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/*************************************************************************
* Copyright (C) 2010 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of Dimension. *
* *
* Dimension 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 3 of the License, or (at *
* your option) any later version. *
* *
* Dimension 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, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
dmnsn_astree *
dmnsn_parse(FILE *file, dmnsn_symbol_table *symtable)
{
const char *filename;
dmnsn_astnode *fnode = dmnsn_find_symbol(symtable, "__file__");
if (fnode && fnode->type == DMNSN_AST_STRING) {
filename = fnode->ptr;
} else {
filename = "<>";
dmnsn_declare_symbol(symtable, "__file__", dmnsn_new_ast_string(filename));
}
void *scanner;
dmnsn_astree *astree = dmnsn_new_array(sizeof(dmnsn_astnode));
dmnsn_yylex_init(&scanner);
dmnsn_yyset_in(file, scanner);
dmnsn_yyset_extra(NULL, scanner);
if (yyparse(filename, scanner, astree, symtable) != 0) {
dmnsn_delete_astree(astree);
astree = NULL;
}
dmnsn_yylex_destroy(scanner);
return astree;
}
const char *
dmnsn_token_string(dmnsn_token_type token_type)
{
#define TOKEN_SIZE 255
static char token[TOKEN_SIZE + 1];
unsigned int i = YYTRANSLATE(token_type);
if (i > YYNTOKENS) {
fprintf(stderr, "Warning: unrecognised token %d.\n", (int)token_type);
return "unrecognized-token";
}
/* Trim the quotation marks */
if (strlen(yytname[i]) - 1 >= TOKEN_SIZE) {
fprintf(stderr, "Warning: name of token %d too long.\n", (int)token_type);
return "unrepresentable-token";
}
strcpy(token, yytname[i] + 1);
token[strlen(token) - 1] = '\0';
return token;
#undef TOKEN_SIZE
}
const char *
dmnsn_astnode_string(dmnsn_astnode_type astnode_type)
{
switch (astnode_type) {
/* Macro to shorten this switch */
#define dmnsn_astnode_map(type, str) \
case type: \
return str;
dmnsn_astnode_map(DMNSN_AST_NONE, "none");
dmnsn_astnode_map(DMNSN_AST_ROTATION, "rotate");
dmnsn_astnode_map(DMNSN_AST_SCALE, "scale");
dmnsn_astnode_map(DMNSN_AST_TRANSLATION, "translate");
dmnsn_astnode_map(DMNSN_AST_CAMERA, "camera");
dmnsn_astnode_map(DMNSN_AST_PERSPECTIVE, "perspective");
dmnsn_astnode_map(DMNSN_AST_LOCATION, "location");
dmnsn_astnode_map(DMNSN_AST_RIGHT, "right");
dmnsn_astnode_map(DMNSN_AST_UP, "up");
dmnsn_astnode_map(DMNSN_AST_SKY, "sky");
dmnsn_astnode_map(DMNSN_AST_ANGLE, "angle");
dmnsn_astnode_map(DMNSN_AST_LOOK_AT, "look_at");
dmnsn_astnode_map(DMNSN_AST_DIRECTION, "direction");
dmnsn_astnode_map(DMNSN_AST_BACKGROUND, "background");
dmnsn_astnode_map(DMNSN_AST_BOX, "box");
dmnsn_astnode_map(DMNSN_AST_SPHERE, "sphere");
dmnsn_astnode_map(DMNSN_AST_LIGHT_SOURCE, "light_source");
dmnsn_astnode_map(DMNSN_AST_OBJECT_MODIFIERS, "object-modifiers");
dmnsn_astnode_map(DMNSN_AST_TEXTURE, "texture");
dmnsn_astnode_map(DMNSN_AST_PIGMENT, "pigment");
dmnsn_astnode_map(DMNSN_AST_FINISH, "finish");
dmnsn_astnode_map(DMNSN_AST_AMBIENT, "ambient");
dmnsn_astnode_map(DMNSN_AST_DIFFUSE, "diffuse");
dmnsn_astnode_map(DMNSN_AST_PHONG, "phong");
dmnsn_astnode_map(DMNSN_AST_PHONG_SIZE, "phong_size");
dmnsn_astnode_map(DMNSN_AST_REFLECTION, "reflection");
dmnsn_astnode_map(DMNSN_AST_REFLECTION_ITEMS, "reflection-items");
dmnsn_astnode_map(DMNSN_AST_FALLOFF, "falloff");
dmnsn_astnode_map(DMNSN_AST_FLOAT, "float");
dmnsn_astnode_map(DMNSN_AST_INTEGER, "integer");
dmnsn_astnode_map(DMNSN_AST_VECTOR, "vector");
dmnsn_astnode_map(DMNSN_AST_ADD, "+");
dmnsn_astnode_map(DMNSN_AST_SUB, "-");
dmnsn_astnode_map(DMNSN_AST_MUL, "*");
dmnsn_astnode_map(DMNSN_AST_DIV, "/");
dmnsn_astnode_map(DMNSN_AST_EQUAL, "=" );
dmnsn_astnode_map(DMNSN_AST_NOT_EQUAL, "!=");
dmnsn_astnode_map(DMNSN_AST_LESS, "<" );
dmnsn_astnode_map(DMNSN_AST_LESS_EQUAL, "<=");
dmnsn_astnode_map(DMNSN_AST_GREATER, ">" );
dmnsn_astnode_map(DMNSN_AST_GREATER_EQUAL, ">=");
dmnsn_astnode_map(DMNSN_AST_AND, "&" );
dmnsn_astnode_map(DMNSN_AST_OR, "|" );
dmnsn_astnode_map(DMNSN_AST_NEGATE, "-");
dmnsn_astnode_map(DMNSN_AST_DOT_X, ".x");
dmnsn_astnode_map(DMNSN_AST_DOT_Y, ".y");
dmnsn_astnode_map(DMNSN_AST_DOT_Z, ".z");
dmnsn_astnode_map(DMNSN_AST_DOT_T, ".t");
dmnsn_astnode_map(DMNSN_AST_DOT_TRANSMIT, ".transmit");
dmnsn_astnode_map(DMNSN_AST_COLOR, "color");
dmnsn_astnode_map(DMNSN_AST_IDENTIFIER, "identifier");
dmnsn_astnode_map(DMNSN_AST_STRING, "string");
default:
fprintf(stderr, "Warning: unrecognised astnode type %d.\n",
(int)astnode_type);
return "unrecognized-astnode";
}
}
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