label_t *add_label (char *name, int value) {
label_t *new_label;
define_t *conflict_define;
if (mode & MODE_CODE_COUNTER) {
free(name);
return NULL;
}
if (!case_sensitive) {
char *new_name = strup (name);
free (name);
name = new_name;
}
if ((conflict_define = search_defines(name))) {
show_error ("conflicting definition of '%s'", name);
//if (suppress_errors == false) {
show_error_prefix (conflict_define->input_file, conflict_define->line_num);
WORD attr = save_console_attributes();
set_console_attributes (COLOR_RED);
printf ("previous definition of '%s' was here\n", name);
restore_console_attributes(attr);
//}
return NULL;
}
if ((new_label = search_labels (name))) {
if (value != new_label->value) {
new_label->value = value;
show_warning ("redefinition of '%s'", name);
show_warning_prefix (new_label->input_file, new_label->line_num);
WORD attr = save_console_attributes();
set_console_attributes (COLOR_YELLOW);
printf ("previous definition of '%s' was here\n", name);
restore_console_attributes(attr);
}
} else {
new_label = (label_t *)malloc (sizeof (label_t));
if (new_label != NULL) {
new_label->name = name;
new_label->line_num = line_num;
new_label->input_file = strdup(curr_input_file);
new_label->value = value;
hash_insert (label_table, new_label);
}
}
return new_label;
}
static void PrintSPASMError(const LPERRORINSTANCE lpError)
{
if (mode & MODE_CODE_COUNTER)
{
return;
}
assert(lpError != NULL);
if ((lpError->dwErrorCode != SPASM_ERR_SUCCESS) || (lpError->lpszErrorText != NULL))
{
WORD orig_attributes = save_console_attributes();
set_console_attributes(lpError->fIsWarning ? COLOR_YELLOW : COLOR_RED);
if (lpError->lpszAnnotation != NULL)
{
printf("%s\n", lpError->lpszAnnotation);
}
printf("%s\n", lpError->lpszErrorText);
#ifdef WINVER
OutputDebugString(lpError->lpszErrorText);
OutputDebugString(_T("\n"));
#endif
restore_console_attributes(orig_attributes);
}
}
void show_define (define_t *define) {
WORD console_attrib = save_console_attributes();
set_console_attributes (COLOR_BLUE);
fputs (define->name, stdout);
if (define->num_args > 0) {
int i;
putchar ('(');
for (i = 0; i < define->num_args; i++) {
if (i != 0) fputs (", ", stdout);
fputs (define->args[i], stdout);
}
putchar (')');
}
if (define->contents != NULL)
{
printf (": %s", define->contents);
}
putchar ('\n');
restore_console_attributes(console_attrib);
#ifdef WIN32
if (define->contents != NULL)
{
OutputDebugString(define->contents);
OutputDebugString("\n");
}
#endif
}
void show_fatal_error(const char *text, ...) {
#ifdef WIN32
WORD attr = save_console_attributes();
set_console_attributes (COLOR_RED);
#endif
va_list args;
if (exit_code < EXIT_FATAL_ERROR) exit_code = EXIT_FATAL_ERROR;
show_error_prefix(curr_input_file, line_num);
#ifdef WIN32
OutputDebugString(text);
OutputDebugString(TEXT("\n"));
#endif
va_start(args, text);
vprintf (text, args);
putchar ('\n');
error_occurred = true;
#ifdef WIN32
restore_console_attributes(attr);
#endif
}
void show_warning_prefix(const char *zcif, int zln) {
#ifdef WIN32
WORD attr = save_console_attributes();
#endif
set_console_attributes (COLOR_YELLOW);
printf ("%s:%d: warning: ", zcif, zln);
#ifdef WIN32
restore_console_attributes(attr);
#endif
}
void show_error_prefix(const char *zcif, const int zln) {
//BuckeyeDude
//this is temporary till everything is rolled into errors.cpp
WORD attr = save_console_attributes();
#ifdef _WIN32
//TCHAR szPrefix[256];
//sprintf(szPrefix, "%s:%d: error: ", zcif, zln);
//OutputDebugString(szPrefix);
#endif
set_console_attributes (COLOR_RED);
printf ("%s:%d: error: ", zcif, zln);
restore_console_attributes(attr);
}
void show_error(const char *text, ...) {
WORD attr = save_console_attributes();
va_list args;
if (exit_code < EXIT_ERRORS) exit_code = EXIT_ERRORS;
show_error_prefix(curr_input_file, line_num);
set_console_attributes (COLOR_RED);
va_start(args, text);
vprintf (text, args);
putchar ('\n');
restore_console_attributes(attr);
}
void show_warning(const char *text, ...) {
WORD attr = save_console_attributes();
va_list args;
if (exit_code < EXIT_WARNINGS) exit_code = EXIT_WARNINGS;
show_warning_prefix(curr_input_file, line_num);
#ifdef WIN32
OutputDebugString(text);
OutputDebugString(TEXT("\n"));
#endif
set_console_attributes (COLOR_YELLOW);
va_start(args, text);
vprintf (text, args);
putchar ('\n');
restore_console_attributes(attr);
}
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 main (int argc, char **argv)
{
int curr_arg = 1;
bool case_sensitive = false;
bool is_storage_initialized = false;
use_colors = true;
extern WORD user_attributes;
user_attributes = save_console_attributes ();
atexit (restore_console_attributes_at_exit);
//if there aren't enough args, show info
if (argc < 2) {
puts ("SPASM-ng Z80 Assembler by Spencer Putt and Don Straney");
printf ("Version %s (built on %s @ %s)\n", SPASM_NG_VERSION, __DATE__, __TIME__);
#ifdef SPASM_NG_GITREV
printf ("Git revision %s\n", SPASM_NG_GITREV);
#endif
#ifdef _M_X64
puts ("64-bit Version");
#endif
#ifdef NO_APPSIGN
printf ("\nApp signing is NOT available in this build of SPASM.\n");
#endif
puts ("\nspasm [options] <input file> <output file>\n");
puts ("Options:\n-E = Assemble eZ80 code\n-T = Generate code listing\n-C = Code counter mode\n-L = Symbol table mode\n-S = Stats mode\n-O = Don't write to output file");
puts ("-I [directory] = Add include directory\n-A = Labels are cAse-sensitive\n-D<name>[=value] = Create a define 'name' [with 'value']");
puts ("-N = Don't use colors for messages");
puts ("-V <Expression> = Pipe expression directly into assembly");
#if defined(_DEBUG) && defined(WIN32)
if (IsDebuggerPresent())
{
system("PAUSE");
}
#endif
return EXIT_NORMAL;
}
//init stuff
mode = MODE_NORMAL;
in_macro = 0;
//otherwise, get any options
curr_input_file = strdup("Commandline");
char *starting_input_file = curr_input_file;
while (curr_arg < argc) {
if (argv[curr_arg][0] == '-'
#ifdef _WINDOWS
|| argv[curr_arg][0] == '/'
#endif
)
{
switch (argv[curr_arg][1])
{
//args for different modes
case 'O':
mode = mode & (~MODE_NORMAL);
break;
case 'T':
mode |= MODE_LIST;
break;
case 'C':
mode |= MODE_CODE_COUNTER;
break;
case 'L':
mode |= MODE_SYMTABLE;
break;
case 'S':
mode |= MODE_STATS;
break;
case 'E':
mode |= MODE_EZ80;
all_opcodes = opcode_list_ez80;
break;
//handle no-colors flag
case 'N':
use_colors = false;
break;
//handle include files too
case 'I':
{
char *dir, *p;
//make sure there's another argument after it for the include path
if (strlen(argv[curr_arg]) > 2) {
dir = strdup (&argv[curr_arg][2]);
} else {
if (curr_arg >= argc - 1) {
printf ("%s used without include path\n", argv[curr_arg]);
break;
}
dir = strdup (argv[++curr_arg]);
}
for (p = strtok (dir, ";,"); p; p = strtok (NULL, ";,")) {
include_dirs = list_append (include_dirs, strdup(p));
}
free(dir);
break;
}
//and the case-sensitive flag
case 'A':
case_sensitive = true;
break;
//handle adding defines
case 'D':
{
char name[256];
char *ptr;
define_t *define;
if (!is_storage_initialized)
{
init_storage();
is_storage_initialized = true;
}
if (strlen (argv[curr_arg]) > 2) {
ptr = &argv[curr_arg][2];
} else {
if (curr_arg >= argc - 1) {
printf ("%s used without define name", argv[curr_arg]);
break;
}
ptr = argv[++curr_arg];
}
read_expr (&ptr, name, "=");
define = add_define (strdup (name), NULL);
if (*skip_whitespace (++ptr) != '\0')
define->contents = strdup (ptr);
else
set_define (define, "1", 1, false);
break;
}
case 'V':
{
char *line;
//check for something after -V
if (strlen(argv[curr_arg]) > 2) {
line = &argv[curr_arg][2];
} else {
//if not lets fail
if (curr_arg >= argc - 1) {
printf ("%s used without a line to assemble\n", argv[curr_arg]);
return EXIT_FATAL_ERROR;
}
line = argv[++curr_arg];
}
mode |= MODE_COMMANDLINE;
curr_input_file = strdup("-v");
input_contents = (char *) malloc (strlen(line) + 1 + 2);
output_filename = change_extension (curr_input_file, "bin");
strcpy(input_contents, line);
strcat(input_contents, "\n");
break;
}
default:
{
#ifndef _TEST
#ifdef _WINDOWS
printf ("Unrecognized option %s\n", argv[curr_arg]);
#ifdef SPASM_NG_ENABLE_COM
FreeConsole();
return _AtlModule.WinMain(SW_HIDE);
#endif
#endif
#else
printf ("Unrecognized option %s\n", argv[curr_arg]);
#endif
}
}
} else {
//if it's not a flag, then it must be a filename
if (curr_input_file && (curr_input_file != starting_input_file) && !output_filename)
output_filename = strdup(argv[curr_arg]);
else if ((!curr_input_file) || (curr_input_file == starting_input_file))
curr_input_file = strdup(argv[curr_arg]);
}
curr_arg++;
}
// Update case sensitivity settings
set_case_sensitive (case_sensitive);
//check on filenames
if (!(mode & MODE_COMMANDLINE) && curr_input_file == starting_input_file) {
puts ("No input file specified");
free(starting_input_file);
return EXIT_FATAL_ERROR;
}
if (curr_input_file != starting_input_file) {
free(starting_input_file);
}
if (!output_filename) {
output_filename = change_extension (curr_input_file, "bin");
}
if (!is_storage_initialized)
{
init_storage();
is_storage_initialized = true;
}
output_contents = (unsigned char *) malloc(output_buf_size);
ClearSPASMErrorSessions();
int error = run_assembly();
free(output_filename);
output_filename = NULL;
if (curr_input_file) {
free(curr_input_file);
curr_input_file = NULL;
}
if (include_dirs) {
list_free(include_dirs, true, NULL);
}
free(output_contents);
output_contents = NULL;
ClearSPASMErrorSessions();
free_storage();
#ifdef _WINDOWS
_CrtDumpMemoryLeaks();
if (IsDebuggerPresent())
{
system("PAUSE");
}
#endif
return error;
}
define_t *add_define (char *name, bool *redefined, bool search_local) {
define_t *define;
label_t *conflict_label;
if (strlen(name) == 0) {
SetLastSPASMError(SPASM_ERR_NAME_EXPECTED);
free(name);
return NULL;
}
if (!case_sensitive) {
char *new_name = strup (name);
free (name);
name = new_name;
}
if ((conflict_label = search_labels(name))) {
show_error ("conflicting definition of '%s'", name);
//if (suppress_errors == false) {
show_error_prefix (conflict_label->input_file, conflict_label->line_num);
WORD attr = save_console_attributes();
set_console_attributes (COLOR_RED);
printf ("previous definition of '%s' was here\n", name);
restore_console_attributes(attr);
//}
return NULL;
}
// handle redefinitions
if ((define = search_defines (name, search_local))) {
int curr_arg;
free (name);
//define->line_num = line_num;
//define->input_file = curr_input_file;
/* Don't clear the contents of the #define, because
if it's being redefined references to itself may
need to be expanded, which will require the original
contents - all handled by set_define */
for (curr_arg = 0; curr_arg < define->num_args; curr_arg++) {
if (define->args[curr_arg] != NULL) {
free(define->args[curr_arg]);
define->args[curr_arg] = NULL;
}
}
define->num_args = 0;
if (redefined != NULL)
*redefined = true;
return define;
}
if (redefined != NULL)
*redefined = false;
define = (define_t *) malloc (sizeof (define_t));
if (define != NULL) {
int curr_arg;
define->name = name;
define->line_num = line_num;
define->input_file = strdup(curr_input_file);
define->contents = NULL;
define->num_args = 0;
for (curr_arg = 0; curr_arg < MAX_ARGS; curr_arg++)
define->args[curr_arg] = NULL;
hash_insert (define_table, define);
}
return define;
}
void show_warning_prefix(const char *zcif, int zln) {
WORD attr = save_console_attributes();
set_console_attributes (COLOR_YELLOW);
printf ("%s:%d: warning: ", zcif, zln);
restore_console_attributes(attr);
}
