More assembler code

This commit is contained in:
Dale Weiler 2012-04-27 16:45:34 -04:00
parent 7aee8ac2ef
commit 20f203495d
3 changed files with 47 additions and 10 deletions

52
asm.c
View file

@ -78,22 +78,58 @@ void asm_clear() {
mem_d(assembly_constants_data);
}
/*
* 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) {
if (strstr(skip, "FLOAT:") == &skip[0]) { return true; }
if (strstr(skip, "VECTOR:") == &skip[0]) { return true; }
if (strstr(skip, "ENTITY:") == &skip[0]) { return true; }
if (strstr(skip, "FIELD:") == &skip[0]) { return true; }
if (strstr(skip, "STRING:") == &skip[0]) { return true; }
return false;
}
/*
* Parses a function: trivial case, handles occurances of duplicated
* 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]))
return false;
if (strstr(skip, "FUNCTION:") == &skip[0]) {
*state = ASM_FUNCTION; /* update state */
/* TODO */
return true;
}
return false;
}
void asm_parse(FILE *fp) {
char *data = NULL;
char *skip = NULL;
long line = 1; /* current line */
size_t size = 0; /* size of line */
asm_state state = ASM_NULL;
while ((data = asm_getline(&size, fp)) != NULL) {
data = util_strsws(data); /* skip whitespace */
data = util_strrnl(data); /* delete newline */
#define asm_end(x) do { mem_d(data); line++; printf(x); } while (0); continue
while ((data = asm_getline (&size, fp)) != NULL) {
data = util_strsws(data,&skip); /* skip whitespace */
data = util_strrnl(data); /* delete newline */
/* parse type */
if(asm_parse_type(skip, line, &state)){ asm_end(""); }
/* parse func */
if(asm_parse_func(skip, line, &state)){ asm_end(""); }
/* TODO: everything */
(void)state;
goto end;
end:
mem_d(data);
line ++;
}
asm_clear();
}

View file

@ -197,7 +197,7 @@ void util_meminfo ();
char *util_strdup (const char *);
char *util_strrq (char *);
char *util_strrnl (char *);
char *util_strsws (char *);
char *util_strsws (char *, char **);
void util_debug (const char *, const char *, ...);
int util_getline (char **, size_t *, FILE *);
void util_endianswap (void *, int, int);

3
util.c
View file

@ -137,13 +137,14 @@ char *util_strrnl(char *src) {
* skipping past it, and stroing the skip distance, so
* the string can later be freed (if it was allocated)
*/
char *util_strsws(char *skip) {
char *util_strsws(char *skip, char **move) {
size_t size = 0;
if (!skip)
return NULL;
while (*skip == ' ' || *skip == '\t')
skip++,size++;
*move = skip;
return skip-size;
}