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gambas-source-code/main/lib/eval/eval_analyze.c
Benoît Minisini f65184802d [CONFIGURATION] 
* NEW: Update copyright and license string in all source files.


git-svn-id: svn://localhost/gambas/trunk@2241 867c0c6c-44f3-4631-809d-bfa615b0a4ec
2009-08-17 10:41:51 +00:00

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/***************************************************************************
eval_analyze.c
(c) 2000-2009 Benoît Minisini <gambas@users.sourceforge.net>
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, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
***************************************************************************/
#define __EVAL_ANALYZE_C
#include "gambas.h"
#include "gb_common.h"
#include "eval_analyze.h"
#include "CSystem.h"
/*#define DEBUG*/
static EVAL_COLOR colors[EVAL_MAX_COLOR];
static int colors_len;
static int get_type(PATTERN *pattern)
{
int type = PATTERN_type(*pattern);
int index = PATTERN_index(*pattern);
if (type == EVAL_TYPE_RESERVED)
{
if (index >= RS_COLON)
{
if (!((index == RS_AND || index == RS_OR) && PATTERN_is(pattern[1], RS_IF)))
type = EVAL_TYPE_OPERATOR;
}
else if (RES_is_type(index))
type = EVAL_TYPE_DATATYPE;
}
return type;
}
static int is_me_last(PATTERN pattern)
{
return PATTERN_is(pattern, RS_ME)
|| PATTERN_is(pattern, RS_SUPER)
|| PATTERN_is(pattern, RS_LAST)
|| PATTERN_is(pattern, RS_OPTIONAL)
|| PATTERN_is(pattern, RS_TRUE)
|| PATTERN_is(pattern, RS_FALSE)
|| PATTERN_is(pattern, RS_NULL)
|| PATTERN_is(pattern, RS_BYREF);
}
static void get_symbol(PATTERN pattern, const char **symbol, int *len)
{
static char keyword[16];
int i;
SYMBOL *sym;
int type = PATTERN_type(pattern);
int index = PATTERN_index(pattern);
switch(type)
{
case RT_RESERVED:
sym = TABLE_get_symbol(COMP_res_table, index);
break;
case RT_NUMBER:
case RT_IDENTIFIER:
case RT_CLASS:
sym = TABLE_get_symbol(EVAL->table, index);
break;
case RT_STRING:
case RT_TSTRING:
case RT_COMMENT:
case EVAL_TYPE_ERROR:
sym = TABLE_get_symbol(EVAL->string, index);
break;
case RT_SUBR:
*symbol = COMP_subr_info[index].name;
*len = strlen(*symbol);
return;
default:
*symbol = NULL;
*len = 0;
return;
}
*symbol = sym->name;
*len = sym->len;
if (*len > EVAL_COLOR_MAX_LEN)
*len = EVAL_COLOR_MAX_LEN;
if (type == RT_RESERVED && !EVAL->rewrite)
{
memcpy(keyword, sym->name, sym->len);
for (i = 0; i < sym->len; i++)
keyword[i] = toupper(keyword[i]);
*symbol = keyword;
}
}
static void add_data(int state, int len)
{
EVAL_COLOR *color;
if (colors_len >= EVAL_MAX_COLOR || len == 0)
return;
//printf("[%d] %d %d\n", colors_len, state, len);
color = &colors[colors_len];
color->state = state;
color->len = len;
color->alternate = FALSE;
colors_len++;
}
static int is_proc(void)
{
PATTERN pattern;
int i;
if (!EVAL->pattern)
return FALSE;
for (i = 0;; i++)
{
pattern = EVAL->pattern[i];
if (PATTERN_is_end(pattern))
return FALSE;
if (PATTERN_is(pattern, RS_PRIVATE) || PATTERN_is(pattern, RS_PUBLIC) || PATTERN_is(pattern, RS_STATIC))
continue;
return (PATTERN_is(pattern, RS_SUB) || PATTERN_is(pattern, RS_PROCEDURE) || PATTERN_is(pattern, RS_FUNCTION));
}
}
static int get_indent(bool *empty)
{
int i;
unsigned char c;
*empty = TRUE;
for (i = 0; i < (int)EVAL->len; i++)
{
c = EVAL->source[i];
if (c > ' ')
{
*empty = FALSE;
break;
}
}
return i;
}
static int get_utf8_length(const char *s, int l)
{
int len;
int i;
for (i = 0, len = 0; i < l; i++)
{
if ((s[i] & 0xC0) != 0x80)
len++;
}
return len;
}
static void analyze(EVAL_ANALYZE *result)
{
PATTERN *pattern;
const char *src;
int nspace;
bool empty;
int type, old_type, next_type;
const char *symbol;
bool space_before, space_after, in_quote;
//bool me = FALSE;
int len;
pattern = EVAL->pattern;
src = EVAL->source;
colors_len = 0;
if (EVAL->len <= 0)
return;
if (!EVAL->comment)
{
nspace = get_indent(&empty);
add_data(EVAL_TYPE_END, nspace);
}
if (empty)
return;
if (!EVAL->pattern)
return;
if (nspace)
GB.AddString(&result->str, EVAL->source, nspace);
type = EVAL->comment ? EVAL_TYPE_COMMENT : EVAL_TYPE_END;
next_type = EVAL_TYPE_END;
space_after = FALSE;
in_quote = FALSE;
for(;;)
{
old_type = next_type;
type = get_type(pattern);
next_type = type;
get_symbol(*pattern, &symbol, &len);
space_before = space_after;
space_after = FALSE;
if (type == EVAL_TYPE_END)
break;
if (in_quote && (type == EVAL_TYPE_RESERVED || type == EVAL_TYPE_DATATYPE || type == EVAL_TYPE_SUBR))
type = EVAL_TYPE_IDENTIFIER;
switch(type)
{
case EVAL_TYPE_RESERVED:
//state = Keyword;
//if (old_type != EVAL_TYPE_OPERATOR)
//me = is_me_last(*pattern);
if (!is_me_last(*pattern))
space_before = TRUE;
else
{
next_type = EVAL_TYPE_IDENTIFIER;
if (old_type != EVAL_TYPE_OPERATOR)
space_before = TRUE;
}
/*if (PATTERN_index(*pattern) >= RS_COLON)
{
int i;
for (i = 0; i < len; i++)
usym[i] = GB.toupper(symbol[i]);
usym[len] = 0;
symbol = usym;
}*/
break;
case EVAL_TYPE_DATATYPE:
//state = Datatype;
if (old_type != EVAL_TYPE_OPERATOR)
space_before = TRUE;
break;
case EVAL_TYPE_IDENTIFIER:
case EVAL_TYPE_CLASS:
//state = Symbol;
if (old_type != EVAL_TYPE_OPERATOR)
space_before = TRUE;
break;
case EVAL_TYPE_NUMBER:
//state = Number;
if (old_type != EVAL_TYPE_OPERATOR)
space_before = TRUE;
break;
case EVAL_TYPE_STRING:
//state = String;
if (old_type != EVAL_TYPE_OPERATOR)
space_before = TRUE;
break;
case EVAL_TYPE_SUBR:
//state = Subr;
if (old_type != EVAL_TYPE_OPERATOR)
space_before = TRUE;
break;
case EVAL_TYPE_COMMENT:
//state = Commentary;
space_before = *symbol != ' ';
break;
case EVAL_TYPE_OPERATOR:
if (index("([)]@", *symbol))
{
space_after = FALSE;
}
else if (index(":;,", *symbol))
{
space_before = FALSE;
space_after = TRUE;
}
else if (index("#{", *symbol))
{
if (old_type != EVAL_TYPE_OPERATOR)
space_before = TRUE;
space_after = FALSE;
in_quote = *symbol == '{';
}
else if (index("}", *symbol))
{
space_before = FALSE;
space_after = FALSE;
in_quote = FALSE;
}
else if (index(".!", *symbol)) //symbol[0] == '.' && symbol[1] == 0)
{
//space_before = FALSE;
space_after = FALSE;
}
else if (PATTERN_is(*pattern, RS_NOT))
{
space_after = TRUE;
}
else if (*symbol == '-')
{
if (old_type == EVAL_TYPE_OPERATOR && (PATTERN_is(pattern[-1], RS_LBRA) || PATTERN_is(pattern[-1],RS_LSQR)))
space_before = FALSE;
else
space_before = TRUE;
space_after = TRUE;
}
else
{
space_before = TRUE;
space_after = TRUE;
}
if (old_type == EVAL_TYPE_RESERVED)
space_before = TRUE;
break;
case EVAL_TYPE_ERROR:
space_before = TRUE;
break;
}
if (space_before && old_type != EVAL_TYPE_END)
{
GB.AddString(&result->str, " ", 1);
add_data(EVAL_TYPE_END, 1);
}
if (type == EVAL_TYPE_STRING)
GB.AddString(&result->str, "\"", 1);
//len = strlen(symbol);
/*if (type == EVAL_TYPE_IDENTIFIER && len >= 2 &&
islower(symbol[0]) && islower(symbol[1]))
{
char c = toupper(symbol[0]);
GB.AddString(&result->str, &c, 1);
GB.AddString(&result->str, &symbol[1], len - 1);
}
else*/
if (len)
{
GB.AddString(&result->str, symbol, len);
//printf("add: %.*s\n", len, symbol);
len = get_utf8_length(symbol, len);
}
if (type == EVAL_TYPE_STRING)
{
GB.AddString(&result->str, "\"", 1);
len += 2;
}
add_data(type, len);
//printf("add_data: %.d (%d)\n", type, len);
pattern++;
}
result->color = colors;
result->len = colors_len;
//fprintf(stderr, "analyze: %d %s\n", strlen(result->str), result->str);
}
#define add_pattern(_type, _index) EVAL->pattern[EVAL->pattern_count++] = PATTERN_make((_type), (_index));
static void add_end_pattern(void)
{
int index;
int len;
len = EVAL->len - (READ_source_ptr - EVAL->source);
if (len > 0)
{
TABLE_add_symbol(EVAL->string, READ_source_ptr, len, NULL, &index);
add_pattern(EVAL_TYPE_ERROR, index);
}
add_pattern(EVAL_TYPE_END, 0);
//get_symbol(PATTERN_make(EVAL_TYPE_ERROR, index), &sym, &len);
}
PUBLIC void EVAL_analyze(const char *src, int len, int state, EVAL_ANALYZE *result, bool rewrite)
{
int nspace = 0;
#ifdef DEBUG
printf("EVAL: %*.s\n", expr->len, expr->source);
#endif
CLEAR(result);
while (len > 0 && src[len - 1] == ' ')
{
len--;
nspace++;
}
result->len = 0;
result->str = NULL;
if (len > 0)
{
EVAL = &EVAL_read_expr;
EVAL_clear(EVAL);
GB.NewString(&EVAL->source, src, len);
GB.AddString(&EVAL->source, "\0\0", 2);
EVAL->len = len;
EVAL->analyze = TRUE;
EVAL->rewrite = rewrite;
EVAL->comment = state == EVAL_TYPE_COMMENT;
//fprintf(stderr, "EVAL_analyze: [%d] %.*s\n", EVAL->comment, len, src);
EVAL_start(EVAL);
TRY
{
EVAL_read();
}
CATCH
{
add_end_pattern();
}
END_TRY
analyze(result);
result->proc = is_proc();
result->state = EVAL->comment ? EVAL_TYPE_COMMENT : EVAL_TYPE_END;
//fprintf(stderr, "--> [%d]\n", EVAL->comment);
GB.FreeString(&EVAL->source);
}
else
{
result->proc = FALSE;
}
while (nspace > 0)
{
GB.AddString(&result->str, " ", nspace > 8 ? 8 : nspace);
nspace -= 8;
}
}
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