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medit/moo/mooedit/moolang-rules.c

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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4; coding: utf-8 -*-
*
* moolang-rules.c
*
* Copyright (C) 2004-2006 by Yevgen Muntyan <muntyan@math.tamu.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* See COPYING file that comes with this distribution.
*/
#define MOOEDIT_COMPILATION
#include "mooedit/moolang-rules.h"
#include "mooedit/moolang-aux.h"
typedef MooRuleMatchFlags MatchFlags;
#define MATCH_START_ONLY MOO_RULE_MATCH_START_ONLY
#define MooRuleString MooRuleAsciiString
#define MooRuleChar MooRuleAsciiChar
#define MooRule2Char MooRuleAscii2Char
#define MooRuleAnyChar MooRuleAsciiAnyChar
typedef MooRule* (*MatchFunc) (MooRule *self,
MooRuleMatchData *data,
MooRuleMatchResult *result,
MooRuleMatchFlags flags);
typedef void (*DestroyFunc) (MooRule *self);
static MooRule *rule_new (MooRuleFlags flags,
const char *style,
MatchFunc match_func,
DestroyFunc destroy_func);
static void child_rules_match (MooRuleArray *array,
MatchData *data,
MatchResult *result);
static MooRule *rules_match_real (MooRuleArray *array,
MatchData *data,
MatchResult *result,
MatchFlags flags);
void
moo_match_data_init (MatchData *data,
int line_number,
const GtkTextIter *line_start,
const GtkTextIter *line_end)
{
GtkTextBuffer *buffer;
g_assert (data != NULL);
g_assert (line_start && gtk_text_iter_starts_line (line_start));
g_assert (line_number == gtk_text_iter_get_line (line_start));
g_assert (!line_end || gtk_text_iter_ends_line (line_end));
data->line_start = *line_start;
data->line_number = line_number;
if (line_end)
{
data->line_end = *line_end;
}
else
{
data->line_end = *line_start;
if (!gtk_text_iter_ends_line (&data->line_end))
gtk_text_iter_forward_to_line_end (&data->line_end);
}
buffer = gtk_text_iter_get_buffer (line_start);
data->line_string = gtk_text_buffer_get_slice (buffer, line_start, &data->line_end, TRUE);
data->line_string_len = strlen (data->line_string);
data->start_iter = *line_start;
data->start = data->line_string;
data->start_offset = 0;
}
void
moo_match_data_set_start (MatchData *data,
const GtkTextIter *start_iter,
char *start,
int start_offset)
{
g_assert (data != NULL);
g_assert (start != NULL);
g_assert (start_offset >= 0);
data->start = start;
data->start_offset = start_offset;
if (start_iter)
{
data->start_iter = *start_iter;
}
else
{
data->start_iter = data->line_start;
gtk_text_iter_forward_chars (&data->start_iter, start_offset);
}
}
void
moo_match_data_destroy (MatchData *data)
{
if (data->line_string)
g_free (data->line_string);
}
static MooRule*
rules_match_real (MooRuleArray *array,
MatchData *data,
MatchResult *result,
MatchFlags flags)
{
guint i;
MooRule *matched = NULL;
MatchResult tmp;
g_assert (array != NULL);
if (!array->len)
return NULL;
if (flags & MATCH_START_ONLY)
{
data->limit = data->start;
data->limit_offset = 0;
}
else
{
data->limit = NULL;
data->limit_offset = SIZE_NOT_SET;
}
for (i = 0; i < array->len; ++i)
{
MooRule *rule = array->data[i];
MooRule *matched_here = NULL;
if (!(flags & MATCH_START_ONLY))
{
/* TODO: first-non-blank */
if ((rule->flags & MOO_RULE_MATCH_FIRST_CHAR) && data->start != data->line_string)
continue;
}
if ((rule->flags & MOO_RULE_MATCH_FIRST_LINE) && data->line_number != 0)
continue;
matched_here = rule->match (rule, data, &tmp, flags);
if (matched_here)
{
if (!(flags & MATCH_START_ONLY))
{
if (!matched || tmp.match_start < result->match_start)
{
matched = matched_here ? matched_here : rule;
*result = tmp;
data->limit = tmp.match_start;
data->limit_offset = tmp.match_offset;
}
if (tmp.match_start == data->start)
break;
}
else
{
matched = matched_here ? matched_here : rule;
*result = tmp;
break;
}
}
}
if (matched && matched->child_rules)
child_rules_match (matched->child_rules, data, result);
return matched;
}
static void
child_rules_match (MooRuleArray *array,
MatchData *data,
MatchResult *result)
{
MatchResult tmp;
MooRule *matched;
char *saved_start;
g_assert (array != NULL);
g_assert (result->match_start != NULL);
g_assert (result->match_end != NULL);
g_assert (result->match_start <= result->match_end);
tmp = *result;
saved_start = data->start;
data->start = result->match_end;
matched = rules_match_real (array, data, &tmp, MATCH_START_ONLY);
if (matched)
{
g_return_if_fail (tmp.match_start == result->match_end);
result->match_end = tmp.match_end;
if (tmp.match_len >= 0)
{
if (result->match_len >= 0)
result->match_len += tmp.match_len;
}
else
{
result->match_len = -1;
}
}
data->start = saved_start;
}
MooRule*
moo_rule_array_match (MooRuleArray *array,
MatchData *data,
MatchResult *result)
{
return rules_match_real (array, data, result, 0);
}
static MooRule*
rule_new (MooRuleFlags flags,
const char *style,
MatchFunc match_func,
DestroyFunc destroy_func)
{
MooRule *rule;
g_return_val_if_fail (match_func != NULL, NULL);
rule = g_new0 (MooRule, 1);
rule->match = match_func;
rule->destroy = destroy_func;
rule->flags = flags;
rule->style = g_strdup (style);
return rule;
}
void
moo_rule_free (MooRule *rule)
{
guint i;
if (!rule)
return;
if (rule->destroy)
rule->destroy (rule);
if (rule->child_rules)
{
for (i = 0; i < rule->child_rules->len; ++i)
moo_rule_free (rule->child_rules->data[i]);
g_ptr_array_free ((GPtrArray*) rule->child_rules, TRUE);
}
g_free (rule->description);
g_free (rule->style);
g_free (rule);
}
void
moo_rule_add_child_rule (MooRule *rule,
MooRule *child_rule)
{
g_return_if_fail (rule != NULL && child_rule != NULL);
if (!rule->child_rules)
rule->child_rules = (MooRuleArray*) g_ptr_array_new ();
g_ptr_array_add ((GPtrArray*) rule->child_rules, child_rule);
}
void
moo_rule_set_end_stay (MooRule *rule)
{
g_return_if_fail (rule != NULL);
rule->exit.type = MOO_CONTEXT_STAY;
rule->exit.num = 0;
}
void
moo_rule_set_end_pop (MooRule *rule,
guint num)
{
g_return_if_fail (rule != NULL && num != 0);
rule->exit.type = MOO_CONTEXT_POP;
rule->exit.num = num;
}
void
moo_rule_set_end_switch (MooRule *rule,
MooContext *target)
{
g_return_if_fail (rule != NULL && target != 0);
rule->exit.type = MOO_CONTEXT_SWITCH;
rule->exit.ctx = target;
}
/*************************************************************************/
/* String match
*/
static MooRule*
rule_string_match (MooRule *rule,
MatchData *data,
MatchResult *result,
MatchFlags flags)
{
/* TODO: limit */
result->match_start = NULL;
if (rule->str.caseless)
{
if (flags & MATCH_START_ONLY)
{
if (!g_ascii_strncasecmp (data->start, rule->str.string, rule->str.length))
result->match_start = data->start;
}
else
{
result->match_start = ascii_casestrstr (data->start, rule->str.string);
}
}
else
{
if (flags & MATCH_START_ONLY)
{
if (!strncmp (data->start, rule->str.string, rule->str.length))
result->match_start = data->start;
}
else
{
result->match_start = strstr (data->start, rule->str.string);
}
}
if (!result->match_start)
return NULL;
result->match_end = result->match_start + rule->str.length;
result->match_len = rule->str.length;
result->match_offset = -1;
return rule;
}
static void
rule_string_destroy (MooRule *rule)
{
g_free (rule->str.string);
}
MooRule*
moo_rule_string_new (const char *string,
MooRuleFlags flags,
const char *style)
{
MooRule *rule;
guint length;
g_return_val_if_fail (string && string[0], NULL);
g_return_val_if_fail (g_utf8_validate (string, -1, NULL), NULL);
g_return_val_if_fail (string_is_ascii (string), NULL);
length = strlen (string);
g_return_val_if_fail (length != 0, NULL);
rule = rule_new (flags, style, rule_string_match, rule_string_destroy);
g_return_val_if_fail (rule != NULL, NULL);
rule->description = g_strdup_printf ("STRING %s", string);
rule->str.caseless = (flags & MOO_RULE_MATCH_CASELESS) ? TRUE : FALSE;
if (rule->str.caseless)
rule->str.string = g_ascii_strdown (string, -1);
else
rule->str.string = g_strdup (string);
rule->str.length = length;
return rule;
}
/*************************************************************************/
/* Regex match
*/
static MooRule*
rule_regex_match (MooRule *rule,
MatchData *data,
MatchResult *result,
MatchFlags flags)
{
/* TODO: limit */
/* XXX line start and stuff */
int n_matches, start_pos, end_pos;
EggRegexMatchFlags regex_flags = 0;
egg_regex_clear (rule->regex.regex);
if (flags & MATCH_START_ONLY)
regex_flags |= EGG_REGEX_MATCH_ANCHORED;
n_matches = egg_regex_match_extended (rule->regex.regex,
data->line_string, data->line_string_len,
data->start - data->line_string,
regex_flags);
if (n_matches <= 0)
return NULL;
egg_regex_fetch_pos (rule->regex.regex, data->line_string, 0,
&start_pos, &end_pos);
result->match_start = data->line_string + start_pos;
result->match_end = data->line_string + end_pos;
result->match_len = -1;
result->match_offset = -1;
return rule;
}
static void
rule_regex_destroy (MooRule *rule)
{
egg_regex_free (rule->regex.regex);
}
MooRule*
moo_rule_regex_new (const char *pattern,
gboolean non_empty,
EggRegexCompileFlags regex_compile_options,
EggRegexMatchFlags regex_match_options,
MooRuleFlags flags,
const char *style)
{
MooRule *rule;
EggRegex *regex;
GError *error = NULL;
g_return_val_if_fail (pattern && pattern[0], NULL);
if (flags & MOO_RULE_MATCH_CASELESS)
regex_compile_options |= EGG_REGEX_CASELESS;
if (non_empty)
regex_match_options |= EGG_REGEX_MATCH_NOTEMPTY;
regex = egg_regex_new (pattern, regex_compile_options,
regex_match_options, &error);
if (error)
{
g_warning ("could not compile pattern '%s': %s",
pattern, error->message);
g_error_free (error);
egg_regex_unref (regex);
return NULL;
}
egg_regex_optimize (regex, &error);
if (error)
{
g_warning ("egg_regex_optimize() failed: %s", error->message);
g_error_free (error);
}
if (pattern[0] == '^')
flags |= MOO_RULE_MATCH_FIRST_CHAR;
rule = rule_new (flags, style, rule_regex_match, rule_regex_destroy);
if (!rule)
{
egg_regex_free (regex);
return NULL;
}
rule->description = g_strdup_printf ("REGEX %s", pattern);
rule->regex.regex = regex;
return rule;
}
/*************************************************************************/
/* Char match
*/
static MooRule*
rule_char_match (MooRule *rule,
MatchData *data,
MatchResult *result,
MatchFlags flags)
{
result->match_start = NULL;
if (flags & MATCH_START_ONLY)
{
if (rule->_char.caseless)
{
if (data->start[0] == rule->_char.ch)
result->match_start = data->start;
}
else
{
if (g_ascii_tolower (data->start[0]) == rule->_char.ch)
result->match_start = data->start;
}
}
else
{
if (rule->_char.caseless)
result->match_start = ascii_lower_strchr (data->start, rule->_char.ch);
else
result->match_start = strchr (data->start, rule->_char.ch);
}
if (!result->match_start)
return NULL;
result->match_end = result->match_start + 1;
result->match_len = 1;
result->match_offset = -1;
return rule;
}
static MooRule*
rule_2char_match (MooRule *rule,
MatchData *data,
MatchResult *result,
MatchFlags flags)
{
result->match_start = NULL;
if (flags & MATCH_START_ONLY)
{
if (data->start[0] == rule->_2char.str[0] && data->start[1] == rule->_2char.str[1])
result->match_start = data->start;
}
else
{
result->match_start = strstr (data->start, rule->_2char.str);
}
if (!result->match_start)
return NULL;
result->match_end = result->match_start + 2;
result->match_len = 2;
result->match_offset = -1;
return rule;
}
MooRule*
moo_rule_char_new (char ch,
MooRuleFlags flags,
const char *style)
{
MooRule *rule;
g_return_val_if_fail (ch && CHAR_IS_ASCII (ch), NULL);
rule = rule_new (flags, style, rule_char_match, NULL);
g_return_val_if_fail (rule != NULL, NULL);
rule->description = g_strdup_printf ("CHAR %c", ch);
if (flags & MOO_RULE_MATCH_CASELESS)
{
rule->_char.ch = g_ascii_tolower (ch);
rule->_char.caseless = TRUE;
}
else
{
rule->_char.ch = ch;
}
return rule;
}
MooRule*
moo_rule_2char_new (char ch1,
char ch2,
MooRuleFlags flags,
const char *style)
{
MooRule *rule;
g_return_val_if_fail (ch1 && CHAR_IS_ASCII (ch1), NULL);
g_return_val_if_fail (ch2 && CHAR_IS_ASCII (ch2), NULL);
rule = rule_new (flags, style, rule_2char_match, NULL);
g_return_val_if_fail (rule != NULL, NULL);
rule->description = g_strdup_printf ("TWOCHARS %c%c", ch1, ch2);
if (flags & MOO_RULE_MATCH_CASELESS)
{
ch1 = g_ascii_tolower (ch1);
ch2 = g_ascii_tolower (ch2);
}
rule->_2char.str[0] = ch1;
rule->_2char.str[1] = ch2;
rule->_2char.str[2] = 0;
return rule;
}
/*************************************************************************/
/* AnyChar match
*/
static MooRule*
rule_any_char_match (MooRule *rule,
MatchData *data,
MatchResult *result,
MatchFlags flags)
{
guint i;
result->match_start = NULL;
if (flags & MATCH_START_ONLY)
{
for (i = 0; i < rule->anychar.n_chars; ++i)
{
if (data->start[0] == rule->anychar.chars[i])
{
result->match_start = data->start;
break;
}
}
}
else
{
for (i = 0; i < rule->anychar.n_chars; ++i)
{
if (!result->match_start)
{
result->match_start = strchr (data->start, rule->anychar.chars[i]);
}
else if (result->match_start == data->start + 1)
{
if (data->start[0] == rule->anychar.chars[i])
{
result->match_start = data->start;
break;
}
}
else
{
char *tmp = strchr (data->start, rule->anychar.chars[i]);
if (tmp < result->match_start)
result->match_start = tmp;
}
if (result->match_start == data->start)
break;
}
}
if (!result->match_start)
return NULL;
result->match_end = result->match_start + 1;
result->match_len = 1;
result->match_offset = -1;
return rule;
}
static void
rule_any_char_destroy (MooRule *rule)
{
g_free (rule->anychar.chars);
}
MooRule*
moo_rule_any_char_new (const char *string,
MooRuleFlags flags,
const char *style)
{
MooRule *rule;
guint i, len;
g_return_val_if_fail (string && string[0], NULL);
len = strlen (string);
for (i = 0; i < len; ++i)
g_return_val_if_fail (CHAR_IS_ASCII (string[i]), NULL);
rule = rule_new (flags, style, rule_any_char_match, rule_any_char_destroy);
g_return_val_if_fail (rule != NULL, NULL);
rule->description = g_strdup_printf ("ANYCHAR %s", string);
rule->anychar.n_chars = len;
rule->anychar.chars = g_strdup (string);
return rule;
}
/*************************************************************************/
/* Keywords
*/
MooRule*
moo_rule_keywords_new (GSList *words,
MooRuleFlags flags,
const char *style)
{
GSList *l;
GString *pattern;
MooRule *rule = NULL;
g_return_val_if_fail (words != NULL, NULL);
pattern = g_string_new ("\\b(");
for (l = words; l != NULL; l = l->next)
{
char *word = l->data;
if (!word || !word[0])
{
g_warning ("%s: empty keyword", G_STRLOC);
goto out;
}
if (l != words)
g_string_append_c (pattern, '|');
g_string_append (pattern, word);
}
g_string_append (pattern, ")\\b");
rule = moo_rule_regex_new (pattern->str, TRUE, 0, 0, flags, style);
out:
g_string_free (pattern, TRUE);
return rule;
}
/*************************************************************************/
/* IncludeRules
*/
static MooRule*
rule_include_match (MooRule *rule,
MatchData *data,
MatchResult *result,
MatchFlags flags)
{
return rules_match_real (rule->incl.ctx->rules, data, result, flags);
}
MooRule*
moo_rule_include_new (MooContext *ctx)
{
MooRule *rule;
g_return_val_if_fail (ctx != NULL, NULL);
rule = rule_new (0, NULL, rule_include_match, NULL);
g_return_val_if_fail (rule != NULL, NULL);
rule->description = g_strdup_printf ("INCLUDE %s", ctx->name);
rule->incl.ctx = ctx;
return rule;
}
/*************************************************************************/
/* Special sequences
*/
#if 0
#define ISDIGIT(c__) (c__ >= '0' && c__ <= '9')
static MooRule*
rule_int_match (MooRule *rule,
MatchData *data,
MatchResult *result,
MatchFlags flags)
{
if (flags & MATCH_START_ONLY)
{
if (ISDIGIT(data->start[0]))
{
guint i;
for (i = 1; ISDIGIT(data->start[i]); ++i) ;
result->match_start = data->start;
result->match_end = result->match_start + i;
result->match_len = i;
result->match_offset = -1;
return rule;
}
else
{
return NULL;
}
}
else
{
guint i;
for (i = 0; data->start[i] && !ISDIGIT(data->start[i]); ++i) ;
if (!data->start[i])
return NULL;
result->match_start = data->start + i;
for ( ; ISDIGIT(data->start[i]); ++i) ;
result->match_end = result->match_start + i;
result->match_len = result->match_end - result->match_start;
result->match_offset = -1;
return rule;
}
}
#endif
#define PATTERN_INT "[0-9]*"
#define PATTERN_FLOAT "[0-9]*\\.[0-9]*"
#define PATTERN_OCTAL "0[0-7]+"
#define PATTERN_HEX "0x[0-9A-Fa-f]+"
#define PATTERN_ESC_CHAR "\\\\([abefnrtv\"'?\\\\]|0[0-7]*|x[0-9A-Fa-f])"
#define PATTERN_C_CHAR "'" PATTERN_ESC_CHAR "'"
#define PATTERN_IDENTIFIER "[a-zA-Z_][a-zA-Z0-9_]*"
#define PATTERN_WHITESPACE "\\s+"
MooRule*
moo_rule_int_new (MooRuleFlags flags,
const char *style)
{
return moo_rule_regex_new (PATTERN_INT, TRUE, 0, 0, flags, style);
}
MooRule*
moo_rule_float_new (MooRuleFlags flags,
const char *style)
{
return moo_rule_regex_new (PATTERN_FLOAT, TRUE, 0, 0, flags, style);
}
MooRule*
moo_rule_octal_new (MooRuleFlags flags,
const char *style)
{
return moo_rule_regex_new (PATTERN_OCTAL, TRUE, 0, 0, flags, style);
}
MooRule*
moo_rule_hex_new (MooRuleFlags flags,
const char *style)
{
return moo_rule_regex_new (PATTERN_HEX, TRUE, 0, 0, flags, style);
}
MooRule*
moo_rule_escaped_char_new (MooRuleFlags flags,
const char *style)
{
return moo_rule_regex_new (PATTERN_ESC_CHAR, TRUE, 0, 0, flags, style);
}
MooRule*
moo_rule_c_char_new (MooRuleFlags flags,
const char *style)
{
return moo_rule_regex_new (PATTERN_C_CHAR, TRUE, 0, 0, flags, style);
}
MooRule*
moo_rule_whitespace_new (MooRuleFlags flags,
const char *style)
{
return moo_rule_regex_new (PATTERN_WHITESPACE, TRUE, 0, 0, flags, style);
}
MooRule*
moo_rule_identifier_new (MooRuleFlags flags,
const char *style)
{
return moo_rule_regex_new (PATTERN_IDENTIFIER, TRUE, 0, 0, flags, style);
}
MooRule*
moo_rule_line_continue_new (MooRuleFlags flags,
const char *style)
{
MooRule *rule = moo_rule_regex_new ("\\\\$", TRUE, 0, 0, flags, style);
g_return_val_if_fail (rule != NULL, NULL);
rule->include_eol = TRUE;
return rule;
}
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