-This is ../info/lispref.info, produced by makeinfo version 3.12s from
+This is ../info/lispref.info, produced by makeinfo version 4.0 from
lispref/lispref.texi.
INFO-DIR-SECTION XEmacs Editor
Foundation instead of in the original English.
\1f
-File: lispref.info, Node: Building XEmacs, Next: Pure Storage, Up: Building XEmacs and Object Allocation
-
-Building XEmacs
-===============
-
- This section explains the steps involved in building the XEmacs
-executable. You don't have to know this material to build and install
-XEmacs, since the makefiles do all these things automatically. This
-information is pertinent to XEmacs maintenance.
-
- The `XEmacs Internals Manual' contains more information about this.
-
- Compilation of the C source files in the `src' directory produces an
-executable file called `temacs', also called a "bare impure XEmacs".
-It contains the XEmacs Lisp interpreter and I/O routines, but not the
-editing commands.
-
- Before XEmacs is actually usable, a number of Lisp files need to be
-loaded. These define all the editing commands, plus most of the startup
-code and many very basic Lisp primitives. This is accomplished by
-loading the file `loadup.el', which in turn loads all of the other
-standardly-loaded Lisp files.
-
- It takes a substantial time to load the standard Lisp files.
-Luckily, you don't have to do this each time you run XEmacs; `temacs'
-can dump out an executable program called `xemacs' that has these files
-preloaded. `xemacs' starts more quickly because it does not need to
-load the files. This is the XEmacs executable that is normally
-installed.
-
- To create `xemacs', use the command `temacs -batch -l loadup dump'.
-The purpose of `-batch' here is to tell `temacs' to run in
-non-interactive, command-line mode. (`temacs' can _only_ run in this
-fashion. Part of the code required to initialize frames and faces is
-in Lisp, and must be loaded before XEmacs is able to create any frames.)
-The argument `dump' tells `loadup.el' to dump a new executable named
-`xemacs'.
-
- The dumping process is highly system-specific, and some operating
-systems don't support dumping. On those systems, you must start XEmacs
-with the `temacs -batch -l loadup run-temacs' command each time you use
-it. This takes a substantial time, but since you need to start Emacs
-once a day at most--or once a week if you never log out--the extra time
-is not too severe a problem. (In older versions of Emacs, you started
-Emacs from `temacs' using `temacs -l loadup'.)
-
- You are free to start XEmacs directly from `temacs' if you want,
-even if there is already a dumped `xemacs'. Normally you wouldn't want
-to do that; but the Makefiles do this when you rebuild XEmacs using
-`make all-elc', which builds XEmacs and simultaneously compiles any
-out-of-date Lisp files. (You need `xemacs' in order to compile Lisp
-files. However, you also need the compiled Lisp files in order to dump
-out `xemacs'. If both of these are missing or corrupted, you are out
-of luck unless you're able to bootstrap `xemacs' from `temacs'. Note
-that `make all-elc' actually loads the alternative loadup file
-`loadup-el.el', which works like `loadup.el' but disables the
-pure-copying process and forces XEmacs to ignore any compiled Lisp
-files even if they exist.)
-
- You can specify additional files to preload by writing a library
-named `site-load.el' that loads them. You may need to increase the
-value of `PURESIZE', in `src/puresize.h', to make room for the
-additional files. You should _not_ modify this file directly, however;
-instead, use the `--puresize' configuration option. (If you run out of
-pure space while dumping `xemacs', you will be told how much pure space
-you actually will need.) However, the advantage of preloading
-additional files decreases as machines get faster. On modern machines,
-it is often not advisable, especially if the Lisp code is on a file
-system local to the machine running XEmacs.
-
- You can specify other Lisp expressions to execute just before dumping
-by putting them in a library named `site-init.el'. However, if they
-might alter the behavior that users expect from an ordinary unmodified
-XEmacs, it is better to put them in `default.el', so that users can
-override them if they wish. *Note Start-up Summary::.
-
- Before `loadup.el' dumps the new executable, it finds the
-documentation strings for primitive and preloaded functions (and
-variables) in the file where they are stored, by calling
-`Snarf-documentation' (*note Accessing Documentation::). These strings
-were moved out of the `xemacs' executable to make it smaller. *Note
-Documentation Basics::.
-
- - Function: dump-emacs to-file from-file
- This function dumps the current state of XEmacs into an executable
- file TO-FILE. It takes symbols from FROM-FILE (this is normally
- the executable file `temacs').
-
- If you use this function in an XEmacs that was already dumped, you
- must set `command-line-processed' to `nil' first for good results.
- *Note Command Line Arguments::.
-
- - Function: run-emacs-from-temacs &rest args
- This is the function that implements the `run-temacs' command-line
- argument. It is called from `loadup.el' as appropriate. You
- should most emphatically _not_ call this yourself; it will
- reinitialize your XEmacs process and you'll be sorry.
-
- - Command: emacs-version
- This function returns a string describing the version of XEmacs
- that is running. It is useful to include this string in bug
- reports.
-
- (emacs-version)
- => "XEmacs 20.1 [Lucid] (i586-unknown-linux2.0.29)
- of Mon Apr 7 1997 on altair.xemacs.org"
-
- Called interactively, the function prints the same information in
- the echo area.
-
- - Variable: emacs-build-time
- The value of this variable is the time at which XEmacs was built
- at the local site.
-
- emacs-build-time "Mon Apr 7 20:28:52 1997"
- =>
-
- - Variable: emacs-version
- The value of this variable is the version of Emacs being run. It
- is a string, e.g. `"20.1 XEmacs Lucid"'.
-
- The following two variables did not exist before FSF GNU Emacs
-version 19.23 and XEmacs version 19.10, which reduces their usefulness
-at present, but we hope they will be convenient in the future.
-
- - Variable: emacs-major-version
- The major version number of Emacs, as an integer. For XEmacs
- version 20.1, the value is 20.
-
- - Variable: emacs-minor-version
- The minor version number of Emacs, as an integer. For XEmacs
- version 20.1, the value is 1.
+File: lispref.info, Node: libpq Lisp Symbols and DataTypes, Next: Synchronous Interface Functions, Prev: libpq Lisp Variables, Up: XEmacs PostgreSQL libpq API
-\1f
-File: lispref.info, Node: Pure Storage, Next: Garbage Collection, Prev: Building XEmacs, Up: Building XEmacs and Object Allocation
-
-Pure Storage
-============
-
- XEmacs Lisp uses two kinds of storage for user-created Lisp objects:
-"normal storage" and "pure storage". Normal storage is where all the
-new data created during an XEmacs session is kept; see the following
-section for information on normal storage. Pure storage is used for
-certain data in the preloaded standard Lisp files--data that should
-never change during actual use of XEmacs.
-
- Pure storage is allocated only while `temacs' is loading the
-standard preloaded Lisp libraries. In the file `xemacs', it is marked
-as read-only (on operating systems that permit this), so that the
-memory space can be shared by all the XEmacs jobs running on the machine
-at once. Pure storage is not expandable; a fixed amount is allocated
-when XEmacs is compiled, and if that is not sufficient for the preloaded
-libraries, `temacs' aborts with an error message. If that happens, you
-must increase the compilation parameter `PURESIZE' using the
-`--puresize' option to `configure'. This normally won't happen unless
-you try to preload additional libraries or add features to the standard
-ones.
-
- - Function: purecopy object
- This function makes a copy of OBJECT in pure storage and returns
- it. It copies strings by simply making a new string with the same
- characters in pure storage. It recursively copies the contents of
- vectors and cons cells. It does not make copies of other objects
- such as symbols, but just returns them unchanged. It signals an
- error if asked to copy markers.
-
- This function is a no-op except while XEmacs is being built and
- dumped; it is usually called only in the file
- `xemacs/lisp/prim/loaddefs.el', but a few packages call it just in
- case you decide to preload them.
-
- - Variable: pure-bytes-used
- The value of this variable is the number of bytes of pure storage
- allocated so far. Typically, in a dumped XEmacs, this number is
- very close to the total amount of pure storage available--if it
- were not, we would preallocate less.
-
- - Variable: purify-flag
- This variable determines whether `defun' should make a copy of the
- function definition in pure storage. If it is non-`nil', then the
- function definition is copied into pure storage.
-
- This flag is `t' while loading all of the basic functions for
- building XEmacs initially (allowing those functions to be sharable
- and non-collectible). Dumping XEmacs as an executable always
- writes `nil' in this variable, regardless of the value it actually
- has before and after dumping.
-
- You should not change this flag in a running XEmacs.
-
-\1f
-File: lispref.info, Node: Garbage Collection, Prev: Pure Storage, Up: Building XEmacs and Object Allocation
-
-Garbage Collection
-==================
-
- When a program creates a list or the user defines a new function
-(such as by loading a library), that data is placed in normal storage.
-If normal storage runs low, then XEmacs asks the operating system to
-allocate more memory in blocks of 2k bytes. Each block is used for one
-type of Lisp object, so symbols, cons cells, markers, etc., are
-segregated in distinct blocks in memory. (Vectors, long strings,
-buffers and certain other editing types, which are fairly large, are
-allocated in individual blocks, one per object, while small strings are
-packed into blocks of 8k bytes. [More correctly, a string is allocated
-in two sections: a fixed size chunk containing the length, list of
-extents, etc.; and a chunk containing the actual characters in the
-string. It is this latter chunk that is either allocated individually
-or packed into 8k blocks. The fixed size chunk is packed into 2k
-blocks, as for conses, markers, etc.])
-
- It is quite common to use some storage for a while, then release it
-by (for example) killing a buffer or deleting the last pointer to an
-object. XEmacs provides a "garbage collector" to reclaim this
-abandoned storage. (This name is traditional, but "garbage recycler"
-might be a more intuitive metaphor for this facility.)
-
- The garbage collector operates by finding and marking all Lisp
-objects that are still accessible to Lisp programs. To begin with, it
-assumes all the symbols, their values and associated function
-definitions, and any data presently on the stack, are accessible. Any
-objects that can be reached indirectly through other accessible objects
-are also accessible.
-
- When marking is finished, all objects still unmarked are garbage. No
-matter what the Lisp program or the user does, it is impossible to refer
-to them, since there is no longer a way to reach them. Their space
-might as well be reused, since no one will miss them. The second
-("sweep") phase of the garbage collector arranges to reuse them.
-
- The sweep phase puts unused cons cells onto a "free list" for future
-allocation; likewise for symbols, markers, extents, events, floats,
-compiled-function objects, and the fixed-size portion of strings. It
-compacts the accessible small string-chars chunks so they occupy fewer
-8k blocks; then it frees the other 8k blocks. Vectors, buffers,
-windows, and other large objects are individually allocated and freed
-using `malloc' and `free'.
-
- Common Lisp note: unlike other Lisps, XEmacs Lisp does not call
- the garbage collector when the free list is empty. Instead, it
- simply requests the operating system to allocate more storage, and
- processing continues until `gc-cons-threshold' bytes have been
- used.
-
- This means that you can make sure that the garbage collector will
- not run during a certain portion of a Lisp program by calling the
- garbage collector explicitly just before it (provided that portion
- of the program does not use so much space as to force a second
- garbage collection).
-
- - Command: garbage-collect
- This command runs a garbage collection, and returns information on
- the amount of space in use. (Garbage collection can also occur
- spontaneously if you use more than `gc-cons-threshold' bytes of
- Lisp data since the previous garbage collection.)
-
- `garbage-collect' returns a list containing the following
- information:
-
- ((USED-CONSES . FREE-CONSES)
- (USED-SYMS . FREE-SYMS)
- (USED-MARKERS . FREE-MARKERS)
- USED-STRING-CHARS
- USED-VECTOR-SLOTS
- (PLIST))
-
- => ((73362 . 8325) (13718 . 164)
- (5089 . 5098) 949121 118677
- (conses-used 73362 conses-free 8329 cons-storage 658168
- symbols-used 13718 symbols-free 164 symbol-storage 335216
- bit-vectors-used 0 bit-vectors-total-length 0
- bit-vector-storage 0 vectors-used 7882
- vectors-total-length 118677 vector-storage 537764
- compiled-functions-used 1336 compiled-functions-free 37
- compiled-function-storage 44440 short-strings-used 28829
- long-strings-used 2 strings-free 7722
- short-strings-total-length 916657 short-string-storage 1179648
- long-strings-total-length 32464 string-header-storage 441504
- floats-used 3 floats-free 43 float-storage 2044 markers-used 5089
- markers-free 5098 marker-storage 245280 events-used 103
- events-free 835 event-storage 110656 extents-used 10519
- extents-free 2718 extent-storage 372736
- extent-auxiliarys-used 111 extent-auxiliarys-freed 3
- extent-auxiliary-storage 4440 window-configurations-used 39
- window-configurations-on-free-list 5
- window-configurations-freed 10 window-configuration-storage 9492
- popup-datas-used 3 popup-data-storage 72 toolbar-buttons-used 62
- toolbar-button-storage 4960 toolbar-datas-used 12
- toolbar-data-storage 240 symbol-value-buffer-locals-used 182
- symbol-value-buffer-local-storage 5824
- symbol-value-lisp-magics-used 22
- symbol-value-lisp-magic-storage 1496
- symbol-value-varaliases-used 43
- symbol-value-varalias-storage 1032 opaque-lists-used 2
- opaque-list-storage 48 color-instances-used 12
- color-instance-storage 288 font-instances-used 5
- font-instance-storage 180 opaques-used 11 opaque-storage 312
- range-tables-used 1 range-table-storage 16 faces-used 34
- face-storage 2584 glyphs-used 124 glyph-storage 4464
- specifiers-used 775 specifier-storage 43869 weak-lists-used 786
- weak-list-storage 18864 char-tables-used 40
- char-table-storage 41920 buffers-used 25 buffer-storage 7000
- extent-infos-used 457 extent-infos-freed 73
- extent-info-storage 9140 keymaps-used 275 keymap-storage 12100
- consoles-used 4 console-storage 384 command-builders-used 2
- command-builder-storage 120 devices-used 2 device-storage 344
- frames-used 3 frame-storage 624 image-instances-used 47
- image-instance-storage 3008 windows-used 27 windows-freed 2
- window-storage 9180 lcrecord-lists-used 15
- lcrecord-list-storage 360 hash-tables-used 631
- hash-table-storage 25240 streams-used 1 streams-on-free-list 3
- streams-freed 12 stream-storage 91))
-
- Here is a table explaining each element:
-
- USED-CONSES
- The number of cons cells in use.
-
- FREE-CONSES
- The number of cons cells for which space has been obtained
- from the operating system, but that are not currently being
- used.
-
- USED-SYMS
- The number of symbols in use.
-
- FREE-SYMS
- The number of symbols for which space has been obtained from
- the operating system, but that are not currently being used.
-
- USED-MARKERS
- The number of markers in use.
-
- FREE-MARKERS
- The number of markers for which space has been obtained from
- the operating system, but that are not currently being used.
-
- USED-STRING-CHARS
- The total size of all strings, in characters.
-
- USED-VECTOR-SLOTS
- The total number of elements of existing vectors.
-
- PLIST
- A list of alternating keyword/value pairs providing more
- detailed information. (As you can see above, quite a lot of
- information is provided.)
-
- - User Option: gc-cons-threshold
- The value of this variable is the number of bytes of storage that
- must be allocated for Lisp objects after one garbage collection in
- order to trigger another garbage collection. A cons cell counts
- as eight bytes, a string as one byte per character plus a few
- bytes of overhead, and so on; space allocated to the contents of
- buffers does not count. Note that the subsequent garbage
- collection does not happen immediately when the threshold is
- exhausted, but only the next time the Lisp evaluator is called.
-
- The initial threshold value is 500,000. If you specify a larger
- value, garbage collection will happen less often. This reduces the
- amount of time spent garbage collecting, but increases total
- memory use. You may want to do this when running a program that
- creates lots of Lisp data.
-
- You can make collections more frequent by specifying a smaller
- value, down to 10,000. A value less than 10,000 will remain in
- effect only until the subsequent garbage collection, at which time
- `garbage-collect' will set the threshold back to 10,000. (This does
- not apply if XEmacs was configured with `--debug'. Therefore, be
- careful when setting `gc-cons-threshold' in that case!)
-
- - Function: memory-limit
- This function returns the address of the last byte XEmacs has
- allocated, divided by 1024. We divide the value by 1024 to make
- sure it fits in a Lisp integer.
-
- You can use this to get a general idea of how your actions affect
- the memory usage.
-
- - Variable: pre-gc-hook
- This is a normal hook to be run just before each garbage
- collection. Interrupts, garbage collection, and errors are
- inhibited while this hook runs, so be extremely careful in what
- you add here. In particular, avoid consing, and do not interact
- with the user.
-
- - Variable: post-gc-hook
- This is a normal hook to be run just after each garbage collection.
- Interrupts, garbage collection, and errors are inhibited while
- this hook runs, so be extremely careful in what you add here. In
- particular, avoid consing, and do not interact with the user.
-
- - Variable: gc-message
- This is a string to print to indicate that a garbage collection is
- in progress. This is printed in the echo area. If the selected
- frame is on a window system and `gc-pointer-glyph' specifies a
- value (i.e. a pointer image instance) in the domain of the
- selected frame, the mouse cursor will change instead of this
- message being printed.
-
- - Glyph: gc-pointer-glyph
- This holds the pointer glyph used to indicate that a garbage
- collection is in progress. If the selected window is on a window
- system and this glyph specifies a value (i.e. a pointer image
- instance) in the domain of the selected window, the cursor will be
- changed as specified during garbage collection. Otherwise, a
- message will be printed in the echo area, as controlled by
- `gc-message'. *Note Glyphs::.
-
- If XEmacs was configured with `--debug', you can set the following
-two variables to get direct information about all the allocation that
-is happening in a segment of Lisp code.
-
- - Variable: debug-allocation
- If non-zero, print out information to stderr about all objects
- allocated.
-
- - Variable: debug-allocation-backtrace
- Length (in stack frames) of short backtrace printed out by
- `debug-allocation'.
-
-\1f
-File: lispref.info, Node: Standard Errors, Next: Standard Buffer-Local Variables, Prev: Building XEmacs and Object Allocation, Up: Top
-
-Standard Errors
-***************
-
- Here is the complete list of the error symbols in standard Emacs,
-grouped by concept. The list includes each symbol's message (on the
-`error-message' property of the symbol) and a cross reference to a
-description of how the error can occur.
-
- Each error symbol has an `error-conditions' property that is a list
-of symbols. Normally this list includes the error symbol itself and
-the symbol `error'. Occasionally it includes additional symbols, which
-are intermediate classifications, narrower than `error' but broader
-than a single error symbol. For example, all the errors in accessing
-files have the condition `file-error'.
-
- As a special exception, the error symbol `quit' does not have the
-condition `error', because quitting is not considered an error.
-
- *Note Errors::, for an explanation of how errors are generated and
-handled.
-
-`SYMBOL'
- STRING; REFERENCE.
-
-`error'
- `"error"'
- *Note Errors::.
-
-`quit'
- `"Quit"'
- *Note Quitting::.
-
-`args-out-of-range'
- `"Args out of range"'
- *Note Sequences Arrays Vectors::.
-
-`arith-error'
- `"Arithmetic error"'
- See `/' and `%' in *Note Numbers::.
-
-`beginning-of-buffer'
- `"Beginning of buffer"'
- *Note Motion::.
-
-`buffer-read-only'
- `"Buffer is read-only"'
- *Note Read Only Buffers::.
-
-`cyclic-function-indirection'
- `"Symbol's chain of function indirections contains a loop"'
- *Note Function Indirection::.
-
-`domain-error'
- `"Arithmetic domain error"'
-`end-of-buffer'
- `"End of buffer"'
- *Note Motion::.
-
-`end-of-file'
- `"End of file during parsing"'
- This is not a `file-error'.
- *Note Input Functions::.
-
-`file-error'
- This error and its subcategories do not have error-strings,
- because the error message is constructed from the data items alone
- when the error condition `file-error' is present.
- *Note Files::.
-
-`file-locked'
- This is a `file-error'.
- *Note File Locks::.
-
-`file-already-exists'
- This is a `file-error'.
- *Note Writing to Files::.
-
-`file-supersession'
- This is a `file-error'.
- *Note Modification Time::.
-
-`invalid-byte-code'
- `"Invalid byte code"'
- *Note Byte Compilation::.
-
-`invalid-function'
- `"Invalid function"'
- *Note Classifying Lists::.
-
-`invalid-read-syntax'
- `"Invalid read syntax"'
- *Note Input Functions::.
-
-`invalid-regexp'
- `"Invalid regexp"'
- *Note Regular Expressions::.
-
-`mark-inactive'
- `"The mark is not active now"'
-`no-catch'
- `"No catch for tag"'
- *Note Catch and Throw::.
-
-`overflow-error'
- `"Arithmetic overflow error"'
-`protected-field'
- `"Attempt to modify a protected field"'
-`range-error'
- `"Arithmetic range error"'
-`search-failed'
- `"Search failed"'
- *Note Searching and Matching::.
-
-`setting-constant'
- `"Attempt to set a constant symbol"'
- *Note Variables that Never Change: Constant Variables.
-
-`singularity-error'
- `"Arithmetic singularity error"'
-`tooltalk-error'
- `"ToolTalk error"'
- *Note ToolTalk Support::.
-
-`undefined-keystroke-sequence'
- `"Undefined keystroke sequence"'
-`void-function'
- `"Symbol's function definition is void"'
- *Note Function Cells::.
-
-`void-variable'
- `"Symbol's value as variable is void"'
- *Note Accessing Variables::.
-
-`wrong-number-of-arguments'
- `"Wrong number of arguments"'
- *Note Classifying Lists::.
-
-`wrong-type-argument'
- `"Wrong type argument"'
- *Note Type Predicates::.
-
- These error types, which are all classified as special cases of
-`arith-error', can occur on certain systems for invalid use of
-mathematical functions.
-
-`domain-error'
- `"Arithmetic domain error"'
- *Note Math Functions::.
-
-`overflow-error'
- `"Arithmetic overflow error"'
- *Note Math Functions::.
-
-`range-error'
- `"Arithmetic range error"'
- *Note Math Functions::.
-
-`singularity-error'
- `"Arithmetic singularity error"'
- *Note Math Functions::.
-
-`underflow-error'
- `"Arithmetic underflow error"'
- *Note Math Functions::.
-
-\1f
-File: lispref.info, Node: Standard Buffer-Local Variables, Next: Standard Keymaps, Prev: Standard Errors, Up: Top
-
-Buffer-Local Variables
-**********************
-
- The table below lists the general-purpose Emacs variables that are
-automatically local (when set) in each buffer. Many Lisp packages
-define such variables for their internal use; we don't list them here.
-
-`abbrev-mode'
- *note Abbrevs::
-
-`auto-fill-function'
- *note Auto Filling::
-
-`buffer-auto-save-file-name'
- *note Auto-Saving::
-
-`buffer-backed-up'
- *note Backup Files::
-
-`buffer-display-table'
- *note Display Tables::
-
-`buffer-file-format'
- *note Format Conversion::
-
-`buffer-file-name'
- *note Buffer File Name::
-
-`buffer-file-number'
- *note Buffer File Name::
-
-`buffer-file-truename'
- *note Buffer File Name::
-
-`buffer-file-type'
- *note Files and MS-DOS::
-
-`buffer-invisibility-spec'
- *note Invisible Text::
-
-`buffer-offer-save'
- *note Saving Buffers::
-
-`buffer-read-only'
- *note Read Only Buffers::
-
-`buffer-saved-size'
- *note Point::
-
-`buffer-undo-list'
- *note Undo::
-
-`cache-long-line-scans'
- *note Text Lines::
-
-`case-fold-search'
- *note Searching and Case::
+libpq Lisp Symbols and Datatypes
+--------------------------------
-`ctl-arrow'
- *note Usual Display::
+ The following set of symbols are used to represent the intermediate
+states involved in the asynchronous interface.
-`comment-column'
- *note Comments: (emacs)Comments.
+ - Symbol: pgres::polling-failed
+ Undocumented. A fatal error has occurred during processing of an
+ asynchronous operation.
-`default-directory'
- *note System Environment::
+ - Symbol: pgres::polling-reading
+ An intermediate status return during an asynchronous operation. It
+ indicates that one may use `select' before polling again.
-`defun-prompt-regexp'
- *note List Motion::
+ - Symbol: pgres::polling-writing
+ An intermediate status return during an asynchronous operation. It
+ indicates that one may use `select' before polling again.
-`fill-column'
- *note Auto Filling::
+ - Symbol: pgres::polling-ok
+ An asynchronous operation has successfully completed.
-`goal-column'
- *note Moving Point: (emacs)Moving Point.
+ - Symbol: pgres::polling-active
+ An intermediate status return during an asynchronous operation.
+ One can call the poll function again immediately.
-`left-margin'
- *note Indentation::
+ - Function: pq-pgconn conn field
+ CONN A database connection object. FIELD A symbol indicating
+ which field of PGconn to fetch. Possible values are shown in the
+ following table.
+ `pq::db'
+ Database name
-`local-abbrev-table'
- *note Abbrevs::
+ `pq::user'
+ Database user name
-`local-write-file-hooks'
- *note Saving Buffers::
+ `pq::pass'
+ Database user's password
-`major-mode'
- *note Mode Help::
+ `pq::host'
+ Hostname database server is running on
-`mark-active'
- *note The Mark::
+ `pq::port'
+ TCP port number used in the connection
-`mark-ring'
- *note The Mark::
+ `pq::tty'
+ Debugging TTY
-`minor-modes'
- *note Minor Modes::
+ Compatibility note: Debugging TTYs are not used in the
+ XEmacs Lisp API.
-`modeline-format'
- *note Modeline Data::
+ `pq::options'
+ Additional server options
-`modeline-buffer-identification'
- *note Modeline Variables::
+ `pq::status'
+ Connection status. Possible return values are shown in the
+ following table.
+ `pg::connection-ok'
+ The normal, connected status.
-`modeline-format'
- *note Modeline Data::
+ `pg::connection-bad'
+ The connection is not open and the PGconn object needs
+ to be deleted by `pq-finish'.
-`modeline-modified'
- *note Modeline Variables::
+ `pg::connection-started'
+ An asynchronous connection has been started, but is not
+ yet complete.
-`modeline-process'
- *note Modeline Variables::
+ `pg::connection-made'
+ An asynchronous connect has been made, and there is data
+ waiting to be sent.
-`mode-name'
- *note Modeline Variables::
+ `pg::connection-awaiting-response'
+ Awaiting data from the backend during an asynchronous
+ connection.
-`overwrite-mode'
- *note Insertion::
+ `pg::connection-auth-ok'
+ Received authentication, waiting for the backend to
+ start up.
-`paragraph-separate'
- *note Standard Regexps::
+ `pg::connection-setenv'
+ Negotiating environment during an asynchronous
+ connection.
-`paragraph-start'
- *note Standard Regexps::
+ `pq::error-message'
+ The last error message that was delivered to this connection.
-`point-before-scroll'
- Used for communication between mouse commands and scroll-bar
- commands.
+ `pq::backend-pid'
+ The process ID of the backend database server.
-`require-final-newline'
- *note Insertion::
+ The `PGresult' object is used by libpq to encapsulate the results of
+queries. The printed representation takes on four forms. When the
+PGresult object contains tuples from an SQL `SELECT' it will look like:
-`selective-display'
- *note Selective Display::
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[5] - SELECT>
-`selective-display-ellipses'
- *note Selective Display::
+ The number in brackets indicates how many rows of data are available.
+When the PGresult object is the result of a command query that doesn't
+return anything, it will look like:
-`tab-width'
- *note Usual Display::
+ (pq-exec P "CREATE TABLE a_new_table (i int);")
+ => #<PGresult PGRES_COMMAND_OK - CREATE>
-`truncate-lines'
- *note Truncation::
-
-`vc-mode'
- *note Modeline Variables::
+ When either the query is a command-type query that can affect a
+number of different rows, but doesn't return any of them it will look
+like:
+
+ (progn
+ (pq-exec P "INSERT INTO a_new_table VALUES (1);")
+ (pq-exec P "INSERT INTO a_new_table VALUES (2);")
+ (pq-exec P "INSERT INTO a_new_table VALUES (3);")
+ (setq R (pq-exec P "DELETE FROM a_new_table;")))
+ => #<PGresult PGRES_COMMAND_OK[3] - DELETE 3>
+
+ Lastly, when the underlying PGresult object has been deallocated
+directly by `pq-clear' the printed representation will look like:
+
+ (progn
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ (pq-clear R)
+ R)
+ => #<PGresult DEAD>
+
+ The following set of functions are accessors to various data in the
+PGresult object.
+
+ - Function: pq-result-status result
+ Return status of a query result. RESULT is a PGresult object.
+ The return value is one of the symbols in the following table.
+ `pgres::empty-query'
+ A query contained no text. This is usually the result of a
+ recoverable error, or a minor programming error.
+
+ `pgres::command-ok'
+ A query command that doesn't return anything was executed
+ properly by the backend.
+
+ `pgres::tuples-ok'
+ A query command that returns tuples was executed properly by
+ the backend.
+
+ `pgres::copy-out'
+ Copy Out data transfer is in progress.
+
+ `pgres::copy-in'
+ Copy In data transfer is in progress.
+
+ `pgres::bad-response'
+ An unexpected response was received from the backend.
+
+ `pgres::nonfatal-error'
+ Undocumented. This value is returned when the libpq function
+ `PQresultStatus' is called with a NULL pointer.
+
+ `pgres::fatal-error'
+ Undocumented. An error has occurred in processing the query
+ and the operation was not completed.
+
+ - Function: pq-res-status result
+ Return the query result status as a string, not a symbol. RESULT
+ is a PGresult object.
+
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[5] - SELECT>
+ (pq-res-status R)
+ => "PGRES_TUPLES_OK"
+
+ - Function: pq-result-error-message result
+ Return an error message generated by the query, if any. RESULT is
+ a PGresult object.
+
+ (setq R (pq-exec P "SELECT * FROM xemacs-test;"))
+ => <A fatal error is signaled in the echo area>
+ (pq-result-error-message R)
+ => "ERROR: parser: parse error at or near \"-\"
+ "
+
+ - Function: pq-ntuples result
+ Return the number of tuples in the query result. RESULT is a
+ PGresult object.
+
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[5] - SELECT>
+ (pq-ntuples R)
+ => 5
+
+ - Function: pq-nfields result
+ Return the number of fields in each tuple of the query result.
+ RESULT is a PGresult object.
+
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[5] - SELECT>
+ (pq-nfields R)
+ => 3
+
+ - Function: pq-binary-tuples result
+ Returns t if binary tuples are present in the results, nil
+ otherwise. RESULT is a PGresult object.
+
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[5] - SELECT>
+ (pq-binary-tuples R)
+ => nil
+
+ - Function: pq-fname result field-index
+ Returns the name of a specific field. RESULT is a PGresult object.
+ FIELD-INDEX is the number of the column to select from. The first
+ column is number zero.
+
+ (let (i l)
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ (setq i (pq-nfields R))
+ (while (>= (decf i) 0)
+ (push (pq-fname R i) l))
+ l)
+ => ("id" "shikona" "rank")
+
+ - Function: pq-fnumber result field-name
+ Return the field number corresponding to the given field name. -1
+ is returned on a bad field name. RESULT is a PGresult object.
+ FIELD-NAME is a string representing the field name to find.
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[5] - SELECT>
+ (pq-fnumber R "id")
+ => 0
+ (pq-fnumber R "Not a field")
+ => -1
+
+ - Function: pq-ftype result field-num
+ Return an integer code representing the data type of the specified
+ column. RESULT is a PGresult object. FIELD-NUM is the field
+ number.
+
+ The return value of this function is the Object ID (Oid) in the
+ database of the type. Further queries need to be made to various
+ system tables in order to convert this value into something useful.
+
+ - Function: pq-fmod result field-num
+ Return the type modifier code associated with a field. Field
+ numbers start at zero. RESULT is a PGresult object. FIELD-INDEX
+ selects which field to use.
+
+ - Function: pq-fsize result field-index
+ Return size of the given field. RESULT is a PGresult object.
+ FIELD-INDEX selects which field to use.
+
+ (let (i l)
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ (setq i (pq-nfields R))
+ (while (>= (decf i) 0)
+ (push (list (pq-ftype R i) (pq-fsize R i)) l))
+ l)
+ => ((23 23) (25 25) (25 25))
+
+ - Function: pq-get-value result tup-num field-num
+ Retrieve a return value. RESULT is a PGresult object. TUP-NUM
+ selects which tuple to fetch from. FIELD-NUM selects which field
+ to fetch from.
+
+ Both tuples and fields are numbered from zero.
+
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[5] - SELECT>
+ (pq-get-value R 0 1)
+ => "Musashimaru"
+ (pq-get-value R 1 1)
+ => "Dejima"
+ (pq-get-value R 2 1)
+ => "Musoyama"
+
+ - Function: pq-get-length result tup-num field-num
+ Return the length of a specific value. RESULT is a PGresult
+ object. TUP-NUM selects which tuple to fetch from. FIELD-NUM
+ selects which field to fetch from.
+
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[5] - SELECT>
+ (pq-get-length R 0 1)
+ => 11
+ (pq-get-length R 1 1)
+ => 6
+ (pq-get-length R 2 1)
+ => 8
+
+ - Function: pq-get-is-null result tup-num field-num
+ Return t if the specific value is the SQL NULL. RESULT is a
+ PGresult object. TUP-NUM selects which tuple to fetch from.
+ FIELD-NUM selects which field to fetch from.
+
+ - Function: pq-cmd-status result
+ Return a summary string from the query. RESULT is a PGresult
+ object.
+ (pq-exec P "INSERT INTO xemacs_test
+ VALUES (6, 'Wakanohana', 'Yokozuna');")
+ => #<PGresult PGRES_COMMAND_OK[1] - INSERT 542086 1>
+ (pq-cmd-status R)
+ => "INSERT 542086 1"
+ (setq R (pq-exec P "UPDATE xemacs_test SET rank='retired'
+ WHERE shikona='Wakanohana';"))
+ => #<PGresult PGRES_COMMAND_OK[1] - UPDATE 1>
+ (pq-cmd-status R)
+ => "UPDATE 1"
+
+ Note that the first number returned from an insertion, like in the
+ example, is an object ID number and will almost certainly vary from
+ system to system since object ID numbers in Postgres must be unique
+ across all databases.
+
+ - Function: pq-cmd-tuples result
+ Return the number of tuples if the last command was an
+ INSERT/UPDATE/DELETE. If the last command was something else, the
+ empty string is returned. RESULT is a PGresult object.
+
+ (setq R (pq-exec P "INSERT INTO xemacs_test VALUES
+ (7, 'Takanohana', 'Yokuzuna');"))
+ => #<PGresult PGRES_COMMAND_OK[1] - INSERT 38688 1>
+ (pq-cmd-tuples R)
+ => "1"
+ (setq R (pq-exec P "SELECT * from xemacs_test;"))
+ => #<PGresult PGRES_TUPLES_OK[7] - SELECT>
+ (pq-cmd-tuples R)
+ => ""
+ (setq R (pq-exec P "DELETE FROM xemacs_test
+ WHERE shikona LIKE '%hana';"))
+ => #<PGresult PGRES_COMMAND_OK[2] - DELETE 2>
+ (pq-cmd-tuples R)
+ => "2"
+
+ - Function: pq-oid-value result
+ Return the object id of the insertion if the last command was an
+ INSERT. 0 is returned if the last command was not an insertion.
+ RESULT is a PGresult object.
+
+ In the first example, the numbers you will see on your local
+ system will almost certainly be different, however the second
+ number from the right in the unprintable PGresult object and the
+ number returned by `pq-oid-value' should match.
+ (setq R (pq-exec P "INSERT INTO xemacs_test VALUES
+ (8, 'Terao', 'Maegashira');"))
+ => #<PGresult PGRES_COMMAND_OK[1] - INSERT 542089 1>
+ (pq-oid-value R)
+ => 542089
+ (setq R (pq-exec P "SELECT shikona FROM xemacs_test
+ WHERE rank='Maegashira';"))
+ => #<PGresult PGRES_TUPLES_OK[2] - SELECT>
+ (pq-oid-value R)
+ => 0
+
+ - Function: pq-make-empty-pgresult conn status
+ Create an empty pgresult with the given status. CONN a database
+ connection object STATUS a value that can be returned by
+ `pq-result-status'.
+
+ The caller is responsible for making sure the return value gets
+ properly freed.
\1f
-File: lispref.info, Node: Standard Keymaps, Next: Standard Hooks, Prev: Standard Buffer-Local Variables, Up: Top
-
-Standard Keymaps
-****************
-
- The following symbols are used as the names for various keymaps.
-Some of these exist when XEmacs is first started, others are loaded
-only when their respective mode is used. This is not an exhaustive
-list.
-
- Almost all of these maps are used as local maps. Indeed, of the
-modes that presently exist, only Vip mode and Terminal mode ever change
-the global keymap.
-
-`bookmark-map'
- A keymap containing bindings to bookmark functions.
-
-`Buffer-menu-mode-map'
- A keymap used by Buffer Menu mode.
-
-`c++-mode-map'
- A keymap used by C++ mode.
-
-`c-mode-map'
- A keymap used by C mode. A sparse keymap used by C mode.
-
-`command-history-map'
- A keymap used by Command History mode.
-
-`ctl-x-4-map'
- A keymap for subcommands of the prefix `C-x 4'.
-
-`ctl-x-5-map'
- A keymap for subcommands of the prefix `C-x 5'.
-
-`ctl-x-map'
- A keymap for `C-x' commands.
-
-`debugger-mode-map'
- A keymap used by Debugger mode.
-
-`dired-mode-map'
- A keymap for `dired-mode' buffers.
-
-`edit-abbrevs-map'
- A keymap used in `edit-abbrevs'.
-
-`edit-tab-stops-map'
- A keymap used in `edit-tab-stops'.
-
-`electric-buffer-menu-mode-map'
- A keymap used by Electric Buffer Menu mode.
-
-`electric-history-map'
- A keymap used by Electric Command History mode.
-
-`emacs-lisp-mode-map'
- A keymap used by Emacs Lisp mode.
-
-`help-map'
- A keymap for characters following the Help key.
-
-`Helper-help-map'
- A keymap used by the help utility package.
- It has the same keymap in its value cell and in its function cell.
-
-`Info-edit-map'
- A keymap used by the `e' command of Info.
-
-`Info-mode-map'
- A keymap containing Info commands.
-
-`isearch-mode-map'
- A keymap that defines the characters you can type within
- incremental search.
-
-`itimer-edit-map'
- A keymap used when in Itimer Edit mode.
-
-`lisp-interaction-mode-map'
- A keymap used by Lisp mode.
-
-`lisp-mode-map'
- A keymap used by Lisp mode.
+File: lispref.info, Node: Synchronous Interface Functions, Next: Asynchronous Interface Functions, Prev: libpq Lisp Symbols and DataTypes, Up: XEmacs PostgreSQL libpq API
+
+Synchronous Interface Functions
+-------------------------------
+
+ - Function: pq-connectdb conninfo
+ Establish a (synchronous) database connection. CONNINFO A string
+ of blank separated options. Options are of the form "OPTION =
+ VALUE". If VALUE contains blanks, it must be single quoted.
+ Blanks around the equal sign are optional. Multiple option
+ assignments are blank separated.
+ (pq-connectdb "dbname=japanese port = 25432")
+ => #<PGconn localhost:25432 steve/japanese>
+ The printed representation of a database connection object has four
+ fields. The first field is the hostname where the database server
+ is running (in this case localhost), the second field is the port
+ number, the third field is the database user name, and the fourth
+ field is the name of the database.
+
+ Database connection objects which have been disconnected and will
+ generate an immediate error if they are used look like:
+ #<PGconn BAD>
+ Bad connections can be reestablished with `pq-reset', or deleted
+ entirely with `pq-finish'.
+
+ A database connection object that has been deleted looks like:
+ (let ((P1 (pq-connectdb "")))
+ (pq-finish P1)
+ P1)
+ => #<PGconn DEAD>
+
+ Note that database connection objects are the most heavy weight
+ objects in XEmacs Lisp at this writing, usually representing as
+ much as several megabytes of virtual memory on the machine the
+ database server is running on. It is wisest to explicitly delete
+ them when you are finished with them, rather than letting garbage
+ collection do it. An example idiom is:
+
+ (let ((P (pq-connectiondb "")))
+ (unwind-protect
+ (progn
+ (...)) ; access database here
+ (pq-finish P)))
+
+ The following options are available in the options string:
+ `authtype'
+ Authentication type. Same as PGAUTHTYPE. This is no longer
+ used.
- A keymap for minibuffer input with completion.
+ `user'
+ Database user name. Same as PGUSER.
-`minibuffer-local-isearch-map'
- A keymap for editing isearch strings in the minibuffer.
+ `password'
+ Database password.
-`minibuffer-local-map'
- Default keymap to use when reading from the minibuffer.
+ `dbname'
+ Database name. Same as PGDATABASE
-`minibuffer-local-must-match-map'
- A keymap for minibuffer input with completion, for exact match.
+ `host'
+ Symbolic hostname. Same as PGHOST.
-`mode-specific-map'
- The keymap for characters following `C-c'. Note, this is in the
- global map. This map is not actually mode specific: its name was
- chosen to be informative for the user in `C-h b'
- (`display-bindings'), where it describes the main use of the `C-c'
- prefix key.
+ `hostaddr'
+ Host address as four octets (eg. like 192.168.1.1).
-`modeline-map'
- The keymap consulted for mouse-clicks on the modeline of a window.
+ `port'
+ TCP port to connect to. Same as PGPORT.
-`objc-mode-map'
- A keymap used in Objective C mode as a local map.
+ `tty'
+ Debugging TTY. Same as PGTTY. This value is suppressed in
+ the XEmacs Lisp API.
-`occur-mode-map'
- A local keymap used by Occur mode.
+ `options'
+ Extra backend database options. Same as PGOPTIONS. A
+ database connection object is returned regardless of whether a
+ connection was established or not.
-`overriding-local-map'
- A keymap that overrides all other local keymaps.
+ - Function: pq-reset conn
+ Reestablish database connection. CONN A database connection
+ object.
-`query-replace-map'
- A local keymap used for responses in `query-replace' and related
- commands; also for `y-or-n-p' and `map-y-or-n-p'. The functions
- that use this map do not support prefix keys; they look up one
- event at a time.
+ This function reestablishes a database connection using the
+ original connection parameters. This is useful if something has
+ happened to the TCP link and it has become broken.
-`read-expression-map'
- The minibuffer keymap used for reading Lisp expressions.
+ - Function: pq-exec conn query
+ Make a synchronous database query. CONN A database connection
+ object. QUERY A string containing an SQL query. A PGresult
+ object is returned, which in turn may be queried by its many
+ accessor functions to retrieve state out of it. If the query
+ string contains multiple SQL commands, only results from the final
+ command are returned.
-`read-shell-command-map'
- The minibuffer keymap used by shell-command and related commands.
+ (setq R (pq-exec P "SELECT * FROM xemacs_test;
+ DELETE FROM xemacs_test WHERE id=8;"))
+ => #<PGresult PGRES_COMMAND_OK[1] - DELETE 1>
-`shared-lisp-mode-map'
- A keymap for commands shared by all sorts of Lisp modes.
+ - Function: pq-notifies conn
+ Return the latest async notification that has not yet been handled.
+ CONN A database connection object. If there has been a
+ notification, then a list of two elements will be returned. The
+ first element contains the relation name being notified, the second
+ element contains the backend process ID number. nil is returned
+ if there aren't any notifications to process.
-`text-mode-map'
- A keymap used by Text mode.
+ - Function: PQsetenv conn
+ Synchronous transfer of environment variables to a backend CONN A
+ database connection object.
-`toolbar-map'
- The keymap consulted for mouse-clicks over a toolbar.
+ Environment variable transfer is done as a normal part of database
+ connection.
-`view-mode-map'
- A keymap used by View mode.
+ Compatibility note: This function was present but not documented
+ in versions of libpq prior to 7.0.
\1f
-File: lispref.info, Node: Standard Hooks, Next: Index, Prev: Standard Keymaps, Up: Top
-
-Standard Hooks
-**************
-
- The following is a list of hook variables that let you provide
-functions to be called from within Emacs on suitable occasions.
-
- Most of these variables have names ending with `-hook'. They are
-"normal hooks", run by means of `run-hooks'. The value of such a hook
-is a list of functions. The recommended way to put a new function on
-such a hook is to call `add-hook'. *Note Hooks::, for more information
-about using hooks.
-
- The variables whose names end in `-function' have single functions
-as their values. Usually there is a specific reason why the variable is
-not a normal hook, such as the need to pass arguments to the function.
-(In older Emacs versions, some of these variables had names ending in
-`-hook' even though they were not normal hooks.)
-
- The variables whose names end in `-hooks' or `-functions' have lists
-of functions as their values, but these functions are called in a
-special way (they are passed arguments, or else their values are used).
-
-`activate-menubar-hook'
-
-`activate-popup-menu-hook'
-
-`ad-definition-hooks'
-
-`adaptive-fill-function'
-
-`add-log-current-defun-function'
-
-`after-change-functions'
-
-`after-delete-annotation-hook'
-
-`after-init-hook'
-
-`after-insert-file-functions'
-
-`after-revert-hook'
-
-`after-save-hook'
-
-`after-set-visited-file-name-hooks'
-
-`after-write-file-hooks'
-
-`auto-fill-function'
-
-`auto-save-hook'
-
-`before-change-functions'
-
-`before-delete-annotation-hook'
-
-`before-init-hook'
-
-`before-revert-hook'
-
-`blink-paren-function'
-
-`buffers-menu-switch-to-buffer-function'
-
-`c++-mode-hook'
-
-`c-delete-function'
-
-`c-mode-common-hook'
-
-`c-mode-hook'
-
-`c-special-indent-hook'
-
-`calendar-load-hook'
-
-`change-major-mode-hook'
-
-`command-history-hook'
-
-`comment-indent-function'
-
-`compilation-buffer-name-function'
-
-`compilation-exit-message-function'
-
-`compilation-finish-function'
-
-`compilation-parse-errors-function'
-
-`compilation-mode-hook'
-
-`create-console-hook'
-
-`create-device-hook'
-
-`create-frame-hook'
-
-`dabbrev-friend-buffer-function'
-
-`dabbrev-select-buffers-function'
-
-`delete-console-hook'
-
-`delete-device-hook'
-
-`delete-frame-hook'
-
-`deselect-frame-hook'
-
-`diary-display-hook'
-
-`diary-hook'
-
-`dired-after-readin-hook'
-
-`dired-before-readin-hook'
-
-`dired-load-hook'
-
-`dired-mode-hook'
-
-`disabled-command-hook'
-
-`display-buffer-function'
-
-`ediff-after-setup-control-frame-hook'
-
-`ediff-after-setup-windows-hook'
-
-`ediff-before-setup-control-frame-hook'
-
-`ediff-before-setup-windows-hook'
-
-`ediff-brief-help-message-function'
-
-`ediff-cleanup-hook'
+File: lispref.info, Node: Asynchronous Interface Functions, Next: Large Object Support, Prev: Synchronous Interface Functions, Up: XEmacs PostgreSQL libpq API
-`ediff-control-frame-position-function'
+Asynchronous Interface Functions
+--------------------------------
-`ediff-display-help-hook'
+ Making command by command examples is too complex with the
+asynchronous interface functions. See the examples section for
+complete calling sequences.
-`ediff-focus-on-regexp-matches-function'
+ - Function: pq-connect-start conninfo
+ Begin establishing an asynchronous database connection. CONNINFO
+ A string containing the connection options. See the documentation
+ of `pq-connectdb' for a listing of all the available flags.
-`ediff-forward-word-function'
+ - Function: pq-connect-poll conn
+ An intermediate function to be called during an asynchronous
+ database connection. CONN A database connection object. The
+ result codes are documented in a previous section.
-`ediff-hide-regexp-matches-function'
+ - Function: pq-is-busy conn
+ Returns t if `pq-get-result' would block waiting for input. CONN
+ A database connection object.
-`ediff-keymap-setup-hook'
+ - Function: pq-consume-input conn
+ Consume any available input from the backend. CONN A database
+ connection object.
-`ediff-load-hook'
+ Nil is returned if anything bad happens.
-`ediff-long-help-message-function'
+ - Function: pq-reset-start conn
+ Reset connection to the backend asynchronously. CONN A database
+ connection object.
-`ediff-make-wide-display-function'
+ - Function: pq-reset-poll conn
+ Poll an asynchronous reset for completion CONN A database
+ connection object.
-`ediff-merge-split-window-function'
+ - Function: pq-reset-cancel conn
+ Attempt to request cancellation of the current operation. CONN A
+ database connection object.
-`ediff-meta-action-function'
+ The return value is t if the cancel request was successfully
+ dispatched, nil if not (in which case conn->errorMessage is set).
+ Note: successful dispatch is no guarantee that there will be any
+ effect at the backend. The application must read the operation
+ result as usual.
-`ediff-meta-redraw-function'
+ - Function: pq-send-query conn query
+ Submit a query to Postgres and don't wait for the result. CONN A
+ database connection object. Returns: t if successfully submitted
+ nil if error (conn->errorMessage is set)
-`ediff-mode-hook'
+ - Function: pq-get-result conn
+ Retrieve an asynchronous result from a query. CONN A database
+ connection object.
-`ediff-prepare-buffer-hook'
+ `nil' is returned when no more query work remains.
-`ediff-quit-hook'
+ - Function: pq-set-nonblocking conn arg
+ Sets the PGconn's database connection non-blocking if the arg is
+ TRUE or makes it non-blocking if the arg is FALSE, this will not
+ protect you from PQexec(), you'll only be safe when using the
+ non-blocking API. CONN A database connection object.
-`ediff-registry-setup-hook'
+ - Function: pq-is-nonblocking conn
+ Return the blocking status of the database connection CONN A
+ database connection object.
-`ediff-select-hook'
+ - Function: pq-flush conn
+ Force the write buffer to be written (or at least try) CONN A
+ database connection object.
-`ediff-session-action-function'
+ - Function: PQsetenvStart conn
+ Start asynchronously passing environment variables to a backend.
+ CONN A database connection object.
-`ediff-session-group-setup-hook'
+ Compatibility note: this function is only available with libpq-7.0.
-`ediff-setup-diff-regions-function'
+ - Function: PQsetenvPoll conn
+ Check an asynchronous environment variables transfer for
+ completion. CONN A database connection object.
-`ediff-show-registry-hook'
+ Compatibility note: this function is only available with libpq-7.0.
-`ediff-show-session-group-hook'
+ - Function: PQsetenvAbort conn
+ Attempt to terminate an asynchronous environment variables
+ transfer. CONN A database connection object.
-`ediff-skip-diff-region-function'
+ Compatibility note: this function is only available with libpq-7.0.
-`ediff-split-window-function'
-
-`ediff-startup-hook'
-
-`ediff-suspend-hook'
-
-`ediff-toggle-read-only-function'
-
-`ediff-unselect-hook'
-
-`ediff-window-setup-function'
-
-`edit-picture-hook'
-
-`electric-buffer-menu-mode-hook'
-
-`electric-command-history-hook'
-
-`electric-help-mode-hook'
-
-`emacs-lisp-mode-hook'
-
-`fill-paragraph-function'
-
-`find-file-hooks'
-
-`find-file-not-found-hooks'
-
-`first-change-hook'
-
-`font-lock-after-fontify-buffer-hook'
-
-`font-lock-beginning-of-syntax-function'
-
-`font-lock-mode-hook'
-
-`fume-found-function-hook'
-
-`fume-list-mode-hook'
-
-`fume-rescan-buffer-hook'
-
-`fume-sort-function'
-
-`gnus-startup-hook'
-
-`hack-local-variables-hook'
-
-`highlight-headers-follow-url-function'
-
-`hyper-apropos-mode-hook'
-
-`indent-line-function'
-
-`indent-mim-hook'
-
-`indent-region-function'
-
-`initial-calendar-window-hook'
-
-`isearch-mode-end-hook'
-
-`isearch-mode-hook'
-
-`java-mode-hook'
-
-`kill-buffer-hook'
-
-`kill-buffer-query-functions'
-
-`kill-emacs-hook'
-
-`kill-emacs-query-functions'
-
-`kill-hooks'
-
-`LaTeX-mode-hook'
-
-`latex-mode-hook'
-
-`ledit-mode-hook'
-
-`lisp-indent-function'
-
-`lisp-interaction-mode-hook'
-
-`lisp-mode-hook'
-
-`list-diary-entries-hook'
-
-`load-read-function'
-
-`log-message-filter-function'
-
-`m2-mode-hook'
-
-`mail-citation-hook'
-
-`mail-mode-hook'
-
-`mail-setup-hook'
-
-`make-annotation-hook'
-
-`makefile-mode-hook'
-
-`map-frame-hook'
-
-`mark-diary-entries-hook'
-
-`medit-mode-hook'
-
-`menu-no-selection-hook'
-
-`mh-compose-letter-hook'
-
-`mh-folder-mode-hook'
-
-`mh-letter-mode-hook'
-
-`mim-mode-hook'
-
-`minibuffer-exit-hook'
-
-`minibuffer-setup-hook'
-
-`mode-motion-hook'
-
-`mouse-enter-frame-hook'
-
-`mouse-leave-frame-hook'
-
-`mouse-track-cleanup-hook'
-
-`mouse-track-click-hook'
-
-`mouse-track-down-hook'
-
-`mouse-track-drag-hook'
-
-`mouse-track-drag-up-hook'
-
-`mouse-track-up-hook'
-
-`mouse-yank-function'
-
-`news-mode-hook'
-
-`news-reply-mode-hook'
-
-`news-setup-hook'
-
-`nongregorian-diary-listing-hook'
-
-`nongregorian-diary-marking-hook'
-
-`nroff-mode-hook'
-
-`objc-mode-hook'
-
-`outline-mode-hook'
-
-`perl-mode-hook'
-
-`plain-TeX-mode-hook'
-
-`post-command-hook'
-
-`post-gc-hook'
-
-`pre-abbrev-expand-hook'
-
-`pre-command-hook'
-
-`pre-display-buffer-function'
-
-`pre-gc-hook'
-
-`pre-idle-hook'
-
-`print-diary-entries-hook'
-
-`prolog-mode-hook'
-
-`protect-innocence-hook'
-
-`remove-message-hook'
-
-`revert-buffer-function'
-
-`revert-buffer-insert-contents-function'
-
-`rmail-edit-mode-hook'
-
-`rmail-mode-hook'
-
-`rmail-retry-setup-hook'
-
-`rmail-summary-mode-hook'
-
-`scheme-indent-hook'
-
-`scheme-mode-hook'
-
-`scribe-mode-hook'
-
-`select-frame-hook'
-
-`send-mail-function'
-
-`shell-mode-hook'
-
-`shell-set-directory-error-hook'
+\1f
+File: lispref.info, Node: Large Object Support, Next: Other libpq Functions, Prev: Asynchronous Interface Functions, Up: XEmacs PostgreSQL libpq API
-`special-display-function'
+Large Object Support
+--------------------
-`suspend-hook'
+ - Function: pq-lo-import conn filename
+ Import a file as a large object into the database. CONN a
+ database connection object FILENAME filename to import
-`suspend-resume-hook'
+ On success, the object id is returned.
-`temp-buffer-show-function'
+ - Function: pq-lo-export conn oid filename
+ Copy a large object in the database into a file. CONN a database
+ connection object. OID object id number of a large object.
+ FILENAME filename to export to.
-`term-setup-hook'
+\1f
+File: lispref.info, Node: Other libpq Functions, Next: Unimplemented libpq Functions, Prev: Large Object Support, Up: XEmacs PostgreSQL libpq API
+
+Other libpq Functions
+---------------------
+
+ - Function: pq-finish conn
+ Destroy a database connection object by calling free on it. CONN
+ a database connection object
+
+ It is possible to not call this routine because the usual XEmacs
+ garbage collection mechanism will call the underlying libpq
+ routine whenever it is releasing stale `PGconn' objects. However,
+ this routine is useful in `unwind-protect' clauses to make
+ connections go away quickly when unrecoverable errors have
+ occurred.
+
+ After calling this routine, the printed representation of the
+ XEmacs wrapper object will contain the string "DEAD".
+
+ - Function: pq-client-encoding conn
+ Return the client encoding as an integer code. CONN a database
+ connection object
+
+ (pq-client-encoding P)
+ => 1
+
+ Compatibility note: This function did not exist prior to libpq-7.0
+ and does not exist in a non-Mule XEmacs.
+
+ - Function: pq-set-client-encoding conn encoding
+ Set client coding system. CONN a database connection object
+ ENCODING a string representing the desired coding system
+
+ (pq-set-client-encoding P "EUC_JP")
+ => 0
+
+ The current idiom for ensuring proper coding system conversion is
+ the following (illustrated for EUC Japanese encoding):
+ (setq P (pq-connectdb "..."))
+ (let ((file-name-coding-system 'euc-jp)
+ (pg-coding-system 'euc-jp))
+ (pq-set-client-encoding "EUC_JP")
+ ...)
+ (pq-finish P)
+ Compatibility note: This function did not exist prior to libpq-7.0
+ and does not exist in a non-Mule XEmacs.
+
+ - Function: pq-env-2-encoding
+ Return the integer code representing the coding system in
+ PGCLIENTENCODING.
+
+ (pq-env-2-encoding)
+ => 0
+ Compatibility note: This function did not exist prior to libpq-7.0
+ and does not exist in a non-Mule XEmacs.
+
+ - Function: pq-clear res
+ Destroy a query result object by calling free() on it. RES a
+ query result object
+
+ Note: The memory allocation systems of libpq and XEmacs are
+ different. The XEmacs representation of a query result object
+ will have both the XEmacs version and the libpq version freed at
+ the next garbage collection when the object is no longer being
+ referenced. Calling this function does not release the XEmacs
+ object, it is still subject to the usual rules for Lisp objects.
+ The printed representation of the XEmacs object will contain the
+ string "DEAD" after this routine is called indicating that it is no
+ longer useful for anything.
+
+ - Function: pq-conn-defaults
+ Return a data structure that represents the connection defaults.
+ The data is returned as a list of lists, where each sublist
+ contains info regarding a single option.
-`terminal-mode-hook'
+\1f
+File: lispref.info, Node: Unimplemented libpq Functions, Prev: Other libpq Functions, Up: XEmacs PostgreSQL libpq API
+
+Unimplemented libpq Functions
+-----------------------------
+
+ - Unimplemented Function: PGconn *PQsetdbLogin (char *pghost, char
+ *pgport, char *pgoptions, char *pgtty, char *dbName, char
+ *login, char *pwd)
+ Synchronous database connection. PGHOST is the hostname of the
+ PostgreSQL backend to connect to. PGPORT is the TCP port number
+ to use. PGOPTIONS specifies other backend options. PGTTY
+ specifies the debugging tty to use. DBNAME specifies the database
+ name to use. LOGIN specifies the database user name. PWD
+ specifies the database user's password.
+
+ This routine is deprecated as of libpq-7.0, and its functionality
+ can be replaced by external Lisp code if needed.
+
+ - Unimplemented Function: PGconn *PQsetdb (char *pghost, char *pgport,
+ char *pgoptions, char *pgtty, char *dbName)
+ Synchronous database connection. PGHOST is the hostname of the
+ PostgreSQL backend to connect to. PGPORT is the TCP port number
+ to use. PGOPTIONS specifies other backend options. PGTTY
+ specifies the debugging tty to use. DBNAME specifies the database
+ name to use.
+
+ This routine was deprecated in libpq-6.5.
+
+ - Unimplemented Function: int PQsocket (PGconn *conn)
+ Return socket file descriptor to a backend database process. CONN
+ database connection object.
+
+ - Unimplemented Function: void PQprint (FILE *fout, PGresult *res,
+ PGprintOpt *ps)
+ Print out the results of a query to a designated C stream. FOUT C
+ stream to print to RES the query result object to print PS the
+ print options structure.
+
+ This routine is deprecated as of libpq-7.0 and cannot be sensibly
+ exported to XEmacs Lisp.
+
+ - Unimplemented Function: void PQdisplayTuples (PGresult *res, FILE
+ *fp, int fillAlign, char *fieldSep, int printHeader, int
+ quiet)
+ RES query result object to print FP C stream to print to FILLALIGN
+ pad the fields with spaces FIELDSEP field separator PRINTHEADER
+ display headers? QUIET
+
+ This routine was deprecated in libpq-6.5.
+
+ - Unimplemented Function: void PQprintTuples (PGresult *res, FILE
+ *fout, int printAttName, int terseOutput, int width)
+ RES query result object to print FOUT C stream to print to
+ PRINTATTNAME print attribute names TERSEOUTPUT delimiter bars
+ WIDTH width of column, if 0, use variable width
+
+ This routine was deprecated in libpq-6.5.
+
+ - Unimplemented Function: int PQmblen (char *s, int encoding)
+ Determine length of a multibyte encoded char at `*s'. S encoded
+ string ENCODING type of encoding
+
+ Compatibility note: This function was introduced in libpq-7.0.
+
+ - Unimplemented Function: void PQtrace (PGconn *conn, FILE *debug_port)
+ Enable tracing on `debug_port'. CONN database connection object.
+ DEBUG_PORT C output stream to use.
+
+ - Unimplemented Function: void PQuntrace (PGconn *conn)
+ Disable tracing. CONN database connection object.
+
+ - Unimplemented Function: char *PQoidStatus (PGconn *conn)
+ Return the object id as a string of the last tuple inserted. CONN
+ database connection object.
+
+ Compatibility note: This function is deprecated in libpq-7.0,
+ however it is used internally by the XEmacs binding code when
+ linked against versions prior to 7.0.
+
+ - Unimplemented Function: PGresult *PQfn (PGconn *conn, int fnid, int
+ *result_buf, int *result_len, int result_is_int, PQArgBlock
+ *args, int nargs)
+ "Fast path" interface -- not really recommended for application use
+ CONN A database connection object. FNID RESULT_BUF RESULT_LEN
+ RESULT_IS_INT ARGS NARGS
+
+ The following set of very low level large object functions aren't
+appropriate to be exported to Lisp.
+
+ - Unimplemented Function: int pq-lo-open (PGconn *conn, int lobjid,
+ int mode)
+ CONN a database connection object. LOBJID a large object ID.
+ MODE opening modes.
+
+ - Unimplemented Function: int pq-lo-close (PGconn *conn, int fd)
+ CONN a database connection object. FD a large object file
+ descriptor
+
+ - Unimplemented Function: int pq-lo-read (PGconn *conn, int fd, char
+ *buf, int len)
+ CONN a database connection object. FD a large object file
+ descriptor. BUF buffer to read into. LEN size of buffer.
+
+ - Unimplemented Function: int pq-lo-write (PGconn *conn, int fd, char
+ *buf, size_t len)
+ CONN a database connection object. FD a large object file
+ descriptor. BUF buffer to write from. LEN size of buffer.
+
+ - Unimplemented Function: int pq-lo-lseek (PGconn *conn, int fd, int
+ offset, int whence)
+ CONN a database connection object. FD a large object file
+ descriptor. OFFSET WHENCE
-`terminal-mode-break-hook'
+ - Unimplemented Function: int pq-lo-creat (PGconn *conn, int mode)
+ CONN a database connection object. MODE opening modes.
+
+ - Unimplemented Function: int pq-lo-tell (PGconn *conn, int fd)
+ CONN a database connection object. FD a large object file
+ descriptor.
+
+ - Unimplemented Function: int pq-lo-unlink (PGconn *conn, int lobjid)
+ CONN a database connection object. LBOJID a large object ID.
-`TeX-mode-hook'
+\1f
+File: lispref.info, Node: XEmacs PostgreSQL libpq Examples, Prev: XEmacs PostgreSQL libpq API, Up: PostgreSQL Support
+
+XEmacs PostgreSQL libpq Examples
+================================
+
+ This is an example of one method of establishing an asynchronous
+connection.
+
+ (defun database-poller (P)
+ (message "%S before poll" (pq-pgconn P 'pq::status))
+ (pq-connect-poll P)
+ (message "%S after poll" (pq-pgconn P 'pq::status))
+ (if (eq (pq-pgconn P 'pq::status) 'pg::connection-ok)
+ (message "Done!")
+ (add-timeout .1 'database-poller P)))
+ => database-poller
+ (progn
+ (setq P (pq-connect-start ""))
+ (add-timeout .1 'database-poller P))
+ => pg::connection-started before poll
+ => pg::connection-made after poll
+ => pg::connection-made before poll
+ => pg::connection-awaiting-response after poll
+ => pg::connection-awaiting-response before poll
+ => pg::connection-auth-ok after poll
+ => pg::connection-auth-ok before poll
+ => pg::connection-setenv after poll
+ => pg::connection-setenv before poll
+ => pg::connection-ok after poll
+ => Done!
+ P
+ => #<PGconn localhost:25432 steve/steve>
+
+ Here is an example of one method of doing an asynchronous reset.
+
+ (defun database-poller (P)
+ (let (PS)
+ (message "%S before poll" (pq-pgconn P 'pq::status))
+ (setq PS (pq-reset-poll P))
+ (message "%S after poll [%S]" (pq-pgconn P 'pq::status) PS)
+ (if (eq (pq-pgconn P 'pq::status) 'pg::connection-ok)
+ (message "Done!")
+ (add-timeout .1 'database-poller P))))
+ => database-poller
+ (progn
+ (pq-reset-start P)
+ (add-timeout .1 'database-poller P))
+ => pg::connection-started before poll
+ => pg::connection-made after poll [pgres::polling-writing]
+ => pg::connection-made before poll
+ => pg::connection-awaiting-response after poll [pgres::polling-reading]
+ => pg::connection-awaiting-response before poll
+ => pg::connection-setenv after poll [pgres::polling-reading]
+ => pg::connection-setenv before poll
+ => pg::connection-ok after poll [pgres::polling-ok]
+ => Done!
+ P
+ => #<PGconn localhost:25432 steve/steve>
+
+ And finally, an asynchronous query.
+
+ (defun database-poller (P)
+ (let (R)
+ (pq-consume-input P)
+ (if (pq-is-busy P)
+ (add-timeout .1 'database-poller P)
+ (setq R (pq-get-result P))
+ (if R
+ (progn
+ (push R result-list)
+ (add-timeout .1 'database-poller P))))))
+ => database-poller
+ (when (pq-send-query P "SELECT * FROM xemacs_test;")
+ (setq result-list nil)
+ (add-timeout .1 'database-poller P))
+ => 885
+ ;; wait a moment
+ result-list
+ => (#<PGresult PGRES_TUPLES_OK - SELECT>)
+
+ Here is an example showing how multiple SQL statements in a single
+query can have all their results collected.
+ ;; Using the same `database-poller' function from the previous example
+ (when (pq-send-query P "SELECT * FROM xemacs_test;
+ SELECT * FROM pg_database;
+ SELECT * FROM pg_user;")
+ (setq result-list nil)
+ (add-timeout .1 'database-poller P))
+ => 1782
+ ;; wait a moment
+ result-list
+ => (#<PGresult PGRES_TUPLES_OK - SELECT> #<PGresult PGRES_TUPLES_OK - SELECT> #<PGresult PGRES_TUPLES_OK - SELECT>)
+
+ Here is an example which illustrates collecting all data from a
+query, including the field names.
+
+ (defun pg-util-query-results (results)
+ "Retrieve results of last SQL query into a list structure."
+ (let ((i (1- (pq-ntuples R)))
+ j l1 l2)
+ (while (>= i 0)
+ (setq j (1- (pq-nfields R)))
+ (setq l2 nil)
+ (while (>= j 0)
+ (push (pq-get-value R i j) l2)
+ (decf j))
+ (push l2 l1)
+ (decf i))
+ (setq j (1- (pq-nfields R)))
+ (setq l2 nil)
+ (while (>= j 0)
+ (push (pq-fname R j) l2)
+ (decf j))
+ (push l2 l1)
+ l1))
+ => pg-util-query-results
+ (setq R (pq-exec P "SELECT * FROM xemacs_test ORDER BY field2 DESC;"))
+ => #<PGresult PGRES_TUPLES_OK - SELECT>
+ (pg-util-query-results R)
+ => (("f1" "field2") ("a" "97") ("b" "97") ("stuff" "42") ("a string" "12") ("foo" "10") ("string" "2") ("text" "1"))
+
+ Here is an example of a query that uses a database cursor.
+
+ (let (data R)
+ (setq R (pq-exec P "BEGIN;"))
+ (setq R (pq-exec P "DECLARE k_cursor CURSOR FOR SELECT * FROM xemacs_test ORDER BY f1 DESC;"))
+
+ (setq R (pq-exec P "FETCH k_cursor;"))
+ (while (eq (pq-ntuples R) 1)
+ (push (list (pq-get-value R 0 0) (pq-get-value R 0 1)) data)
+ (setq R (pq-exec P "FETCH k_cursor;")))
+ (setq R (pq-exec P "END;"))
+ data)
+ => (("a" "97") ("a string" "12") ("b" "97") ("foo" "10") ("string" "2") ("stuff" "42") ("text" "1"))
+
+ Here's another example of cursors, this time with a Lisp macro to
+implement a mapping function over a table.
+
+ (defmacro map-db (P table condition callout)
+ `(let (R)
+ (pq-exec ,P "BEGIN;")
+ (pq-exec ,P (concat "DECLARE k_cursor CURSOR FOR SELECT * FROM "
+ ,table
+ " "
+ ,condition
+ " ORDER BY f1 DESC;"))
+ (setq R (pq-exec P "FETCH k_cursor;"))
+ (while (eq (pq-ntuples R) 1)
+ (,callout (pq-get-value R 0 0) (pq-get-value R 0 1))
+ (setq R (pq-exec P "FETCH k_cursor;")))
+ (pq-exec P "END;")))
+ => map-db
+ (defun callback (arg1 arg2)
+ (message "arg1 = %s, arg2 = %s" arg1 arg2))
+ => callback
+ (map-db P "xemacs_test" "WHERE field2 > 10" callback)
+ => arg1 = stuff, arg2 = 42
+ => arg1 = b, arg2 = 97
+ => arg1 = a string, arg2 = 12
+ => arg1 = a, arg2 = 97
+ => #<PGresult PGRES_COMMAND_OK - COMMIT>
-`tex-mode-hook'
+\1f
+File: lispref.info, Node: Internationalization, Next: MULE, Prev: PostgreSQL Support, Up: Top
-`text-mode-hook'
+Internationalization
+********************
-`today-visible-calendar-hook'
+* Menu:
-`today-invisible-calendar-hook'
+* I18N Levels 1 and 2:: Support for different time, date, and currency formats.
+* I18N Level 3:: Support for localized messages.
+* I18N Level 4:: Support for Asian languages.
-`tooltalk-message-handler-hook'
+\1f
+File: lispref.info, Node: I18N Levels 1 and 2, Next: I18N Level 3, Up: Internationalization
-`tooltalk-pattern-handler-hook'
+I18N Levels 1 and 2
+===================
-`tooltalk-unprocessed-message-hook'
+ XEmacs is now compliant with I18N levels 1 and 2. Specifically,
+this means that it is 8-bit clean and correctly handles time and date
+functions. XEmacs will correctly display the entire ISO-Latin 1
+character set.
-`unmap-frame-hook'
+ The compose key may now be used to create any character in the
+ISO-Latin 1 character set not directly available via the keyboard.. In
+order for the compose key to work it is necessary to load the file
+`x-compose.el'. At any time while composing a character, `C-h' will
+display all valid completions and the character which would be produced.
-`vc-checkin-hook'
+\1f
+File: lispref.info, Node: I18N Level 3, Next: I18N Level 4, Prev: I18N Levels 1 and 2, Up: Internationalization
-`vc-checkout-writable-buffer-hook'
+I18N Level 3
+============
-`vc-log-after-operation-hook'
+* Menu:
-`vc-make-buffer-writable-hook'
+* Level 3 Basics::
+* Level 3 Primitives::
+* Dynamic Messaging::
+* Domain Specification::
+* Documentation String Extraction::
-`view-hook'
+\1f
+File: lispref.info, Node: Level 3 Basics, Next: Level 3 Primitives, Up: I18N Level 3
-`vm-arrived-message-hook'
+Level 3 Basics
+--------------
-`vm-arrived-messages-hook'
+ XEmacs now provides alpha-level functionality for I18N Level 3.
+This means that everything necessary for full messaging is available,
+but not every file has been converted.
-`vm-chop-full-name-function'
+ The two message files which have been created are `src/emacs.po' and
+`lisp/packages/mh-e.po'. Both files need to be converted using
+`msgfmt', and the resulting `.mo' files placed in some locale's
+`LC_MESSAGES' directory. The test "translations" in these files are
+the original messages prefixed by `TRNSLT_'.
-`vm-display-buffer-hook'
+ The domain for a variable is stored on the variable's property list
+under the property name VARIABLE-DOMAIN. The function
+`documentation-property' uses this information when translating a
+variable's documentation.
-`vm-edit-message-hook'
+\1f
+File: lispref.info, Node: Level 3 Primitives, Next: Dynamic Messaging, Prev: Level 3 Basics, Up: I18N Level 3
-`vm-forward-message-hook'
+Level 3 Primitives
+------------------
-`vm-iconify-frame-hook'
+ - Function: gettext string
+ This function looks up STRING in the default message domain and
+ returns its translation. If `I18N3' was not enabled when XEmacs
+ was compiled, it just returns STRING.
-`vm-inhibit-write-file-hook'
+ - Function: dgettext domain string
+ This function looks up STRING in the specified message domain and
+ returns its translation. If `I18N3' was not enabled when XEmacs
+ was compiled, it just returns STRING.
-`vm-key-functions'
+ - Function: bind-text-domain domain pathname
+ This function associates a pathname with a message domain. Here's
+ how the path to message file is constructed under SunOS 5.x:
-`vm-mail-hook'
+ `{pathname}/{LANG}/LC_MESSAGES/{domain}.mo'
-`vm-mail-mode-hook'
+ If `I18N3' was not enabled when XEmacs was compiled, this function
+ does nothing.
-`vm-menu-setup-hook'
+ - Special Form: domain string
+ This function specifies the text domain used for translating
+ documentation strings and interactive prompts of a function. For
+ example, write:
-`vm-mode-hook'
+ (defun foo (arg) "Doc string" (domain "emacs-foo") ...)
-`vm-quit-hook'
+ to specify `emacs-foo' as the text domain of the function `foo'.
+ The "call" to `domain' is actually a declaration rather than a
+ function; when actually called, `domain' just returns `nil'.
-`vm-rename-current-buffer-function'
+ - Function: domain-of function
+ This function returns the text domain of FUNCTION; it returns
+ `nil' if it is the default domain. If `I18N3' was not enabled
+ when XEmacs was compiled, it always returns `nil'.
-`vm-reply-hook'
+\1f
+File: lispref.info, Node: Dynamic Messaging, Next: Domain Specification, Prev: Level 3 Primitives, Up: I18N Level 3
-`vm-resend-bounced-message-hook'
+Dynamic Messaging
+-----------------
-`vm-resend-message-hook'
+ The `format' function has been extended to permit you to change the
+order of parameter insertion. For example, the conversion format
+`%1$s' inserts parameter one as a string, while `%2$s' inserts
+parameter two. This is useful when creating translations which require
+you to change the word order.
-`vm-retrieved-spooled-mail-hook'
+\1f
+File: lispref.info, Node: Domain Specification, Next: Documentation String Extraction, Prev: Dynamic Messaging, Up: I18N Level 3
-`vm-select-message-hook'
+Domain Specification
+--------------------
-`vm-select-new-message-hook'
+ The default message domain of XEmacs is `emacs'. For add-on
+packages, it is best to use a different domain. For example, let us
+say we want to convert the "gorilla" package to use the domain
+`emacs-gorilla'. To translate the message "What gorilla?", use
+`dgettext' as follows:
-`vm-select-unread-message-hook'
+ (dgettext "emacs-gorilla" "What gorilla?")
-`vm-send-digest-hook'
+ A function (or macro) which has a documentation string or an
+interactive prompt needs to be associated with the domain in order for
+the documentation or prompt to be translated. This is done with the
+`domain' special form as follows:
-`vm-summary-mode-hook'
+ (defun scratch (location)
+ "Scratch the specified location."
+ (domain "emacs-gorilla")
+ (interactive "sScratch: ")
+ ... )
-`vm-summary-pointer-update-hook'
+ It is most efficient to specify the domain in the first line of the
+function body, before the `interactive' form.
-`vm-summary-redo-hook'
+ For variables and constants which have documentation strings,
+specify the domain after the documentation.
-`vm-summary-update-hook'
+ - Special Form: defvar symbol [value [doc-string [domain]]]
+ Example:
+ (defvar weight 250 "Weight of gorilla, in pounds." "emacs-gorilla")
-`vm-undisplay-buffer-hook'
+ - Special Form: defconst symbol [value [doc-string [domain]]]
+ Example:
+ (defconst limbs 4 "Number of limbs" "emacs-gorilla")
-`vm-visit-folder-hook'
+ - Function: autoload function filename &optional docstring interactive
+ type
+ This function defines FUNCTION to autoload from FILENAME Example:
+ (autoload 'explore "jungle" "Explore the jungle." nil nil "emacs-gorilla")
-`window-setup-hook'
+\1f
+File: lispref.info, Node: Documentation String Extraction, Prev: Domain Specification, Up: I18N Level 3
-`write-contents-hooks'
+Documentation String Extraction
+-------------------------------
-`write-file-data-hooks'
+ The utility `etc/make-po' scans the file `DOC' to extract
+documentation strings and creates a message file `doc.po'. This file
+may then be inserted within `emacs.po'.
-`write-file-hooks'
+ Currently, `make-po' is hard-coded to read from `DOC' and write to
+`doc.po'. In order to extract documentation strings from an add-on
+package, first run `make-docfile' on the package to produce the `DOC'
+file. Then run `make-po -p' with the `-p' argument to indicate that we
+are extracting documentation for an add-on package.
-`write-region-annotate-functions'
+ (The `-p' argument is a kludge to make up for a subtle difference
+between pre-loaded documentation and add-on documentation: For add-on
+packages, the final carriage returns in the strings produced by
+`make-docfile' must be ignored.)
-`x-lost-selection-hooks'
+\1f
+File: lispref.info, Node: I18N Level 4, Prev: I18N Level 3, Up: Internationalization
-`x-sent-selection-hooks'
+I18N Level 4
+============
-`zmacs-activate-region-hook'
+ The Asian-language support in XEmacs is called "MULE". *Note MULE::.
-`zmacs-deactivate-region-hook'
+\1f
+File: lispref.info, Node: MULE, Next: Tips, Prev: Internationalization, Up: Top
+
+MULE
+****
+
+ "MULE" is the name originally given to the version of GNU Emacs
+extended for multi-lingual (and in particular Asian-language) support.
+"MULE" is short for "MUlti-Lingual Emacs". It is an extension and
+complete rewrite of Nemacs ("Nihon Emacs" where "Nihon" is the Japanese
+word for "Japan"), which only provided support for Japanese. XEmacs
+refers to its multi-lingual support as "MULE support" since it is based
+on "MULE".
+
+* Menu:
+
+* Internationalization Terminology::
+ Definition of various internationalization terms.
+* Charsets:: Sets of related characters.
+* MULE Characters:: Working with characters in XEmacs/MULE.
+* Composite Characters:: Making new characters by overstriking other ones.
+* Coding Systems:: Ways of representing a string of chars using integers.
+* CCL:: A special language for writing fast converters.
+* Category Tables:: Subdividing charsets into groups.
-`zmacs-update-region-hook'
projects / chise / xemacs-chise.git- / blobdiff