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swift.c
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swift.c
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/*
* Swift mode for QEmacs.
*
* Copyright (c) 2002-2017 Charlie Gordon.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define R(a, b) a, b
#define S(a) a, a
#define E() 0x110000, 0
static int const swift_identifier_head[] = {
R('A', 'Z'), R('a', 'z'),
S(0x00A8), S(0x00AA), S(0x00AD), S(0x00AF),
R(0x00B2, 0x00B5), R(0x00B7, 0x00BA),
R(0x00BC, 0x00BE), R(0x00C0, 0x00D6),
R(0x00D8, 0x00F6), R(0x00F8, 0x00FF),
R(0x0100, 0x02FF), R(0x0370, 0x167F),
R(0x1681, 0x180D), R(0x180F, 0x1DBF),
R(0x1E00, 0x1FFF), R(0x200B, 0x200D),
R(0x202A, 0x202E), R(0x203F, 0x2040),
S(0x2054), R(0x2060, 0x206F),
R(0x2070, 0x20CF), R(0x2100, 0x218F),
R(0x2460, 0x24FF), R(0x2776, 0x2793),
R(0x2C00, 0x2DFF), R(0x2E80, 0x2FFF),
R(0x3004, 0x3007), R(0x3021, 0x302F),
R(0x3031, 0x303F), R(0x3040, 0xD7FF),
R(0xF900, 0xFD3D), R(0xFD40, 0xFDCF),
R(0xFDF0, 0xFE1F), R(0xFE30, 0xFE44),
R(0xFE47, 0xFFFD), R(0x10000, 0x1FFFD),
R(0x20000, 0x2FFFD), R(0x30000, 0x3FFFD),
R(0x40000, 0x4FFFD), R(0x50000, 0x5FFFD),
R(0x60000, 0x6FFFD), R(0x70000, 0x7FFFD),
R(0x80000, 0x8FFFD), R(0x90000, 0x9FFFD),
R(0xA0000, 0xAFFFD), R(0xB0000, 0xBFFFD),
R(0xC0000, 0xCFFFD), R(0xD0000, 0xDFFFD),
R(0xE0000, 0xEFFFD), E(),
};
static int const swift_identifier_other_chars[] = {
R(0x0300, 0x036F), R(0x1DC0, 0x1DFF),
R(0x20D0, 0x20FF), R(0xFE20, 0xFE2F),
E(),
};
#undef R
#undef S
#undef E
static int qe_find_range(int c, const int *rangep)
{
if (c > 0x10FFFF)
return 0;
for (;;) {
if (c < *rangep++)
return 0;
if (c <= *rangep++)
return 1;
}
}
static int is_swift_identifier_head(int c)
{
return qe_find_range(c, swift_identifier_head);
}
static int is_swift_identifier_char(int c)
{
if (qe_isalnum_(c)) {
return 1;
} else {
return qe_find_range(c, swift_identifier_head)
|| qe_find_range(c, swift_identifier_other_chars);
}
}
static int swift_parse_identifier(char *buf, int buf_size, unsigned int *p)
{
buf_t outbuf, *out;
int i = 0;
out = buf_init(&outbuf, buf, buf_size);
buf_putc_utf8(out, p[i++]);
for (; is_swift_identifier_char(p[i]); i++) {
buf_putc_utf8(out, p[i]);
}
if (p[i] == '`' && buf[0] == '`')
buf_put_byte(out, p[i++]);
return i;
}
static int swift_parse_number(unsigned int *p)
{
int i = 0, j;
if (*p == '0') {
if (p[1] == 'b') {
if (qe_isbindigit(p[2])) {
for (i = 3; qe_isbindigit_(p[i]); i++)
continue;
return i;
}
return 1;
} else
if (p[1] == 'o') {
if (qe_isoctdigit(p[2])) {
for (i = 3; qe_isoctdigit_(p[i]); i++)
continue;
return i;
}
return 1;
} else
if (p[1] == 'x') {
if (qe_isxdigit(p[2])) {
for (i = 3; qe_isxdigit_(p[i]); i++)
continue;
if (p[i] == '.' && qe_isxdigit(p[i + 1])) {
for (i += 2; qe_isxdigit_(p[i]); i++)
continue;
}
if (p[i] == 'p' || p[i] == 'P') {
j = i + 1;
if (p[j] == '-' || p[j] == '+')
j++;
/* There is a bug in the Swift Programming Language
* book, page 665:
* hexadecimal-exponent ->
* floating-point-p sign(opt) hexadecimal-literal
* should be decimal-literal instead
*/
if (qe_isdigit(p[j])) {
for (i = j + 1; qe_isdigit_(p[i]); i++)
continue;
}
}
return i;
}
return 1;
}
}
if (qe_isdigit(p[0])) {
for (i = 1; qe_isdigit_(p[i]); i++)
continue;
/* floats require digits before and after . */
if (p[i] == '.' && qe_isdigit(p[i + 1])) {
for (i += 2; qe_isdigit_(p[i]); i++)
continue;
}
if (p[i] == 'e' || p[i] == 'E') {
j = i + 1;
if (p[j] == '-' || p[j] == '+')
j++;
if (qe_isdigit(p[j])) {
for (i = j + 1; qe_isdigit_(p[i]); i++)
continue;
}
}
return i;
}
return 0;
}
static void swift_colorize_line(QEColorizeContext *cp,
unsigned int *str, int n, ModeDef *syn)
{
int i = 0, start = 0, c, style, klen, level;
int state = cp->colorize_state;
char kbuf[64];
if (state) {
/* if already in a state, go directly in the code parsing it */
if (state & IN_C_COMMENT_D)
goto parse_comment_d;
}
style = 0;
while (i < n) {
start = i;
c = str[i++];
switch (c) {
case '/':
if (str[i] == '*') {
/* Swift multi-line comments can nest */
i++;
state |= (1 << IN_C_COMMENT_D_SHIFT);
parse_comment_d:
level = (state & IN_C_COMMENT_D) >> IN_C_COMMENT_D_SHIFT;
while (i < n) {
if (str[i] == '/' && str[i + 1] == '*') {
i += 2;
level++;
} else
if (str[i] == '*' && str[i + 1] == '/') {
i += 2;
level--;
if (level == 0) {
state &= ~IN_C_COMMENT_D;
break;
}
} else {
i++;
}
}
state = (state & ~IN_C_COMMENT_D) |
(min(level, 7) << IN_C_COMMENT_D_SHIFT);
if (level) {
/* set style on eol char to allow skip block from
* end of comment line.
*/
i++;
}
style = C_STYLE_COMMENT;
break;
}
if (str[i] == '/') {
/* end of line comment (include eol char, see above) */
i = n + 1;
style = C_STYLE_COMMENT;
break;
}
continue;
case '`': /* `symbol` for reserved words */
case '@': /* @attribute */
goto identifier;
case '\"': /* string literal */
while (i < n) {
c = str[i++];
if (c == '\\') {
/* Should colorize \(expr) interpolation */
if (i >= n)
break;
i++;
} else
if (c == '\"') {
break;
}
}
style = C_STYLE_STRING;
break;
default:
if (qe_isdigit(c)) {
i -= 1;
i += swift_parse_number(str + i);
style = C_STYLE_NUMBER;
break;
}
if (is_swift_identifier_head(c)) {
identifier:
klen = swift_parse_identifier(kbuf, countof(kbuf), str + start);
i = start + klen;
if (strfind(syn->keywords, kbuf)) {
style = C_STYLE_KEYWORD;
break;
}
if (strfind(syn->types, kbuf)) {
style = C_STYLE_TYPE;
if (check_fcall(str, i)) {
/* function style cast */
style = C_STYLE_KEYWORD;
}
break;
}
if (check_fcall(str, i)) {
style = C_STYLE_FUNCTION;
break;
}
continue;
}
continue;
}
if (style) {
SET_COLOR(str, start, i, style);
style = 0;
}
}
cp->colorize_state = state;
}
static const char swift_keywords[] = {
"var|let|for|in|do|while|if|else|switch|nil|case|default|where|func|"
"return|class|override|self|super|init|deinit|get|set|willSet|didSet|"
"enum|struct|protocol|mutating|extension|typealias|true|false|_|"
"break|continue|fallthrough|inout|static|subscript|convenience|"
"weak|unowned|is|as|import|dynamicType|new|nonmutating|associativity|"
"safe|unsafe|precedence|"
"@lazy|@final|@objc|@optional|@infix|@prefix|@postfix|@assignment|"
"@auto_closure|@required|@noreturn|@class_protocol|@exported|"
"@NSCopying|@NSManaged|"
"operator|infix|prefix|postfix|"
"__COLUMN__|__FILE__|__FUNCTION__|__LINE__|"
};
static const char swift_types[] = {
"Bool|Int|Uint|Float|Double|Character|String|Array|Dictionary|"
"Int8|Int16|Int32|Int64|UInt8|UInt16|UInt32|UInt64|Void|"
"Any|AnyObject|Self|Type|"
"CBool|CChar|CUnsignedChar|CShort|CUnsignedShort|CInt|CUnsignedInt|"
"CLong|CUnsignedLong|CLongLong|CUnsignedLongLong|CWideChar|CChar16|"
"CChar32|CFloat|CDouble|"
};
static ModeDef swift_mode = {
.name = "Swift",
.extensions = "swift",
.shell_handlers = "swift",
.colorize_func = swift_colorize_line,
.colorize_flags = CLANG_SWIFT,
.keywords = swift_keywords,
.types = swift_types,
.fallback = &c_mode,
};
static int swift_init(void)
{
qe_register_mode(&swift_mode, MODEF_SYNTAX);
return 0;
}