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Diffstat (limited to 'src/nvim/charset.c')
| -rw-r--r-- | src/nvim/charset.c | 1918 |
1 files changed, 1918 insertions, 0 deletions
diff --git a/src/nvim/charset.c b/src/nvim/charset.c new file mode 100644 index 0000000000..5217eb2c0a --- /dev/null +++ b/src/nvim/charset.c @@ -0,0 +1,1918 @@ +/// @file charset.c +/// +/// Code related to character sets. + +#include <string.h> +#include <wctype.h> +#include <wchar.h> // for towupper() and towlower() + +#include "vim.h" +#include "charset.h" +#include "farsi.h" +#include "main.h" +#include "mbyte.h" +#include "memline.h" +#include "memory.h" +#include "misc1.h" +#include "misc2.h" +#include "garray.h" +#include "move.h" +#include "os_unix.h" + +static int win_chartabsize(win_T *wp, char_u *p, colnr_T col); + +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))) + +/// Fill 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 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 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); +} + +/// Helper for init_chartab +/// +/// @param global FALSE: only set buf->b_chartab[] +/// +/// @return FAIL if 'iskeyword', 'isident', 'isfname' or 'isprint' option has +/// an error, OK otherwise. +int buf_init_chartab(buf_T *buf, int global) +{ + 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 < ' ') { + chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2; + } + + while (c <= '~') { + chartab[c++] = 1 + CT_PRINT_CHAR; + } + + if (p_altkeymap) { + while (c < YE) { + chartab[c++] = 1 + CT_PRINT_CHAR; + } + } + + while (c < 256) { + if (enc_utf8 && (c >= 0xa0)) { + // UTF-8: bytes 0xa0 - 0xff are printable (latin1) + chartab[c++] = CT_PRINT_CHAR + 1; + } else if ((enc_dbcs == DBCS_JPNU) && (c == 0x8e)) { + // euc-jp characters starting with 0x8e are single width + chartab[c++] = CT_PRINT_CHAR + 1; + } else if ((enc_dbcs != 0) && (MB_BYTE2LEN(c) == 2)) { + // other double-byte chars can be printable AND double-width + chartab[c++] = CT_PRINT_CHAR + 2; + } else { + // the rest is unprintable by default + 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))) { + chartab[c] |= CT_FNAME_CHAR; + } + } + } + + // Init word char flags all to FALSE + 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); + } + } + } + + // In lisp mode the '-' character is included in keywords. + if (buf->b_p_lisp) { + SET_CHARTAB(buf, '-'); + } + + // 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) { + // first round: 'isident' + p = p_isi; + } else if (i == 1) { + // second round: 'isprint' + p = p_isp; + } else if (i == 2) { + // third round: 'isfname' + p = p_isf; + } else { // i == 3 + // fourth round: 'iskeyword' + p = buf->b_p_isk; + } + + 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 + || vim_islower(c) + || vim_isupper(c) + || (p_altkeymap && (F_isalpha(c) || F_isdigit(c)))) { + if (i == 0) { + // (re)set ID flag + if (tilde) { + chartab[c] &= ~CT_ID_CHAR; + } else { + chartab[c] |= CT_ID_CHAR; + } + } else if (i == 1) { + // (re)set printable + // For double-byte we keep the cell width, so + // that we can detect it from the first byte. + if (((c < ' ') + || (c > '~') + || (p_altkeymap && (F_isalpha(c) || F_isdigit(c)))) + && !(enc_dbcs && (MB_BYTE2LEN(c) == 2))) { + if (tilde) { + chartab[c] = (chartab[c] & ~CT_CELL_MASK) + + ((dy_flags & DY_UHEX) ? 4 : 2); + chartab[c] &= ~CT_PRINT_CHAR; + } else { + chartab[c] = (chartab[c] & ~CT_CELL_MASK) + 1; + chartab[c] |= CT_PRINT_CHAR; + } + } + } else if (i == 2) { + // (re)set fname flag + if (tilde) { + chartab[c] &= ~CT_FNAME_CHAR; + } else { + 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. +/// +/// @param buf +/// @param bufsize +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; + } + memmove(buf + trs_len, buf + 1, (size_t)len); + } + 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. +/// +/// @param s +/// +/// @return translated string +char_u *transstr(char_u *s) +{ + char_u *res; + char_u *p; + int l, c; + char_u hexbuf[11]; + + if (has_mbyte) { + // Compute the length of the result, taking account of unprintable + // multi-byte characters. + size_t 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 += STRLEN(hexbuf); + } + } else { + l = byte2cells(*p++); + + if (l > 0) { + len += l; + } else { + // illegal byte sequence + len += 4; + } + } + } + res = xmallocz(len); + } else { + res = xmallocz(vim_strsize(s)); + } + + *res = NUL; + p = s; + + while (*p != NUL) { + if (has_mbyte && ((l = (*mb_ptr2len)(p)) > 1)) { + c = (*mb_ptr2char)(p); + + if (vim_isprintc(c)) { + // append printable multi-byte char + STRNCAT(res, p, l); + } else { + transchar_hex(res + STRLEN(res), c); + } + p += l; + } else { + STRCAT(res, transchar_byte(*p++)); + } + } + + return res; +} + +#endif // if defined(FEAT_EVAL) || defined(FEAT_TITLE) + // || 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]". +/// +/// @param str +/// @param orglen +/// @param buf +/// @param buflen +/// +/// @return converted string. +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_init(&ga, 1, 10); + + ga_grow(&ga, len + 1); + memmove(ga.ga_data, str, (size_t)len); + ga.ga_len = len; + } else { + if (len >= buflen) { + // Ugly! + len = buflen - 1; + } + 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); + } else { + if (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; +} + +// Catch 22: 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 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]; + +/// Translates a character +/// +/// @param c +/// +/// @return translated character. +char_u* transchar(int c) +{ + int 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 && (((c >= ' ') && (c <= '~')) || F_ischar(c))) + || ((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. +/// +/// @param c +/// +/// @return pointer to translated character in transchar_buf. +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. +/// +/// @param buf +/// @param c +void transchar_nonprint(char_u *buf, int c) +{ + if (c == NL) { + // we use newline in place of a NUL + c = NUL; + } else if ((c == CAR) && (get_fileformat(curbuf) == EOL_MAC)) { + // we use CR in place of NL in this case + c = NL; + } + + if (dy_flags & DY_UHEX) { + // 'display' has "uhex" + transchar_hex(buf, c); + } else if (c <= 0x7f) { + // 0x00 - 0x1f and 0x7f + buf[0] = '^'; + // DEL displayed as ^? + buf[1] = c ^ 0x40; + + buf[2] = NUL; + } else if (enc_utf8 && (c >= 0x80)) { + transchar_hex(buf, c); + } else if ((c >= ' ' + 0x80) && (c <= '~' + 0x80)) { + // 0xa0 - 0xfe + buf[0] = '|'; + buf[1] = c - 0x80; + buf[2] = NUL; + } 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] = '~'; + buf[1] = (c - 0x80) ^ 0x40; + // 0xff displayed as ~? + buf[2] = NUL; + } +} + +/// Convert a non-printable character to hex. +/// +/// @param buf +/// @param c +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. +/// +/// @param c +/// +/// @return the hex character. +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. +/// +/// @param b +/// +/// @reeturn Number of display cells. +int byte2cells(int b) +{ + if (enc_utf8 && (b >= 0x80)) { + return 0; + } + return 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>". +/// +/// @param c +/// +/// @return Number of display cells. +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 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>". +/// +/// @param p +/// +/// @return number of display cells. +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 chartab[*p] & CT_CELL_MASK; +} + +/// Return the number of character cells string "s" will take on the screen, +/// counting TABs as two characters: "^I". +/// +/// 's' must be non-null. +/// +/// @param s +/// +/// @return number of character cells. +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". +/// +/// 's' must be non-null. +/// +/// @param s +/// @param len +/// +/// @return Number of character cells. +int vim_strnsize(char_u *s, int len) +{ + assert(s != NULL); + 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. +/// +/// @param p +/// @param col +/// +/// @return Number of characters. +#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); \ + } + +#if defined(FEAT_VREPLACE) \ + || defined(FEAT_EX_EXTRA) \ + || defined(FEAT_GUI) \ + || defined(FEAT_VIRTUALEDIT) \ + || defined(PROTO) +int chartabsize(char_u *p, colnr_T col) +{ + RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, p, col) +} + +#endif /* if defined(FEAT_VREPLACE) || defined(FEAT_EX_EXTRA) || + defined(FEAT_GUI) || defined(FEAT_VIRTUALEDIT) || defined(PROTO) */ + +static int win_chartabsize(win_T *wp, char_u *p, colnr_T col) +{ + RET_WIN_BUF_CHARTABSIZE(wp, wp->w_buffer, p, col) +} + +/// Return the number of characters the string 's' will take on the screen, +/// taking into account the size of a tab. +/// +/// @param s +/// +/// @return Number of characters the string will take on the screen. +int linetabsize(char_u *s) +{ + return linetabsize_col(0, s); +} + +/// Like linetabsize(), but starting at column "startcol". +/// +/// @param startcol +/// @param s +/// +/// @return Number of characters the string will take on the screen. +int linetabsize_col(int startcol, char_u *s) +{ + colnr_T col = startcol; + + while (*s != NUL) { + col += lbr_chartabsize_adv(&s, col); + } + return (int)col; +} + +/// Like linetabsize(), but for a given window instead of the current one. +/// +/// @param wp +/// @param p +/// @param len +/// +/// @return Number of characters the string will take on the screen. +int win_linetabsize(win_T *wp, char_u *p, colnr_T len) +{ + colnr_T col = 0; + char_u *s; + + for (s = p; *s != NUL && (len == MAXCOL || s < p + len); mb_ptr_adv(s)) { + col += win_lbr_chartabsize(wp, s, col, NULL); + } + return (int)col; +} + +/// Return TRUE if 'c' is a normal identifier character: +/// +/// Letters and characters from the 'isident' option. +/// +/// @param c +/// +/// @return TRUE if 'c' is a normal identifier character. +int vim_isIDc(int c) +{ + return c > 0 && c < 0x100 && (chartab[c] & CT_ID_CHAR); +} + +/// return TRUE if 'c' is a keyword character: Letters and characters from +/// 'iskeyword' option for current buffer. +/// +/// For multi-byte characters mb_get_class() is used (builtin rules). +/// +/// @param c +/// +/// @return TRUE if 'c' is a keyword character. +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(c) >= 2; + } + } + return c > 0 && c < 0x100 && GET_CHARTAB(buf, c) != 0; +} + +/// Just like vim_iswordc() but uses a pointer to the (multi-byte) character. +/// +/// @param p +/// +/// @return TRUE if 'p' points to a keyword character. +int vim_iswordp(char_u *p) +{ + if (has_mbyte && (MB_BYTE2LEN(*p) > 1)) { + return mb_get_class(p) >= 2; + } + return GET_CHARTAB(curbuf, *p) != 0; +} + +int vim_iswordp_buf(char_u *p, buf_T *buf) +{ + if (has_mbyte && (MB_BYTE2LEN(*p) > 1)) { + return mb_get_class(p) >= 2; + } + return GET_CHARTAB(buf, *p) != 0; +} + +/// return TRUE if 'c' is a valid file-name character +/// Assume characters above 0x100 are valid (multi-byte). +/// +/// @param c +/// +/// @return TRUE if 'c' is a valid file name character. +int vim_isfilec(int c) +{ + return c >= 0x100 || (c > 0 && (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. +/// +/// @param c +/// +/// @return TRUE if 'c' is a valid file-name character or wildcard character. +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. +/// +/// @param c +/// +/// @return TRUE if 'c' a printable character. +int vim_isprintc(int c) +{ + if (enc_utf8 && (c >= 0x100)) { + return utf_printable(c); + } + return c >= 0x100 || (c > 0 && (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. +/// +/// @param c +/// +/// @return TRUE if 'c' is a printable 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 && (chartab[c] & CT_PRINT_CHAR)); +} + +/// like chartabsize(), but also check for line breaks on the screen +/// +/// @param s +/// @param col +/// +/// @return The number of characters taken up on the screen. +int lbr_chartabsize(unsigned char *s, colnr_T col) +{ + if (!curwin->w_p_lbr && (*p_sbr == NUL)) { + if (curwin->w_p_wrap) { + return win_nolbr_chartabsize(curwin, s, col, NULL); + } + RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, s, col) + } + return win_lbr_chartabsize(curwin, s, col, NULL); +} + +/// Call lbr_chartabsize() and advance the pointer. +/// +/// @param s +/// @param col +/// +/// @return The number of characters take up on the screen. +int lbr_chartabsize_adv(char_u **s, colnr_T col) +{ + int retval; + + retval = lbr_chartabsize(*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. +/// +/// @param wp +/// @param s +/// @param col +/// @param headp +/// +/// @return The number of characters taken up on the screen. +int win_lbr_chartabsize(win_T *wp, char_u *s, colnr_T col, int *headp) +{ + colnr_T col2; + colnr_T colmax; + int added; + int mb_added = 0; + int numberextra; + char_u *ps; + int tab_corr = (*s == TAB); + int n; + + // No 'linebreak' and 'showbreak': return quickly. + if (!wp->w_p_lbr && (*p_sbr == NUL)) { + if (wp->w_p_wrap) { + return win_nolbr_chartabsize(wp, s, col, headp); + } + RET_WIN_BUF_CHARTABSIZE(wp, wp->w_buffer, s, col) + } + + // First get normal size, without 'linebreak' + int size = win_chartabsize(wp, s, col); + int c = *s; + + // 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(s[1]) + && !wp->w_p_list + && 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)(W_WIDTH(wp) - numberextra); + + if (col >= colmax) { + n = colmax + win_col_off2(wp); + + if (n > 0) { + colmax += (((col - colmax) / n) + 1) * n; + } + } + + for (;;) { + ps = s; + mb_ptr_adv(s); + c = *s; + + if (!((c != NUL) + && (vim_isbreak(c) + || (!vim_isbreak(c) + && ((col2 == col) || !vim_isbreak(*ps)))))) { + break; + } + + col2 += win_chartabsize(wp, s, col2); + + if (col2 >= colmax) { /* doesn't fit */ + size = colmax - col; + tab_corr = FALSE; + break; + } + } + } else if (has_mbyte + && (size == 2) + && (MB_BYTE2LEN(*s) > 1) + && wp->w_p_wrap + && in_win_border(wp, col)) { + // Count the ">" in the last column. + ++size; + mb_added = 1; + } + + // May have to add something for 'showbreak' string at start of line + // Set *headp to the size of what we add. + added = 0; + + if ((*p_sbr != NUL) && wp->w_p_wrap && (col != 0)) { + numberextra = win_col_off(wp); + col += numberextra + mb_added; + + if (col >= (colnr_T)W_WIDTH(wp)) { + col -= W_WIDTH(wp); + numberextra = W_WIDTH(wp) - (numberextra - win_col_off2(wp)); + if (numberextra > 0) { + col = col % numberextra; + } + } + + if ((col == 0) || (col + size > (colnr_T)W_WIDTH(wp))) { + added = vim_strsize(p_sbr); + if (tab_corr) { + size += (added / wp->w_buffer->b_p_ts) * wp->w_buffer->b_p_ts; + } else { + size += added; + } + + if (col != 0) { + added = 0; + } + } + } + + if (headp != NULL) { + *headp = added + mb_added; + } + return size; +} + +/// 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. +/// +/// @param wp +/// @param s +/// @param col +/// @param headp +/// +/// @return The number of characters take up on the screen. +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)) { + n = wp->w_buffer->b_p_ts; + return (int)(n - (col % n)); + } + 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". +/// +/// @param wp +/// @param vcol +/// +/// @return TRUE if the virtual column is in the rightmost column. +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 = W_WIDTH(wp) - 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! +/// +/// @param wp +/// @param pos +/// @param start +/// @param cursor +/// @param end +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 + int incr; + int head; + int ts = wp->w_buffer->b_p_ts; + int c; + + vcol = 0; + ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE); + + if (pos->col == MAXCOL) { + // continue until the NUL + posptr = NULL; + } else { + posptr = ptr + pos->col; + } + + // This function is used very often, do some speed optimizations. + // When 'list', 'linebreak' and 'showbreak' 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)) + && !wp->w_p_lbr + && (*p_sbr == NUL)) { + for (;;) { + head = 0; + c = *ptr; + + // make sure we don't go past the end of the line + if (c == NUL) { + // NUL at end of line only takes one column + incr = 1; + break; + } + + // A tab gets expanded, depending on the current column + if (c == TAB) { + incr = ts - (vcol % ts); + } 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 = CHARSIZE(c); + } + + // 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 = CHARSIZE(c); + } + } + + 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, ptr, vcol, &head); + + // make sure we don't go past the end of the line + if (*ptr == NUL) { + // NUL at end of line only takes one column + incr = 1; + 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, VIsual)))) { + // cursor at end + *cursor = vcol + incr - 1; + } else { + // cursor at start + *cursor = vcol + head; + } + } +} + +/// Get virtual cursor column in the current window, pretending 'list' is off. +/// +/// @param posp +/// +/// @retujrn The virtual cursor column. +colnr_T getvcol_nolist(pos_T *posp) +{ + int list_save = curwin->w_p_list; + colnr_T vcol; + + curwin->w_p_list = FALSE; + getvcol(curwin, posp, NULL, &vcol, NULL); + curwin->w_p_list = list_save; + return vcol; +} + +/// Get virtual column in virtual mode. +/// +/// @param wp +/// @param pos +/// @param start +/// @param cursor +/// @param end +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. +/// +/// @param wp +/// @param pos1 +/// @param pos2 +/// @param left +/// @param right +void getvcols(win_T *wp, pos_T *pos1, pos_T *pos2, colnr_T *left, + colnr_T *right) +{ + colnr_T from1; + colnr_T from2; + colnr_T to1; + colnr_T to2; + + if (ltp(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'. +/// +/// @param q +/// +/// @return Pointer to character after the skipped whitespace. +char_u* skipwhite(char_u *q) +{ + char_u *p = q; + while (vim_iswhite(*p)) { + // skip to next non-white + p++; + } + return p; +} + +/// skip over digits +/// +/// @param q +/// +/// @return Pointer to the character after the skipped digits. +char_u* skipdigits(char_u *q) +{ + char_u *p = q; + while (VIM_ISDIGIT(*p)) { + // skip to next non-digit + p++; + } + return p; +} + +/// skip over digits and hex characters +/// +/// @param q +/// +/// @return Pointer to the character after the skipped 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; +} + +/// skip to digit (or NUL after the string) +/// +/// @param q +/// +/// @return Pointer to the 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) +/// +/// @param q +/// +/// @return Pointer to the 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. +/// +/// @param c +/// +/// @return TRUE if the character is a digit. +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. +/// +/// @param c +/// +/// @return TRUE if the character is a digit. +int vim_isxdigit(int c) +{ + return (c >= '0' && c <= '9') + || (c >= 'a' && c <= 'f') + || (c >= 'A' && c <= 'F'); +} + +// 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) { + if (has_mbyte) { + return iswlower(c); + } + + // 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) { + if (has_mbyte) { + return iswupper(c); + } + + // 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) { + if (enc_utf8) { + return utf_toupper(c); + } + + if (c >= 0x100) { + if (has_mbyte) { + return towupper(c); + } + + // toupper() can't handle these chars and may crash + return c; + } + + if (enc_latin1like) { + return latin1upper[c]; + } + } + return TOUPPER_LOC(c); +} + +int vim_tolower(int c) +{ + if (c <= '@') { + return c; + } + + if (c >= 0x80) { + if (enc_utf8) { + return utf_tolower(c); + } + + if (c >= 0x100) { + if (has_mbyte) { + return towlower(c); + } + + // tolower() can't handle these chars and may crash + return c; + } + + if (enc_latin1like) { + return latin1lower[c]; + } + } + return TOLOWER_LOC(c); +} + +/// skiptowhite: skip over text until ' ' or '\t' or NUL. +/// +/// @param p +/// +/// @return Pointer to the next whitespace or NUL character. +char_u* skiptowhite(char_u *p) +{ + while (*p != ' ' && *p != '\t' && *p != NUL) { + p++; + } + return p; +} + +/// skiptowhite_esc: Like skiptowhite(), but also skip escaped chars +/// +/// @param p +/// +/// @return Pointer to the next whitespace character. +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! +/// +/// @param pp +/// +/// @return Number from the string. +long getdigits(char_u **pp) +{ + char_u *p = *pp; + long retval = atol((char *)p); + + if (*p == '-') { + // skip negative sign + ++p; + } + // skip to next non-digit + p = skipdigits(p); + *pp = p; + return retval; +} + +/// Return TRUE if "lbuf" is empty or only contains blanks. +/// +/// @param lbuf +/// +/// @return TRUE if `lbuf` is empty or only contains blanks. +int vim_isblankline(char_u *lbuf) +{ + char_u *p = skipwhite(lbuf); + return *p == NUL || *p == '\r' || *p == '\n'; +} + +/// Convert a string into a long and/or unsigned long, taking care of +/// hexadecimal and octal numbers. Accepts a '-' sign. +/// If "hexp" is not NULL, returns a flag to indicate the type of the number: +/// 0 decimal +/// '0' octal +/// '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 "dooct" is non-zero recognize octal numbers, when > 1 always assume +/// octal number. +/// If "dohex" is non-zero recognize hex numbers, when > 1 always assume +/// hex number. +/// +/// @param start +/// @param hexp Returns type of number 0 = decimal, 'x' or 'X' is hex, +// '0' = octal +/// @param len Returns the detected length of number. +/// @param dooct recognize octal number +/// @param dohex recognize hex number +/// @param nptr Returns the signed result. +/// @param unptr Returns the unsigned result. +void vim_str2nr(char_u *start, int *hexp, int *len, int dooct, int dohex, + long *nptr, unsigned long *unptr) +{ + char_u *ptr = start; + int hex = 0; // default is decimal + int negative = FALSE; + unsigned long un = 0; + int n; + + if (ptr[0] == '-') { + negative = TRUE; + ++ptr; + } + + // Recognize hex and octal. + if ((ptr[0] == '0') && (ptr[1] != '8') && (ptr[1] != '9')) { + hex = ptr[1]; + + if (dohex + && ((hex == 'X') || (hex == 'x')) + && vim_isxdigit(ptr[2])) { + // hexadecimal + ptr += 2; + } else { + // default is decimal + hex = 0; + + if (dooct) { + // Don't interpret "0", "08" or "0129" as octal. + for (n = 1; VIM_ISDIGIT(ptr[n]); ++n) { + if (ptr[n] > '7') { + // can't be octal + hex = 0; + break; + } + + if (ptr[n] >= '0') { + // assume octal + hex = '0'; + } + } + } + } + } + + // Do the string-to-numeric conversion "manually" to avoid sscanf quirks. + if ((hex == '0') || (dooct > 1)) { + // octal + while ('0' <= *ptr && *ptr <= '7') { + un = 8 * un + (unsigned long)(*ptr - '0'); + ptr++; + } + } else if ((hex != 0) || (dohex > 1)) { + // hex + while (vim_isxdigit(*ptr)) { + un = 16 * un + (unsigned long)hex2nr(*ptr); + ptr++; + } + } else { + // decimal + while (VIM_ISDIGIT(*ptr)) { + un = 10 * un + (unsigned long)(*ptr - '0'); + ptr++; + } + } + + if (hexp != NULL) { + *hexp = hex; + } + + if (len != NULL) { + *len = (int)(ptr - start); + } + + if (nptr != NULL) { + if (negative) { + // account for leading '-' for decimal numbers + *nptr = -(long)un; + } else { + *nptr = (long)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'. +/// +/// @param c +/// +/// @return The value of the hex character. +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(FEAT_WINDOWS)) \ + || defined(PROTO) + +/// Convert two hex characters to a byte. +/// Return -1 if one of the characters is not hex. +/// +/// @param p +/// +/// @return The two hex characters converted to a byte or -1 if one of the +/// character 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 // if defined(FEAT_TERMRESPONSE) || (defined(FEAT_GUI_GTK) + // && defined(FEAT_WINDOWS)) || defined(PROTO) + +/// Return TRUE if "str" starts with a backslash that should be removed. +/// For WIN32 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. +/// +/// @param str +/// +/// @return TRUE if `str` starts with a backslash that should be removed. +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 // ifdef BACKSLASH_IN_FILENAME + return str[0] == '\\' && str[1] != NUL; +#endif // ifdef BACKSLASH_IN_FILENAME +} + +/// Halve the number of backslashes in a file name argument. +/// +/// @param p +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. +/// +/// @param p +/// +/// @return String with the number of backslashes halved. +char_u* backslash_halve_save(char_u *p) +{ + char_u *res = vim_strsave(p); + if (res == NULL) { + return p; + } + backslash_halve(res); + return res; +} |