diff options
Diffstat (limited to 'libbb/lineedit.c')
| -rw-r--r-- | libbb/lineedit.c | 62 |
1 files changed, 51 insertions, 11 deletions
diff --git a/libbb/lineedit.c b/libbb/lineedit.c index dc90846f9..622f9ddfc 100644 --- a/libbb/lineedit.c +++ b/libbb/lineedit.c @@ -68,7 +68,7 @@ #undef CHAR_T #if ENABLE_UNICODE_SUPPORT -# define BB_NUL L'\0' +# define BB_NUL ((wchar_t)0) # define CHAR_T wchar_t static bool BB_isspace(CHAR_T c) { return ((unsigned)c < 256 && isspace(c)); } # if ENABLE_FEATURE_EDITING_VI @@ -92,6 +92,14 @@ static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); } #endif +# if ENABLE_UNICODE_PRESERVE_BROKEN +# define unicode_mark_inv_wchar(wc) ((wc) | 0x20000000) +# define unicode_is_inv_wchar(wc) ((wc) & 0x20000000) +# else +# define unicode_is_inv_wchar(wc) 0 +# endif + + enum { /* We use int16_t for positions, need to limit line len */ MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0 @@ -208,24 +216,58 @@ static size_t load_string(const char *src, int maxsize) ssize_t len = mbstowcs(command_ps, src, maxsize - 1); if (len < 0) len = 0; - command_ps[len] = L'\0'; + command_ps[len] = 0; return len; } -static size_t save_string(char *dst, int maxsize) +static unsigned save_string(char *dst, unsigned maxsize) { +#if !ENABLE_UNICODE_PRESERVE_BROKEN ssize_t len = wcstombs(dst, command_ps, maxsize - 1); if (len < 0) len = 0; dst[len] = '\0'; return len; +#else + unsigned dstpos = 0; + unsigned srcpos = 0; + + maxsize--; + while (dstpos < maxsize) { + wchar_t wc; + int n = srcpos; + while ((wc = command_ps[srcpos]) != 0 + && !unicode_is_inv_wchar(wc) + ) { + srcpos++; + } + command_ps[srcpos] = 0; + n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos); + if (n < 0) /* should not happen */ + break; + dstpos += n; + if (wc == 0) /* usually is */ + break; + /* We do have invalid byte here! */ + command_ps[srcpos] = wc; /* restore it */ + srcpos++; + if (dstpos == maxsize) + break; + dst[dstpos++] = (char) wc; + } + dst[dstpos] = '\0'; + return dstpos; +#endif } /* I thought just fputwc(c, stdout) would work. But no... */ static void BB_PUTCHAR(wchar_t c) { char buf[MB_CUR_MAX + 1]; mbstate_t mbst = { 0 }; - ssize_t len = wcrtomb(buf, c, &mbst); + ssize_t len; + if (unicode_is_inv_wchar(c)) + c = CONFIG_SUBST_WCHAR; + len = wcrtomb(buf, c, &mbst); if (len > 0) { buf[len] = '\0'; fputs(buf, stdout); @@ -238,7 +280,7 @@ static size_t load_string(const char *src, int maxsize) return strlen(command_ps); } # if ENABLE_FEATURE_TAB_COMPLETION -static void save_string(char *dst, int maxsize) +static void save_string(char *dst, unsigned maxsize) { safe_strncpy(dst, command_ps, maxsize); } @@ -1719,13 +1761,11 @@ static int lineedit_read_key(char *read_key_buffer) pushback: /* Invalid sequence. Save all "bad bytes" except first */ read_key_ungets(read_key_buffer, unicode_buf + 1, unicode_idx - 1); - /* - * ic = unicode_buf[0] sounds even better, but currently - * this does not work: wchar_t[] -> char[] conversion - * when lineedit finishes mangles such "raw bytes" - * (by misinterpreting them as unicode chars): - */ +# if !ENABLE_UNICODE_PRESERVE_BROKEN ic = CONFIG_SUBST_WCHAR; +# else + ic = unicode_mark_inv_wchar(unicode_buf[0]); +# endif } else { /* Valid unicode char, return its code */ ic = wc; |