char *eval (const char *expr)
{
char result[256], *expr_value;
int value;
int session = StartSPASMErrorSession();
bool fResult = parse_num (expr, &value);
EndSPASMErrorSession(session);
if (fResult)
{
sprintf (result, "$%0X", value);
expr_value = strdup (result);
}
else
{
expr_value = expand_expr (expr);
}
return expr_value;
}
void write_labels (char *filename) {
FILE *symtable;
label_t hdr_node;
list_t label_list;
list_t *node;
symtable = fopen (filename, "w");
if (!symtable) {
printf ("Couldn't open output file %s\n", filename);
return;
}
// Create a header node with an impossible label name
hdr_node.name = strdup("#header");
label_list.data = &hdr_node;
label_list.next = NULL;
int session = StartSPASMErrorSession();
hash_enum (label_table, write_labels_callback, &label_list);
hash_enum (define_table, write_defines_callback, &label_list);
EndSPASMErrorSession(session);
node = label_list.next;
int index = 0;
while (node != NULL) {
label_t *label = (label_t *) node->data;
fprintf (symtable, "%s = $%.4X\n", label->name, label->value);
index++;
node = node->next;
}
fclose (symtable);
list_free (label_list.next, true, NULL);
free(hdr_node.name);
}
char *eval (const char *expr)
{
char result[256], *expr_value;
int value;
int session = StartSPASMErrorSession();
bool fResult = parse_num (expr, &value);
EndSPASMErrorSession(session);
if (fResult)
{
const char *sign = "";
if (value < 0) {
sign = "-";
value = -value;
}
snprintf (result, sizeof (result), "%s$%0X", sign, value);
expr_value = strdup (result);
}
else
{
expr_value = expand_expr (expr);
}
return expr_value;
}
char *parse_emit_string (const char *ptr, ES_TYPE type, void *echo_target) {
static int level = 0;
char *word = NULL;
int session;
bool fWasParsed;
char *name_end;
level++;
arg_context_t context = ARG_CONTEXT_INITIALIZER;
while ((word = extract_arg_string(&ptr, &context)) != NULL)
{
// handle strings
if (word[0] == '"')
{
char *next = next_expr (word, EXPR_DELIMS);
if (*next != '\0')
goto echo_error;
reduce_string (word);
if (type == ES_ECHO)
{
if (echo_target != NULL)
{
fprintf ((FILE *) echo_target, "%s", word);
}
}
else if (type == ES_FCREATE) {
eb_append((expand_buf_t *) echo_target, word, strlen(word));
} else {
int i;
for (i = 0; word[i]; i++) {
if ((mode & MODE_NORMAL) || (mode & MODE_LIST))
write_out (word[i]);
stats_datasize++;
program_counter++;
}
}
} else {
int value;
session = StartSPASMErrorSession();
fWasParsed = parse_num(word, &value);
if (fWasParsed == true)
{
switch (type)
{
case ES_ECHO:
{
if (echo_target != NULL)
{
fprintf ((FILE *) echo_target, "%d", value);
}
break;
}
#ifdef USE_BUILTIN_FCREATE
case ES_FCREATE:
{
char buffer[256];
sprintf_s(buffer, "%d", value);
eb_append((expand_buf_t *) echo_target, buffer, -1);
break;
}
#endif
case ES_BYTE:
{
write_arg(value, ARG_NUM_8, 0, 0);
stats_datasize++;
program_counter++;
break;
}
case ES_WORD:
{
write_arg(value, ARG_NUM_16, 0, 0);
stats_datasize+=2;
program_counter+=2;
break;
}
case ES_LONG:
{
write_arg(value, ARG_NUM_24, 0, 0);
stats_datasize+=3;
program_counter+=3;
break;
}
}
ReplaySPASMErrorSession(session);
}
else if (IsSPASMErrorSessionFatal(session) == false && type != ES_FCREATE)
{
switch (type)
{
case ES_ECHO:
break;
case ES_BYTE:
{
add_pass_two_expr(word, ARG_NUM_8, 0, 0);
stats_datasize++;
program_counter++;
break;
}
case ES_WORD:
{
add_pass_two_expr(word, ARG_NUM_16, 0, 0);
stats_datasize+=2;
program_counter+=2;
break;
}
case ES_LONG:
{
add_pass_two_expr(word, ARG_NUM_24, 0, 0);
stats_datasize += 3;
program_counter += 3;
break;
}
}
ReplayFatalSPASMErrorSession(session);
}
else
{
char name[256];
char *next;
define_t *define;
name_end = word;
//printf("error occured: %d, forward: %d, value: %d\n", error_occurred, parser_forward_ref_err, value);
read_expr (&name_end, name, "(");
//printf("Looking up %s\n", name);
next = name_end;
read_expr (&next, NULL, ")");
if (*next != '\0')
goto echo_error;
if ((define = search_defines (name))) {
char *expr;
list_t *args = NULL;
//handle defines
if (define->contents == NULL)
{
SetLastSPASMError(SPASM_ERR_ARG_USED_WITHOUT_VALUE, name);
}
if (*(name_end - 1) == '(') name_end--;
name_end = parse_args (name_end, define, &args);
if (!name_end)
return (char *) ptr;
expr = parse_define (define);
if (expr != NULL)
{
arg_context_t nested_context = ARG_CONTEXT_INITIALIZER;
// Is it some kind of argument list?
const char *nested_expr = expr;
extract_arg_string(&nested_expr, &nested_context);
if (extract_arg_string(&nested_expr, &nested_context) != NULL)
{
// if it is, plug it in to the emit string
parse_emit_string(expr, type, echo_target);
}
else
{
if (IsErrorInSPASMErrorSession(session, SPASM_ERR_EXCEEDED_RECURSION_LIMIT) == false)
{
int inner_session = StartSPASMErrorSession();
parse_emit_string(expr, type, echo_target);
if (IsSPASMErrorSessionFatal(inner_session))
{
EndSPASMErrorSession(inner_session);
AddSPASMErrorSessionAnnotation(session, _T("Error during evaluation of macro '%s'"), define->name);
ReplaySPASMErrorSession(session);
}
else
{
EndSPASMErrorSession(inner_session);
}
//ReplaySPASMErrorSession(session);
}
else
{
ReplaySPASMErrorSession(session);
}
}
free (expr);
}
remove_arg_set (args);
}
else
{
echo_error:
switch (type)
{
case ES_ECHO:
{
if (echo_target != NULL)
{
fprintf((FILE *) echo_target, "(error)");
}
break;
}
case ES_FCREATE:
{
SetLastSPASMError(SPASM_ERR_LABEL_NOT_FOUND, word);
eb_append((expand_buf_t *) echo_target, "(error)", -1);
break;
}
}
ReplaySPASMErrorSession(session);
}
}
EndSPASMErrorSession(session);
}
}
if (type == ES_ECHO && level == 1) {
if (echo_target == stdout) putchar ('\n');
else {
if (echo_target != NULL)
{
fclose ((FILE *) echo_target);
}
}
}
level--;
return (char *) ptr;
}
char *handle_directive (const char *ptr) {
static const char *dirs[] = {"db", "dw", "end", "org", "byte", "word", "fill", "block", "addinstr",
"echo", "error", "list", "nolist", "equ", "show", "option", "seek", "assume", "dl", "long", NULL};
char name_buf[32];
int dir;
//same deal as handle_preop, just with directives instead
bool valid_directive = false;
unsigned name_len = 0;
while (ptr[name_len] != 0 && !isspace(ptr[name_len])) {
name_len++;
}
// If longer than name_buf, it can't be a valid directive.
if (name_len < sizeof(name_buf)) {
// Copy string for comparing against
memcpy(name_buf, ptr, name_len);
name_buf[name_len] = 0;
dir = 0;
while (dirs[dir]) {
if (!strcasecmp(dirs[dir], name_buf)) {
valid_directive = true;
break;
}
dir++;
}
}
if (!valid_directive)
return handle_opcode_or_macro ((char *) ptr - 1);
ptr = skip_whitespace(&ptr[name_len]);
switch (dir) {
case 0: //DB
case 4: //BYTE
{
ptr = parse_emit_string (ptr, ES_BYTE, NULL);
break;
}
case 1: //DW
case 5: //WORD
{
ptr = parse_emit_string (ptr, ES_WORD, NULL);
break;
}
case 18: //DL
case 19: //LONG
{
ptr = parse_emit_string (ptr, ES_LONG, NULL);
break;
}
case 3: //ORG
{
int value;
char value_str[256] = "";
bool fResult = read_expr(&ptr, value_str, "");
if (fResult == true)
{
if (parse_num(value_str, &value) == true)
{
if (value < 0)
{
SetLastSPASMError(SPASM_ERR_INVALID_ADDRESS, skip_whitespace(value_str));
}
else
{
program_counter = value;
}
}
}
if ((fResult == false) || (strlen(skip_whitespace(value_str)) == 0))
{
SetLastSPASMError(SPASM_ERR_VALUE_EXPECTED);
}
break;
}
case 6: //FILL
case 7: //BLOCK
{
int size, fill_value;
char szSize[256], szFill[256];
bool old_listing_on = listing_on;
//listing_on = false;
read_expr (&ptr, szSize, ",");
parse_num (szSize, &size);
ptr = skip_whitespace (ptr);
if (*ptr == ',')
ptr++;
if (read_expr (&ptr, szFill, "")) {
//if there's a value to fill the block with, then handle that
parse_num (szFill, &fill_value);
} else {
//otherwise use 0
fill_value = 0;
}
if (size < 0) {
SetLastSPASMError(SPASM_ERR_SIZE_MUST_BE_POSITIVE, szSize);
listing_on = old_listing_on;
break;
}
if (fill_value < -128 || fill_value > 255)
{
SetLastSPASMWarning(SPASM_WARN_TRUNCATING_8);
}
program_counter += size;
stats_datasize += size;
while (size-- > 0)
write_out (fill_value & 0xFF);
//listing_on = old_listing_on;
break;
}
case 8: //ADDINSTR
{
instr *instr = (struct _instr *) malloc (sizeof (struct _instr));
char word[256];
int result;
char *mnemonic;
size_t i, base = 0, size_left;
int j;
opcode *last_opcode = NULL, *curr_opcode = all_opcodes, *new_opcode;
memset (instr, 0, sizeof (struct _instr));
// Mnemonic
if (!read_expr (&ptr, word, " \t")) goto addinstr_fail;
mnemonic = strdup (word);
// Args
if (!read_expr (&ptr, word, " \t")) goto addinstr_fail;
reduce_string (word);
instr->args = strdup (word);
// Instruction data
if (!read_expr (&ptr, word, " \t")) goto addinstr_fail;
conv_hex (word, word + strlen (word), &result);
instr->instr_size = strlen (word) / 2;
for (j = instr->instr_size - 1; j >= 0; j--)
instr->instr_data[instr->instr_size - j - 1] = (result >> (j * 8)) & 0xFF;
// Size
if (!read_expr (&ptr, word, " \t")) goto addinstr_fail;
if (!parse_num (word, &instr->size)) goto addinstr_fail;
// Class
read_expr (&ptr, word, " \t");
// Extended
read_expr (&ptr, word, " \t");
// End data ...
if (read_expr (&ptr, word, " \t")) {
int output;
conv_hex (word, word + strlen (word), &output);
instr->end_data = (unsigned char) output;
instr->has_end_data = true;
}
size_left = instr->size - instr->instr_size;
while ((i = strcspn (&instr->args[base], "*")) + base != strlen (instr->args)) {
switch (size_left - instr->has_end_data) {
case 2: ((char *) instr->args)[base+i] = '*'; break;
case 1: ((char *) instr->args)[base+i] = '&'; break;
default:
((char *) instr->args)[base+i] = '&'; break;
//show_error ("Invalid wildcard type in ADDRINSTR");
//goto addinstr_fail;
break;
}
size_left -= 2;
base += i + 1;
}
new_opcode = (opcode *) malloc (sizeof (opcode));
new_opcode->name = mnemonic;
new_opcode->num_instrs = 1;
new_opcode->use_count = 0;
new_opcode->instrs = instr;
new_opcode->is_added = true;
while (curr_opcode) {
if (strcasecmp (mnemonic, curr_opcode->name) == 0)
break;
last_opcode = curr_opcode;
curr_opcode = curr_opcode->next;
}
if (curr_opcode == NULL) {
last_opcode->next = new_opcode;
new_opcode->next = NULL;
} else {
new_opcode->next = curr_opcode;
if (last_opcode)
last_opcode->next = new_opcode;
else
all_opcodes = new_opcode;
}
// You can ignore class, etc
ptr = skip_to_line_end (ptr);
break;
addinstr_fail:
SetLastSPASMError(SPASM_ERR_INVALID_ADDINSTR);
if (instr && instr->args) free ((void *) instr->args);
if (instr) free (instr);
ptr = skip_to_line_end(ptr);
break;
}
case 9: //ECHO
{
if (ptr[0] == '>')
{
char target_format[2] = "w";
FILE *echo_target;
char filename[MAX_PATH];
char temp_filename[MAX_PATH];
define_t *define;
if ((++ptr)[0] == '>')
target_format[0] = 'a';
ptr = skip_whitespace (ptr + 1);
if (is_end_of_code_line (ptr)) {
SetLastSPASMError(SPASM_ERR_FILENAME_EXPECTED);
return NULL;
}
read_expr (&ptr, filename, " \t");
// Is the filename given a macro?
if ((define = search_defines (filename)))
strncpy (filename, skip_whitespace(define->contents), sizeof (filename));
reduce_string(filename);
if (is_abs_path(filename)) {
strncpy(temp_filename, skip_whitespace (filename), sizeof (temp_filename));
} else {
strncpy(temp_filename, temp_path, sizeof (temp_filename));
strncat(temp_filename, "/", sizeof (temp_filename) - 1);
strncat(temp_filename, skip_whitespace (filename), sizeof (temp_filename) - 1);
}
echo_target = fopen (fix_filename (temp_filename), target_format);
if (echo_target == NULL) {
SetLastSPASMError(SPASM_ERR_NO_ACCESS, filename);
return NULL;
}
//if the output's redirected to a file, process it now
WORD orig_attributes = save_console_attributes();
set_console_attributes (COLOR_GREEN);
ptr = parse_emit_string (ptr, ES_ECHO, echo_target);
restore_console_attributes(orig_attributes);
} else {
char expr[256];
read_expr (&ptr, expr, "");
// If it craps out for some reason, save it for the next pass
int session = StartSPASMErrorSession();
parse_emit_string (expr, ES_ECHO, NULL);
if (IsSPASMErrorSessionFatal(session) == true)
{
add_pass_two_output (expr, OUTPUT_ECHO);
}
else if (GetSPASMErrorSessionErrorCount(session) > 0)
{
WORD orig_attributes = save_console_attributes();
set_console_attributes(COLOR_GREEN);
int internal_session = StartSPASMErrorSession();
parse_emit_string (expr, ES_ECHO, stdout);
restore_console_attributes(orig_attributes);
EndSPASMErrorSession(internal_session);
ReplaySPASMErrorSession(session);
}
else
{
expand_buf_t *echo = eb_init(256);
parse_emit_string (expr, ES_FCREATE, echo);
char *echo_string = eb_extract(echo);
eb_free(echo);
char *expanded_string = escape_string(echo_string);
free(echo_string);
add_pass_two_output (expanded_string, OUTPUT_ECHO);
free(expanded_string);
}
EndSPASMErrorSession(session);
}
break;
}
case 10: //ERROR
{
expand_buf_t *eb = eb_init(64);
ptr = parse_emit_string(ptr, ES_FCREATE, eb);
char *error_str = eb_extract(eb);
eb_free(eb);
SetLastSPASMError(SPASM_ERR_CUSTOM, error_str);
free(error_str);
break;
}
case 11: //LIST
{
//if listing was off already, then the listing
// for the start of this line wouldn't have been
// written, so make sure the end doesn't get
// written either
if (!listing_on)
listing_for_line_done = true;
listing_on = true;
break;
}
case 12: //NOLIST
{
//if listing is on, then it would've written
// the starting stuff for this line already,
// so take that out
if ((mode & MODE_LIST) && listing_on)
listing_offset -= 14;
listing_on = false;
break;
}
case 13: //EQU
{
// Finally, a proper .equ!
int value;
char value_str[256];
read_expr (&ptr, value_str, "");
if (!parse_num (value_str, &value) && parser_forward_ref_err) {
} else {
if (last_label == NULL)
SetLastSPASMError(SPASM_ERR_EQUATE_MISSING_LABEL);
else
last_label->value = value;
}
break;
}
case 14: //SHOW
{
char name[256];
define_t *define;
//get the name
read_expr (&ptr, name, "");
define = search_defines (name);
if (define == NULL) {
//if it doesn't exist yet, save it for the second pass
add_pass_two_output (name, OUTPUT_SHOW);
} else {
//otherwise, show it now
show_define (define);
}
break;
}
case 15: //OPTION
{
char *word = NULL;
arg_context_t context = ARG_CONTEXT_INITIALIZER;
while ((word = extract_arg_string(&ptr, &context)) != NULL)
{
char name[256], *expr = word;
char *define_name;
define_t *define;
read_expr(&expr, name, "=");
if (*expr == '=')
{
expr++;
}
if (!(isalpha(name[0]))) {
SetLastSPASMError(SPASM_ERR_INVALID_OPTION, name);
return (char *) ptr;
}
if (is_end_of_code_line (skip_whitespace (expr)))
expr = strdup ("1");
else {
//if (!parse_num (expr, NULL))
// return NULL;
expr = strdup (expr);
}
if (strlen (name) == 0) {
show_error ("Invalid option statement");
return NULL;
}
define_name = (char *) malloc (strlen (name) + 3);
strcat (strcpy (define_name, "__"), name);
define = add_define (define_name, NULL);
set_define (define, expr, -1, false);
free(expr);
}
break;
}
case 16: //SEEK
{
int value;
char value_str[256];
read_expr (&ptr, value_str, "");
parse_num (value_str, (int *) &value);
//printf("value_str: %s\npc: %d\n", value_str, program_counter);
if (value > program_counter && (value - program_counter > output_buf_size - (out_ptr - output_contents)))
show_fatal_error ("Seek location %d out of bounds", value);
else if (value < program_counter && (value - (int) program_counter + (out_ptr - output_contents) < 0))
show_fatal_error ("Seek value %d too small", value);
out_ptr += value - ((int) program_counter);
//printf("base: %p; ptr: %p\n", output_contents, out_ptr);
program_counter = value;
break;
}
case 17: //ASSUME
{
char args[256];
read_expr(&ptr, args, "");
char word[256];
char *value_str = args;
read_expr(&value_str, word, "=");
int value = 1;
bool success = true;
if (*value_str == '=') {
success = parse_num(value_str+1, &value);
}
if (!(mode & MODE_EZ80) || strcasecmp(word, "adl") || !success) {
SetLastSPASMError(SPASM_ERR_INVALID_OPTION, args);
return (char *)ptr;
}
adl_mode = (value != 0);
break;
}
}
return (char *) ptr;
}
int run_assembly()
{
#ifdef _WIN32
struct _timeb time_start, time_end;
_ftime(&time_start);
#else
struct timeb time_start, time_end;
ftime(&time_start);
#endif
exit_code = EXIT_NORMAL;
/*extern int generic_map[256];
ZeroMemory(generic_map, 256);*/
program_counter = 0x0000;
stats_codesize = stats_datasize = stats_mintime = stats_maxtime = 0;
last_label = NULL;
error_occurred = false;
listing_offset = 0;
listing_for_line_done = false;
line_start = NULL;
old_line_num = 0;
in_macro = 0;
line_num = 0;
#ifdef USE_BUILTIN_FCREATE
cur_buf = 0;
#endif
#ifdef USE_REUSABLES
curr_reusable = 0;
total_reusables = 0;
#endif
expr_list = NULL;
expr_list_tail = NULL;
output_list = NULL;
output_list_tail = NULL;
assert(curr_input_file != NULL);
//read in the input file
if (!(mode & MODE_COMMANDLINE))
input_contents = (char *) get_file_contents (curr_input_file);
if (!input_contents) {
puts ("Couldn't open input file");
return EXIT_FATAL_ERROR;
}
out_ptr = output_contents;
//along with the listing buffer, if required
if ((mode & MODE_LIST)) {
listing_buf = eb_init (LISTING_BUF_SIZE);
listing_offset = 0;
listing_on = true;
}
//find the path of the input file
if (is_abs_path(curr_input_file)) {
int i;
strcpy(temp_path, curr_input_file);
for (i = strlen(temp_path) - 1;
temp_path[i] != '\\' && temp_path[i] != '/' && i > 0; i--);
if (i >= 0)
temp_path[i] = '\0';
else
strcpy(temp_path, ".");
} else {
#ifdef WIN32
_getcwd(temp_path, sizeof (temp_path));
#else
getcwd(temp_path, sizeof (temp_path));
#endif
}
//add the the input file's path to the include directories
include_dirs = list_prepend (include_dirs, strdup (temp_path));
printf ("Pass one... \n");
int first_pass_session = StartSPASMErrorSession();
run_first_pass ((char *) input_contents);
ReplayFatalSPASMErrorSession(first_pass_session);
EndSPASMErrorSession(first_pass_session);
//free include dirs when done
if ((mode & MODE_COMMANDLINE) == 0)
{
release_file_contents(input_contents);
input_contents = NULL;
}
list_free (include_dirs, true, NULL);
include_dirs = NULL;
//...and if there's output, run the second pass and write it to the output file
if (mode & MODE_SYMTABLE || mode & MODE_NORMAL || mode & MODE_LIST)
{
printf ("Pass two... \n");
int second_pass_session = StartSPASMErrorSession();
run_second_pass ();
ReplaySPASMErrorSession(second_pass_session);
EndSPASMErrorSession(second_pass_session);
if (mode & MODE_SYMTABLE) {
char* fileName = change_extension(output_filename, "lab");
write_labels (fileName);
free(fileName);
}
//run the output through the appropriate program export and write it to a file
if (mode & MODE_NORMAL && output_filename != NULL)
{
write_file (output_contents, out_ptr - output_contents, output_filename);
}
//write the listing file if necessary
if ((mode & MODE_LIST)) {
FILE *file;
char *name;
//get file name
name = change_extension (output_filename, "lst");
file = fopen (name, "wb");
if (!file) {
printf ("Couldn't open listing file '%s'", name);
free (name);
return EXIT_FATAL_ERROR;
}
free (name);
if (fwrite (listing_buf->start, 1, listing_offset, file) != listing_offset) {
puts ("Error writing to listing file");
fclose (file);
return EXIT_FATAL_ERROR;
}
fclose (file);
eb_free(listing_buf);
listing_buf = NULL;
}
//free the output buffer and all the names of input files
list_free(input_files, true, NULL);
input_files = NULL;
}
//if there's info to be dumped, do that
if (mode & MODE_CODE_COUNTER) {
fprintf (stdout, "Size: %u\nMin. execution time: %u\nMax. execution time: %u\n",
stats_codesize, stats_mintime, stats_maxtime);
}
if (mode & MODE_STATS) {
fprintf(stdout, "Number of labels: %u\nNumber of defines: %u\nCode size: %u\nData size: %u\nTotal size: %u\n",
get_num_labels (), get_num_defines (), stats_codesize, stats_datasize, stats_codesize + stats_datasize);
}
#ifdef _WIN32
_ftime(&time_end);
#else
ftime(&time_end);
#endif
int s_diff = (int) (time_end.time - time_start.time);
int ms_diff = time_end.millitm - time_start.millitm;
if (ms_diff < 0) {
ms_diff += 1000;
s_diff -= 1;
} else if (ms_diff > 1000) {
ms_diff -= 1000;
s_diff += 1;
}
printf("Assembly time: %0.3f seconds\n", (float) s_diff + ((float) ms_diff / 1000.0f));
return exit_code;
}