Execute the current buffer as Lisp code.
When called from a Lisp program (i.e., not interactively), this
function accepts up to five optional arguments:
BUFFER is the buffer to evaluate (nil means use current buffer).
PRINTFLAG controls printing of output:
 A value of nil means discard it; anything else is stream for print.
FILENAME specifies the file name to use for `load-history'.
UNIBYTE, if non-nil, specifies `load-convert-to-unibyte' for this
 invocation.
DO-ALLOW-PRINT, if non-nil, specifies that `print' and related
 functions should work normally even if PRINTFLAG is nil.

This function preserves the position of point.

Execute the region as Lisp code.
When called from programs, expects two arguments,
giving starting and ending indices in the current buffer
of the text to be executed.
Programs can pass third argument PRINTFLAG which controls output:
A value of nil means discard it; anything else is stream for printing it.
Also the fourth argument READ-FUNCTION, if non-nil, is used
instead of `read' to read each expression.  It gets one argument
which is the input stream for reading characters.

This function does not move point.

Don't use this yourself.

Return the suffixes that `load' should try if a suffix is required.
This uses the variables `load-suffixes' and `load-file-rep-suffixes'.

Return the canonical symbol whose name is STRING.
If there is none, one is created by this function and returned.
A second optional argument specifies the obarray to use;
it defaults to the value of `obarray'.

Return the canonical symbol named NAME, or nil if none exists.
NAME may be a string or a symbol.  If it is a symbol, that exact
symbol is searched for.
A second optional argument specifies the obarray to use;
it defaults to the value of `obarray'.

Execute a file of Lisp code named FILE.
First try FILE with `.elc' appended, then try with `.el',
then try FILE unmodified (the exact suffixes in the exact order are
determined by `load-suffixes').  Environment variable references in
FILE are replaced with their values by calling `substitute-in-file-name'.
This function searches the directories in `load-path'.

If optional second arg NOERROR is non-nil,
report no error if FILE doesn't exist.
Print messages at start and end of loading unless
optional third arg NOMESSAGE is non-nil (but `force-load-messages'
overrides that).
If optional fourth arg NOSUFFIX is non-nil, don't try adding
suffixes `.elc' or `.el' to the specified name FILE.
If optional fifth arg MUST-SUFFIX is non-nil, insist on
the suffix `.elc' or `.el'; don't accept just FILE unless
it ends in one of those suffixes or includes a directory name.

If this function fails to find a file, it may look for different
representations of that file before trying another file.
It does so by adding the non-empty suffixes in `load-file-rep-suffixes'
to the file name.  Emacs uses this feature mainly to find compressed
versions of files when Auto Compression mode is enabled.

The exact suffixes that this function tries out, in the exact order,
are given by the value of the variable `load-file-rep-suffixes' if
NOSUFFIX is non-nil and by the return value of the function
`get-load-suffixes' if MUST-SUFFIX is non-nil.  If both NOSUFFIX and
MUST-SUFFIX are nil, this function first tries out the latter suffixes
and then the former.

Loading a file records its definitions, and its `provide' and
`require' calls, in an element of `load-history' whose
car is the file name loaded.  See `load-history'.

While the file is in the process of being loaded, the variable
`load-in-progress' is non-nil and the variable `load-file-name'
is bound to the file's name.

Return t if the file exists and loads successfully.

Search for FILENAME through PATH.
Returns the file's name in absolute form, or nil if not found.
If SUFFIXES is non-nil, it should be a list of suffixes to append to
file name when searching.
If non-nil, PREDICATE is used instead of `file-readable-p'.
PREDICATE can also be an integer to pass to the access(2) function,
in which case file-name-handlers are ignored.
This function will normally skip directories, so if you want it to find
directories, make sure the PREDICATE function returns `dir-ok' for them.

Call FUNCTION on every symbol in OBARRAY.
OBARRAY defaults to the value of `obarray'.

Read one Lisp expression as text from STREAM, return as Lisp object.
If STREAM is nil, use the value of `standard-input' (which see).
STREAM or the value of `standard-input' may be:
 a buffer (read from point and advance it)
 a marker (read from where it points and advance it)
 a function (call it with no arguments for each character,
     call it with a char as argument to push a char back)
 a string (takes text from string, starting at the beginning)
 t (read text line using minibuffer and use it, or read from
    standard input in batch mode).

Read a character from the command input (keyboard or macro).
It is returned as a number.
If the character has modifiers, they are resolved and reflected to the
character code if possible (e.g. C-SPC -> 0).

If the user generates an event which is not a character (i.e. a mouse
click or function key event), `read-char' signals an error.  As an
exception, switch-frame events are put off until non-character events
can be read.
If you want to read non-character events, or ignore them, call
`read-event' or `read-char-exclusive' instead.

If the optional argument PROMPT is non-nil, display that as a prompt.
If the optional argument INHERIT-INPUT-METHOD is non-nil and some
input method is turned on in the current buffer, that input method
is used for reading a character.
If the optional argument SECONDS is non-nil, it should be a number
specifying the maximum number of seconds to wait for input.  If no
input arrives in that time, return nil.  SECONDS may be a
floating-point value.

Read a character from the command input (keyboard or macro).
It is returned as a number.  Non-character events are ignored.
If the character has modifiers, they are resolved and reflected to the
character code if possible (e.g. C-SPC -> 0).

If the optional argument PROMPT is non-nil, display that as a prompt.
If the optional argument INHERIT-INPUT-METHOD is non-nil and some
input method is turned on in the current buffer, that input method
is used for reading a character.
If the optional argument SECONDS is non-nil, it should be a number
specifying the maximum number of seconds to wait for input.  If no
input arrives in that time, return nil.  SECONDS may be a
floating-point value.

Read an event object from the input stream.
If the optional argument PROMPT is non-nil, display that as a prompt.
If the optional argument INHERIT-INPUT-METHOD is non-nil and some
input method is turned on in the current buffer, that input method
is used for reading a character.
If the optional argument SECONDS is non-nil, it should be a number
specifying the maximum number of seconds to wait for input.  If no
input arrives in that time, return nil.  SECONDS may be a
floating-point value.

Read one Lisp expression which is represented as text by STRING.
Returns a cons: (OBJECT-READ . FINAL-STRING-INDEX).
FINAL-STRING-INDEX is an integer giving the position of the next
 remaining character in STRING.
START and END optionally delimit a substring of STRING from which to read;
 they default to 0 and (length STRING) respectively.

Delete the symbol named NAME, if any, from OBARRAY.
The value is t if a symbol was found and deleted, nil otherwise.
NAME may be a string or a symbol.  If it is a symbol, that symbol
is deleted, if it belongs to OBARRAY--no other symbol is deleted.
OBARRAY defaults to the value of the variable `obarray'.