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in (control_)?mbrep(), if crep is an invalid multibyte sequence, copy 

Unicode 0xFFFD (Replacement Character) into it using strncpy() instead
of assigning the former to it; this avoids segfaults when freeing crep
later, since it's supposed to be dynamically allocated


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3018 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
David Lawrence Ramsey 2005-09-14 19:17:56 +00:00
parent 1c3bfa9f2b
commit 3c4dc46fdc
2 changed files with 15 additions and 4 deletions
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5
ChangeLog
View File

@ -170,6 +170,11 @@ CVS code -
control_rep(), control_mbrep()
- Assert that the multibyte character passed in is a control
character if it's valid. (DLR)
- If crep is an invalid multibyte sequence, copy Unicode 0xFFFD
(Replacement Character) into it using strncpy() instead of
assigning the former to it. This avoids segfaults when freeing
crep later, since it's supposed to be dynamically allocated.
(DLR)
mbrep()
- New function, the equivalent of control_mbrep() for non-control
characters. (DLR)

14
src/chars.c
View File

@ -213,7 +213,10 @@ wchar_t control_wrep(wchar_t wc)
#endif
/* c is a multibyte control character. It displays as ^@, ^?, or ^[ch],
* where ch is (c + 64). We return that multibyte character. */
* where ch is (c + 64). We return that multibyte character. If crep
* is an invalid multibyte sequence, it will be replaced with Unicode
* 0xFFFD (Replacement Character), so it should be dynamically allocated
* and able to hold MB_CUR_MAX single-byte characters. */
char *control_mbrep(const char *c, char *crep, int *crep_len)
{
assert(c != NULL && crep != NULL && crep_len != NULL);
@ -224,8 +227,8 @@ char *control_mbrep(const char *c, char *crep, int *crep_len)
if (mbtowc(&wc, c, MB_CUR_MAX) < 0) {
mbtowc(NULL, NULL, 0);
crep = (char *)bad_mbchar;
*crep_len = bad_mbchar_len;
strncpy(crep, bad_mbchar, *crep_len);
} else {
*crep_len = wctomb(crep, control_wrep(wc));
@ -246,7 +249,10 @@ char *control_mbrep(const char *c, char *crep, int *crep_len)
}
/* c is a multibyte non-control character. We return that multibyte
* character. */
* character. If crep is an invalid multibyte sequence, it will be
* replaced with Unicode 0xFFFD (Replacement Character), so it should be
* dynamically allocated and able to hold MB_CUR_MAX single-byte
* characters. */
char *mbrep(const char *c, char *crep, int *crep_len)
{
assert(c != NULL && crep != NULL && crep_len != NULL);
@ -258,8 +264,8 @@ char *mbrep(const char *c, char *crep, int *crep_len)
/* Reject invalid Unicode characters. */
if (mbtowc(&wc, c, MB_CUR_MAX) < 0 || !is_valid_unicode(wc)) {
mbtowc(NULL, NULL, 0);
crep = (char *)bad_mbchar;
*crep_len = bad_mbchar_len;
strncpy(crep, bad_mbchar, *crep_len);
} else {
*crep_len = wctomb(crep, wc);