/*
- * Copyright (C) 2012
- * Dale Weiler
+ * 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
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
-#include <limits.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);
-static const char *const parse_punct[] = {
- "&&", "||", "<=", ">=", "==", "!=", ";", ",", "!", "*",
- "/" , "(" , "-" , "+" , "=" , "[" , "]", "{", "}", "...",
- "." , "<" , ">" , "#" , "&" , "|" , "$", "@", ":", NULL
- /*
- * $,@,: are extensions:
- * $ is a shorter `self`, so instead of self.frags, $.frags
- * @ is a constructor
- * : is compiler builtin functions
- */
-};
-
-int parse(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_IF:
- token = lex_token(file);
- while ((token == ' ' || token == '\n') && file->length >= 0)
- token = lex_token(file);
-
- if (token != '(')
- error(ERROR_PARSE, "Expected `(` after if\n", "");
- break;
-
- /* TODO: Preprocessor */
- case '#':
- token = lex_token(file);
- token = lex_token(file);
- token = lex_token(file);
- token = lex_token(file);
- token = lex_token(file);
- token = lex_token(file);
- break;
-
- /* PUNCTUATION PARSING BEGINS */
- case '&': /* & */
- token = lex_token(file);
- if (token == '&') { /* && */
- token = lex_token(file);
- printf("--> LOGICAL AND\n");
- goto end;
- }
- printf("--> BITWISE AND\n");
- break;
- case '|': /* | */
- token = lex_token(file);
- if (token == '|') { /* || */
- token = lex_token(file);
- printf("--> LOGICAL OR\n");
- goto end;
- }
- printf("--> BITWISE OR\n");
- break;
- case '!':
- token = lex_token(file);
- if (token == '=') { /* != */
- token = lex_token(file);
- printf("--> LOGICAL NOT EQUAL\n");
- goto end;
- }
- printf("--> LOGICAL NOT\n");
- break;
- case '<': /* < */
- token = lex_token(file);
- if (token == '=') { /* <= */
- token = lex_token(file);
- printf("--> LESS THAN OR EQUALL\n");
- goto end;
- }
- printf("--> LESS THAN\n");
- break;
- case '>': /* > */
- token = lex_token(file);
- if (token == '=') { /* >= */
- token = lex_token(file);
- printf("--> GREATER THAN OR EQUAL\n");
- goto end;
- }
- printf("--> GREATER THAN\n");
- break;
- case '=':
- token = lex_token(file);
- if (token == '=') { /* == */
- token = lex_token(file);
- printf("--> COMPARISION \n");
- goto end;
- }
- printf("--> ASSIGNMENT\n");
- break;
- case ';':
- token = lex_token(file);
- printf("--> FINISHED STATMENT\n");
- break;
- case '-':
- token = lex_token(file);
- printf("--> SUBTRACTION EXPRESSION\n");
- break;
- case '+':
- token = lex_token(file);
- printf("--> ASSIGNMENT EXPRRESSION\n");
- break;
+void compile_constant_debug() {
+ int iter = 0;
+ for(; iter < compile_constants_elements; iter++) {
+ constant *c = &compile_constants_data[iter];
+ switch(c->type) {
+ case TYPE_FLOAT: printf("constant: %s FLOAT %f\n", c->name, c->value[0]); break;
+ case TYPE_VECTOR: printf("constant: %s VECTOR {%f,%f,%f}\n",c->name, c->value[0], c->value[1], c->value[2]); break;
+ case TYPE_STRING: printf("constant: %s STRING %s\n", c->name, c->string); break;
+ case TYPE_VOID: printf("constant: %s VOID %s\n", c->name, c->string); break;
+ }
+ }
+}
+
+/*
+ * 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(lex_file *file) {
+ int token = 0;
+ while ((token = lex_token(file)) != ERROR_LEX && 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(file, f, t);
+ mem_d(f);
+ mem_d(t);
+
+ token = lex_token(file);
+ if (token == ' ')
+ token = lex_token(file);
+
+ if (token != ';')
+ error(file, ERROR_PARSE, "Expected a `;` at end of typedef statement");
+
+ 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:
+ error(file, ERROR_PARSE, "Cannot assign value to type void\n");
+
+ /* TODO: Validate (end quote), strip quotes for constant add, name constant */
+ case TOKEN_STRING:
+ if (*file->lastok != '"')
+ error(file, ERROR_PARSE, "Expected a '\"' (quote) for string constant\n");
+ /* 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(file, ERROR_PARSE, "Expected initializer list {} for vector constant\n");
+
+ /*
+ * 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(file, ERROR_PARSE,"Invalid constant initializer element %c for vector, must be numeric\n", 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(file, ERROR_PARSE, "Invalid constant initializer element %c for vector, must be numeric.\n", NAME); \
+ token = lex_token(file); \
+ } \
+ if ((token == '-' || token == '+') && compile_calc_s) { \
+ error(file, ERROR_PARSE, "Invalid constant initializer sign for vector element %c\n", 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(file, ERROR_PARSE, "invalid constant initializer element %c for vector (missing spaces, or comma delimited list?)\n", NAME); \
+ } else if (token != '}') { \
+ error(file, ERROR_PARSE, "Expected `}` on end of constant initialization for vector\n"); \
+ } \
+ 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(file, ERROR_PARSE, "Expected `;` on end of constant initialization for vector\n");
+
+ /* 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(file, ERROR_PARSE, "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(file, ERROR_PARSE, "Invalid use of include preprocessor directive: wanted #include \"file.h\"\n");
+
+ char *copy = util_strdup(file->lastok);
+ lex_file *next = lex_include(file, copy);
+
+ if (!next) {
+ error(file, ERROR_INTERNAL, "Include subsystem failure\n");
+ exit (-1);
+ }
+ compile_constants_add((constant) {
+ .name = "#include",
+ .type = TYPE_VOID,
+ .value = {0,0,0},
+ .string = copy
+ });
+ 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;
+ }
+ }
+ compile_constant_debug();
+ lex_reset(file);
+ /* free constants */
+ {
+ size_t i = 0;
+ for (; i < compile_constants_elements; i++) {
+ mem_d(compile_constants_data[i].name);
+ mem_d(compile_constants_data[i].string);
}
- end:;
+ mem_d(compile_constants_data);
}
- lex_reset(file);
-
- // "&&", "||", "<=", ">=", "==", "!=", ";", ",", "!", "*",
- //"/" , "(" , "-" , "+" , "=" , "[" , "]", "{", "}", "...",
- //"." , "<" , ">" , "#" , "&" , "|" , "$", "@", ":", NULL
-
- return 1;
-}
+ return 1;
+}
projects / xonotic / gmqcc.git / blobdiff