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Make VM string literals immutable.

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* libguile/strings.c (scm_i_make_string, scm_i_make_wide_string): Add
  `read_only_p' parameter.  All callers updated.

* libguile/vm-i-loader.c (load_string, load_wide_string): Push read-only
  strings.

* test-suite/tests/strings.test ("literals"): New test prefix.
This commit is contained in:
Ludovic Courtès 2011-03-20 23:34:42 +01:00
parent 95c1cfb550
commit 190d4b0d93
13 changed files with 83 additions and 56 deletions
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7
libguile/strings.h
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@ -177,8 +177,11 @@ SCM_API SCM scm_makfromstrs (int argc, char **argv);
/* internal accessor functions. Arguments must be valid. */
SCM_INTERNAL SCM scm_i_make_string (size_t len, char **datap);
SCM_INTERNAL SCM scm_i_make_wide_string (size_t len, scm_t_wchar **datap);
SCM_INTERNAL SCM scm_i_make_string (size_t len, char **datap,
int read_only_p);
SCM_INTERNAL SCM scm_i_make_wide_string (size_t len, scm_t_wchar **datap,
int read_only_p);
SCM_INTERNAL SCM scm_i_set_string_read_only_x (SCM str);
SCM_INTERNAL SCM scm_i_substring (SCM str, size_t start, size_t end);
SCM_INTERNAL SCM scm_i_substring_read_only (SCM str, size_t start, size_t end);
SCM_INTERNAL SCM scm_i_substring_shared (SCM str, size_t start, size_t end);