074e2f98c7
* NEW: Arguments passed by reference were implemented. [COMPILER] * NEW: Arguments passed by reference were implemented. git-svn-id: svn://localhost/gambas/trunk@1016 867c0c6c-44f3-4631-809d-bfa615b0a4ec
473 lines
9.5 KiB
C
473 lines
9.5 KiB
C
/***************************************************************************
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eval_analyze.c
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Syntax highlighting
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(c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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***************************************************************************/
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#define __EVAL_ANALYZE_C
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#include "gambas.h"
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#include "gb_common.h"
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#include "eval_analyze.h"
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/*#define DEBUG*/
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static EVAL_COLOR colors[EVAL_MAX_COLOR];
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static int colors_len;
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static int get_type(PATTERN *pattern)
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{
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int type = PATTERN_type(*pattern);
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int index = PATTERN_index(*pattern);
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if (type == EVAL_TYPE_RESERVED)
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{
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if (index >= RS_COLON)
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{
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if (!((index == RS_AND || index == RS_OR) && PATTERN_is(pattern[1], RS_IF)))
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type = EVAL_TYPE_OPERATOR;
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}
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else if (RES_is_type(index))
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type = EVAL_TYPE_DATATYPE;
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}
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return type;
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}
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static int is_me_last(PATTERN pattern)
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{
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return PATTERN_is(pattern, RS_ME)
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|| PATTERN_is(pattern, RS_SUPER)
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|| PATTERN_is(pattern, RS_LAST)
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|| PATTERN_is(pattern, RS_OPTIONAL)
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|| PATTERN_is(pattern, RS_TRUE)
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|| PATTERN_is(pattern, RS_FALSE)
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|| PATTERN_is(pattern, RS_NULL);
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}
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static void get_symbol(PATTERN pattern, const char **symbol, int *len)
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{
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SYMBOL *sym;
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int type = PATTERN_type(pattern);
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int index = PATTERN_index(pattern);
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switch(type)
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{
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case RT_RESERVED:
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sym = TABLE_get_symbol(COMP_res_table, index);
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break;
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case RT_NUMBER:
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case RT_IDENTIFIER:
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case RT_CLASS:
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sym = TABLE_get_symbol(EVAL->table, index);
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break;
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case RT_STRING:
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case RT_TSTRING:
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case RT_COMMENT:
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case EVAL_TYPE_ERROR:
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sym = TABLE_get_symbol(EVAL->string, index);
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break;
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case RT_SUBR:
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*symbol = COMP_subr_info[index].name;
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*len = strlen(*symbol);
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return;
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default:
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*symbol = NULL;
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*len = 0;
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return;
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}
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*symbol = sym->name;
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*len = sym->len;
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if (*len > 4096)
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*len = 4096;
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}
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static void add_data(int state, int len)
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{
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EVAL_COLOR *color;
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if (colors_len >= EVAL_MAX_COLOR)
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return;
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//printf("[%d] %d %d\n", colors_len, state, len);
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color = &colors[colors_len];
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color->state = state;
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color->len = len;
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colors_len++;
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}
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static int is_proc(void)
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{
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PATTERN pattern;
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int i;
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if (!EVAL->pattern)
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return FALSE;
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for (i = 0;; i++)
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{
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pattern = EVAL->pattern[i];
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if (PATTERN_is_end(pattern))
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return FALSE;
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if (PATTERN_is(pattern, RS_PRIVATE) || PATTERN_is(pattern, RS_PUBLIC) || PATTERN_is(pattern, RS_STATIC))
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continue;
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return (PATTERN_is(pattern, RS_SUB) || PATTERN_is(pattern, RS_PROCEDURE) || PATTERN_is(pattern, RS_FUNCTION));
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}
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}
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static int get_indent(bool *empty)
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{
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int i;
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unsigned char c;
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*empty = TRUE;
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for (i = 0; i < (int)EVAL->len; i++)
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{
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c = EVAL->source[i];
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if (c > ' ')
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{
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*empty = FALSE;
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break;
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}
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}
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return i;
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}
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static int get_utf8_length(const char *s, int l)
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{
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int len;
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int i;
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for (i = 0, len = 0; i < l; i++)
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{
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if ((s[i] & 0xC0) != 0x80)
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len++;
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}
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return len;
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}
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static void analyze(EVAL_ANALYZE *result)
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{
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PATTERN *pattern;
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const char *src;
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int nspace;
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bool empty;
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int type, old_type, next_type;
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const char *symbol;
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bool space_before, space_after;
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//bool me = FALSE;
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int len;
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pattern = EVAL->pattern;
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src = EVAL->source;
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colors_len = 0;
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if (EVAL->len <= 0)
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return;
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nspace = get_indent(&empty);
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add_data(EVAL_TYPE_END, nspace);
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if (empty)
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return;
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if (!EVAL->pattern)
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return;
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if (nspace)
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GB.AddString(&result->str, EVAL->source, nspace);
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type = EVAL_TYPE_END;
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next_type = EVAL_TYPE_END;
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space_after = FALSE;
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for(;;)
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{
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old_type = next_type;
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type = get_type(pattern);
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next_type = type;
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get_symbol(*pattern, &symbol, &len);
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space_before = space_after;
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space_after = FALSE;
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if (type == EVAL_TYPE_END)
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break;
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switch(type)
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{
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case EVAL_TYPE_RESERVED:
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//state = Keyword;
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//if (old_type != EVAL_TYPE_OPERATOR)
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//me = is_me_last(*pattern);
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if (!is_me_last(*pattern))
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space_before = TRUE;
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else
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{
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next_type = EVAL_TYPE_IDENTIFIER;
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if (old_type != EVAL_TYPE_OPERATOR)
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space_before = TRUE;
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}
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/*if (PATTERN_index(*pattern) >= RS_COLON)
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{
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int i;
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for (i = 0; i < len; i++)
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usym[i] = GB.toupper(symbol[i]);
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usym[len] = 0;
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symbol = usym;
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}*/
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break;
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case EVAL_TYPE_DATATYPE:
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//state = Datatype;
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if (old_type != EVAL_TYPE_OPERATOR)
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space_before = TRUE;
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break;
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case EVAL_TYPE_IDENTIFIER:
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case EVAL_TYPE_CLASS:
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//state = Symbol;
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if (old_type != EVAL_TYPE_OPERATOR)
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space_before = TRUE;
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break;
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case EVAL_TYPE_NUMBER:
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//state = Number;
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if (old_type != EVAL_TYPE_OPERATOR)
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space_before = TRUE;
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break;
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case EVAL_TYPE_STRING:
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//state = String;
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if (old_type != EVAL_TYPE_OPERATOR)
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space_before = TRUE;
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break;
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case EVAL_TYPE_SUBR:
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//state = Subr;
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if (old_type != EVAL_TYPE_OPERATOR)
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space_before = TRUE;
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break;
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case EVAL_TYPE_COMMENT:
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//state = Commentary;
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space_before = *symbol != ' ';
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break;
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case EVAL_TYPE_OPERATOR:
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if (index("([)]@", *symbol))
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{
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space_after = FALSE;
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}
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else if (index(":;,", *symbol))
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{
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space_before = FALSE;
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space_after = TRUE;
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}
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else if (index("#{", *symbol))
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{
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if (old_type != EVAL_TYPE_OPERATOR)
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space_before = TRUE;
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space_after = FALSE;
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}
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else if (index("}", *symbol))
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{
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space_before = FALSE;
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space_after = FALSE;
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}
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else if (index(".!", *symbol)) //symbol[0] == '.' && symbol[1] == 0)
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{
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//space_before = FALSE;
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space_after = FALSE;
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}
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else if (PATTERN_is(*pattern, RS_NOT))
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{
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space_after = TRUE;
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}
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else if (*symbol == '-')
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{
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if (old_type == EVAL_TYPE_OPERATOR && (PATTERN_is(pattern[-1], RS_LBRA) || PATTERN_is(pattern[-1],RS_LSQR)))
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space_before = FALSE;
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else
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space_before = TRUE;
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space_after = TRUE;
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}
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else
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{
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space_before = TRUE;
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space_after = TRUE;
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}
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if (old_type == EVAL_TYPE_RESERVED)
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space_before = TRUE;
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break;
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case EVAL_TYPE_ERROR:
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space_before = TRUE;
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break;
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}
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if (space_before && old_type != EVAL_TYPE_END)
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{
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GB.AddString(&result->str, " ", 1);
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add_data(EVAL_TYPE_END, 1);
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}
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if (type == EVAL_TYPE_STRING)
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GB.AddString(&result->str, "\"", 1);
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//len = strlen(symbol);
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/*if (type == EVAL_TYPE_IDENTIFIER && len >= 2 &&
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islower(symbol[0]) && islower(symbol[1]))
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{
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char c = toupper(symbol[0]);
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GB.AddString(&result->str, &c, 1);
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GB.AddString(&result->str, &symbol[1], len - 1);
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}
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else*/
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if (len)
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{
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GB.AddString(&result->str, symbol, len);
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//printf("add: %.*s\n", len, symbol);
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len = get_utf8_length(symbol, len);
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}
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if (type == EVAL_TYPE_STRING)
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{
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GB.AddString(&result->str, "\"", 1);
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len += 2;
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}
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add_data(type, len);
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//printf("add_data: %.d (%d)\n", type, len);
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pattern++;
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}
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result->color = colors;
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result->len = colors_len;
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//fprintf(stderr, "analyze: %d %s\n", strlen(result->str), result->str);
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}
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#define add_pattern(_type, _index) EVAL->pattern[EVAL->pattern_count++] = PATTERN_make((_type), (_index));
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static void add_end_pattern(void)
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{
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int index;
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const char *sym;
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int len;
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len = EVAL->len - (READ_source_ptr - EVAL->source);
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if (len > 0)
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{
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TABLE_add_symbol(EVAL->string, READ_source_ptr, len, NULL, &index);
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add_pattern(EVAL_TYPE_ERROR, index);
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}
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add_pattern(EVAL_TYPE_END, 0);
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get_symbol(PATTERN_make(EVAL_TYPE_ERROR, index), &sym, &len);
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}
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PUBLIC void EVAL_analyze(const char *src, int len, EVAL_ANALYZE *result)
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{
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int nspace = 0;
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#ifdef DEBUG
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printf("EVAL: %*.s\n", expr->len, expr->source);
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#endif
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CLEAR(result);
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while (len > 0 && src[len - 1] == ' ')
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{
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len--;
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nspace++;
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}
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result->len = 0;
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result->str = NULL;
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if (len > 0)
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{
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EVAL = &EVAL_read_expr;
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EVAL_clear(EVAL);
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GB.NewString(&EVAL->source, src, len);
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GB.AddString(&EVAL->source, "\0\0", 2);
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EVAL->len = len;
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EVAL->analyze = TRUE;
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EVAL_start(EVAL);
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TRY
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{
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EVAL_read();
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}
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CATCH
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{
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add_end_pattern();
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}
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END_TRY
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result->proc = is_proc();
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analyze(result);
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GB.FreeString(&EVAL->source);
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}
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else
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{
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result->proc = FALSE;
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}
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while (nspace > 0)
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{
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GB.AddString(&result->str, " ", nspace > 8 ? 8 : nspace);
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nspace -= 8;
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}
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}
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