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Diffstat (limited to '')
| -rw-r--r-- | src/charset.c | 2093 |
1 files changed, 2093 insertions, 0 deletions
diff --git a/src/charset.c b/src/charset.c new file mode 100644 index 0000000..5b091ec --- /dev/null +++ b/src/charset.c @@ -0,0 +1,2093 @@ +/* vi:set ts=8 sts=4 sw=4 noet: + * + * VIM - Vi IMproved by Bram Moolenaar + * + * Do ":help uganda" in Vim to read copying and usage conditions. + * Do ":help credits" in Vim to see a list of people who contributed. + * See README.txt for an overview of the Vim source code. + */ + +#include "vim.h" + +#if defined(HAVE_WCHAR_H) +# include <wchar.h> /* for towupper() and towlower() */ +#endif +static int win_nolbr_chartabsize(win_T *wp, char_u *s, colnr_T col, int *headp); + +static unsigned nr2hex(unsigned c); + +static int chartab_initialized = FALSE; + +/* b_chartab[] is an array of 32 bytes, each bit representing one of the + * characters 0-255. */ +#define SET_CHARTAB(buf, c) (buf)->b_chartab[(unsigned)(c) >> 3] |= (1 << ((c) & 0x7)) +#define RESET_CHARTAB(buf, c) (buf)->b_chartab[(unsigned)(c) >> 3] &= ~(1 << ((c) & 0x7)) +#define GET_CHARTAB(buf, c) ((buf)->b_chartab[(unsigned)(c) >> 3] & (1 << ((c) & 0x7))) + +/* table used below, see init_chartab() for an explanation */ +static char_u g_chartab[256]; + +/* + * Flags for g_chartab[]. + */ +#define CT_CELL_MASK 0x07 /* mask: nr of display cells (1, 2 or 4) */ +#define CT_PRINT_CHAR 0x10 /* flag: set for printable chars */ +#define CT_ID_CHAR 0x20 /* flag: set for ID chars */ +#define CT_FNAME_CHAR 0x40 /* flag: set for file name chars */ + +/* + * Fill g_chartab[]. Also fills curbuf->b_chartab[] with flags for keyword + * characters for current buffer. + * + * Depends on the option settings 'iskeyword', 'isident', 'isfname', + * 'isprint' and 'encoding'. + * + * The index in g_chartab[] depends on 'encoding': + * - For non-multi-byte index with the byte (same as the character). + * - For DBCS index with the first byte. + * - For UTF-8 index with the character (when first byte is up to 0x80 it is + * the same as the character, if the first byte is 0x80 and above it depends + * on further bytes). + * + * The contents of g_chartab[]: + * - The lower two bits, masked by CT_CELL_MASK, give the number of display + * cells the character occupies (1 or 2). Not valid for UTF-8 above 0x80. + * - CT_PRINT_CHAR bit is set when the character is printable (no need to + * translate the character before displaying it). Note that only DBCS + * characters can have 2 display cells and still be printable. + * - CT_FNAME_CHAR bit is set when the character can be in a file name. + * - CT_ID_CHAR bit is set when the character can be in an identifier. + * + * Return FAIL if 'iskeyword', 'isident', 'isfname' or 'isprint' option has an + * error, OK otherwise. + */ + int +init_chartab(void) +{ + return buf_init_chartab(curbuf, TRUE); +} + + int +buf_init_chartab( + buf_T *buf, + int global) /* FALSE: only set buf->b_chartab[] */ +{ + int c; + int c2; + char_u *p; + int i; + int tilde; + int do_isalpha; + + if (global) + { + /* + * Set the default size for printable characters: + * From <Space> to '~' is 1 (printable), others are 2 (not printable). + * This also inits all 'isident' and 'isfname' flags to FALSE. + * + * EBCDIC: all chars below ' ' are not printable, all others are + * printable. + */ + c = 0; + while (c < ' ') + g_chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2; +#ifdef EBCDIC + while (c < 255) +#else + while (c <= '~') +#endif + g_chartab[c++] = 1 + CT_PRINT_CHAR; +#ifdef FEAT_FKMAP + if (p_altkeymap) + { + while (c < YE) + g_chartab[c++] = 1 + CT_PRINT_CHAR; + } +#endif + while (c < 256) + { + /* UTF-8: bytes 0xa0 - 0xff are printable (latin1) */ + if (enc_utf8 && c >= 0xa0) + g_chartab[c++] = CT_PRINT_CHAR + 1; + /* euc-jp characters starting with 0x8e are single width */ + else if (enc_dbcs == DBCS_JPNU && c == 0x8e) + g_chartab[c++] = CT_PRINT_CHAR + 1; + /* other double-byte chars can be printable AND double-width */ + else if (enc_dbcs != 0 && MB_BYTE2LEN(c) == 2) + g_chartab[c++] = CT_PRINT_CHAR + 2; + else + /* the rest is unprintable by default */ + g_chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2; + } + + /* Assume that every multi-byte char is a filename character. */ + for (c = 1; c < 256; ++c) + if ((enc_dbcs != 0 && MB_BYTE2LEN(c) > 1) + || (enc_dbcs == DBCS_JPNU && c == 0x8e) + || (enc_utf8 && c >= 0xa0)) + g_chartab[c] |= CT_FNAME_CHAR; + } + + /* + * Init word char flags all to FALSE + */ + vim_memset(buf->b_chartab, 0, (size_t)32); + if (enc_dbcs != 0) + for (c = 0; c < 256; ++c) + { + /* double-byte characters are probably word characters */ + if (MB_BYTE2LEN(c) == 2) + SET_CHARTAB(buf, c); + } + +#ifdef FEAT_LISP + /* + * In lisp mode the '-' character is included in keywords. + */ + if (buf->b_p_lisp) + SET_CHARTAB(buf, '-'); +#endif + + /* Walk through the 'isident', 'iskeyword', 'isfname' and 'isprint' + * options Each option is a list of characters, character numbers or + * ranges, separated by commas, e.g.: "200-210,x,#-178,-" + */ + for (i = global ? 0 : 3; i <= 3; ++i) + { + if (i == 0) + p = p_isi; /* first round: 'isident' */ + else if (i == 1) + p = p_isp; /* second round: 'isprint' */ + else if (i == 2) + p = p_isf; /* third round: 'isfname' */ + else /* i == 3 */ + p = buf->b_p_isk; /* fourth round: 'iskeyword' */ + + while (*p) + { + tilde = FALSE; + do_isalpha = FALSE; + if (*p == '^' && p[1] != NUL) + { + tilde = TRUE; + ++p; + } + if (VIM_ISDIGIT(*p)) + c = getdigits(&p); + else + if (has_mbyte) + c = mb_ptr2char_adv(&p); + else + c = *p++; + c2 = -1; + if (*p == '-' && p[1] != NUL) + { + ++p; + if (VIM_ISDIGIT(*p)) + c2 = getdigits(&p); + else + if (has_mbyte) + c2 = mb_ptr2char_adv(&p); + else + c2 = *p++; + } + if (c <= 0 || c >= 256 || (c2 < c && c2 != -1) || c2 >= 256 + || !(*p == NUL || *p == ',')) + return FAIL; + + if (c2 == -1) /* not a range */ + { + /* + * A single '@' (not "@-@"): + * Decide on letters being ID/printable/keyword chars with + * standard function isalpha(). This takes care of locale for + * single-byte characters). + */ + if (c == '@') + { + do_isalpha = TRUE; + c = 1; + c2 = 255; + } + else + c2 = c; + } + while (c <= c2) + { + /* Use the MB_ functions here, because isalpha() doesn't + * work properly when 'encoding' is "latin1" and the locale is + * "C". */ + if (!do_isalpha || MB_ISLOWER(c) || MB_ISUPPER(c) +#ifdef FEAT_FKMAP + || (p_altkeymap && (F_isalpha(c) || F_isdigit(c))) +#endif + ) + { + if (i == 0) /* (re)set ID flag */ + { + if (tilde) + g_chartab[c] &= ~CT_ID_CHAR; + else + g_chartab[c] |= CT_ID_CHAR; + } + else if (i == 1) /* (re)set printable */ + { + if ((c < ' ' +#ifndef EBCDIC + || c > '~' +#endif +#ifdef FEAT_FKMAP + || (p_altkeymap + && (F_isalpha(c) || F_isdigit(c))) +#endif + // For double-byte we keep the cell width, so + // that we can detect it from the first byte. + ) && !(enc_dbcs && MB_BYTE2LEN(c) == 2)) + { + if (tilde) + { + g_chartab[c] = (g_chartab[c] & ~CT_CELL_MASK) + + ((dy_flags & DY_UHEX) ? 4 : 2); + g_chartab[c] &= ~CT_PRINT_CHAR; + } + else + { + g_chartab[c] = (g_chartab[c] & ~CT_CELL_MASK) + 1; + g_chartab[c] |= CT_PRINT_CHAR; + } + } + } + else if (i == 2) /* (re)set fname flag */ + { + if (tilde) + g_chartab[c] &= ~CT_FNAME_CHAR; + else + g_chartab[c] |= CT_FNAME_CHAR; + } + else /* i == 3 */ /* (re)set keyword flag */ + { + if (tilde) + RESET_CHARTAB(buf, c); + else + SET_CHARTAB(buf, c); + } + } + ++c; + } + + c = *p; + p = skip_to_option_part(p); + if (c == ',' && *p == NUL) + /* Trailing comma is not allowed. */ + return FAIL; + } + } + chartab_initialized = TRUE; + return OK; +} + +/* + * Translate any special characters in buf[bufsize] in-place. + * The result is a string with only printable characters, but if there is not + * enough room, not all characters will be translated. + */ + void +trans_characters( + char_u *buf, + int bufsize) +{ + int len; /* length of string needing translation */ + int room; /* room in buffer after string */ + char_u *trs; /* translated character */ + int trs_len; /* length of trs[] */ + + len = (int)STRLEN(buf); + room = bufsize - len; + while (*buf != 0) + { + /* Assume a multi-byte character doesn't need translation. */ + if (has_mbyte && (trs_len = (*mb_ptr2len)(buf)) > 1) + len -= trs_len; + else + { + trs = transchar_byte(*buf); + trs_len = (int)STRLEN(trs); + if (trs_len > 1) + { + room -= trs_len - 1; + if (room <= 0) + return; + mch_memmove(buf + trs_len, buf + 1, (size_t)len); + } + mch_memmove(buf, trs, (size_t)trs_len); + --len; + } + buf += trs_len; + } +} + +#if defined(FEAT_EVAL) || defined(FEAT_TITLE) || defined(FEAT_INS_EXPAND) \ + || defined(PROTO) +/* + * Translate a string into allocated memory, replacing special chars with + * printable chars. Returns NULL when out of memory. + */ + char_u * +transstr(char_u *s) +{ + char_u *res; + char_u *p; + int l, len, c; + char_u hexbuf[11]; + + if (has_mbyte) + { + /* Compute the length of the result, taking account of unprintable + * multi-byte characters. */ + len = 0; + p = s; + while (*p != NUL) + { + if ((l = (*mb_ptr2len)(p)) > 1) + { + c = (*mb_ptr2char)(p); + p += l; + if (vim_isprintc(c)) + len += l; + else + { + transchar_hex(hexbuf, c); + len += (int)STRLEN(hexbuf); + } + } + else + { + l = byte2cells(*p++); + if (l > 0) + len += l; + else + len += 4; /* illegal byte sequence */ + } + } + res = alloc((unsigned)(len + 1)); + } + else + res = alloc((unsigned)(vim_strsize(s) + 1)); + if (res != NULL) + { + *res = NUL; + p = s; + while (*p != NUL) + { + if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1) + { + c = (*mb_ptr2char)(p); + if (vim_isprintc(c)) + STRNCAT(res, p, l); /* append printable multi-byte char */ + else + transchar_hex(res + STRLEN(res), c); + p += l; + } + else + STRCAT(res, transchar_byte(*p++)); + } + } + return res; +} +#endif + +#if defined(FEAT_SYN_HL) || defined(FEAT_INS_EXPAND) || defined(PROTO) +/* + * Convert the string "str[orglen]" to do ignore-case comparing. Uses the + * current locale. + * When "buf" is NULL returns an allocated string (NULL for out-of-memory). + * Otherwise puts the result in "buf[buflen]". + */ + char_u * +str_foldcase( + char_u *str, + int orglen, + char_u *buf, + int buflen) +{ + garray_T ga; + int i; + int len = orglen; + +#define GA_CHAR(i) ((char_u *)ga.ga_data)[i] +#define GA_PTR(i) ((char_u *)ga.ga_data + i) +#define STR_CHAR(i) (buf == NULL ? GA_CHAR(i) : buf[i]) +#define STR_PTR(i) (buf == NULL ? GA_PTR(i) : buf + i) + + /* Copy "str" into "buf" or allocated memory, unmodified. */ + if (buf == NULL) + { + ga_init2(&ga, 1, 10); + if (ga_grow(&ga, len + 1) == FAIL) + return NULL; + mch_memmove(ga.ga_data, str, (size_t)len); + ga.ga_len = len; + } + else + { + if (len >= buflen) /* Ugly! */ + len = buflen - 1; + mch_memmove(buf, str, (size_t)len); + } + if (buf == NULL) + GA_CHAR(len) = NUL; + else + buf[len] = NUL; + + /* Make each character lower case. */ + i = 0; + while (STR_CHAR(i) != NUL) + { + if (enc_utf8 || (has_mbyte && MB_BYTE2LEN(STR_CHAR(i)) > 1)) + { + if (enc_utf8) + { + int c = utf_ptr2char(STR_PTR(i)); + int olen = utf_ptr2len(STR_PTR(i)); + int lc = utf_tolower(c); + + /* Only replace the character when it is not an invalid + * sequence (ASCII character or more than one byte) and + * utf_tolower() doesn't return the original character. */ + if ((c < 0x80 || olen > 1) && c != lc) + { + int nlen = utf_char2len(lc); + + /* If the byte length changes need to shift the following + * characters forward or backward. */ + if (olen != nlen) + { + if (nlen > olen) + { + if (buf == NULL + ? ga_grow(&ga, nlen - olen + 1) == FAIL + : len + nlen - olen >= buflen) + { + /* out of memory, keep old char */ + lc = c; + nlen = olen; + } + } + if (olen != nlen) + { + if (buf == NULL) + { + STRMOVE(GA_PTR(i) + nlen, GA_PTR(i) + olen); + ga.ga_len += nlen - olen; + } + else + { + STRMOVE(buf + i + nlen, buf + i + olen); + len += nlen - olen; + } + } + } + (void)utf_char2bytes(lc, STR_PTR(i)); + } + } + /* skip to next multi-byte char */ + i += (*mb_ptr2len)(STR_PTR(i)); + } + else + { + if (buf == NULL) + GA_CHAR(i) = TOLOWER_LOC(GA_CHAR(i)); + else + buf[i] = TOLOWER_LOC(buf[i]); + ++i; + } + } + + if (buf == NULL) + return (char_u *)ga.ga_data; + return buf; +} +#endif + +/* + * Catch 22: g_chartab[] can't be initialized before the options are + * initialized, and initializing options may cause transchar() to be called! + * When chartab_initialized == FALSE don't use g_chartab[]. + * Does NOT work for multi-byte characters, c must be <= 255. + * Also doesn't work for the first byte of a multi-byte, "c" must be a + * character! + */ +static char_u transchar_buf[7]; + + char_u * +transchar(int c) +{ + int i; + + i = 0; + if (IS_SPECIAL(c)) /* special key code, display as ~@ char */ + { + transchar_buf[0] = '~'; + transchar_buf[1] = '@'; + i = 2; + c = K_SECOND(c); + } + + if ((!chartab_initialized && ( +#ifdef EBCDIC + (c >= 64 && c < 255) +#else + (c >= ' ' && c <= '~') +#endif +#ifdef FEAT_FKMAP + || (p_altkeymap && F_ischar(c)) +#endif + )) || (c < 256 && vim_isprintc_strict(c))) + { + /* printable character */ + transchar_buf[i] = c; + transchar_buf[i + 1] = NUL; + } + else + transchar_nonprint(transchar_buf + i, c); + return transchar_buf; +} + +/* + * Like transchar(), but called with a byte instead of a character. Checks + * for an illegal UTF-8 byte. + */ + char_u * +transchar_byte(int c) +{ + if (enc_utf8 && c >= 0x80) + { + transchar_nonprint(transchar_buf, c); + return transchar_buf; + } + return transchar(c); +} + +/* + * Convert non-printable character to two or more printable characters in + * "buf[]". "buf" needs to be able to hold five bytes. + * Does NOT work for multi-byte characters, c must be <= 255. + */ + void +transchar_nonprint(char_u *buf, int c) +{ + if (c == NL) + c = NUL; /* we use newline in place of a NUL */ + else if (c == CAR && get_fileformat(curbuf) == EOL_MAC) + c = NL; /* we use CR in place of NL in this case */ + + if (dy_flags & DY_UHEX) /* 'display' has "uhex" */ + transchar_hex(buf, c); + +#ifdef EBCDIC + /* For EBCDIC only the characters 0-63 and 255 are not printable */ + else if (CtrlChar(c) != 0 || c == DEL) +#else + else if (c <= 0x7f) /* 0x00 - 0x1f and 0x7f */ +#endif + { + buf[0] = '^'; +#ifdef EBCDIC + if (c == DEL) + buf[1] = '?'; /* DEL displayed as ^? */ + else + buf[1] = CtrlChar(c); +#else + buf[1] = c ^ 0x40; /* DEL displayed as ^? */ +#endif + + buf[2] = NUL; + } + else if (enc_utf8 && c >= 0x80) + { + transchar_hex(buf, c); + } +#ifndef EBCDIC + else if (c >= ' ' + 0x80 && c <= '~' + 0x80) /* 0xa0 - 0xfe */ + { + buf[0] = '|'; + buf[1] = c - 0x80; + buf[2] = NUL; + } +#else + else if (c < 64) + { + buf[0] = '~'; + buf[1] = MetaChar(c); + buf[2] = NUL; + } +#endif + else /* 0x80 - 0x9f and 0xff */ + { + /* + * TODO: EBCDIC I don't know what to do with this chars, so I display + * them as '~?' for now + */ + buf[0] = '~'; +#ifdef EBCDIC + buf[1] = '?'; /* 0xff displayed as ~? */ +#else + buf[1] = (c - 0x80) ^ 0x40; /* 0xff displayed as ~? */ +#endif + buf[2] = NUL; + } +} + + void +transchar_hex(char_u *buf, int c) +{ + int i = 0; + + buf[0] = '<'; + if (c > 255) + { + buf[++i] = nr2hex((unsigned)c >> 12); + buf[++i] = nr2hex((unsigned)c >> 8); + } + buf[++i] = nr2hex((unsigned)c >> 4); + buf[++i] = nr2hex((unsigned)c); + buf[++i] = '>'; + buf[++i] = NUL; +} + +/* + * Convert the lower 4 bits of byte "c" to its hex character. + * Lower case letters are used to avoid the confusion of <F1> being 0xf1 or + * function key 1. + */ + static unsigned +nr2hex(unsigned c) +{ + if ((c & 0xf) <= 9) + return (c & 0xf) + '0'; + return (c & 0xf) - 10 + 'a'; +} + +/* + * Return number of display cells occupied by byte "b". + * Caller must make sure 0 <= b <= 255. + * For multi-byte mode "b" must be the first byte of a character. + * A TAB is counted as two cells: "^I". + * For UTF-8 mode this will return 0 for bytes >= 0x80, because the number of + * cells depends on further bytes. + */ + int +byte2cells(int b) +{ + if (enc_utf8 && b >= 0x80) + return 0; + return (g_chartab[b] & CT_CELL_MASK); +} + +/* + * Return number of display cells occupied by character "c". + * "c" can be a special key (negative number) in which case 3 or 4 is returned. + * A TAB is counted as two cells: "^I" or four: "<09>". + */ + int +char2cells(int c) +{ + if (IS_SPECIAL(c)) + return char2cells(K_SECOND(c)) + 2; + if (c >= 0x80) + { + /* UTF-8: above 0x80 need to check the value */ + if (enc_utf8) + return utf_char2cells(c); + /* DBCS: double-byte means double-width, except for euc-jp with first + * byte 0x8e */ + if (enc_dbcs != 0 && c >= 0x100) + { + if (enc_dbcs == DBCS_JPNU && ((unsigned)c >> 8) == 0x8e) + return 1; + return 2; + } + } + return (g_chartab[c & 0xff] & CT_CELL_MASK); +} + +/* + * Return number of display cells occupied by character at "*p". + * A TAB is counted as two cells: "^I" or four: "<09>". + */ + int +ptr2cells(char_u *p) +{ + /* For UTF-8 we need to look at more bytes if the first byte is >= 0x80. */ + if (enc_utf8 && *p >= 0x80) + return utf_ptr2cells(p); + /* For DBCS we can tell the cell count from the first byte. */ + return (g_chartab[*p] & CT_CELL_MASK); +} + +/* + * Return the number of character cells string "s" will take on the screen, + * counting TABs as two characters: "^I". + */ + int +vim_strsize(char_u *s) +{ + return vim_strnsize(s, (int)MAXCOL); +} + +/* + * Return the number of character cells string "s[len]" will take on the + * screen, counting TABs as two characters: "^I". + */ + int +vim_strnsize(char_u *s, int len) +{ + int size = 0; + + while (*s != NUL && --len >= 0) + if (has_mbyte) + { + int l = (*mb_ptr2len)(s); + + size += ptr2cells(s); + s += l; + len -= l - 1; + } + else + size += byte2cells(*s++); + + return size; +} + +/* + * Return the number of characters 'c' will take on the screen, taking + * into account the size of a tab. + * Use a define to make it fast, this is used very often!!! + * Also see getvcol() below. + */ + +#ifdef FEAT_VARTABS +# define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \ + if (*(p) == TAB && (!(wp)->w_p_list || lcs_tab1)) \ + { \ + return tabstop_padding(col, (buf)->b_p_ts, (buf)->b_p_vts_array); \ + } \ + else \ + return ptr2cells(p); +#else +# define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \ + if (*(p) == TAB && (!(wp)->w_p_list || lcs_tab1)) \ + { \ + int ts; \ + ts = (buf)->b_p_ts; \ + return (int)(ts - (col % ts)); \ + } \ + else \ + return ptr2cells(p); +#endif + + int +chartabsize(char_u *p, colnr_T col) +{ + RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, p, col) +} + +#ifdef FEAT_LINEBREAK + static int +win_chartabsize(win_T *wp, char_u *p, colnr_T col) +{ + RET_WIN_BUF_CHARTABSIZE(wp, wp->w_buffer, p, col) +} +#endif + +/* + * Return the number of characters the string 's' will take on the screen, + * taking into account the size of a tab. + */ + int +linetabsize(char_u *s) +{ + return linetabsize_col(0, s); +} + +/* + * Like linetabsize(), but starting at column "startcol". + */ + int +linetabsize_col(int startcol, char_u *s) +{ + colnr_T col = startcol; + char_u *line = s; /* pointer to start of line, for breakindent */ + + while (*s != NUL) + col += lbr_chartabsize_adv(line, &s, col); + return (int)col; +} + +/* + * Like linetabsize(), but for a given window instead of the current one. + */ + int +win_linetabsize(win_T *wp, char_u *line, colnr_T len) +{ + colnr_T col = 0; + char_u *s; + + for (s = line; *s != NUL && (len == MAXCOL || s < line + len); + MB_PTR_ADV(s)) + col += win_lbr_chartabsize(wp, line, s, col, NULL); + return (int)col; +} + +/* + * Return TRUE if 'c' is a normal identifier character: + * Letters and characters from the 'isident' option. + */ + int +vim_isIDc(int c) +{ + return (c > 0 && c < 0x100 && (g_chartab[c] & CT_ID_CHAR)); +} + +/* + * return TRUE if 'c' is a keyword character: Letters and characters from + * 'iskeyword' option for the current buffer. + * For multi-byte characters mb_get_class() is used (builtin rules). + */ + int +vim_iswordc(int c) +{ + return vim_iswordc_buf(c, curbuf); +} + + int +vim_iswordc_buf(int c, buf_T *buf) +{ + if (c >= 0x100) + { + if (enc_dbcs != 0) + return dbcs_class((unsigned)c >> 8, (unsigned)(c & 0xff)) >= 2; + if (enc_utf8) + return utf_class_buf(c, buf) >= 2; + return FALSE; + } + return (c > 0 && GET_CHARTAB(buf, c) != 0); +} + +/* + * Just like vim_iswordc() but uses a pointer to the (multi-byte) character. + */ + int +vim_iswordp(char_u *p) +{ + return vim_iswordp_buf(p, curbuf); +} + + int +vim_iswordp_buf(char_u *p, buf_T *buf) +{ + int c = *p; + + if (has_mbyte && MB_BYTE2LEN(c) > 1) + c = (*mb_ptr2char)(p); + return vim_iswordc_buf(c, buf); +} + +/* + * return TRUE if 'c' is a valid file-name character + * Assume characters above 0x100 are valid (multi-byte). + */ + int +vim_isfilec(int c) +{ + return (c >= 0x100 || (c > 0 && (g_chartab[c] & CT_FNAME_CHAR))); +} + +/* + * return TRUE if 'c' is a valid file-name character or a wildcard character + * Assume characters above 0x100 are valid (multi-byte). + * Explicitly interpret ']' as a wildcard character as mch_has_wildcard("]") + * returns false. + */ + int +vim_isfilec_or_wc(int c) +{ + char_u buf[2]; + + buf[0] = (char_u)c; + buf[1] = NUL; + return vim_isfilec(c) || c == ']' || mch_has_wildcard(buf); +} + +/* + * Return TRUE if 'c' is a printable character. + * Assume characters above 0x100 are printable (multi-byte), except for + * Unicode. + */ + int +vim_isprintc(int c) +{ + if (enc_utf8 && c >= 0x100) + return utf_printable(c); + return (c >= 0x100 || (c > 0 && (g_chartab[c] & CT_PRINT_CHAR))); +} + +/* + * Strict version of vim_isprintc(c), don't return TRUE if "c" is the head + * byte of a double-byte character. + */ + int +vim_isprintc_strict(int c) +{ + if (enc_dbcs != 0 && c < 0x100 && MB_BYTE2LEN(c) > 1) + return FALSE; + if (enc_utf8 && c >= 0x100) + return utf_printable(c); + return (c >= 0x100 || (c > 0 && (g_chartab[c] & CT_PRINT_CHAR))); +} + +/* + * like chartabsize(), but also check for line breaks on the screen + */ + int +lbr_chartabsize( + char_u *line UNUSED, /* start of the line */ + unsigned char *s, + colnr_T col) +{ +#ifdef FEAT_LINEBREAK + if (!curwin->w_p_lbr && *p_sbr == NUL && !curwin->w_p_bri) + { +#endif + if (curwin->w_p_wrap) + return win_nolbr_chartabsize(curwin, s, col, NULL); + RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, s, col) +#ifdef FEAT_LINEBREAK + } + return win_lbr_chartabsize(curwin, line == NULL ? s : line, s, col, NULL); +#endif +} + +/* + * Call lbr_chartabsize() and advance the pointer. + */ + int +lbr_chartabsize_adv( + char_u *line, /* start of the line */ + char_u **s, + colnr_T col) +{ + int retval; + + retval = lbr_chartabsize(line, *s, col); + MB_PTR_ADV(*s); + return retval; +} + +/* + * This function is used very often, keep it fast!!!! + * + * If "headp" not NULL, set *headp to the size of what we for 'showbreak' + * string at start of line. Warning: *headp is only set if it's a non-zero + * value, init to 0 before calling. + */ + int +win_lbr_chartabsize( + win_T *wp, + char_u *line UNUSED, /* start of the line */ + char_u *s, + colnr_T col, + int *headp UNUSED) +{ +#ifdef FEAT_LINEBREAK + int c; + int size; + colnr_T col2; + colnr_T col_adj = 0; /* col + screen size of tab */ + colnr_T colmax; + int added; + int mb_added = 0; + int numberextra; + char_u *ps; + int tab_corr = (*s == TAB); + int n; + + /* + * No 'linebreak', 'showbreak' and 'breakindent': return quickly. + */ + if (!wp->w_p_lbr && !wp->w_p_bri && *p_sbr == NUL) +#endif + { + if (wp->w_p_wrap) + return win_nolbr_chartabsize(wp, s, col, headp); + RET_WIN_BUF_CHARTABSIZE(wp, wp->w_buffer, s, col) + } + +#ifdef FEAT_LINEBREAK + /* + * First get normal size, without 'linebreak' + */ + size = win_chartabsize(wp, s, col); + c = *s; + if (tab_corr) + col_adj = size - 1; + + /* + * If 'linebreak' set check at a blank before a non-blank if the line + * needs a break here + */ + if (wp->w_p_lbr + && VIM_ISBREAK(c) + && !VIM_ISBREAK((int)s[1]) + && wp->w_p_wrap + && wp->w_width != 0) + { + /* + * Count all characters from first non-blank after a blank up to next + * non-blank after a blank. + */ + numberextra = win_col_off(wp); + col2 = col; + colmax = (colnr_T)(wp->w_width - numberextra - col_adj); + if (col >= colmax) + { + colmax += col_adj; + n = colmax + win_col_off2(wp); + if (n > 0) + colmax += (((col - colmax) / n) + 1) * n - col_adj; + } + + for (;;) + { + ps = s; + MB_PTR_ADV(s); + c = *s; + if (!(c != NUL + && (VIM_ISBREAK(c) + || (!VIM_ISBREAK(c) + && (col2 == col || !VIM_ISBREAK((int)*ps)))))) + break; + + col2 += win_chartabsize(wp, s, col2); + if (col2 >= colmax) /* doesn't fit */ + { + size = colmax - col + col_adj; + tab_corr = FALSE; + break; + } + } + } + else if (has_mbyte && size == 2 && MB_BYTE2LEN(*s) > 1 + && wp->w_p_wrap && in_win_border(wp, col)) + { + ++size; /* Count the ">" in the last column. */ + mb_added = 1; + } + + /* + * May have to add something for 'breakindent' and/or 'showbreak' + * string at start of line. + * Set *headp to the size of what we add. + */ + added = 0; + if ((*p_sbr != NUL || wp->w_p_bri) && wp->w_p_wrap && col != 0) + { + colnr_T sbrlen = 0; + int numberwidth = win_col_off(wp); + + numberextra = numberwidth; + col += numberextra + mb_added; + if (col >= (colnr_T)wp->w_width) + { + col -= wp->w_width; + numberextra = wp->w_width - (numberextra - win_col_off2(wp)); + if (col >= numberextra && numberextra > 0) + col %= numberextra; + if (*p_sbr != NUL) + { + sbrlen = (colnr_T)MB_CHARLEN(p_sbr); + if (col >= sbrlen) + col -= sbrlen; + } + if (col >= numberextra && numberextra > 0) + col = col % numberextra; + else if (col > 0 && numberextra > 0) + col += numberwidth - win_col_off2(wp); + + numberwidth -= win_col_off2(wp); + } + if (col == 0 || col + size + sbrlen > (colnr_T)wp->w_width) + { + added = 0; + if (*p_sbr != NUL) + { + if (size + sbrlen + numberwidth > (colnr_T)wp->w_width) + { + /* calculate effective window width */ + int width = (colnr_T)wp->w_width - sbrlen - numberwidth; + int prev_width = col ? ((colnr_T)wp->w_width - (sbrlen + col)) : 0; + if (width == 0) + width = (colnr_T)wp->w_width; + added += ((size - prev_width) / width) * vim_strsize(p_sbr); + if ((size - prev_width) % width) + /* wrapped, add another length of 'sbr' */ + added += vim_strsize(p_sbr); + } + else + added += vim_strsize(p_sbr); + } + if (wp->w_p_bri) + added += get_breakindent_win(wp, line); + + size += added; + if (col != 0) + added = 0; + } + } + if (headp != NULL) + *headp = added + mb_added; + return size; +#endif +} + +/* + * Like win_lbr_chartabsize(), except that we know 'linebreak' is off and + * 'wrap' is on. This means we need to check for a double-byte character that + * doesn't fit at the end of the screen line. + */ + static int +win_nolbr_chartabsize( + win_T *wp, + char_u *s, + colnr_T col, + int *headp) +{ + int n; + + if (*s == TAB && (!wp->w_p_list || lcs_tab1)) + { +# ifdef FEAT_VARTABS + return tabstop_padding(col, wp->w_buffer->b_p_ts, + wp->w_buffer->b_p_vts_array); +# else + n = wp->w_buffer->b_p_ts; + return (int)(n - (col % n)); +# endif + } + n = ptr2cells(s); + /* Add one cell for a double-width character in the last column of the + * window, displayed with a ">". */ + if (n == 2 && MB_BYTE2LEN(*s) > 1 && in_win_border(wp, col)) + { + if (headp != NULL) + *headp = 1; + return 3; + } + return n; +} + +/* + * Return TRUE if virtual column "vcol" is in the rightmost column of window + * "wp". + */ + int +in_win_border(win_T *wp, colnr_T vcol) +{ + int width1; /* width of first line (after line number) */ + int width2; /* width of further lines */ + + if (wp->w_width == 0) /* there is no border */ + return FALSE; + width1 = wp->w_width - win_col_off(wp); + if ((int)vcol < width1 - 1) + return FALSE; + if ((int)vcol == width1 - 1) + return TRUE; + width2 = width1 + win_col_off2(wp); + if (width2 <= 0) + return FALSE; + return ((vcol - width1) % width2 == width2 - 1); +} + +/* + * Get virtual column number of pos. + * start: on the first position of this character (TAB, ctrl) + * cursor: where the cursor is on this character (first char, except for TAB) + * end: on the last position of this character (TAB, ctrl) + * + * This is used very often, keep it fast! + */ + void +getvcol( + win_T *wp, + pos_T *pos, + colnr_T *start, + colnr_T *cursor, + colnr_T *end) +{ + colnr_T vcol; + char_u *ptr; /* points to current char */ + char_u *posptr; /* points to char at pos->col */ + char_u *line; /* start of the line */ + int incr; + int head; +#ifdef FEAT_VARTABS + int *vts = wp->w_buffer->b_p_vts_array; +#endif + int ts = wp->w_buffer->b_p_ts; + int c; + + vcol = 0; + line = ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE); + if (pos->col == MAXCOL) + posptr = NULL; /* continue until the NUL */ + else + { + /* Special check for an empty line, which can happen on exit, when + * ml_get_buf() always returns an empty string. */ + if (*ptr == NUL) + pos->col = 0; + posptr = ptr + pos->col; + if (has_mbyte) + /* always start on the first byte */ + posptr -= (*mb_head_off)(line, posptr); + } + + /* + * This function is used very often, do some speed optimizations. + * When 'list', 'linebreak', 'showbreak' and 'breakindent' are not set + * use a simple loop. + * Also use this when 'list' is set but tabs take their normal size. + */ + if ((!wp->w_p_list || lcs_tab1 != NUL) +#ifdef FEAT_LINEBREAK + && !wp->w_p_lbr && *p_sbr == NUL && !wp->w_p_bri +#endif + ) + { + for (;;) + { + head = 0; + c = *ptr; + /* make sure we don't go past the end of the line */ + if (c == NUL) + { + incr = 1; /* NUL at end of line only takes one column */ + break; + } + /* A tab gets expanded, depending on the current column */ + if (c == TAB) +#ifdef FEAT_VARTABS + incr = tabstop_padding(vcol, ts, vts); +#else + incr = ts - (vcol % ts); +#endif + else + { + if (has_mbyte) + { + /* For utf-8, if the byte is >= 0x80, need to look at + * further bytes to find the cell width. */ + if (enc_utf8 && c >= 0x80) + incr = utf_ptr2cells(ptr); + else + incr = g_chartab[c] & CT_CELL_MASK; + + /* If a double-cell char doesn't fit at the end of a line + * it wraps to the next line, it's like this char is three + * cells wide. */ + if (incr == 2 && wp->w_p_wrap && MB_BYTE2LEN(*ptr) > 1 + && in_win_border(wp, vcol)) + { + ++incr; + head = 1; + } + } + else + incr = g_chartab[c] & CT_CELL_MASK; + } + + if (posptr != NULL && ptr >= posptr) /* character at pos->col */ + break; + + vcol += incr; + MB_PTR_ADV(ptr); + } + } + else + { + for (;;) + { + /* A tab gets expanded, depending on the current column */ + head = 0; + incr = win_lbr_chartabsize(wp, line, ptr, vcol, &head); + /* make sure we don't go past the end of the line */ + if (*ptr == NUL) + { + incr = 1; /* NUL at end of line only takes one column */ + break; + } + + if (posptr != NULL && ptr >= posptr) /* character at pos->col */ + break; + + vcol += incr; + MB_PTR_ADV(ptr); + } + } + if (start != NULL) + *start = vcol + head; + if (end != NULL) + *end = vcol + incr - 1; + if (cursor != NULL) + { + if (*ptr == TAB + && (State & NORMAL) + && !wp->w_p_list + && !virtual_active() + && !(VIsual_active + && (*p_sel == 'e' || LTOREQ_POS(*pos, VIsual))) + ) + *cursor = vcol + incr - 1; /* cursor at end */ + else + *cursor = vcol + head; /* cursor at start */ + } +} + +/* + * Get virtual cursor column in the current window, pretending 'list' is off. + */ + colnr_T +getvcol_nolist(pos_T *posp) +{ + int list_save = curwin->w_p_list; + colnr_T vcol; + + curwin->w_p_list = FALSE; + if (posp->coladd) + getvvcol(curwin, posp, NULL, &vcol, NULL); + else + getvcol(curwin, posp, NULL, &vcol, NULL); + curwin->w_p_list = list_save; + return vcol; +} + +/* + * Get virtual column in virtual mode. + */ + void +getvvcol( + win_T *wp, + pos_T *pos, + colnr_T *start, + colnr_T *cursor, + colnr_T *end) +{ + colnr_T col; + colnr_T coladd; + colnr_T endadd; + char_u *ptr; + + if (virtual_active()) + { + /* For virtual mode, only want one value */ + getvcol(wp, pos, &col, NULL, NULL); + + coladd = pos->coladd; + endadd = 0; + /* Cannot put the cursor on part of a wide character. */ + ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE); + if (pos->col < (colnr_T)STRLEN(ptr)) + { + int c = (*mb_ptr2char)(ptr + pos->col); + + if (c != TAB && vim_isprintc(c)) + { + endadd = (colnr_T)(char2cells(c) - 1); + if (coladd > endadd) /* past end of line */ + endadd = 0; + else + coladd = 0; + } + } + col += coladd; + if (start != NULL) + *start = col; + if (cursor != NULL) + *cursor = col; + if (end != NULL) + *end = col + endadd; + } + else + getvcol(wp, pos, start, cursor, end); +} + +/* + * Get the leftmost and rightmost virtual column of pos1 and pos2. + * Used for Visual block mode. + */ + void +getvcols( + win_T *wp, + pos_T *pos1, + pos_T *pos2, + colnr_T *left, + colnr_T *right) +{ + colnr_T from1, from2, to1, to2; + + if (LT_POSP(pos1, pos2)) + { + getvvcol(wp, pos1, &from1, NULL, &to1); + getvvcol(wp, pos2, &from2, NULL, &to2); + } + else + { + getvvcol(wp, pos2, &from1, NULL, &to1); + getvvcol(wp, pos1, &from2, NULL, &to2); + } + if (from2 < from1) + *left = from2; + else + *left = from1; + if (to2 > to1) + { + if (*p_sel == 'e' && from2 - 1 >= to1) + *right = from2 - 1; + else + *right = to2; + } + else + *right = to1; +} + +/* + * skipwhite: skip over ' ' and '\t'. + */ + char_u * +skipwhite(char_u *q) +{ + char_u *p = q; + + while (VIM_ISWHITE(*p)) /* skip to next non-white */ + ++p; + return p; +} + +/* + * getwhitecols: return the number of whitespace + * columns (bytes) at the start of a given line + */ + int +getwhitecols_curline() +{ + return getwhitecols(ml_get_curline()); +} + + int +getwhitecols(char_u *p) +{ + return skipwhite(p) - p; +} + +/* + * skip over digits + */ + char_u * +skipdigits(char_u *q) +{ + char_u *p = q; + + while (VIM_ISDIGIT(*p)) /* skip to next non-digit */ + ++p; + return p; +} + +#if defined(FEAT_SYN_HL) || defined(FEAT_SPELL) || defined(PROTO) +/* + * skip over binary digits + */ + char_u * +skipbin(char_u *q) +{ + char_u *p = q; + + while (vim_isbdigit(*p)) /* skip to next non-digit */ + ++p; + return p; +} + +/* + * skip over digits and hex characters + */ + char_u * +skiphex(char_u *q) +{ + char_u *p = q; + + while (vim_isxdigit(*p)) /* skip to next non-digit */ + ++p; + return p; +} +#endif + +/* + * skip to bin digit (or NUL after the string) + */ + char_u * +skiptobin(char_u *q) +{ + char_u *p = q; + + while (*p != NUL && !vim_isbdigit(*p)) /* skip to next digit */ + ++p; + return p; +} + +/* + * skip to digit (or NUL after the string) + */ + char_u * +skiptodigit(char_u *q) +{ + char_u *p = q; + + while (*p != NUL && !VIM_ISDIGIT(*p)) /* skip to next digit */ + ++p; + return p; +} + +/* + * skip to hex character (or NUL after the string) + */ + char_u * +skiptohex(char_u *q) +{ + char_u *p = q; + + while (*p != NUL && !vim_isxdigit(*p)) /* skip to next digit */ + ++p; + return p; +} + +/* + * Variant of isdigit() that can handle characters > 0x100. + * We don't use isdigit() here, because on some systems it also considers + * superscript 1 to be a digit. + * Use the VIM_ISDIGIT() macro for simple arguments. + */ + int +vim_isdigit(int c) +{ + return (c >= '0' && c <= '9'); +} + +/* + * Variant of isxdigit() that can handle characters > 0x100. + * We don't use isxdigit() here, because on some systems it also considers + * superscript 1 to be a digit. + */ + int +vim_isxdigit(int c) +{ + return (c >= '0' && c <= '9') + || (c >= 'a' && c <= 'f') + || (c >= 'A' && c <= 'F'); +} + +/* + * Corollary of vim_isdigit and vim_isxdigit() that can handle + * characters > 0x100. + */ + int +vim_isbdigit(int c) +{ + return (c == '0' || c == '1'); +} + +/* + * Vim's own character class functions. These exist because many library + * islower()/toupper() etc. do not work properly: they crash when used with + * invalid values or can't handle latin1 when the locale is C. + * Speed is most important here. + */ +#define LATIN1LOWER 'l' +#define LATIN1UPPER 'U' + +static char_u latin1flags[257] = " UUUUUUUUUUUUUUUUUUUUUUUUUU llllllllllllllllllllllllll UUUUUUUUUUUUUUUUUUUUUUU UUUUUUUllllllllllllllllllllllll llllllll"; +static char_u latin1upper[257] = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`ABCDEFGHIJKLMNOPQRSTUVWXYZ{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xf7\xd8\xd9\xda\xdb\xdc\xdd\xde\xff"; +static char_u latin1lower[257] = " !\"#$%&'()*+,-./0123456789:;<=>?@abcdefghijklmnopqrstuvwxyz[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xd7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"; + + int +vim_islower(int c) +{ + if (c <= '@') + return FALSE; + if (c >= 0x80) + { + if (enc_utf8) + return utf_islower(c); + if (c >= 0x100) + { +#ifdef HAVE_ISWLOWER + if (has_mbyte) + return iswlower(c); +#endif + /* islower() can't handle these chars and may crash */ + return FALSE; + } + if (enc_latin1like) + return (latin1flags[c] & LATIN1LOWER) == LATIN1LOWER; + } + return islower(c); +} + + int +vim_isupper(int c) +{ + if (c <= '@') + return FALSE; + if (c >= 0x80) + { + if (enc_utf8) + return utf_isupper(c); + if (c >= 0x100) + { +#ifdef HAVE_ISWUPPER + if (has_mbyte) + return iswupper(c); +#endif + /* islower() can't handle these chars and may crash */ + return FALSE; + } + if (enc_latin1like) + return (latin1flags[c] & LATIN1UPPER) == LATIN1UPPER; + } + return isupper(c); +} + + int +vim_toupper(int c) +{ + if (c <= '@') + return c; + if (c >= 0x80 || !(cmp_flags & CMP_KEEPASCII)) + { + if (enc_utf8) + return utf_toupper(c); + if (c >= 0x100) + { +#ifdef HAVE_TOWUPPER + if (has_mbyte) + return towupper(c); +#endif + /* toupper() can't handle these chars and may crash */ + return c; + } + if (enc_latin1like) + return latin1upper[c]; + } + if (c < 0x80 && (cmp_flags & CMP_KEEPASCII)) + return TOUPPER_ASC(c); + return TOUPPER_LOC(c); +} + + int +vim_tolower(int c) +{ + if (c <= '@') + return c; + if (c >= 0x80 || !(cmp_flags & CMP_KEEPASCII)) + { + if (enc_utf8) + return utf_tolower(c); + if (c >= 0x100) + { +#ifdef HAVE_TOWLOWER + if (has_mbyte) + return towlower(c); +#endif + /* tolower() can't handle these chars and may crash */ + return c; + } + if (enc_latin1like) + return latin1lower[c]; + } + if (c < 0x80 && (cmp_flags & CMP_KEEPASCII)) + return TOLOWER_ASC(c); + return TOLOWER_LOC(c); +} + +/* + * skiptowhite: skip over text until ' ' or '\t' or NUL. + */ + char_u * +skiptowhite(char_u *p) +{ + while (*p != ' ' && *p != '\t' && *p != NUL) + ++p; + return p; +} + +/* + * skiptowhite_esc: Like skiptowhite(), but also skip escaped chars + */ + char_u * +skiptowhite_esc(char_u *p) +{ + while (*p != ' ' && *p != '\t' && *p != NUL) + { + if ((*p == '\\' || *p == Ctrl_V) && *(p + 1) != NUL) + ++p; + ++p; + } + return p; +} + +/* + * Getdigits: Get a number from a string and skip over it. + * Note: the argument is a pointer to a char_u pointer! + */ + long +getdigits(char_u **pp) +{ + char_u *p; + long retval; + + p = *pp; + retval = atol((char *)p); + if (*p == '-') /* skip negative sign */ + ++p; + p = skipdigits(p); /* skip to next non-digit */ + *pp = p; + return retval; +} + +/* + * Return TRUE if "lbuf" is empty or only contains blanks. + */ + int +vim_isblankline(char_u *lbuf) +{ + char_u *p; + + p = skipwhite(lbuf); + return (*p == NUL || *p == '\r' || *p == '\n'); +} + +/* + * Convert a string into a long and/or unsigned long, taking care of + * hexadecimal, octal, and binary numbers. Accepts a '-' sign. + * If "prep" is not NULL, returns a flag to indicate the type of the number: + * 0 decimal + * '0' octal + * 'B' bin + * 'b' bin + * 'X' hex + * 'x' hex + * If "len" is not NULL, the length of the number in characters is returned. + * If "nptr" is not NULL, the signed result is returned in it. + * If "unptr" is not NULL, the unsigned result is returned in it. + * If "what" contains STR2NR_BIN recognize binary numbers + * If "what" contains STR2NR_OCT recognize octal numbers + * If "what" contains STR2NR_HEX recognize hex numbers + * If "what" contains STR2NR_FORCE always assume bin/oct/hex. + * If maxlen > 0, check at a maximum maxlen chars. + */ + void +vim_str2nr( + char_u *start, + int *prep, /* return: type of number 0 = decimal, 'x' + or 'X' is hex, '0' = octal, 'b' or 'B' + is bin */ + int *len, /* return: detected length of number */ + int what, /* what numbers to recognize */ + varnumber_T *nptr, /* return: signed result */ + uvarnumber_T *unptr, /* return: unsigned result */ + int maxlen) /* max length of string to check */ +{ + char_u *ptr = start; + int pre = 0; /* default is decimal */ + int negative = FALSE; + uvarnumber_T un = 0; + int n; + + if (ptr[0] == '-') + { + negative = TRUE; + ++ptr; + } + + /* Recognize hex, octal, and bin. */ + if (ptr[0] == '0' && ptr[1] != '8' && ptr[1] != '9' + && (maxlen == 0 || maxlen > 1)) + { + pre = ptr[1]; + if ((what & STR2NR_HEX) + && (pre == 'X' || pre == 'x') && vim_isxdigit(ptr[2]) + && (maxlen == 0 || maxlen > 2)) + /* hexadecimal */ + ptr += 2; + else if ((what & STR2NR_BIN) + && (pre == 'B' || pre == 'b') && vim_isbdigit(ptr[2]) + && (maxlen == 0 || maxlen > 2)) + /* binary */ + ptr += 2; + else + { + /* decimal or octal, default is decimal */ + pre = 0; + if (what & STR2NR_OCT) + { + /* Don't interpret "0", "08" or "0129" as octal. */ + for (n = 1; n != maxlen && VIM_ISDIGIT(ptr[n]); ++n) + { + if (ptr[n] > '7') + { + pre = 0; /* can't be octal */ + break; + } + pre = '0'; /* assume octal */ + } + } + } + } + + /* + * Do the string-to-numeric conversion "manually" to avoid sscanf quirks. + */ + n = 1; + if (pre == 'B' || pre == 'b' || what == STR2NR_BIN + STR2NR_FORCE) + { + /* bin */ + if (pre != 0) + n += 2; /* skip over "0b" */ + while ('0' <= *ptr && *ptr <= '1') + { + /* avoid ubsan error for overflow */ + if (un <= UVARNUM_MAX / 2) + un = 2 * un + (uvarnumber_T)(*ptr - '0'); + else + un = UVARNUM_MAX; + ++ptr; + if (n++ == maxlen) + break; + } + } + else if (pre == '0' || what == STR2NR_OCT + STR2NR_FORCE) + { + /* octal */ + while ('0' <= *ptr && *ptr <= '7') + { + /* avoid ubsan error for overflow */ + if (un <= UVARNUM_MAX / 8) + un = 8 * un + (uvarnumber_T)(*ptr - '0'); + else + un = UVARNUM_MAX; + ++ptr; + if (n++ == maxlen) + break; + } + } + else if (pre != 0 || what == STR2NR_HEX + STR2NR_FORCE) + { + /* hex */ + if (pre != 0) + n += 2; /* skip over "0x" */ + while (vim_isxdigit(*ptr)) + { + /* avoid ubsan error for overflow */ + if (un <= UVARNUM_MAX / 16) + un = 16 * un + (uvarnumber_T)hex2nr(*ptr); + else + un = UVARNUM_MAX; + ++ptr; + if (n++ == maxlen) + break; + } + } + else + { + /* decimal */ + while (VIM_ISDIGIT(*ptr)) + { + uvarnumber_T digit = (uvarnumber_T)(*ptr - '0'); + + /* avoid ubsan error for overflow */ + if (un < UVARNUM_MAX / 10 + || (un == UVARNUM_MAX / 10 && digit <= UVARNUM_MAX % 10)) + un = 10 * un + digit; + else + un = UVARNUM_MAX; + ++ptr; + if (n++ == maxlen) + break; + } + } + + if (prep != NULL) + *prep = pre; + if (len != NULL) + *len = (int)(ptr - start); + if (nptr != NULL) + { + if (negative) /* account for leading '-' for decimal numbers */ + { + /* avoid ubsan error for overflow */ + if (un > VARNUM_MAX) + *nptr = VARNUM_MIN; + else + *nptr = -(varnumber_T)un; + } + else + { + if (un > VARNUM_MAX) + un = VARNUM_MAX; + *nptr = (varnumber_T)un; + } + } + if (unptr != NULL) + *unptr = un; +} + +/* + * Return the value of a single hex character. + * Only valid when the argument is '0' - '9', 'A' - 'F' or 'a' - 'f'. + */ + int +hex2nr(int c) +{ + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + if (c >= 'A' && c <= 'F') + return c - 'A' + 10; + return c - '0'; +} + +#if defined(FEAT_TERMRESPONSE) || defined(FEAT_GUI_GTK) || defined(PROTO) +/* + * Convert two hex characters to a byte. + * Return -1 if one of the characters is not hex. + */ + int +hexhex2nr(char_u *p) +{ + if (!vim_isxdigit(p[0]) || !vim_isxdigit(p[1])) + return -1; + return (hex2nr(p[0]) << 4) + hex2nr(p[1]); +} +#endif + +/* + * Return TRUE if "str" starts with a backslash that should be removed. + * For MS-DOS, WIN32 and OS/2 this is only done when the character after the + * backslash is not a normal file name character. + * '$' is a valid file name character, we don't remove the backslash before + * it. This means it is not possible to use an environment variable after a + * backslash. "C:\$VIM\doc" is taken literally, only "$VIM\doc" works. + * Although "\ name" is valid, the backslash in "Program\ files" must be + * removed. Assume a file name doesn't start with a space. + * For multi-byte names, never remove a backslash before a non-ascii + * character, assume that all multi-byte characters are valid file name + * characters. + */ + int +rem_backslash(char_u *str) +{ +#ifdef BACKSLASH_IN_FILENAME + return (str[0] == '\\' + && str[1] < 0x80 + && (str[1] == ' ' + || (str[1] != NUL + && str[1] != '*' + && str[1] != '?' + && !vim_isfilec(str[1])))); +#else + return (str[0] == '\\' && str[1] != NUL); +#endif +} + +/* + * Halve the number of backslashes in a file name argument. + * For MS-DOS we only do this if the character after the backslash + * is not a normal file character. + */ + void +backslash_halve(char_u *p) +{ + for ( ; *p; ++p) + if (rem_backslash(p)) + STRMOVE(p, p + 1); +} + +/* + * backslash_halve() plus save the result in allocated memory. + */ + char_u * +backslash_halve_save(char_u *p) +{ + char_u *res; + + res = vim_strsave(p); + if (res == NULL) + return p; + backslash_halve(res); + return res; +} + +#if (defined(EBCDIC) && defined(FEAT_POSTSCRIPT)) || defined(PROTO) +/* + * Table for EBCDIC to ASCII conversion unashamedly taken from xxd.c! + * The first 64 entries have been added to map control characters defined in + * ascii.h + */ +static char_u ebcdic2ascii_tab[256] = +{ + 0000, 0001, 0002, 0003, 0004, 0011, 0006, 0177, + 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017, + 0020, 0021, 0022, 0023, 0024, 0012, 0010, 0027, + 0030, 0031, 0032, 0033, 0033, 0035, 0036, 0037, + 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047, + 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057, + 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067, + 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077, + 0040, 0240, 0241, 0242, 0243, 0244, 0245, 0246, + 0247, 0250, 0325, 0056, 0074, 0050, 0053, 0174, + 0046, 0251, 0252, 0253, 0254, 0255, 0256, 0257, + 0260, 0261, 0041, 0044, 0052, 0051, 0073, 0176, + 0055, 0057, 0262, 0263, 0264, 0265, 0266, 0267, + 0270, 0271, 0313, 0054, 0045, 0137, 0076, 0077, + 0272, 0273, 0274, 0275, 0276, 0277, 0300, 0301, + 0302, 0140, 0072, 0043, 0100, 0047, 0075, 0042, + 0303, 0141, 0142, 0143, 0144, 0145, 0146, 0147, + 0150, 0151, 0304, 0305, 0306, 0307, 0310, 0311, + 0312, 0152, 0153, 0154, 0155, 0156, 0157, 0160, + 0161, 0162, 0136, 0314, 0315, 0316, 0317, 0320, + 0321, 0345, 0163, 0164, 0165, 0166, 0167, 0170, + 0171, 0172, 0322, 0323, 0324, 0133, 0326, 0327, + 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337, + 0340, 0341, 0342, 0343, 0344, 0135, 0346, 0347, + 0173, 0101, 0102, 0103, 0104, 0105, 0106, 0107, + 0110, 0111, 0350, 0351, 0352, 0353, 0354, 0355, + 0175, 0112, 0113, 0114, 0115, 0116, 0117, 0120, + 0121, 0122, 0356, 0357, 0360, 0361, 0362, 0363, + 0134, 0237, 0123, 0124, 0125, 0126, 0127, 0130, + 0131, 0132, 0364, 0365, 0366, 0367, 0370, 0371, + 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067, + 0070, 0071, 0372, 0373, 0374, 0375, 0376, 0377 +}; + +/* + * Convert a buffer worth of characters from EBCDIC to ASCII. Only useful if + * wanting 7-bit ASCII characters out the other end. + */ + void +ebcdic2ascii(char_u *buffer, int len) +{ + int i; + + for (i = 0; i < len; i++) + buffer[i] = ebcdic2ascii_tab[buffer[i]]; +} +#endif |