From: Wolfgang Bumiller <wolfgang.linux@bumiller.com>
Date: Thu, 19 Jul 2012 16:14:25 +0000 (+0200)
Subject: merging master, and adapting
X-Git-Tag: 0.1-rc1~424
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=02b4c7b7c1639af8666f9a093d6dc4f6ac30e0f4;p=xonotic%2Fgmqcc.git

merging master, and adapting
---

02b4c7b7c1639af8666f9a093d6dc4f6ac30e0f4
diff --cc parser.c
index a59efe4,0000000..125a693
mode 100644,000000..100644
--- a/parser.c
+++ b/parser.c
@@@ -1,332 -1,0 +1,332 @@@
 +#include <stdio.h>
 +#include <stdarg.h>
 +
 +#include "gmqcc.h"
 +#include "lexer.h"
 +
 +typedef struct {
 +    lex_file *lex;
 +    int      tok;
 +
 +    MEM_VECTOR_MAKE(ast_value*, globals);
 +    MEM_VECTOR_MAKE(ast_function*, functions);
 +} parser_t;
 +
 +MEM_VEC_FUNCTIONS(parser_t, ast_value*, globals)
 +MEM_VEC_FUNCTIONS(parser_t, ast_function*, functions)
 +
 +void parseerror(parser_t *parser, const char *fmt, ...)
 +{
 +	va_list ap;
 +
 +    if (parser)
 +	    printf("error %s:%lu: ", parser->lex->tok->ctx.file, (unsigned long)parser->lex->tok->ctx.line);
 +	else
 +	    printf("error: ");
 +
 +	va_start(ap, fmt);
 +	vprintf(fmt, ap);
 +	va_end(ap);
 +
 +	printf("\n");
 +}
 +
 +bool parser_next(parser_t *parser)
 +{
 +    /* lex_do kills the previous token */
 +    parser->tok = lex_do(parser->lex);
 +    if (parser->tok == TOKEN_EOF || parser->tok >= TOKEN_ERROR)
 +        return false;
 +    return true;
 +}
 +
 +/* lift a token out of the parser so it's not destroyed by parser_next */
 +token *parser_lift(parser_t *parser)
 +{
 +    token *tok = parser->lex->tok;
 +    parser->lex->tok = NULL;
 +    return tok;
 +}
 +
 +#define parser_tokval(p) (p->lex->tok->value)
 +#define parser_token(p)  (p->lex->tok)
 +#define parser_ctx(p)    (p->lex->tok->ctx)
 +
 +ast_value* parser_find_global(parser_t *parser, const char *name)
 +{
 +    size_t i;
 +    for (i = 0; i < parser->globals_count; ++i) {
 +        if (!strcmp(parser->globals[i]->name, name))
 +            return parser->globals[i];
 +    }
 +    return NULL;
 +}
 +
 +typedef struct {
 +    MEM_VECTOR_MAKE(ast_value*, p);
 +} paramlist_t;
 +MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
 +
 +ast_value *parser_parse_type(parser_t *parser, bool *isfunc)
 +{
 +    paramlist_t params;
 +    ast_value *var;
 +    lex_ctx   ctx = parser_ctx(parser);
 +    int vtype = parser_token(parser)->constval.t;
 +
 +    MEM_VECTOR_INIT(&params, p);
 +
 +    *isfunc = false;
 +
 +    if (!parser_next(parser))
 +        return NULL;
 +
 +    if (parser->tok == '(') {
 +        *isfunc = true;
 +        while (true) {
 +            ast_value *param;
 +            bool dummy;
 +
 +            if (!parser_next(parser)) {
 +                MEM_VECTOR_CLEAR(&params, p);
 +                return NULL;
 +            }
 +
 +            param = parser_parse_type(parser, &dummy);
 +            (void)dummy;
 +
 +            if (!param) {
 +                MEM_VECTOR_CLEAR(&params, p);
 +                return NULL;
 +            }
 +
 +            if (!paramlist_t_p_add(&params, param)) {
 +                MEM_VECTOR_CLEAR(&params, p);
 +                parseerror(parser, "Out of memory while parsing typename");
 +                return NULL;
 +            }
 +
 +            if (parser->tok == ',')
 +                continue;
 +            if (parser->tok == ')')
 +                break;
 +            MEM_VECTOR_CLEAR(&params, p);
 +            parseerror(parser, "Unexpected token");
 +            return NULL;
 +        }
 +        if (!parser_next(parser)) {
 +            MEM_VECTOR_CLEAR(&params, p);
 +            return NULL;
 +        }
 +    }
 +
 +    var = ast_value_new(ctx, "<unnamed>", vtype);
 +    if (!var) {
 +        MEM_VECTOR_CLEAR(&params, p);
 +        return NULL;
 +    }
 +    MEM_VECTOR_MOVE(&params, p, var, params);
 +    return var;
 +}
 +
 +bool parser_do(parser_t *parser)
 +{
 +    if (parser->tok == TOKEN_TYPENAME)
 +    {
 +        bool isfunc = false;
 +        ast_function *func = NULL;
 +        lex_ctx ctx = parser_ctx(parser);
 +        ast_value *var = parser_parse_type(parser, &isfunc);
 +        if (!var)
 +            return false;
 +
 +        if (parser->tok != TOKEN_IDENT) {
 +            parseerror(parser, "expected variable name\n");
 +            return false;
 +        }
 +
 +        if (parser_find_global(parser, parser_tokval(parser))) {
 +            ast_value_delete(var);
 +            parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
 +            return false;
 +        }
 +
 +        if (!ast_value_set_name(var, parser_tokval(parser))) {
 +            parseerror(parser, "failed to set variable name\n");
 +            ast_value_delete(var);
 +            return false;
 +        }
 +
 +        if (isfunc) {
 +            /* a function was defined */
 +            ast_value *fval;
 +
 +            /* turn var into a value of TYPE_FUNCTION, with the old var
 +             * as return type
 +             */
 +            fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
 +            func = ast_function_new(ctx, var->name, fval);
 +            if (!fval || !func) {
 +                ast_value_delete(var);
 +                if (fval) ast_value_delete(fval);
 +                if (func) ast_function_delete(func);
 +                return false;
 +            }
 +
 +            fval->expression.next = (ast_expression*)var;
-             MEM_VECTOR_MOVE(var, params, func, params);
++            MEM_VECTOR_MOVE(var, params, fval, params);
 +
 +            if (!parser_t_functions_add(parser, func)) {
 +                ast_value_delete(var);
 +                if (fval) ast_value_delete(fval);
 +                if (func) ast_function_delete(func);
 +                return false;
 +            }
 +
 +            var = fval;
 +        }
 +
 +        if (!parser_t_globals_add(parser, var) ||
 +            !parser_next(parser))
 +        {
 +            ast_value_delete(var);
 +            return false;
 +        }
 +
 +        if (parser->tok == ';') {
 +            if (!parser_next(parser))
 +                return parser->tok == TOKEN_EOF;
 +            return true;
 +        }
 +
 +        if (parser->tok != '=') {
 +            parseerror(parser, "expected '=' or ';'");
 +            return false;
 +        }
 +
 +        if (!parser_next(parser))
 +            return false;
 +
 +        if (parser->tok == '#') {
 +            if (!isfunc || !func) {
 +                parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
 +                return false;
 +            }
 +            if (!parser_next(parser)) {
 +                parseerror(parser, "expected builtin number");
 +                return false;
 +            }
 +            if (parser->tok != TOKEN_INTCONST) {
 +                parseerror(parser, "builtin number must be an integer constant");
 +                return false;
 +            }
 +            if (parser_token(parser)->constval.i <= 0) {
 +                parseerror(parser, "builtin number must be positive integer greater than zero");
 +                return false;
 +            }
 +
 +            func->builtin = -parser_token(parser)->constval.i;
 +        } else if (parser->tok == '{') {
 +            /* function body */
 +        } else {
 +            parseerror(parser, "TODO, const assignment");
 +        }
 +
 +        if (!parser_next(parser))
 +            return false;
 +
 +        if (parser->tok != ';') {
 +            parseerror(parser, "expected semicolon");
 +            return false;
 +        }
 +
 +        return true;
 +    }
 +    else if (parser->tok == TOKEN_KEYWORD)
 +    {
 +        /* handle 'var' and 'const' */
 +        return false;
 +    }
 +    else if (parser->tok == '.')
 +    {
 +        /* entity-member declaration */
 +        return false;
 +    }
 +    else
 +    {
 +        parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
 +        return false;
 +    }
 +    return true;
 +}
 +
 +bool parser_compile(const char *filename)
 +{
 +    size_t i;
 +    parser_t *parser;
 +    ir_builder *ir;
 +
 +    parser = (parser_t*)mem_a(sizeof(parser_t));
 +    if (!parser)
 +        return false;
 +
 +    MEM_VECTOR_INIT(parser, globals);
 +    parser->lex = lex_open(filename);
 +
 +    if (!parser->lex) {
 +        printf("failed to open file \"%s\"\n", filename);
 +        return false;
 +    }
 +
 +    /* initial lexer/parser state */
 +    parser->lex->flags.noops = true;
 +
 +    if (parser_next(parser))
 +    {
 +        while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
 +        {
 +            if (!parser_do(parser)) {
 +                if (parser->tok == TOKEN_EOF)
 +                    parseerror(parser, "unexpected eof");
 +                else
 +                    parseerror(parser, "parse error\n");
 +                lex_close(parser->lex);
 +                mem_d(parser);
 +                return false;
 +            }
 +        }
 +    }
 +
 +    lex_close(parser->lex);
 +
 +    ir = ir_builder_new("gmqcc_out");
 +    if (!ir) {
 +        printf("failed to allocate builder\n");
 +        goto cleanup;
 +    }
 +
 +    for (i = 0; i < parser->globals_count; ++i) {
 +        if (!ast_global_codegen(parser->globals[i], ir)) {
 +            printf("failed to generate global %s\n", parser->globals[i]->name);
 +        }
 +    }
 +    for (i = 0; i < parser->functions_count; ++i) {
 +        if (!ast_function_codegen(parser->functions[i], ir)) {
 +            printf("failed to generate function %s\n", parser->functions[i]->name);
 +        }
 +        if (!ir_function_finalize(parser->functions[i]->ir_func)) {
 +            printf("failed to finalize function %s\n", parser->functions[i]->name);
 +        }
 +    }
 +
 +    ir_builder_dump(ir, printf);
 +
 +cleanup:
 +    for (i = 0; i < parser->globals_count; ++i) {
 +        ast_value_delete(parser->globals[i]);
 +    }
 +    MEM_VECTOR_CLEAR(parser, globals);
 +
 +    mem_d(parser);
 +    return true;
 +}