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glob.h
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#ifndef RBIMPL_GLOB_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_GLOB_H
/**
* @file
* @author Ruby developers <ruby-core@ruby-lang.org>
* @copyright This file is a part of the programming language Ruby.
* Permission is hereby granted, to either redistribute and/or
* modify this file, provided that the conditions mentioned in the
* file COPYING are met. Consult the file for details.
* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
* implementation details. Don't take them as canon. They could
* rapidly appear then vanish. The name (path) of this header file
* is also an implementation detail. Do not expect it to persist
* at the place it is now. Developers are free to move it anywhere
* anytime at will.
* @note To ruby-core: remember that this header can be possibly
* recursively included from extension libraries written in C++.
* Do not expect for instance `__VA_ARGS__` is always available.
* We assume C99 for ruby itself but we don't assume languages of
* extension libraries. They could be written in C++98.
* @brief Declares ::rb_glob().
*/
#include "ruby/internal/attr/nonnull.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"
RBIMPL_SYMBOL_EXPORT_BEGIN()
/**
* Type of a glob callback function. Called every time glob scans a path.
*
* @param[in] path The path in question.
* @param[in] arg The argument passed to rb_glob().
* @param[in] enc Encoding of the path.
* @retval -1 Not enough memory to do the operation.
* @retval 0 Operation successful.
* @retval otherwise Opaque exception state.
* @note You can use rb_protect() to generate the return value.
*
* @internal
*
* This is a wrong design. Type of `enc` should have been `rb_encoding*`
* instead of just `void*`. But we cannot change the API any longer.
*
* Though not a part of our public API, the "opaque exception state" is in fact
* an enum ruby_tag_type. You can see the potential "otherwise" values by
* looking at vm_core.h.
*/
typedef int ruby_glob_func(const char *path, VALUE arg, void *enc);
RBIMPL_ATTR_NONNULL(())
/**
* The "glob" operator. Expands the given pattern against the actual local
* filesystem, then iterates over the expanded filenames by calling the
* callback function.
*
* @param[in] pattern A glob pattern.
* @param[in] func Identical to ruby_glob_func, except it can raise
* exceptions instead of returning opaque state.
* @param[in] arg Extra argument passed to func.
* @exception rb_eException Can propagate what `func` raises.
* @note The language accepted as the pattern is not a regular
* expression. It resembles shell's glob.
*/
void rb_glob(const char *pattern, void (*func)(const char *path, VALUE arg, void *enc), VALUE arg);
RBIMPL_ATTR_NONNULL(())
/**
* Identical to rb_glob(), except it returns opaque exception states instead of
* raising exceptions.
*
* @param[in] pattern A glob pattern.
* @param[in] flags No, you are not allowed to use this. Just pass 0.
* @param[in] func A callback function.
* @param[in] arg Extra argument passed to func.
* @return Return value of `func`.
*
* @internal
*
* This function is completely broken by design... Not only is there no sane
* way to pass flags, but there also is no sane way to know what a return value
* is meant to be.
*
* Though not a part of our public API, and @shyouhei thinks it's a failure not
* to be a public API, the flags can be `FNM_EXTGLOB`, `FNM_DOTMATCH` etc.
* Look at dir.c for the list.
*
* Though not a part of our public API, the return value is in fact an
* enum ruby_tag_type. You can see the potential values by looking at
* vm_core.h.
*/
int ruby_glob(const char *pattern, int flags, ruby_glob_func *func, VALUE arg);
RBIMPL_ATTR_NONNULL(())
/**
* Identical to ruby_glob(), @shyouhei currently suspects. Historically you
* had to call this function instead of ruby_glob() if the pattern included
* "{x,y,...}" syntax. However since commit 0f63d961169989a7f6dcf7c0487fe29da,
* ruby_glob() also supports that syntax. It seems as of writing these two
* functions provide basically the same functionality in a different
* implementation. Is this analysis right? Correct me! :FIXME:
*
* @param[in] pattern A glob pattern.
* @param[in] flags No, you are not allowed to use this. Just pass 0.
* @param[in] func A callback function.
* @param[in] arg Extra argument passed to func.
* @return Return value of `func`.
*/
int ruby_brace_glob(const char *pattern, int flags, ruby_glob_func *func, VALUE arg);
RBIMPL_SYMBOL_EXPORT_END()
#endif /* RBIMPL_GLOB_H */