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keyword.c
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keyword.c
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/* Copyright 2007, 2008 Peter Klausler. See COPYING for license. */
#include "all.h"
Boolean_t no_keywords;
static const char *C_keyword_list[] = {
"#define", "#elif", "#else", "#endif", "#if", "#ifdef", "#ifndef",
"#include", "#pragma", "#undef",
"asm", "auto", "break", "case", "char", "const", "continue",
"default", "do", "double", "else", "enum", "extern", "float",
"for", "goto", "if", "int", "long", "register", "return",
"short", "signed", "sizeof", "static", "struct", "switch",
"typedef", "union", "unsigned", "void", "volatile", "while"
};
static const char *Cpp_keyword_list[] = {
"#define", "#elif", "#else", "#endif", "#if", "#ifdef", "#ifndef",
"#include", "#pragma", "#undef",
"asm", "auto", "bool", "break", "case", "catch", "char", "class",
"const", "constexpr", "const_cast", "continue", "default", "delete",
"do", "double", "dynamic_cast", "else", "enum", "explicit", "export",
"extern", "false", "final", "float", "for", "friend", "goto", "if",
"inline", "int", "long", "mutable", "namespace", "new", "operator",
"override", "private", "protected",
"public", "register", "reinterpret_cast", "return", "short", "signed",
"sizeof", "static", "static_cast", "struct", "switch", "template",
"this", "throw", "true", "try", "typedef", "typeid", "typename",
"union", "unsigned", "using", "virtual", "void", "volatile",
"wchar_t", "while"
};
static const char *go_keyword_list[] = {
"break", "case", "chan", "const", "continue", "default", "defer",
"else", "fallthrough", "for", "func", "go", "goto", "if", "import",
"interface", "map", "package", "range", "return", "select", "struct",
"switch", "type", "var"
};
static const char *Haskell_keyword_list[] = {
"_", "case", "class", "data", "default", "deriving", "do", "else",
"foreign", "if", "import", "in", "infix", "infixl", "infixr",
"instance", "let", "module", "newtype", "of", "then", "type",
"where"
};
static sposition_t C_comment_start(struct view *view, position_t offset)
{
Unicode_t ch, nch = 0;
int newlines = 0;
while (IS_UNICODE((ch = view_char_prior(view, offset, &offset)))) {
if (ch == '\n') {
if (newlines++ == 100)
break;
} else if (ch == '/') {
if (nch == '*')
return offset;
if (!newlines && nch == '/')
return offset;
} else if (ch == '*' && nch == '/')
break;
nch = ch;
}
return -1;
}
static sposition_t C_comment_end(struct view *view, position_t offset)
{
Unicode_t ch, lch = 0;
position_t next;
if (view_char(view, offset, &offset) != '/')
return -1;
ch = view_char(view, offset, &offset);
if (ch == '/')
return find_line_end(view, offset);
if (ch != '*')
return -1;
while (IS_UNICODE((ch = view_char(view, offset, &next)))) {
if (lch == '*' && ch == '/')
return offset;
lch = ch;
offset = next;
}
return -1;
}
static sposition_t C_string_end(struct view *view, position_t offset)
{
Unicode_t ch, lch = 0, ch0 = view_char(view, offset, &offset);
position_t next;
if (ch0 != '\'' && ch0 != '"')
return -1;
while (IS_UNICODE((ch = view_char(view, offset, &next)))) {
if (ch == ch0 && lch != '\\')
return offset;
if (ch == '\n')
break;
if (ch == '\\' && lch == '\\')
lch = 0;
else
lch = ch;
offset = next;
}
return -1;
}
static sposition_t Haskell_comment_start(struct view *view, position_t offset)
{
Unicode_t ch, nch = 0;
int newlines = 0;
while (IS_UNICODE((ch = view_char_prior(view, offset, &offset)))) {
if (ch == '\n') {
if (newlines++ == 100)
break;
} else if (ch == '{' && nch == '-')
return offset;
else if (ch == '-') {
if (!newlines && nch == '-')
return offset;
if (nch == '}')
break;
}
nch = ch;
}
return -1;
}
static sposition_t Haskell_comment_end(struct view *view, position_t offset)
{
Unicode_t ch, lch = 0;
position_t next;
ch = view_char(view, offset, &offset);
if (ch != '-' && ch != '{')
return -1;
if (view_char(view, offset, &offset) != '-')
return -1;
if (ch == '-')
return find_line_end(view, offset);
while (IS_UNICODE((ch = view_char(view, offset, &next)))) {
if (lch == '-' && ch == '}')
return offset;
lch = ch;
offset = next;
}
return -1;
}
static sposition_t Haskell_string_end(struct view *view, position_t offset)
{
position_t next;
Unicode_t ch, lch = 0, ch0 = view_char(view, offset, &next);
if (ch0 == '\'') {
ch = view_char_prior(view, offset, NULL);
if (isalnum(ch) || ch == '_' || ch == '\'')
return -1;
} else if (ch0 != '"')
return -1;
while (IS_UNICODE((ch = view_char(view, offset = next, &next)))) {
if (ch == ch0 && lch != '\\')
return offset;
if (ch == '\n')
break;
if (ch == '\\' && lch == '\\')
lch = 0;
else
lch = ch;
}
return -1;
}
#define KW(lang) { sizeof lang##_keyword_list / sizeof *lang##_keyword_list, \
lang##_keyword_list }
static struct file_keywords {
const char *suffix;
struct keywords keywords;
const char *brackets;
sposition_t (*comment_start)(struct view *, position_t);
sposition_t (*comment_end)(struct view *, position_t);
sposition_t (*string_end)(struct view *, position_t);
} kwmap [] = {
{ ".c", KW(C), "()[]{}", C_comment_start, C_comment_end, C_string_end },
{ ".C", KW(C), "()[]{}", C_comment_start, C_comment_end, C_string_end },
{ ".cc", KW(Cpp), "()[]{}", C_comment_start, C_comment_end, C_string_end },
{ ".cpp", KW(Cpp), "()[]{}", C_comment_start, C_comment_end, C_string_end },
{ ".cxx", KW(Cpp), "()[]{}", C_comment_start, C_comment_end, C_string_end },
{ ".go", KW(go), "()[]{}", C_comment_start, C_comment_end, C_string_end },
{ ".h", KW(Cpp), "()[]{}", C_comment_start, C_comment_end, C_string_end },
{ ".hs", KW(Haskell), "()[]{}", Haskell_comment_start, Haskell_comment_end,
Haskell_string_end },
{ ".html", { 0, NULL }, "<>" },
{ }
};
void keyword_init(struct text *text)
{
if (text->path) {
size_t pathlen = strlen(text->path);
int j;
for (j = 0; kwmap[j].suffix; j++) {
size_t suffixlen = strlen(kwmap[j].suffix);
if (pathlen > suffixlen &&
!strcmp(text->path + pathlen - suffixlen,
kwmap[j].suffix)) {
text->brackets = kwmap[j].brackets;
if (!no_keywords) {
text->keywords = &kwmap[j].keywords;
text->comment_start = kwmap[j].comment_start;
text->comment_end = kwmap[j].comment_end;
text->string_end = kwmap[j].string_end;
}
return;
}
}
}
text->brackets = "()[]{}";
text->keywords = NULL;
}
Boolean_t is_keyword(struct view *view, position_t offset)
{
unsigned n;
const char **tab;
char *word;
size_t bytes;
if (!view->text->keywords)
return FALSE;
bytes = find_id_end(view, offset) - offset;
if (view_raw(view, &word, offset, bytes) < bytes)
return FALSE;
for (n = view->text->keywords->count,
tab = view->text->keywords->word; n; ) {
unsigned mid = n / 2;
int cmp = strncmp(word, tab[mid], bytes);
if (!cmp)
if (tab[mid][bytes])
cmp = -1;
else
return TRUE;
if (cmp < 0)
n = mid;
else {
n -= mid + 1;
tab += mid + 1;
}
}
return FALSE;
}