diff options
author | Bram Moolenaar <Bram@vim.org> | 2019-10-09 22:53:08 +0200 |
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committer | Bram Moolenaar <Bram@vim.org> | 2019-10-09 22:53:08 +0200 |
commit | 14c01f83487d5c53192297a710eda2b8a4ab17c9 (patch) | |
tree | d5c5e8d42ab13b257fd2e17fd7530511a766ba8a /src/cindent.c | |
parent | 6bd1d7706766a7899904163e8fd55ea117fb1953 (diff) |
patch 8.1.2127: the indent.c file is a bit bigv8.1.2127
Problem: The indent.c file is a bit big.
Solution: Move C-indent code a a new cindent.c file. Move other
indent-related code to indent.c. (Yegappan Lakshmanan,
closes #5031)
Diffstat (limited to 'src/cindent.c')
-rw-r--r-- | src/cindent.c | 4133 |
1 files changed, 4133 insertions, 0 deletions
diff --git a/src/cindent.c b/src/cindent.c new file mode 100644 index 0000000000..dd416720a9 --- /dev/null +++ b/src/cindent.c @@ -0,0 +1,4133 @@ +/* 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. + */ + +/* + * cindent.c: C indentation related functions + * + * Many of C-indenting functions originally come from Eric Fischer. + * + * Below "XXX" means that this function may unlock the current line. + */ + +#include "vim.h" + +// values for the "lookfor" state +#define LOOKFOR_INITIAL 0 +#define LOOKFOR_IF 1 +#define LOOKFOR_DO 2 +#define LOOKFOR_CASE 3 +#define LOOKFOR_ANY 4 +#define LOOKFOR_TERM 5 +#define LOOKFOR_UNTERM 6 +#define LOOKFOR_SCOPEDECL 7 +#define LOOKFOR_NOBREAK 8 +#define LOOKFOR_CPP_BASECLASS 9 +#define LOOKFOR_ENUM_OR_INIT 10 +#define LOOKFOR_JS_KEY 11 +#define LOOKFOR_COMMA 12 + +#if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT) +/* + * Return TRUE if the string "line" starts with a word from 'cinwords'. + */ + int +cin_is_cinword(char_u *line) +{ + char_u *cinw; + char_u *cinw_buf; + int cinw_len; + int retval = FALSE; + int len; + + cinw_len = (int)STRLEN(curbuf->b_p_cinw) + 1; + cinw_buf = alloc(cinw_len); + if (cinw_buf != NULL) + { + line = skipwhite(line); + for (cinw = curbuf->b_p_cinw; *cinw; ) + { + len = copy_option_part(&cinw, cinw_buf, cinw_len, ","); + if (STRNCMP(line, cinw_buf, len) == 0 + && (!vim_iswordc(line[len]) || !vim_iswordc(line[len - 1]))) + { + retval = TRUE; + break; + } + } + vim_free(cinw_buf); + } + return retval; +} +#endif + +#if defined(FEAT_CINDENT) || defined(FEAT_SYN_HL) + +/* + * Skip to the end of a "string" and a 'c' character. + * If there is no string or character, return argument unmodified. + */ + static char_u * +skip_string(char_u *p) +{ + int i; + + // We loop, because strings may be concatenated: "date""time". + for ( ; ; ++p) + { + if (p[0] == '\'') // 'c' or '\n' or '\000' + { + if (!p[1]) // ' at end of line + break; + i = 2; + if (p[1] == '\\') // '\n' or '\000' + { + ++i; + while (vim_isdigit(p[i - 1])) // '\000' + ++i; + } + if (p[i] == '\'') // check for trailing ' + { + p += i; + continue; + } + } + else if (p[0] == '"') // start of string + { + for (++p; p[0]; ++p) + { + if (p[0] == '\\' && p[1] != NUL) + ++p; + else if (p[0] == '"') // end of string + break; + } + if (p[0] == '"') + continue; // continue for another string + } + else if (p[0] == 'R' && p[1] == '"') + { + // Raw string: R"[delim](...)[delim]" + char_u *delim = p + 2; + char_u *paren = vim_strchr(delim, '('); + + if (paren != NULL) + { + size_t delim_len = paren - delim; + + for (p += 3; *p; ++p) + if (p[0] == ')' && STRNCMP(p + 1, delim, delim_len) == 0 + && p[delim_len + 1] == '"') + { + p += delim_len + 1; + break; + } + if (p[0] == '"') + continue; // continue for another string + } + } + break; // no string found + } + if (!*p) + --p; // backup from NUL + return p; +} + +/* + * Find the start of a comment, not knowing if we are in a comment right now. + * Search starts at w_cursor.lnum and goes backwards. + * Return NULL when not inside a comment. + */ + static pos_T * +ind_find_start_comment(void) // XXX +{ + return find_start_comment(curbuf->b_ind_maxcomment); +} + + pos_T * +find_start_comment(int ind_maxcomment) // XXX +{ + pos_T *pos; + char_u *line; + char_u *p; + int cur_maxcomment = ind_maxcomment; + + for (;;) + { + pos = findmatchlimit(NULL, '*', FM_BACKWARD, cur_maxcomment); + if (pos == NULL) + break; + + // Check if the comment start we found is inside a string. + // If it is then restrict the search to below this line and try again. + line = ml_get(pos->lnum); + for (p = line; *p && (colnr_T)(p - line) < pos->col; ++p) + p = skip_string(p); + if ((colnr_T)(p - line) <= pos->col) + break; + cur_maxcomment = curwin->w_cursor.lnum - pos->lnum - 1; + if (cur_maxcomment <= 0) + { + pos = NULL; + break; + } + } + return pos; +} + +/* + * Find the start of a raw string, not knowing if we are in one right now. + * Search starts at w_cursor.lnum and goes backwards. + * Return NULL when not inside a raw string. + */ + static pos_T * +find_start_rawstring(int ind_maxcomment) // XXX +{ + pos_T *pos; + char_u *line; + char_u *p; + int cur_maxcomment = ind_maxcomment; + + for (;;) + { + pos = findmatchlimit(NULL, 'R', FM_BACKWARD, cur_maxcomment); + if (pos == NULL) + break; + + // Check if the raw string start we found is inside a string. + // If it is then restrict the search to below this line and try again. + line = ml_get(pos->lnum); + for (p = line; *p && (colnr_T)(p - line) < pos->col; ++p) + p = skip_string(p); + if ((colnr_T)(p - line) <= pos->col) + break; + cur_maxcomment = curwin->w_cursor.lnum - pos->lnum - 1; + if (cur_maxcomment <= 0) + { + pos = NULL; + break; + } + } + return pos; +} + +/* + * Find the start of a comment or raw string, not knowing if we are in a + * comment or raw string right now. + * Search starts at w_cursor.lnum and goes backwards. + * If is_raw is given and returns start of raw_string, sets it to true. + * Return NULL when not inside a comment or raw string. + * "CORS" -> Comment Or Raw String + */ + static pos_T * +ind_find_start_CORS(linenr_T *is_raw) // XXX +{ + static pos_T comment_pos_copy; + pos_T *comment_pos; + pos_T *rs_pos; + + comment_pos = find_start_comment(curbuf->b_ind_maxcomment); + if (comment_pos != NULL) + { + // Need to make a copy of the static pos in findmatchlimit(), + // calling find_start_rawstring() may change it. + comment_pos_copy = *comment_pos; + comment_pos = &comment_pos_copy; + } + rs_pos = find_start_rawstring(curbuf->b_ind_maxcomment); + + // If comment_pos is before rs_pos the raw string is inside the comment. + // If rs_pos is before comment_pos the comment is inside the raw string. + if (comment_pos == NULL || (rs_pos != NULL + && LT_POS(*rs_pos, *comment_pos))) + { + if (is_raw != NULL && rs_pos != NULL) + *is_raw = rs_pos->lnum; + return rs_pos; + } + return comment_pos; +} +#endif // FEAT_CINDENT || FEAT_SYN_HL + +#if defined(FEAT_CINDENT) || defined(PROTO) + +/* + * Return TRUE if C-indenting is on. + */ + int +cindent_on(void) +{ + return (!p_paste && (curbuf->b_p_cin +# ifdef FEAT_EVAL + || *curbuf->b_p_inde != NUL +# endif + )); +} + +// Find result cache for cpp_baseclass +typedef struct { + int found; + lpos_T lpos; +} cpp_baseclass_cache_T; + +/* + * Skip over white space and C comments within the line. + * Also skip over Perl/shell comments if desired. + */ + static char_u * +cin_skipcomment(char_u *s) +{ + while (*s) + { + char_u *prev_s = s; + + s = skipwhite(s); + + // Perl/shell # comment comment continues until eol. Require a space + // before # to avoid recognizing $#array. + if (curbuf->b_ind_hash_comment != 0 && s != prev_s && *s == '#') + { + s += STRLEN(s); + break; + } + if (*s != '/') + break; + ++s; + if (*s == '/') // slash-slash comment continues till eol + { + s += STRLEN(s); + break; + } + if (*s != '*') + break; + for (++s; *s; ++s) // skip slash-star comment + if (s[0] == '*' && s[1] == '/') + { + s += 2; + break; + } + } + return s; +} + +/* + * Return TRUE if there is no code at *s. White space and comments are + * not considered code. + */ + static int +cin_nocode(char_u *s) +{ + return *cin_skipcomment(s) == NUL; +} + +/* + * Recognize the start of a C or C++ comment. + */ + static int +cin_iscomment(char_u *p) +{ + return (p[0] == '/' && (p[1] == '*' || p[1] == '/')); +} + +/* + * Recognize the start of a "//" comment. + */ + static int +cin_islinecomment(char_u *p) +{ + return (p[0] == '/' && p[1] == '/'); +} + +/* + * Check previous lines for a "//" line comment, skipping over blank lines. + */ + static pos_T * +find_line_comment(void) // XXX +{ + static pos_T pos; + char_u *line; + char_u *p; + + pos = curwin->w_cursor; + while (--pos.lnum > 0) + { + line = ml_get(pos.lnum); + p = skipwhite(line); + if (cin_islinecomment(p)) + { + pos.col = (int)(p - line); + return &pos; + } + if (*p != NUL) + break; + } + return NULL; +} + +/* + * Return TRUE if "text" starts with "key:". + */ + static int +cin_has_js_key(char_u *text) +{ + char_u *s = skipwhite(text); + int quote = -1; + + if (*s == '\'' || *s == '"') + { + // can be 'key': or "key": + quote = *s; + ++s; + } + if (!vim_isIDc(*s)) // need at least one ID character + return FALSE; + + while (vim_isIDc(*s)) + ++s; + if (*s == quote) + ++s; + + s = cin_skipcomment(s); + + // "::" is not a label, it's C++ + return (*s == ':' && s[1] != ':'); +} + +/* + * Check if string matches "label:"; move to character after ':' if true. + * "*s" must point to the start of the label, if there is one. + */ + static int +cin_islabel_skip(char_u **s) +{ + if (!vim_isIDc(**s)) // need at least one ID character + return FALSE; + + while (vim_isIDc(**s)) + (*s)++; + + *s = cin_skipcomment(*s); + + // "::" is not a label, it's C++ + return (**s == ':' && *++*s != ':'); +} + +/* + * Recognize a "public/private/protected" scope declaration label. + */ + static int +cin_isscopedecl(char_u *s) +{ + int i; + + s = cin_skipcomment(s); + if (STRNCMP(s, "public", 6) == 0) + i = 6; + else if (STRNCMP(s, "protected", 9) == 0) + i = 9; + else if (STRNCMP(s, "private", 7) == 0) + i = 7; + else + return FALSE; + return (*(s = cin_skipcomment(s + i)) == ':' && s[1] != ':'); +} + +/* + * Recognize a preprocessor statement: Any line that starts with '#'. + */ + static int +cin_ispreproc(char_u *s) +{ + if (*skipwhite(s) == '#') + return TRUE; + return FALSE; +} + +/* + * Return TRUE if line "*pp" at "*lnump" is a preprocessor statement or a + * continuation line of a preprocessor statement. Decrease "*lnump" to the + * start and return the line in "*pp". + * Put the amount of indent in "*amount". + */ + static int +cin_ispreproc_cont(char_u **pp, linenr_T *lnump, int *amount) +{ + char_u *line = *pp; + linenr_T lnum = *lnump; + int retval = FALSE; + int candidate_amount = *amount; + + if (*line != NUL && line[STRLEN(line) - 1] == '\\') + candidate_amount = get_indent_lnum(lnum); + + for (;;) + { + if (cin_ispreproc(line)) + { + retval = TRUE; + *lnump = lnum; + break; + } + if (lnum == 1) + break; + line = ml_get(--lnum); + if (*line == NUL || line[STRLEN(line) - 1] != '\\') + break; + } + + if (lnum != *lnump) + *pp = ml_get(*lnump); + if (retval) + *amount = candidate_amount; + return retval; +} + + static int +cin_iselse( + char_u *p) +{ + if (*p == '}') // accept "} else" + p = cin_skipcomment(p + 1); + return (STRNCMP(p, "else", 4) == 0 && !vim_isIDc(p[4])); +} + +/* + * Recognize a line that starts with '{' or '}', or ends with ';', ',', '{' or + * '}'. + * Don't consider "} else" a terminated line. + * If a line begins with an "else", only consider it terminated if no unmatched + * opening braces follow (handle "else { foo();" correctly). + * Return the character terminating the line (ending char's have precedence if + * both apply in order to determine initializations). + */ + static int +cin_isterminated( + char_u *s, + int incl_open, // include '{' at the end as terminator + int incl_comma) // recognize a trailing comma +{ + char_u found_start = 0; + unsigned n_open = 0; + int is_else = FALSE; + + s = cin_skipcomment(s); + + if (*s == '{' || (*s == '}' && !cin_iselse(s))) + found_start = *s; + + if (!found_start) + is_else = cin_iselse(s); + + while (*s) + { + // skip over comments, "" strings and 'c'haracters + s = skip_string(cin_skipcomment(s)); + if (*s == '}' && n_open > 0) + --n_open; + if ((!is_else || n_open == 0) + && (*s == ';' || *s == '}' || (incl_comma && *s == ',')) + && cin_nocode(s + 1)) + return *s; + else if (*s == '{') + { + if (incl_open && cin_nocode(s + 1)) + return *s; + else + ++n_open; + } + + if (*s) + s++; + } + return found_start; +} + +/* + * Return TRUE when "s" starts with "word" and then a non-ID character. + */ + static int +cin_starts_with(char_u *s, char *word) +{ + int l = (int)STRLEN(word); + + return (STRNCMP(s, word, l) == 0 && !vim_isIDc(s[l])); +} + +/* + * Recognize a "default" switch label. + */ + static int +cin_isdefault(char_u *s) +{ + return (STRNCMP(s, "default", 7) == 0 + && *(s = cin_skipcomment(s + 7)) == ':' + && s[1] != ':'); +} + +/* + * Recognize a switch label: "case .*:" or "default:". + */ + static int +cin_iscase( + char_u *s, + int strict) // Allow relaxed check of case statement for JS +{ + s = cin_skipcomment(s); + if (cin_starts_with(s, "case")) + { + for (s += 4; *s; ++s) + { + s = cin_skipcomment(s); + if (*s == ':') + { + if (s[1] == ':') // skip over "::" for C++ + ++s; + else + return TRUE; + } + if (*s == '\'' && s[1] && s[2] == '\'') + s += 2; // skip over ':' + else if (*s == '/' && (s[1] == '*' || s[1] == '/')) + return FALSE; // stop at comment + else if (*s == '"') + { + // JS etc. + if (strict) + return FALSE; // stop at string + else + return TRUE; + } + } + return FALSE; + } + + if (cin_isdefault(s)) + return TRUE; + return FALSE; +} + +/* + * Recognize a label: "label:". + * Note: curwin->w_cursor must be where we are looking for the label. + */ + static int +cin_islabel(void) // XXX +{ + char_u *s; + + s = cin_skipcomment(ml_get_curline()); + + // Exclude "default" from labels, since it should be indented + // like a switch label. Same for C++ scope declarations. + if (cin_isdefault(s)) + return FALSE; + if (cin_isscopedecl(s)) + return FALSE; + + if (cin_islabel_skip(&s)) + { + // Only accept a label if the previous line is terminated or is a case + // label. + pos_T cursor_save; + pos_T *trypos; + char_u *line; + + cursor_save = curwin->w_cursor; + while (curwin->w_cursor.lnum > 1) + { + --curwin->w_cursor.lnum; + + // If we're in a comment or raw string now, skip to the start of + // it. + curwin->w_cursor.col = 0; + if ((trypos = ind_find_start_CORS(NULL)) != NULL) // XXX + curwin->w_cursor = *trypos; + + line = ml_get_curline(); + if (cin_ispreproc(line)) // ignore #defines, #if, etc. + continue; + if (*(line = cin_skipcomment(line)) == NUL) + continue; + + curwin->w_cursor = cursor_save; + if (cin_isterminated(line, TRUE, FALSE) + || cin_isscopedecl(line) + || cin_iscase(line, TRUE) + || (cin_islabel_skip(&line) && cin_nocode(line))) + return TRUE; + return FALSE; + } + curwin->w_cursor = cursor_save; + return TRUE; // label at start of file??? + } + return FALSE; +} + +/* + * Return TRUE if string "s" ends with the string "find", possibly followed by + * white space and comments. Skip strings and comments. + * Ignore "ignore" after "find" if it's not NULL. + */ + static int +cin_ends_in(char_u *s, char_u *find, char_u *ignore) +{ + char_u *p = s; + char_u *r; + int len = (int)STRLEN(find); + + while (*p != NUL) + { + p = cin_skipcomment(p); + if (STRNCMP(p, find, len) == 0) + { + r = skipwhite(p + len); + if (ignore != NULL && STRNCMP(r, ignore, STRLEN(ignore)) == 0) + r = skipwhite(r + STRLEN(ignore)); + if (cin_nocode(r)) + return TRUE; + } + if (*p != NUL) + ++p; + } + return FALSE; +} + +/* + * Recognize structure initialization and enumerations: + * "[typedef] [static|public|protected|private] enum" + * "[typedef] [static|public|protected|private] = {" + */ + static int +cin_isinit(void) +{ + char_u *s; + static char *skip[] = {"static", "public", "protected", "private"}; + + s = cin_skipcomment(ml_get_curline()); + + if (cin_starts_with(s, "typedef")) + s = cin_skipcomment(s + 7); + + for (;;) + { + int i, l; + + for (i = 0; i < (int)(sizeof(skip) / sizeof(char *)); ++i) + { + l = (int)strlen(skip[i]); + if (cin_starts_with(s, skip[i])) + { + s = cin_skipcomment(s + l); + l = 0; + break; + } + } + if (l != 0) + break; + } + + if (cin_starts_with(s, "enum")) + return TRUE; + + if (cin_ends_in(s, (char_u *)"=", (char_u *)"{")) + return TRUE; + + return FALSE; +} + +// Maximum number of lines to search back for a "namespace" line. +#define FIND_NAMESPACE_LIM 20 + +/* + * Recognize a "namespace" scope declaration. + */ + static int +cin_is_cpp_namespace(char_u *s) +{ + char_u *p; + int has_name = FALSE; + int has_name_start = FALSE; + + s = cin_skipcomment(s); + if (STRNCMP(s, "namespace", 9) == 0 && (s[9] == NUL || !vim_iswordc(s[9]))) + { + p = cin_skipcomment(skipwhite(s + 9)); + while (*p != NUL) + { + if (VIM_ISWHITE(*p)) + { + has_name = TRUE; // found end of a name + p = cin_skipcomment(skipwhite(p)); + } + else if (*p == '{') + { + break; + } + else if (vim_iswordc(*p)) + { + has_name_start = TRUE; + if (has_name) + return FALSE; // word character after skipping past name + ++p; + } + else if (p[0] == ':' && p[1] == ':' && vim_iswordc(p[2])) + { + if (!has_name_start || has_name) + return FALSE; + // C++ 17 nested namespace + p += 3; + } + else + { + return FALSE; + } + } + return TRUE; + } + return FALSE; +} + +/* + * Recognize a `extern "C"` or `extern "C++"` linkage specifications. + */ + static int +cin_is_cpp_extern_c(char_u *s) +{ + char_u *p; + int has_string_literal = FALSE; + + s = cin_skipcomment(s); + if (STRNCMP(s, "extern", 6) == 0 && (s[6] == NUL || !vim_iswordc(s[6]))) + { + p = cin_skipcomment(skipwhite(s + 6)); + while (*p != NUL) + { + if (VIM_ISWHITE(*p)) + { + p = cin_skipcomment(skipwhite(p)); + } + else if (*p == '{') + { + break; + } + else if (p[0] == '"' && p[1] == 'C' && p[2] == '"') + { + if (has_string_literal) + return FALSE; + has_string_literal = TRUE; + p += 3; + } + else if (p[0] == '"' && p[1] == 'C' && p[2] == '+' && p[3] == '+' + && p[4] == '"') + { + if (has_string_literal) + return FALSE; + has_string_literal = TRUE; + p += 5; + } + else + { + return FALSE; + } + } + return has_string_literal ? TRUE : FALSE; + } + return FALSE; +} + +/* + * Return a pointer to the first non-empty non-comment character after a ':'. + * Return NULL if not found. + * case 234: a = b; + * ^ + */ + static char_u * +after_label(char_u *l) +{ + for ( ; *l; ++l) + { + if (*l == ':') + { + if (l[1] == ':') // skip over "::" for C++ + ++l; + else if (!cin_iscase(l + 1, FALSE)) + break; + } + else if (*l == '\'' && l[1] && l[2] == '\'') + l += 2; // skip over 'x' + } + if (*l == NUL) + return NULL; + l = cin_skipcomment(l + 1); + if (*l == NUL) + return NULL; + return l; +} + +/* + * Get indent of line "lnum", skipping a label. + * Return 0 if there is nothing after the label. + */ + static int +get_indent_nolabel (linenr_T lnum) // XXX +{ + char_u *l; + pos_T fp; + colnr_T col; + char_u *p; + + l = ml_get(lnum); + p = after_label(l); + if (p == NULL) + return 0; + + fp.col = (colnr_T)(p - l); + fp.lnum = lnum; + getvcol(curwin, &fp, &col, NULL, NULL); + return (int)col; +} + +/* + * Find indent for line "lnum", ignoring any case or jump label. + * Also return a pointer to the text (after the label) in "pp". + * label: if (asdf && asdfasdf) + * ^ + */ + static int +skip_label(linenr_T lnum, char_u **pp) +{ + char_u *l; + int amount; + pos_T cursor_save; + + cursor_save = curwin->w_cursor; + curwin->w_cursor.lnum = lnum; + l = ml_get_curline(); + // XXX + if (cin_iscase(l, FALSE) || cin_isscopedecl(l) || cin_islabel()) + { + amount = get_indent_nolabel(lnum); + l = after_label(ml_get_curline()); + if (l == NULL) // just in case + l = ml_get_curline(); + } + else + { + amount = get_indent(); + l = ml_get_curline(); + } + *pp = l; + + curwin->w_cursor = cursor_save; + return amount; +} + +/* + * Return the indent of the first variable name after a type in a declaration. + * int a, indent of "a" + * static struct foo b, indent of "b" + * enum bla c, indent of "c" + * Returns zero when it doesn't look like a declaration. + */ + static int +cin_first_id_amount(void) +{ + char_u *line, *p, *s; + int len; + pos_T fp; + colnr_T col; + + line = ml_get_curline(); + p = skipwhite(line); + len = (int)(skiptowhite(p) - p); + if (len == 6 && STRNCMP(p, "static", 6) == 0) + { + p = skipwhite(p + 6); + len = (int)(skiptowhite(p) - p); + } + if (len == 6 && STRNCMP(p, "struct", 6) == 0) + p = skipwhite(p + 6); + else if (len == 4 && STRNCMP(p, "enum", 4) == 0) + p = skipwhite(p + 4); + else if ((len == 8 && STRNCMP(p, "unsigned", 8) == 0) + || (len == 6 && STRNCMP(p, "signed", 6) == 0)) + { + s = skipwhite(p + len); + if ((STRNCMP(s, "int", 3) == 0 && VIM_ISWHITE(s[3])) + || (STRNCMP(s, "long", 4) == 0 && VIM_ISWHITE(s[4])) + || (STRNCMP(s, "short", 5) == 0 && VIM_ISWHITE(s[5])) + || (STRNCMP(s, "char", 4) == 0 && VIM_ISWHITE(s[4]))) + p = s; + } + for (len = 0; vim_isIDc(p[len]); ++len) + ; + if (len == 0 || !VIM_ISWHITE(p[len]) || cin_nocode(p)) + return 0; + + p = skipwhite(p + len); + fp.lnum = curwin->w_cursor.lnum; + fp.col = (colnr_T)(p - line); + getvcol(curwin, &fp, &col, NULL, NULL); + return (int)col; +} + +/* + * Return the indent of the first non-blank after an equal sign. + * char *foo = "here"; + * Return zero if no (useful) equal sign found. + * Return -1 if the line above "lnum" ends in a backslash. + * foo = "asdf\ + * asdf\ + * here"; + */ + static int +cin_get_equal_amount(linenr_T lnum) +{ + char_u *line; + char_u *s; + colnr_T col; + pos_T fp; + + if (lnum > 1) + { + line = ml_get(lnum - 1); + if (*line != NUL && line[STRLEN(line) - 1] == '\\') + return -1; + } + + line = s = ml_get(lnum); + while (*s != NUL && vim_strchr((char_u *)"=;{}\"'", *s) == NULL) + { + if (cin_iscomment(s)) // ignore comments + s = cin_skipcomment(s); + else + ++s; + } + if (*s != '=') + return 0; + + s = skipwhite(s + 1); + if (cin_nocode(s)) + return 0; + + if (*s == '"') // nice alignment for continued strings + ++s; + + fp.lnum = lnum; + fp.col = (colnr_T)(s - line); + getvcol(curwin, &fp, &col, NULL, NULL); + return (int)col; +} + +/* + * Skip strings, chars and comments until at or past "trypos". + * Return the column found. + */ + static int +cin_skip2pos(pos_T *trypos) +{ + char_u *line; + char_u *p; + char_u *new_p; + + p = line = ml_get(trypos->lnum); + while (*p && (colnr_T)(p - line) < trypos->col) + { + if (cin_iscomment(p)) + p = cin_skipcomment(p); + else + { + new_p = skip_string(p); + if (new_p == p) + ++p; + else + p = new_p; + } + } + return (int)(p - line); +} + + static pos_T * +find_match_char(int c, int ind_maxparen) // XXX +{ + pos_T cursor_save; + pos_T *trypos; + static pos_T pos_copy; + int ind_maxp_wk; + + cursor_save = curwin->w_cursor; + ind_maxp_wk = ind_maxparen; +retry: + if ((trypos = findmatchlimit(NULL, c, 0, ind_maxp_wk)) != NULL) + { + // check if the ( is in a // comment + if ((colnr_T)cin_skip2pos(trypos) > trypos->col) + { + ind_maxp_wk = ind_maxparen - (int)(cursor_save.lnum - trypos->lnum); + if (ind_maxp_wk > 0) + { + curwin->w_cursor = *trypos; + curwin->w_cursor.col = 0; // XXX + goto retry; + } + trypos = NULL; + } + else + { + pos_T *trypos_wk; + + pos_copy = *trypos; // copy trypos, findmatch will change it + trypos = &pos_copy; + curwin->w_cursor = *trypos; + if ((trypos_wk = ind_find_start_CORS(NULL)) != NULL) // XXX + { + ind_maxp_wk = ind_maxparen - (int)(cursor_save.lnum + - trypos_wk->lnum); + if (ind_maxp_wk > 0) + { + curwin->w_cursor = *trypos_wk; + goto retry; + } + trypos = NULL; + } + } + } + curwin->w_cursor = cursor_save; + return trypos; +} + +/* + * Find the matching '(', ignoring it if it is in a comment. + * Return NULL if no match found. + */ + static pos_T * +find_match_paren(int ind_maxparen) // XXX +{ + return find_match_char('(', ind_maxparen); +} + +/* + * Set w_cursor.col to the column number of the last unmatched ')' or '{' in + * line "l". "l" must point to the start of the line. + */ + static int +find_last_paren(char_u *l, int start, int end) +{ + int i; + int retval = FALSE; + int open_count = 0; + + curwin->w_cursor.col = 0; // default is start of line + + for (i = 0; l[i] != NUL; i++) + { + i = (int)(cin_skipcomment(l + i) - l); // ignore parens in comments + i = (int)(skip_string(l + i) - l); // ignore parens in quotes + if (l[i] == start) + ++open_count; + else if (l[i] == end) + { + if (open_count > 0) + --open_count; + else + { + curwin->w_cursor.col = i; + retval = TRUE; + } + } + } + return retval; +} + +/* + * Recognize the basic picture of a function declaration -- it needs to + * have an open paren somewhere and a close paren at the end of the line and + * no semicolons anywhere. + * When a line ends in a comma we continue looking in the next line. + * "sp" points to a string with the line. When looking at other lines it must + * be restored to the line. When it's NULL fetch lines here. + * "first_lnum" is where we start looking. + * "min_lnum" is the line before which we will not be looking. + */ + static int +cin_isfuncdecl( + char_u **sp, + linenr_T first_lnum, + linenr_T min_lnum) +{ + char_u *s; + linenr_T lnum = first_lnum; + linenr_T save_lnum = curwin->w_cursor.lnum; + int retval = FALSE; + pos_T *trypos; + int just_started = TRUE; + + if (sp == NULL) + s = ml_get(lnum); + else + s = *sp; + + curwin->w_cursor.lnum = lnum; + if (find_last_paren(s, '(', ')') + && (trypos = find_match_paren(curbuf->b_ind_maxparen)) != NULL) + { + lnum = trypos->lnum; + if (lnum < min_lnum) + { + curwin->w_cursor.lnum = save_lnum; + return FALSE; + } + + s = ml_get(lnum); + } + curwin->w_cursor.lnum = save_lnum; + + // Ignore line starting with #. + if (cin_ispreproc(s)) + return FALSE; + + while (*s && *s != '(' && *s != ';' && *s != '\'' && *s != '"') + { + if (cin_iscomment(s)) // ignore comments + s = cin_skipcomment(s); + else if (*s == ':') + { + if (*(s + 1) == ':') + s += 2; + else + // To avoid a mistake in the following situation: + // A::A(int a, int b) + // : a(0) // <--not a function decl + // , b(0) + // {... + return FALSE; + } + else + ++s; + } + if (*s != '(') + return FALSE; // ';', ' or " before any () or no '(' + + while (*s && *s != ';' && *s != '\'' && *s != '"') + { + if (*s == ')' && cin_nocode(s + 1)) + { + // ')' at the end: may have found a match + // Check for he previous line not to end in a backslash: + // #if defined(x) && {backslash} + // defined(y) + lnum = first_lnum - 1; + s = ml_get(lnum); + if (*s == NUL || s[STRLEN(s) - 1] != '\\') + retval = TRUE; + goto done; + } + if ((*s == ',' && cin_nocode(s + 1)) || s[1] == NUL || cin_nocode(s)) + { + int comma = (*s == ','); + + // ',' at the end: continue looking in the next line. + // At the end: check for ',' in the next line, for this style: + // func(arg1 + // , arg2) + for (;;) + { + if (lnum >= curbuf->b_ml.ml_line_count) + break; + s = ml_get(++lnum); + if (!cin_ispreproc(s)) + break; + } + if (lnum >= curbuf->b_ml.ml_line_count) + break; + // Require a comma at end of the line or a comma or ')' at the + // start of next line. + s = skipwhite(s); + if (!just_started && (!comma && *s != ',' && *s != ')')) + break; + just_started = FALSE; + } + else if (cin_iscomment(s)) // ignore comments + s = cin_skipcomment(s); + else + { + ++s; + just_started = FALSE; + } + } + +done: + if (lnum != first_lnum && sp != NULL) + *sp = ml_get(first_lnum); + + return retval; +} + + static int +cin_isif(char_u *p) +{ + return (STRNCMP(p, "if", 2) == 0 && !vim_isIDc(p[2])); +} + + static int +cin_isdo(char_u *p) +{ + return (STRNCMP(p, "do", 2) == 0 && !vim_isIDc(p[2])); +} + +/* + * Check if this is a "while" that should have a matching "do". + * We only accept a "while (con |