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Add warning for str_new_static functions

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Many functions in string.c assume that capa + termlen to be readable
memory. Add comment in header to communicate this to extension authors.

See also: comment in str_fill_term()
This commit is contained in:
Alan Wu 2020-10-24 14:33:46 -04:00
parent 520b86caf1
commit 670e288d65
Notes: git 2020-10-31 08:47:40 +09:00
1 changed files with 8 additions and 3 deletions
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11
include/ruby/internal/intern/string.h
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@ -66,9 +66,14 @@ VALUE rb_usascii_str_new(const char*, long);
VALUE rb_usascii_str_new_cstr(const char*);
VALUE rb_utf8_str_new(const char*, long);
VALUE rb_utf8_str_new_cstr(const char*);
VALUE rb_str_new_static(const char *, long);
VALUE rb_usascii_str_new_static(const char *, long);
VALUE rb_utf8_str_new_static(const char *, long);
/**
* *_str_new_static functions are intended for C string literals.
* They require memory in the range [ptr, ptr+len] to always be readable.
* Note that this range covers a total of len + 1 bytes.
*/
VALUE rb_str_new_static(const char *ptr, long len);
VALUE rb_usascii_str_new_static(const char *ptr, long len);
VALUE rb_utf8_str_new_static(const char *ptr, long len);
void rb_str_free(VALUE);
void rb_str_shared_replace(VALUE, VALUE);
VALUE rb_str_buf_append(VALUE, VALUE);