|
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| -(NOTE: you may also want to take a look at scripts/ext_skel_ng, |
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| - a PHP-only alternative for this script thats supposed |
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| - to replace it completely in the long run ...) |
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| - |
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| -WHAT IT IS |
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| - |
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| - It's a tool for automatically creating the basic framework for a PHP module |
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| - and writing C code handling arguments passed to your functions from a simple |
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| - configuration file. See an example at the end of this file. |
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| - |
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| -HOW TO USE IT |
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| - |
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| - Very simple. First, change to the ext/ directory of the PHP 4 sources. If |
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| - you just need the basic framework and will be writing all the code in your |
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| - functions yourself, you can now do |
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| - |
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| - ./ext_skel --extname=module_name |
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| - |
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| - and everything you need is placed in directory module_name. |
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| - |
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| - [ Note that GNU awk is likely required for this script to work. Debian |
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| - systems seem to default to using mawk, so you may need to change the |
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| - #! line in skeleton/create_stubs and the cat $proto | awk line in |
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| - ext_skel to use gawk explicitly. ] |
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| - |
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| - If you don't need to test the existence of any external header files, |
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| - libraries or functions in them, the module is already almost ready to be |
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| - compiled in PHP. Just remove 3 comments in your_module_name/config.m4, |
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| - change back up to PHP sources top directory, and do |
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| - |
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| - ./buildconf; ./configure --enable-module_name; make |
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| - |
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| - But if you already have planned the overall scheme of your module, what |
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| - functions it will contain, their return types and the arguments they take |
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| - (a very good idea) and don't want to bother yourself with creating function |
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| - definitions and handling arguments passed yourself, it's time to create a |
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| - function definitions file, which you will give as an argument to ext_skel |
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| - with option |
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| - |
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| - --proto=filename. |
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| - |
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| -FORMAT OF FUNCTION DEFINITIONS FILE |
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| - |
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| - All the definitions must be on one line. In it's simplest form, it's just |
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| - the function name, e.g. |
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| - |
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| - my_function |
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| - |
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| - but then you'll be left with an almost empty function body without any |
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| - argument handling. |
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| - |
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| - Arguments are given in parenthesis after the function name, and are of |
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| - the form 'argument_type argument_name'. Arguments are separated from each |
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| - other with a comma and optional space. Argument_type can be one of int, |
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| - bool, double, float, string, array, object or mixed. |
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| - |
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| - An optional argument is separated from the previous by an optional space, |
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| - then '[' and of course comma and optional space, like all the other |
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| - arguments. You should close a row of optional arguments with same amount of |
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| - ']'s as there where '['s. Currently, it does not harm if you forget to do it |
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| - or there is a wrong amount of ']'s, but this may change in the future. |
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| - |
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| - An additional short description may be added after the parameters. |
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| - If present it will be filled into the 'proto' header comments in the stubs |
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| - code and the <refpurpose> tag in the XML documentation. |
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| - |
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| - An example: |
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| - |
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| - my_function(int arg1, int arg2 [, int arg3 [, int arg4]]) this is my 1st |
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| - |
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| - Arguments arg3 and arg4 are optional. |
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| - |
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| - If possible, the function definition should also contain it's return type |
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| - in front of the definition. It's not actually used for any C code generating |
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| - purposes but PHP in-source documentation instead, and as such, very useful. |
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| - It can be any of int, double, string, bool, array, object, resource, mixed |
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| - or void. |
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| - |
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| - The file must contain nothing else but function definitions, no comments or |
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| - empty lines. |
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| - |
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| -OTHER OPTIONS |
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| - |
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| - --no-help |
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| - |
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| - By default, ext_skel creates both comments in the source code and a test |
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| - function to help first time module writers to get started and testing |
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| - configuring and compiling their module. This option turns off all such things |
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| - which may just annoy experienced PHP module coders. Especially useful with |
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| - |
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| - --stubs=file |
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| - |
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| - which will leave out also all module specific stuff and write just function |
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| - stubs with function value declarations and passed argument handling, and |
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| - function entries and definitions at the end of the file, for copying and |
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| - pasting into an already existing module. |
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| - |
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| - --assign-params |
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| - --string-lens |
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| - |
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| - By default, function proto 'void foo(string bar)' creates the following: |
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| - ... |
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| - zval **bar; |
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| - ... (zend_get_parameters_ex() called in the middle...) |
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| - convert_to_string_ex(bar); |
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| - |
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| - Specifying both of these options changes the generated code to: |
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| - ... |
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| - zval **bar_arg; |
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| - int bar_len; |
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| - char *bar = NULL; |
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| - ... (zend_get_parameters_ex() called in the middle...) |
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| - convert_to_string_ex(bar_arg); |
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| - bar = Z_STRVAL_PP(bar_arg); |
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| - bar_len = Z_STRLEN_PP(bar_arg); |
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| - |
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| - You shouldn't have to ask what happens if you leave --string-lens out. If you |
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| - have to, it's questionable whether you should be reading this document. |
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| - |
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| - --with-xml[=file] |
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| - |
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| - Creates the basics for phpdoc .xml file. |
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| - |
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| - --full-xml |
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| - |
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| - Not implemented yet. When or if there will ever be created a framework for |
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| - self-contained extensions to use phpdoc system for their documentation, this |
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| - option enables it on the created xml file. |
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| - |
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| -CURRENT LIMITATIONS, BUGS AND OTHER ODDITIES |
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| - |
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| - Only arguments of types int, bool, double, float, string and array are |
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| - handled. For other types you must write the code yourself. And for type |
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| - mixed, it wouldn't even be possible to write anything, because only you |
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| - know what to expect. |
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| - |
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| - It can't handle correctly, and probably never will, variable list of |
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| - of arguments. (void foo(int bar [, ...]) |
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| - |
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| - Don't trust the generated code too much. It tries to be useful in most of |
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| - the situations you might encounter, but automatic code generation will never |
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| - beat a programmer who knows the real situation at hand. ext_skel is generally |
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| - best suited for quickly generating a wrapper for c-library functions you |
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| - might want to have available in PHP too. |
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| - |
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| - This program doesn't have a --help option. It has --no-help instead. |
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| - |
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| -EXAMPLE |
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| - |
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| - The following _one_ line |
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| - |
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| - bool my_drawtext(resource image, string text, resource font, int x, int y [, int color]) |
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| - |
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| - will create this function definition for you (note that there are a few |
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| - question marks to be replaced by you, and you must of course add your own |
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| - value definitions too): |
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| - |
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| -/* {{{ proto bool my_drawtext(resource image, string text, resource font, int x, int y[, int color]) |
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| - */ |
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| -PHP_FUNCTION(my_drawtext) |
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| -{ |
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| - zval **image, **text, **font, **x, **y, **color; |
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| - int argc; |
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| - int image_id = -1; |
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| - int font_id = -1; |
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| - |
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| - argc = ZEND_NUM_ARGS(); |
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| - if (argc < 5 || argc > 6 || zend_get_parameters_ex(argc, &image, &text, &font, &x, &y, &color) == FAILURE) { |
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| - WRONG_PARAM_COUNT; |
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| - } |
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| - |
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| - ZEND_FETCH_RESOURCE(???, ???, image, image_id, "???", ???_rsrc_id); |
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| - ZEND_FETCH_RESOURCE(???, ???, font, font_id, "???", ???_rsrc_id); |
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| - |
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| - switch (argc) { |
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| - case 6: |
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| - convert_to_long_ex(color); |
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| - /* Fall-through. */ |
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| - case 5: |
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| - convert_to_long_ex(y); |
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| - convert_to_long_ex(x); |
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| - /* font: fetching resources already handled. */ |
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| - convert_to_string_ex(text); |
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| - /* image: fetching resources already handled. */ |
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| - break; |
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| - default: |
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| - WRONG_PARAM_COUNT; |
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| - } |
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| - |
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| - php_error(E_WARNING, "my_drawtext: not yet implemented"); |
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| -} |
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| -/* }}} */ |
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| - |
| 1 | +NOTE: ext_skel does no longer exist, it has been replaced |
| 2 | + by the PEAR package PECL_Gen |
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