mirror of
https://github.com/DarkPlacesEngine/gmqcc.git
synced 2024-11-24 04:41:25 +00:00
283 lines
15 KiB
C
283 lines
15 KiB
C
/*
|
|
* Copyright (C) 2012
|
|
* Dale Weiler
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
* this software and associated documentation files (the "Software"), to deal in
|
|
* the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
* of the Software, and to permit persons to whom the Software is furnished to do
|
|
* so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include "gmqcc.h"
|
|
|
|
/* compile-time constant for type constants */
|
|
typedef struct {
|
|
char *name;
|
|
int type;
|
|
float value[3];
|
|
char *string; /* string value if constant is string literal */
|
|
} constant;
|
|
VECTOR_MAKE(constant, compile_constants);
|
|
|
|
/*
|
|
* Generates a parse tree out of the lexees generated by the lexer. This
|
|
* is where the tree is built. This is where valid check is performed.
|
|
*/
|
|
int parse_gen(struct lex_file *file) {
|
|
int token = 0;
|
|
while ((token = lex_token(file)) != ERROR_LEX && \
|
|
token != ERROR_COMPILER && \
|
|
token != ERROR_INTERNAL && \
|
|
token != ERROR_PARSE && \
|
|
token != ERROR_PREPRO && file->length >= 0) {
|
|
switch (token) {
|
|
case TOKEN_TYPEDEF: {
|
|
char *f; /* from */
|
|
char *t; /* to */
|
|
|
|
token = lex_token(file);
|
|
token = lex_token(file); f = util_strdup(file->lastok);
|
|
token = lex_token(file);
|
|
token = lex_token(file); t = util_strdup(file->lastok);
|
|
|
|
typedef_add(f, t);
|
|
mem_d(f);
|
|
mem_d(t);
|
|
|
|
token = lex_token(file);
|
|
if (token == ' ')
|
|
token = lex_token(file);
|
|
|
|
if (token != ';')
|
|
error(ERROR_PARSE, "%s:%d Expected a `;` at end of typedef statement\n", file->name, file->line);
|
|
|
|
token = lex_token(file);
|
|
break;
|
|
}
|
|
|
|
case TOKEN_VOID: goto fall;
|
|
case TOKEN_STRING: goto fall;
|
|
case TOKEN_VECTOR: goto fall;
|
|
case TOKEN_ENTITY: goto fall;
|
|
case TOKEN_FLOAT: goto fall;
|
|
{
|
|
fall:;
|
|
char *name = NULL;
|
|
int type = token; /* story copy */
|
|
|
|
/* skip over space */
|
|
token = lex_token(file);
|
|
if (token == ' ')
|
|
token = lex_token(file);
|
|
|
|
/* save name */
|
|
name = util_strdup(file->lastok);
|
|
|
|
/* skip spaces */
|
|
token = lex_token(file);
|
|
if (token == ' ')
|
|
token = lex_token(file);
|
|
|
|
if (token == ';') {
|
|
/*
|
|
* Definitions go to the defs table, they don't have
|
|
* any sort of data with them yet.
|
|
*/
|
|
} else if (token == '=') {
|
|
token = lex_token(file);
|
|
if (token == ' ')
|
|
token = lex_token(file);
|
|
|
|
/* strings are in file->lastok */
|
|
switch (type) {
|
|
case TOKEN_VOID:
|
|
return error(ERROR_PARSE, "%s:%d Cannot assign value to type void\n", file->name, file->line);
|
|
|
|
/* TODO: Validate (end quote), strip quotes for constant add, name constant */
|
|
case TOKEN_STRING:
|
|
if (*file->lastok != '"')
|
|
error(ERROR_PARSE, "%s:%d Expected a '\"' (quote) for string constant\n", file->name, file->line);
|
|
/* add the compile-time constant */
|
|
compile_constants_add((constant){
|
|
.name = util_strdup(name),
|
|
.type = TYPE_STRING,
|
|
.value = {0,0,0},
|
|
.string = util_strdup(file->lastok)
|
|
});
|
|
break;
|
|
/* TODO: name constant, old qc vec literals, whitespace fixes, name constant */
|
|
case TOKEN_VECTOR: {
|
|
float compile_calc_x = 0;
|
|
float compile_calc_y = 0;
|
|
float compile_calc_z = 0;
|
|
int compile_calc_d = 0; /* dot? */
|
|
int compile_calc_s = 0; /* sign (-, +) */
|
|
|
|
char compile_data[1024];
|
|
char *compile_eval = compile_data;
|
|
|
|
if (token != '{')
|
|
error(ERROR_PARSE, "%s:%d Expected initializer list `{`,`}` for vector constant\n", file->name, file->line);
|
|
|
|
/*
|
|
* This parses a single vector element: x,y & z. This will handle all the
|
|
* complicated mechanics of a vector, and can be extended as well. This
|
|
* is a rather large macro, and is #undef'd after it's use below.
|
|
*/
|
|
#define PARSE_VEC_ELEMENT(NAME, BIT) \
|
|
token = lex_token(file); \
|
|
if (token == ' ') \
|
|
token = lex_token(file); \
|
|
if (token == '.') \
|
|
compile_calc_d = 1; \
|
|
if (!isdigit(token) && !compile_calc_d && token != '+' && token != '-') \
|
|
error(ERROR_PARSE,"%s:%d Invalid constant initializer element %c for vector, must be numeric\n", file->name, file->line, NAME); \
|
|
if (token == '+') \
|
|
compile_calc_s = '+'; \
|
|
if (token == '-' && !compile_calc_s) \
|
|
compile_calc_s = '-'; \
|
|
while (isdigit(token) || token == '.' || token == '+' || token == '-') { \
|
|
*compile_eval++ = token; \
|
|
token = lex_token(file); \
|
|
if (token == '.' && compile_calc_d) { \
|
|
error(ERROR_PARSE, "%s:%d Invalid constant initializer element %c for vector, must be numeric.\n", file->name, file->line, NAME); \
|
|
token = lex_token(file); \
|
|
} \
|
|
if ((token == '-' || token == '+') && compile_calc_s) { \
|
|
error(ERROR_PARSE, "%s:%d Invalid constant initializer sign for vector element %c\n", file->name, file->line, NAME); \
|
|
token = lex_token(file); \
|
|
} \
|
|
else if (token == '.' && !compile_calc_d) \
|
|
compile_calc_d = 1; \
|
|
else if (token == '-' && !compile_calc_s) \
|
|
compile_calc_s = '-'; \
|
|
else if (token == '+' && !compile_calc_s) \
|
|
compile_calc_s = '+'; \
|
|
} \
|
|
if (token == ' ') \
|
|
token = lex_token(file); \
|
|
if (NAME != 'z') { \
|
|
if (token != ',' && token != ' ') \
|
|
error(ERROR_PARSE, "%s:%d invalid constant initializer element %c for vector (missing spaces, or comma delimited list?)\n", file->name, file->line, NAME); \
|
|
} else if (token != '}') { \
|
|
error(ERROR_PARSE, "%s:%d Expected `}` on end of constant initialization for vector\n", file->name, file->line); \
|
|
} \
|
|
compile_calc_##BIT = atof(compile_data); \
|
|
compile_calc_d = 0; \
|
|
compile_calc_s = 0; \
|
|
compile_eval = &compile_data[0]; \
|
|
memset(compile_data, 0, sizeof(compile_data))
|
|
|
|
/*
|
|
* Parse all elements using the macro above.
|
|
* We must undef the macro afterwards.
|
|
*/
|
|
PARSE_VEC_ELEMENT('x', x);
|
|
PARSE_VEC_ELEMENT('y', y);
|
|
PARSE_VEC_ELEMENT('z', z);
|
|
#undef PARSE_VEC_ELEMENT
|
|
|
|
/* Check for the semi-colon... */
|
|
token = lex_token(file);
|
|
if (token == ' ')
|
|
token = lex_token(file);
|
|
if (token != ';')
|
|
error(ERROR_PARSE, "%s:%d Expected `;` on end of constant initialization for vector\n", file->name, file->line);
|
|
|
|
/* add the compile-time constant */
|
|
compile_constants_add((constant){
|
|
.name = util_strdup(name),
|
|
.type = TYPE_VECTOR,
|
|
.value = {
|
|
[0] = compile_calc_x,
|
|
[1] = compile_calc_y,
|
|
[2] = compile_calc_z
|
|
},
|
|
.string = NULL
|
|
});
|
|
break;
|
|
}
|
|
|
|
case TOKEN_ENTITY:
|
|
case TOKEN_FLOAT: /*TODO: validate, constant generation, name constant */
|
|
if (!isdigit(token))
|
|
error(ERROR_PARSE, "%s:%d Expected numeric constant for float constant\n");
|
|
compile_constants_add((constant){
|
|
.name = util_strdup(name),
|
|
.type = TOKEN_FLOAT,
|
|
.value = {0,0,0},
|
|
.string = NULL
|
|
});
|
|
break;
|
|
}
|
|
} else if (token == '(') {
|
|
printf("FUNCTION ??\n");
|
|
}
|
|
mem_d(name);
|
|
}
|
|
|
|
/*
|
|
* From here down is all language punctuation: There is no
|
|
* need to actual create tokens from these because they're already
|
|
* tokenized as these individual tokens (which are in a special area
|
|
* of the ascii table which doesn't conflict with our other tokens
|
|
* which are higer than the ascii table.)
|
|
*/
|
|
case '#':
|
|
token = lex_token(file); /* skip '#' */
|
|
if (token == ' ')
|
|
token = lex_token(file);
|
|
/*
|
|
* If we make it here we found a directive, the supported
|
|
* directives so far are #include.
|
|
*/
|
|
if (strncmp(file->lastok, "include", sizeof("include")) == 0) {
|
|
/*
|
|
* We only suport include " ", not <> like in C (why?)
|
|
* because the latter is silly.
|
|
*/
|
|
while (*file->lastok != '"' && token != '\n')
|
|
token = lex_token(file);
|
|
if (token == '\n')
|
|
return error(ERROR_PARSE, "%d: Invalid use of include preprocessor directive: wanted #include \"file.h\"\n", file->line-1);
|
|
|
|
char *copy = util_strdup(file->lastok);
|
|
struct lex_file *next = lex_include(file, copy);
|
|
|
|
if (!next) {
|
|
error(ERROR_INTERNAL, "Include subsystem failure\n");
|
|
exit (-1);
|
|
}
|
|
parse_gen(next);
|
|
mem_d (copy);
|
|
lex_close(next);
|
|
}
|
|
/* skip all tokens to end of directive */
|
|
while (token != '\n')
|
|
token = lex_token(file);
|
|
break;
|
|
|
|
case LEX_IDENT:
|
|
token = lex_token(file);
|
|
break;
|
|
}
|
|
}
|
|
lex_reset(file);
|
|
return 1;
|
|
}
|