Restore MRB_ARGS_* argument specs and ISO section comments to all
709 ROM method table entries. The aspec is encoded in bits 4-27 of
the flags field; MRB_MT_NOARG is now auto-derived from aspec==0.
Add MRB_MT_ENTRY_PRIVATE() macro for private methods (53 entries)
and MRB_MT_ASPEC() accessor for extracting aspec from flags.
Co-authored-by: Claude <noreply@anthropic.com>
Move conditional mrb_define_method_id() calls into ROM entry
arrays using #ifdef guards. With linear search, sizeof in
MRB_MT_ROM_TAB() adjusts automatically after preprocessing.
Cross-class ROM tables (methods a gem defines on a class it does
not own) are reverted to mrb_define_method_id(). Multiple gems
should not add ROM table layers to the same class; each layer
costs a 16-byte mrb_mt_tbl struct in RAM and deepens the lookup
chain. Use mrb_define_method_id() for cross-class methods.
Co-authored-by: Claude <noreply@anthropic.com>
Since ROM table entries are always C functions, have the
MRB_MT_ENTRY() macro set MRB_MT_FUNC automatically. This
simplifies entry definitions across all 32 source files.
Co-authored-by: Claude <noreply@anthropic.com>
Replace binary search with linear scan in mt_get(), mt_put(),
mt_del(), mt_chain_has(), and mrb_mt_foreach(). The method cache
makes repeated lookups O(1), so linear scan on cache misses is
acceptable.
This removes the sorting requirement, allowing ROM entry arrays
to be declared const. On embedded systems, const static data
resides in flash/ROM instead of RAM, saving ~8.4KB for ~700
method entries on 32-bit MCUs.
Co-authored-by: Claude <noreply@anthropic.com>
Replace the parallel-arrays (struct-of-arrays) ROM method table
layout with an array-of-structs layout where each mrb_mt_entry
bundles its function pointer and symbol key together.
New MRB_MT_ENTRY() and MRB_MT_ROM_TAB() macros simplify ROM table
definitions from a 3-part pattern (SIZE define + anonymous struct +
mrb_mt_tbl) to a 2-part pattern (entries array + mrb_mt_tbl).
Internal mt_* functions in class.c are simplified: single memmove/
memcpy operations replace paired key+value operations.
Co-authored-by: Claude <noreply@anthropic.com>
Presym is now always enabled. Remove #ifndef MRB_NO_PRESYM
guards and their #else fallback branches from all core files.
Co-authored-by: Claude <noreply@anthropic.com>
Move String's 46 method definitions from runtime
mrb_define_method_id() calls to a static ROM method table
sorted at init time. mrb_mt_init_rom() sorts the parallel
vals/keys arrays by presym ID and sets the readonly flag.
Expose mt_tbl and related types in internal.h so ROM tables
can be defined in individual source files.
When MRB_NO_PRESYM is defined, falls back to traditional
runtime method registration.
Co-authored-by: Claude <noreply@anthropic.com>
Reject MRB_INT_MAX length strings to prevent signed integer overflow
when adding 1 for the null terminator in str_init_normal_capa() and
resize_capa().
Co-authored-by: Claude <noreply@anthropic.com>
Add #undef lesser after last usage to prevent macro redefinition
warnings when files are amalgamated into a single translation unit.
Co-authored-by: Claude <noreply@anthropic.com>
Move casecmp_p from mruby-string-ext and mruby-encoding to core as
mrb_strcasecmp_p (predicate function returning mrb_bool). Add
MRB_STR_CASECMP_P macro to internal.h for comparing mrb_value strings
with literal strings.
This eliminates code duplication and avoids static function name
collision for future amalgamation support.
Co-authored-by: Claude <noreply@anthropic.com>
Extract duplicated UTF-8 codepoint-to-bytes encoding into a shared
function in src/string.c. Update all gems to use it:
- mruby-sprintf: %c specifier
- mruby-io: putc
- mruby-string-ext: Integer#chr
- mruby-pack: pack("U")
- mruby-compiler: Unicode escapes in parser
Also use existing mrb_utf8len() in io.c for character length detection.
Co-authored-by: Claude <noreply@anthropic.com>
refactored the NULL pointer guard in mrb_str_cmp() from an if-else
block to a more concise ternary operator. functionality remains the
same: avoids undefined behavior by skipping memcmp() when comparing
zero-length strings.
Co-authored-by: Claude <noreply@anthropic.com>
passing NULL pointers to memcmp() is undefined behavior per C standard,
even when size is 0. memcmp() is declared with nonnull attributes,
and ASAN can detect this violation.
in mrb_str_cmp(), when comparing two empty strings or when the minimum
length is 0, we now skip the memcmp() call and directly set retval to 0.
this avoids the undefined behavior while maintaining correct comparison
semantics.
Co-authored-by: Claude <noreply@anthropic.com>
Replace XML-style markup tags in comments with markdown equivalents:
- <code>...</code> to `...` (inline code)
- <tt>...</tt> to `...` (teletype/monospace)
- <i>...</i> to *...* (italics/emphasis)
- +...+ to `...` (parameter/variable references)
Updated 80+ files across core source, headers, mrbgems, and libraries
to use consistent markdown formatting in documentation comments.
Handled edge cases including special characters like <=> operators.
Co-authored-by: Atlassian Rovo Dev
Add descriptive comments for MRB_API functions in src/string.c
This commit adds descriptive comments to various MRB_API functions
within the src/string.c file. These comments aim to improve code
readability and maintainability by explaining the purpose,
parameters, and return values of these functions.
The old name `str_modify_keep_ascii` does not describe the function
behavior. It was named so since it was separated from the function
`mrb_str_modify_keep_ascii`.
`string[]=(idx, replace)` should return `replace`.
## Actual (wrong)
```
string.[]=(idx, replace) → string
string.[]=(idx, len, replace) → string
```
## Expected
```
string.[]=(idx, replace) → replace
string.[]=(idx, len, replace) → replace
```
## Sidenote
As of the current mruby-compiler, `(string[idx] = 'X')` creates not only "CALL_NODE" but also "ASGN_NODE" and "OP_MOVE", overriding the wrong return value.
On the other hand, `string.[]=(idx, 'X')` creates only "CALL_NODE", exposing the wrong return value.
If my new mruby-compiler2, leveraging Prism, took the place of official compiler, `(string[idx] = 'X')` and `string.[]=(idx, 'X')` would be going to generate the same VM code without "OP_MOVE".
So I paranoidly added tests.
FYI: You can find how the new mruby-compiler2's AST and VM code look like in mruby/c's issue (mruby/c had the same bug): https://github.com/mrubyc/mrubyc/pull/210
We need to include stdlib.h and malloc.h to use malloc()/free() but
they aren't included in src/string.c with WIN32_LEAN_AND_MEAN. It
generates build time warnings.
We can solve this by including stdlib.h and malloc.h explicitly.
Previous SWAR version assumes valid UTF-8 to count number of code points
in the string, but we need to handle invalid sequence as well. We now
use `search_nonascii` to skip counting single byte characters for
performance. The new version is even faster than SWAR version (probably
because `search_nonascii` uses SSE2 on Intel compatible CPU (which I use).
Yukihiro "Matz" Matsumoto