESCRIPTION
+buffer_fromarray makes a virtual read buffer from an array.  The buffer
+reading functions will be able to read until the end of the data in the
+array, then signal EOF.  The buffer does not have its own buffer
+space, it reuses the one in the array.
+
+Do not touch the array until you are done with the buffer!
+
+Reading data from the buffer will not change the stralloc.
+.SH "SEE ALSO"
+buffer_fromsa(3), buffer_init(3), buffer(3), buffer_frombuf(3)

buffer/buffer_frombuf.3

@@ -0,0 +1,18 @@
+.TH buffer_frombuf 3
+.SH NAME
+buffer_frombuf \- initialize buffer structure from raw memory
+.SH SYNTAX
+.B #include <buffer.h>
+
+void \fBbuffer_frombuf\fR(buffer* \fIb\fR,const char* \fIx\fR, size_t \fIl\fR);
+.SH DESCRIPTION
+buffer_frombuf makes a virtual read buffer from a raw memory area.  The buffer
+reading functions will be able to read until the end of the data in the
+memory area, then signal EOF.  The buffer does not have its own buffer
+space, it reuses the one passed into this function.
+
+Do not touch this memory until you are done with the buffer!
+
+Reading data from the buffer will not change the memory you passed in.
+.SH "SEE ALSO"
+buffer_fromsa(3), buffer_init(3), buffer(3), buffer_frombuf(3)

buffer/buffer_fromsa.3

@@ -11,9 +11,9 @@ reading functions will be able to read until the end of the data in the
 stralloc, then signal EOF.  The buffer does not have its own buffer
 space, it reuses the one in the stralloc.
 
-Do not touch the stralloc until your are done with the buffer!  In
+Do not touch the stralloc until you are done with the buffer!  In
 particular, do not call stralloc_free on it!
 
 Reading data from the buffer will not change the stralloc.
 .SH "SEE ALSO"
-buffer_tosa(3), buffer_init(3), buffer(3)
+buffer_tosa(3), buffer_init(3), buffer(3), buffer_frombuf(3), buffer_fromarray(3)