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/*
* $Id: basic.c 2287 2008-02-27 13:17:29Z eht16 $
*
* Copyright (c) 2000-2006, Darren Hiebert, Elias Pschernig
*
* This source code is released for free distribution under the terms of the
* GNU General Public License.
*
* This module contains functions for generating tags for BlitzBasic
* (BlitzMax), PureBasic and FreeBasic language files. For now, this is kept
* quite simple - but feel free to ask for more things added any time -
* patches are of course most welcome.
*/
/*
* INCLUDE FILES
*/
#include "general.h" /* must always come first */
#include <string.h>
#include "parse.h"
#include "read.h"
#include "vstring.h"
/*
* DATA DEFINITIONS
*/
typedef enum {
K_CONST,
K_FUNCTION,
K_LABEL,
K_TYPE,
K_VARIABLE,
K_ENUM
} BasicKind;
typedef struct {
char const *token;
BasicKind kind;
} KeyWord;
static kindOption BasicKinds[] = {
{TRUE, 'c', "macro", "constants"},
{TRUE, 'f', "function", "functions"},
{TRUE, 'l', "namespace", "labels"},
{TRUE, 't', "struct", "types"},
{TRUE, 'v', "variable", "variables"},
{TRUE, 'g', "externvar", "enumerations"}
};
static KeyWord freebasic_keywords[] = {
{"dim", K_VARIABLE}, /* must always be the first */
{"common", K_VARIABLE}, /* must always be the second */
{"const", K_CONST}, /* must always be the third */
{"function", K_FUNCTION},
{"sub", K_FUNCTION},
{"private sub", K_FUNCTION},
{"public sub", K_FUNCTION},
{"private function", K_FUNCTION},
{"public function", K_FUNCTION},
{"type", K_TYPE},
{"enum", K_ENUM},
{NULL, 0}
};
/*
* FUNCTION DEFINITIONS
*/
/* Match the name of a dim or const starting at pos. */
static int extract_dim (char const *pos, vString * name, BasicKind kind)
{
while (isspace (*pos))
pos++;
vStringClear (name);
if (strncasecmp (pos, "shared", 6) == 0)
pos += 6; /* skip keyword "shared" */
while (isspace (*pos))
pos++;
/* capture "dim as String str" */
if (strncasecmp (pos, "as", 2) == 0)
{
pos += 2; /* skip keyword "as" */
while (isspace (*pos))
pos++;
while (!isspace (*pos)) /* skip next part which is a type */
pos++;
while (isspace (*pos))
pos++;
/* now we are at the name */
}
/* capture "dim as foo ptr bar" */
if (strncasecmp (pos, "ptr", 3) == 0)
{
pos += 3; /* skip keyword "ptr" */
while (isspace (*pos))
pos++;
}
for (; *pos && !isspace (*pos) && *pos != '(' && *pos != ',' && *pos != '='; pos++)
vStringPut (name, *pos);
vStringTerminate (name);
makeSimpleTag (name, BasicKinds, kind);
/* if the line contains a ',', we have multiple declarations */
while (*pos && strchr (pos, ','))
{
/* skip all we don't need(e.g. "..., new_array(5), " we skip "(5)") */
while (*pos != ',' && *pos != '\'')
pos++;
if (*pos == '\'')
return 0; /* break if we are in a comment */
while (isspace (*pos) || *pos == ',')
pos++;
if (*pos == '\'')
return 0; /* break if we are in a comment */
vStringClear (name);
for (; *pos && !isspace (*pos) && *pos != '(' && *pos != ',' && *pos != '='; pos++)
vStringPut (name, *pos);
vStringTerminate (name);
makeSimpleTag (name, BasicKinds, kind);
}
vStringDelete (name);
return 1;
}
/* Match the name of a tag (function, variable, type, ...) starting at pos. */
static char const *extract_name (char const *pos, vString * name)
{
while (isspace (*pos))
pos++;
vStringClear (name);
for (; *pos && !isspace (*pos) && *pos != '(' && *pos != ',' && *pos != '='; pos++)
vStringPut (name, *pos);
vStringTerminate (name);
return pos;
}
/* Match a keyword starting at p (case insensitive). */
static int match_keyword (const char *p, KeyWord const *kw)
{
vString *name;
size_t i;
int j;
for (i = 0; i < strlen (kw->token); i++)
{
if (tolower (p[i]) != kw->token[i])
return 0;
}
name = vStringNew ();
p += i;
if (kw == &freebasic_keywords[0] ||
kw == &freebasic_keywords[1] ||
kw == &freebasic_keywords[2])
return extract_dim (p, name, kw->kind); /* extract_dim adds the found tag(s) */
for (j = 0; j < 1; j++)
{
p = extract_name (p, name);
}
makeSimpleTag (name, BasicKinds, kw->kind);
vStringDelete (name);
return 1;
}
/* Match a "label:" style label. */
static void match_colon_label (char const *p)
{
char const *end = p + strlen (p) - 1;
while (isspace (*end))
end--;
if (*end == ':')
{
vString *name = vStringNew ();
vStringNCatS (name, p, end - p);
makeSimpleTag (name, BasicKinds, K_LABEL);
vStringDelete (name);
}
}
static void findBasicTags (void)
{
const char *line;
KeyWord *keywords;
keywords = freebasic_keywords;
while ((line = (const char *) fileReadLine ()) != NULL)
{
const char *p = line;
KeyWord const *kw;
while (isspace (*p))
p++;
/* Empty line? */
if (!*p)
continue;
/* In Basic, keywords always are at the start of the line. */
for (kw = keywords; kw->token; kw++)
if (match_keyword (p, kw)) break;
/* Is it a label? */
match_colon_label (p);
}
}
parserDefinition *FreeBasicParser (void)
{
static char const *extensions[] = { "bas", "bi", "bb", "pb", NULL };
parserDefinition *def = parserNew ("FreeBasic");
def->kinds = BasicKinds;
def->kindCount = KIND_COUNT (BasicKinds);
def->extensions = extensions;
def->parser = findBasicTags;
return def;
}
/* vi:set tabstop=4 shiftwidth=4: */
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