[logline] fix the read of the template line in get_columns and add man page

lnav.1

@@ -0,0 +1,96 @@
+.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.43.3.
+.\" Some roff macros, for reference:
+.\" .nh        disable hyphenation
+.\" .hy        enable hyphenation
+.\" .ad l      left justify
+.\" .ad b      justify to both left and right margins
+.\" .nf        disable filling
+.\" .fi        enable filling
+.\" .br        insert line break
+.\" .sp <n>    insert n+1 empty lines
+.\" for manpage-specific macros, see man(7)
+.\" Define macros
+.de Vb \" Begin verbatim text                                                                                                                                                       
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.TH LNAV "1" "August 2013"
+.SH NAME
+lnav \- ncurses-based log file viewer
+.SH SYNOPSIS
+.B lnav 
+[\-hVsar] [logfile1 logfile2 ...]
+.SH DESCRIPTION
+The log file navigator, lnav, is an enhanced log file viewer that
+takes advantage of any semantic information that can be gleaned from
+the files being viewed, such as timestamps and log levels.  Using this
+extra semantic information, lnav can do things like interleaving
+messages from different files, generate histograms of messages over
+time, and providing hotkeys for navigating through the file.  It is
+hoped that these features will allow the user to quickly and
+efficiently zero in on problems.
+.SH KEY BINDINGS
+.TP
+?
+View/leave the online help text.
+.TP
+q
+Quit the program.
+.SH OPTIONS
+.TP
+\fB\-h\fR
+Print help and exit
+.TP
+\fB\-d\fR file
+Write debug messages to the given file.
+.TP
+\fB\-V\fR
+Print version information.
+.TP
+\fB\-s\fR
+Load the most recent syslog messages file.
+.TP
+\fB\-a\fR
+Load all of the most recent log file types.
+.TP
+\fB\-r\fR
+Load older rotated log files as well.
+.TP
+\fB\-t\fR
+Prepend timestamps to the lines of data being read in
+on the standard input.
+.TP
+\fB\-w\fR file
+Write the contents of the standard input to this file.
+.SS "Optional arguments:"
+.TP
+logfile1
+The log files or directories to view.  If a
+directory is given, all of the files in the
+directory will be loaded.
+.SH EXAMPLES
+To load and follow the syslog file:
+.PP
+.Vb 1
+\&    lnav \-s
+.Ve
+.PP
+To load all of the files in /var/log:
+.PP
+.Vb 1
+\&    lnav /var/log
+.Ve
+.PP
+To watch the output of make with timestamps prepended:
+.PP
+.Vb 1
+\&    make 2>&1 | lnav \-t
+.Ve
+.SH AUTHOR
+This manual page was written by Salvatore Bonaccorso <carnil@debian.org>
+for the Debian system (but may be used by others).

src/log_data_table.hh

@@ -62,8 +62,7 @@ public:
         content_line_t cl_copy = this->ldt_template_line;
         logfile *      lf      = lnav_data.ld_log_source.find(
             cl_copy);
-        std::string val = lf->read_line(
-            lf->begin() + cl_copy);
+        std::string val;
         struct line_range          body;
         string_attrs_t             sa;
         std::vector<logline_value> line_values;
@@ -72,7 +71,7 @@ public:
         if (this->ldt_format_impl != NULL) {
             this->ldt_format_impl->get_columns(cols);
         }
-        lf->read_full_message(lf->begin(), val);
+        lf->read_full_message(lf->begin() + cl_copy, val);
         format->annotate(val, sa, line_values);
         body = find_string_attr_range(sa, "body");
         if (body.lr_end == -1 || body.length() == 0) {