//parser
cellpoint read_parse(char *ibuf, char **pscan)
{
current_state = STATE_INIT;
stack_init(&parser_stack);
stack_init(&state_stack);
while (*pscan == NULL || **pscan == '\0'){
*pscan = reload_ibuffer(ibuf);
}
while (1){
if (current_state == STATE_INIT && !stack_is_empty(&parser_stack)){
//parses a object
return stack_pop(&parser_stack);
}
if (current_state == STATE_INIT){
do_state_init(ibuf, pscan);
}else if (current_state == STATE_SHARP){
do_state_sharp(ibuf, pscan);
}else if (current_state == STATE_DOT){
do_state_dot(pscan);
}else if (current_state == STATE_ADD){
do_state_add(pscan);
}else if (current_state == STATE_SUB){
do_state_sub(pscan);
}else if (current_state == STATE_NUM){
//parses number object
parse_num(pscan);
}else if (current_state == STATE_CHAR){
//parses character object
parse_char(pscan);
}else if (current_state == STATE_STR){
//parses string object
parse_string(ibuf, pscan);
}else if (current_state == STATE_SYM){
//parses symbol object
parse_sym(pscan);
}else if (current_state == STATE_LIST){
//parses list object
parse_list(ibuf, pscan);
}else if (current_state == STATE_VEC){
//parses vector object
parse_vector(ibuf, pscan);
}else {
perror("Error: Bad state. -- READ\n");
error_handler();
return NIL;
}
}
}
object_t *parse_sexp(FILE *fp){
char buf;
buf=skip_space_getchar(fp);
ungetc(buf,fp);
if(isalpha(buf) || buf=='+' || buf=='*' || buf=='-'){
return parse_sym(fp);
}
else if(isdigit(buf)){
return parse_num(fp);
}
else if(buf=='('){
return parse_list(fp);
}
return (object_t*)NULL;
}
static int syms_load_syms(struct elf32_info *info, FILE *in,
Elf32_Shdr *s)
{
int len = s->sh_size / 16;
int i;
if (fseek(in, s->sh_offset, SEEK_SET) < 0) {
pr_error("elf32: can't seek to symbols");
return -1;
}
for (i = 0; i < len; i++) {
Elf32_Sym y;
int st;
const char *name;
if (parse_sym(&y, in) < 0) {
pr_error("elf32: error reading symbols");
return -1;
}
st = ELF32_ST_TYPE(y.st_info);
name = info->string_tab + y.st_name;
if (y.st_name > info->string_len) {
printc_err("elf32: symbol out of bounds\n");
return -1;
}
if (name[0] &&
(st == STT_OBJECT || st == STT_FUNC ||
st == STT_SECTION || st == STT_COMMON ||
st == STT_TLS) &&
stab_set(info->string_tab + y.st_name,
y.st_value) < 0)
return -1;
}
return 0;
}
