diff options
Diffstat (limited to 'readline/mbutil.c')
| -rw-r--r-- | readline/mbutil.c | 78 |
1 files changed, 57 insertions, 21 deletions
diff --git a/readline/mbutil.c b/readline/mbutil.c index 50302f0..17dde53 100644 --- a/readline/mbutil.c +++ b/readline/mbutil.c @@ -1,6 +1,6 @@ /* mbutil.c -- readline multibyte character utility functions */ -/* Copyright (C) 2001 Free Software Foundation, Inc. +/* Copyright (C) 2001-2005 Free Software Foundation, Inc. This file is part of the GNU Readline Library, a library for reading lines of text with interactive input and history editing. @@ -77,27 +77,29 @@ _rl_find_next_mbchar_internal (string, seed, count, find_non_zero) char *string; int seed, count, find_non_zero; { - size_t tmp = 0; + size_t tmp; mbstate_t ps; - int point = 0; + int point; wchar_t wc; + tmp = 0; + memset(&ps, 0, sizeof (mbstate_t)); if (seed < 0) seed = 0; if (count <= 0) return seed; - point = seed + _rl_adjust_point(string, seed, &ps); + point = seed + _rl_adjust_point (string, seed, &ps); /* if this is true, means that seed was not pointed character started byte. So correct the point and consume count */ if (seed < point) - count --; + count--; while (count > 0) { tmp = mbrtowc (&wc, string+point, strlen(string + point), &ps); - if ((size_t)(tmp) == (size_t)-1 || (size_t)(tmp) == (size_t)-2) + if (MB_INVALIDCH ((size_t)tmp)) { /* invalid bytes. asume a byte represents a character */ point++; @@ -105,9 +107,8 @@ _rl_find_next_mbchar_internal (string, seed, count, find_non_zero) /* reset states. */ memset(&ps, 0, sizeof(mbstate_t)); } - else if (tmp == (size_t)0) - /* found '\0' char */ - break; + else if (MB_NULLWCH (tmp)) + break; /* found wide '\0' */ else { /* valid bytes */ @@ -127,15 +128,16 @@ _rl_find_next_mbchar_internal (string, seed, count, find_non_zero) if (find_non_zero) { tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps); - while (wcwidth (wc) == 0) + while (tmp > 0 && wcwidth (wc) == 0) { point += tmp; tmp = mbrtowc (&wc, string + point, strlen (string + point), &ps); - if (tmp == (size_t)(0) || tmp == (size_t)(-1) || tmp == (size_t)(-2)) + if (MB_NULLWCH (tmp) || MB_INVALIDCH (tmp)) break; } } - return point; + + return point; } static int @@ -160,7 +162,7 @@ _rl_find_prev_mbchar_internal (string, seed, find_non_zero) while (point < seed) { tmp = mbrtowc (&wc, string + point, length - point, &ps); - if ((size_t)(tmp) == (size_t)-1 || (size_t)(tmp) == (size_t)-2) + if (MB_INVALIDCH ((size_t)tmp)) { /* in this case, bytes are invalid or shorted to compose multibyte char, so assume that the first byte represents @@ -169,8 +171,12 @@ _rl_find_prev_mbchar_internal (string, seed, find_non_zero) /* clear the state of the byte sequence, because in this case effect of mbstate is undefined */ memset(&ps, 0, sizeof (mbstate_t)); + + /* Since we're assuming that this byte represents a single + non-zero-width character, don't forget about it. */ + prev = point; } - else if (tmp == 0) + else if (MB_NULLWCH (tmp)) break; /* Found '\0' char. Can this happen? */ else { @@ -205,14 +211,16 @@ _rl_get_char_len (src, ps) if (tmp == (size_t)(-2)) { /* shorted to compose multibyte char */ - memset (ps, 0, sizeof(mbstate_t)); + if (ps) + memset (ps, 0, sizeof(mbstate_t)); return -2; } else if (tmp == (size_t)(-1)) { /* invalid to compose multibyte char */ /* initialize the conversion state */ - memset (ps, 0, sizeof(mbstate_t)); + if (ps) + memset (ps, 0, sizeof(mbstate_t)); return -1; } else if (tmp == (size_t)0) @@ -225,9 +233,12 @@ _rl_get_char_len (src, ps) return 1. Otherwise return 0. */ int _rl_compare_chars (buf1, pos1, ps1, buf2, pos2, ps2) - char *buf1, *buf2; - mbstate_t *ps1, *ps2; - int pos1, pos2; + char *buf1; + int pos1; + mbstate_t *ps1; + char *buf2; + int pos2; + mbstate_t *ps2; { int i, w1, w2; @@ -268,7 +279,7 @@ _rl_adjust_point(string, point, ps) while (pos < point) { tmp = mbrlen (string + pos, length - pos, ps); - if((size_t)(tmp) == (size_t)-1 || (size_t)(tmp) == (size_t)-2) + if (MB_INVALIDCH ((size_t)tmp)) { /* in this case, bytes are invalid or shorted to compose multibyte char, so assume that the first byte represents @@ -276,8 +287,11 @@ _rl_adjust_point(string, point, ps) pos++; /* clear the state of the byte sequence, because in this case effect of mbstate is undefined */ - memset (ps, 0, sizeof (mbstate_t)); + if (ps) + memset (ps, 0, sizeof (mbstate_t)); } + else if (MB_NULLWCH (tmp)) + pos++; else pos += tmp; } @@ -302,6 +316,28 @@ _rl_is_mbchar_matched (string, seed, end, mbchar, length) return 0; return 1; } + +wchar_t +_rl_char_value (buf, ind) + char *buf; + int ind; +{ + size_t tmp; + wchar_t wc; + mbstate_t ps; + int l; + + if (MB_LEN_MAX == 1 || rl_byte_oriented) + return ((wchar_t) buf[ind]); + l = strlen (buf); + if (ind >= l - 1) + return ((wchar_t) buf[ind]); + memset (&ps, 0, sizeof (mbstate_t)); + tmp = mbrtowc (&wc, buf + ind, l - ind, &ps); + if (MB_INVALIDCH (tmp) || MB_NULLWCH (tmp)) + return ((wchar_t) buf[ind]); + return wc; +} #endif /* HANDLE_MULTIBYTE */ /* Find next `count' characters started byte point of the specified seed. |