/*
- * Copyright (C) 2012
+ * Copyright (C) 2012
* Dale Weiler
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
typedef struct {
char *name; /* name of constant */
+ char type; /* type, float, vector, string */
+ char elem; /* 0=x, 1=y, or 2=Z? */
int offset; /* location in globals */
} globals;
VECTOR_MAKE(globals, assembly_constants);
mem_d(assembly_constants_data);
}
+/*
+ * Dumps all values of all constants and assembly related
+ * information obtained during the assembly procedure.
+ */
+void asm_dumps() {
+ size_t i = 0;
+ for (; i < assembly_constants_elements; i++) {
+ globals *g = &assembly_constants_data[i];
+ switch (g->type) {
+ case TYPE_VECTOR: {
+ util_debug("ASM", "vector %s %c[%f]\n", g->name,
+ (g->elem == 0) ? 'X' :(
+ (g->elem == 1) ? 'Y' :
+ (g->elem == 2) ? 'Z' :' '),
+ INT2FLT(code_globals_data[g->offset])
+ );
+ break;
+ }
+ }
+ }
+}
+
/*
* Parses a type, could be global or not depending on the
* assembly state: global scope with assignments are constants.
* globals with no assignments are globals. Function body types
* are locals.
*/
-static inline bool asm_parse_type(const char *skip, size_t line, asm_state *state) {
+static GMQCC_INLINE bool asm_parse_type(const char *skip, size_t line, asm_state *state) {
if (!(strstr(skip, "FLOAT:") == &skip[0]) &&
(strstr(skip, "VECTOR:") == &skip[0]) &&
(strstr(skip, "ENTITY:") == &skip[0]) &&
/* TODO: determine if constant, global, or local */
switch (*skip) {
/* VECTOR */ case 'V': {
- const char *find = skip + 7;
+ float val1;
+ float val2;
+ float val3;
+ globals global;
+
+ char *find = (char*)skip + 7;
+ char *name = (char*)skip + 7;
while (*find == ' ' || *find == '\t') find++;
- printf("found VECTOR %s\n", find);
+
+ /* constant? */
+ if (strchr(find, ',')) {
+ /* strip name */
+ *strchr((name = util_strdup(find)), ',')='\0';
+ /* find data */
+ find += strlen(name) + 1;
+ while (*find == ' ' || *find == '\t') find++;
+ /* valid name */
+ if (util_strupper(name) || isdigit(*name)) {
+ printf("invalid name for vector variable\n");
+ mem_d(name);
+ }
+ /*
+ * Parse all three elements of the vector. This will only
+ * pass the first try if we hit a constant, otherwise it's
+ * a global.
+ */
+ #define PARSE_ELEMENT(X,Y,Z) \
+ if (isdigit(*X) || *X == '-'||*X == '+') { \
+ bool negated = (*X == '-'); \
+ if (negated || *X == '+') { X++; } \
+ Y = (negated)?-atof(X):atof(X); \
+ X = strchr(X, ','); \
+ Z \
+ }
+
+ PARSE_ELEMENT(find, val1, { find ++; while (*find == ' ') { find ++; } });
+ PARSE_ELEMENT(find, val2, { find ++; while (*find == ' ') { find ++; } });
+ PARSE_ELEMENT(find, val3, { find ++; /* no need to do anything here */ });
+ #undef PARSE_ELEMENT
+ #define BUILD_ELEMENT(X,Y) \
+ global.type = TYPE_VECTOR; \
+ global.name = util_strdup(name); \
+ global.elem = (X); \
+ global.offset = code_globals_elements; \
+ assembly_constants_add(global); \
+ code_globals_add(FLT2INT(Y))
+ BUILD_ELEMENT(0, val1);
+ BUILD_ELEMENT(1, val2);
+ BUILD_ELEMENT(2, val3);
+ #undef BUILD_ELEMENT
+ mem_d(name);
+ } else {
+ /* TODO global not constant */
+ }
break;
}
/* ENTITY */ case 'E': {
break;
}
}
-
+
return false;
}
* names among other things. Ensures valid name as well, and even
* internal engine function selection.
*/
-static inline bool asm_parse_func(const char *skip, size_t line, asm_state *state) {
- if (*state == ASM_FUNCTION && (strstr(skip, "FUNCTION:") == &skip[0]))
+static GMQCC_INLINE bool asm_parse_func(const char *skip, size_t line, asm_state *state) {
+ if (*state == ASM_FUNCTION)
return false;
if (strstr(skip, "FUNCTION:") == &skip[0]) {
* to determine this.
*/
if (strchr(name, ',')) {
+ prog_section_function function;
+ prog_section_def def;
+
char *find = strchr(name, ',') + 1;
-
+
/* skip whitespace */
while (*find == ' ' || *find == '\t')
find++;
-
+
if (*find != '$') {
printf("expected $ for internal function selection, got %s instead\n", find);
mem_d(copy);
mem_d(name);
return false;
}
+ *strchr(name, ',')='\0';
+
/*
* Now add the following items to the code system:
* function
* global (optional)
* name
*/
- code_functions_add((prog_section_function){
- -atoi(find), /* needs to be negated */
- 0, 0, 0,
- .name = code_chars_elements,
- 0, 0,{0}
- });
- code_defs_add((prog_section_def){
- .type = TYPE_FUNCTION,
- .offset = code_globals_elements,
- .name = code_chars_elements
- });
- code_globals_add(code_chars_elements);
+ function.entry = -atoi(find);
+ function.firstlocal = 0;
+ function.profile = 0;
+ function.name = code_chars_elements;
+ function.file = 0;
+ function.nargs = 0;
+ def.type = TYPE_FUNCTION;
+ def.offset = code_globals_elements;
+ def.name = code_chars_elements;
+ code_functions_add(function);
+ code_defs_add (def);
+ code_globals_add (code_chars_elements);
+ code_chars_put (name, strlen(name));
+ code_chars_add ('\0');
- code_chars_put(name, strlen(name));
- code_chars_add('\0');
+ util_debug("ASM", "added internal function %s to function table\n", name);
/*
* Sanatize the numerical constant used to select the
* produce a valid constant that would lead to runtime problems.
*/
if (util_strdigit(find))
- printf("found internal function %s, -%d\n", name, atoi(find));
+ util_debug("ASM", "found internal function %s, -%d\n", name, atoi(find));
else
printf("invalid internal function identifier, must be all numeric\n");
-
+
} else {
- /* TODO: function bodies */
- }
+ /*
+ * The function isn't an internal one. Determine the name and
+ * amount of arguments the function accepts by searching for
+ * the `#` (pound sign).
+ */
+ int args = 0;
+ char *find = strchr(name, '#');
+ char *peek = find;
+
+ /*
+ * Code structures for filling after determining the correct
+ * information to add to the code write system.
+ */
+ prog_section_function function;
+ prog_section_def def;
+ if (find) {
+ find ++;
+
+ /* skip whitespace */
+ if (*find == ' ' || *find == '\t')
+ find++;
+
+ /*
+ * If the input is larger than eight, it's considered
+ * invalid and shouldn't be allowed. The QuakeC VM only
+ * allows a maximum of eight arguments.
+ */
+ if (strlen(find) > 1 || *find == '9') {
+ printf("invalid number of arguments, must be a valid number from 0-8\n");
+ mem_d(copy);
+ mem_d(name);
+ return false;
+ }
+
+ if (*find != '0') {
+ /*
+ * if we made it this far we have a valid number for the
+ * argument count, so fall through a switch statement and
+ * do it.
+ */
+ switch (*find) {
+ case '8': args++; case '7': args++;
+ case '6': args++; case '5': args++;
+ case '4': args++; case '3': args++;
+ case '2': args++; case '1': args++;
+ }
+ }
+ } else {
+ printf("missing number of argument count in function %s\n", name);
+ }
+ /* terminate name inspot */
+ *--peek='\0';
+
+ /*
+ * We got valid function structure information now. Lets add
+ * the function to the code writer function table.
+ */
+ function.entry = code_statements_elements;
+ function.firstlocal = 0;
+ function.profile = 0;
+ function.name = code_chars_elements;
+ function.file = 0;
+ function.nargs = args;
+ def.type = TYPE_FUNCTION;
+ def.offset = code_globals_elements;
+ def.name = code_chars_elements;
+ code_functions_add(function);
+ code_defs_add (def);
+ code_globals_add (code_chars_elements);
+ code_chars_put (name, strlen(name));
+ code_chars_add ('\0');
+ /* update assembly state */
+ *state = ASM_FUNCTION;
+ util_debug("ASM", "added context function %s to function table\n", name);
+ }
+
mem_d(copy);
mem_d(name);
return true;
return false;
}
+static GMQCC_INLINE bool asm_parse_stmt(const char *skip, size_t line, asm_state *state) {
+ /*
+ * This parses a valid statement in assembly and adds it to the code
+ * table to be wrote. This needs to handle correct checking of all
+ * statements to ensure the correct amount of operands are passed to
+ * the menomic. This must also check for valid function calls (ensure
+ * the names selected exist in the program scope) and ensure the correct
+ * CALL* is used (depending on the amount of arguments the function
+ * is expected to take)
+ */
+ char *c = (char*)skip;
+ prog_section_statement s;
+ size_t i = 0;
+
+ /*
+ * statements are only allowed when inside a function body
+ * otherwise the assembly is invalid.
+ */
+ if (*state != ASM_FUNCTION)
+ return false;
+
+ /*
+ * Skip any possible whitespace, it's not wanted we're searching
+ * for an instruction. TODO: recrusive decent parser skip on line
+ * entry instead of pre-op.
+ */
+ while (*skip == ' ' || *skip == '\t')
+ skip++;
+
+ for (; i < sizeof(asm_instr)/sizeof(*asm_instr); i++) {
+ /*
+ * Iterate all possible instructions and check if the selected
+ * instructure in the input stream `skip` is actually a valid
+ * instruction.
+ */
+ if (!strncmp(skip, asm_instr[i].m, asm_instr[i].l)) {
+ printf("found statement %s\n", asm_instr[i].m);
+ /*
+ * Parse the operands for `i` (the instruction). The order
+ * of asm_instr is in the order of the menomic encoding so
+ * `i` == menomic encoding.
+ */
+ s.opcode = i;
+ switch (asm_instr[i].o) {
+ /*
+ * Each instruction can have from 0-3 operands; and can
+ * be used with less or more operands depending on it's
+ * selected use.
+ *
+ * DONE for example can use either 0 operands, or 1 (to
+ * emulate the effect of RETURN)
+ *
+ * TODO: parse operands correctly figure out what it is
+ * that the assembly is trying to do, i.e string table
+ * lookup, function calls etc.
+ *
+ * This needs to have a fall state, we start from the
+ * end of the string and work backwards.
+ */
+ #define OPFILL(X) \
+ do { \
+ size_t w = 0; \
+ if (!(c = strrchr(c, ','))) { \
+ printf("error, expected more operands\n"); \
+ return false; \
+ } \
+ c++; \
+ w++; \
+ while (*c == ' ' || *c == '\t') { \
+ c++; \
+ w++; \
+ } \
+ X = (const char*)c; \
+ c -= w; \
+ *c = '\0'; \
+ c = (char*)skip; \
+ } while (0)
+
+ case 3: {
+ const char *data; OPFILL(data);
+ printf("OP3: %s\n", data);
+ s.o3.s1 = 0;
+ }
+ case 2: {
+ const char *data; OPFILL(data);
+ printf("OP2: %s\n", data);
+ s.o2.s1 = 0;
+ }
+ case 1: {
+ while (*c == ' ' || *c == '\t') c++;
+ c += asm_instr[i].l;
+ while (*c == ' ' || *c == '\t') c++;
+
+ printf("OP1: %s\n", c);
+ s.o1.s1 = 0;
+ }
+ #undef OPFILL
+ }
+ /* add the statement now */
+ code_statements_add(s);
+ }
+ }
+ return true;
+}
+
void asm_parse(FILE *fp) {
char *data = NULL;
char *skip = NULL;
line++; \
util_debug("ASM", x); \
} while (0); continue
-
+
while ((data = asm_getline (&size, fp)) != NULL) {
char *copy = util_strsws(data); /* skip whitespace */
skip = util_strrnl(copy); /* delete newline */
- /* parse type */
- if(asm_parse_type(skip, line, &state)){ asm_end("asm_parse_type\n"); }
- /* parse func */
- if(asm_parse_func(skip, line, &state)){ asm_end("asm_parse_func\n"); }
-
- /* statement closure */
- if (state == ASM_FUNCTION && (
- (strstr(skip, "DONE") == &skip[0])||
- (strstr(skip, "RETURN") == &skip[0]))) state = ASM_NULL;
-
- /* TODO: everything */
- (void)state;
- asm_end("asm_parse_end\n");
+ if (asm_parse_type(skip, line, &state)){ asm_end("asm_parse_type\n"); }
+ if (asm_parse_func(skip, line, &state)){ asm_end("asm_parse_func\n"); }
+ if (asm_parse_stmt(skip, line, &state)){ asm_end("asm_parse_stmt\n"); }
}
#undef asm_end
- asm_clear();
+ asm_dumps();
+ asm_clear();
}
projects / xonotic / gmqcc.git / blobdiff