// insert byte until PC fits condition
static enum eos_t PO_align(void) {
intval_t and,
equal,
fill,
test = CPU_pc.intval;
// make sure PC is defined.
if ((CPU_pc.flags & MVALUE_DEFINED) == 0) {
Throw_error(exception_pc_undefined);
CPU_pc.flags |= MVALUE_DEFINED; // do not complain again
return SKIP_REMAINDER;
}
and = ALU_defined_int();
if (!Input_accept_comma())
Throw_error(exception_syntax);
equal = ALU_defined_int();
if (Input_accept_comma())
fill = ALU_any_int();
else
fill = CPU_now->default_align_value;
while ((test++ & and) != equal)
Output_8b(fill);
return ENSURE_EOS;
}
// try to load encoding table from given file
void encoding_load(char target[256], const char *filename)
{
FILE *fd = fopen(filename, FILE_READBINARY);
if (fd) {
if (fread(target, sizeof(char), 256, fd) != 256)
Throw_error("Conversion table incomplete.");
fclose(fd);
} else {
Throw_error(exception_cannot_open_input_file);
}
}
// Try to read a file name. If "allow_library" is TRUE, library access by using
// <...> quoting is possible as well. The file name given in the assembler
// source code is converted from UNIX style to platform style.
// Returns whether error occurred (TRUE on error). Filename in GlobalDynaBuf.
// Errors are handled and reported, but caller should call
// Input_skip_remainder() then.
bool Input_read_filename(bool allow_library) {
char *lib_prefix,
end_quote;
DYNABUF_CLEAR(GlobalDynaBuf);
SKIPSPACE();
// check for library access
if(GotByte == '<') {
// if library access forbidden, complain
if(allow_library == FALSE) {
Throw_error("Writing to library not supported.");
return(TRUE);
}
// read platform's lib prefix
lib_prefix = PLATFORM_LIBPREFIX;
#ifndef NO_NEED_FOR_ENV_VAR
// if lib prefix not set, complain
if(lib_prefix == NULL) {
Throw_error("\"ACME\" environment variable not found.");
return(TRUE);
}
#endif
// copy lib path and set quoting char
DynaBuf_add_string(GlobalDynaBuf, lib_prefix);
end_quote = '>';
} else {
if(GotByte == '"')
end_quote = '"';
else {
Throw_error("File name quotes not found (\"\" or <>).");
return(TRUE);
}
}
// read first character, complain if closing quote
if(GetQuotedByte() == end_quote) {
Throw_error("No file name given.");
return(TRUE);
}
// read characters until closing quote (or EOS) is reached
// append platform-converted characters to current string
while((GotByte != CHAR_EOS) && (GotByte != end_quote)) {
DYNABUF_APPEND(GlobalDynaBuf, PLATFORM_CONVERTPATHCHAR(GotByte));
GetQuotedByte();
}
// on error, return
if(GotByte == CHAR_EOS)
return(TRUE);
GetByte(); // fetch next to forget closing quote
// terminate string
DynaBuf_append(GlobalDynaBuf, '\0'); // add terminator
return(FALSE); // no error
}
// (Re)set label
static enum eos_t PO_set(void) // Now GotByte = illegal char
{
struct result_t result;
int force_bit;
struct label_t *label;
zone_t zone;
if (Input_read_zone_and_keyword(&zone) == 0) // skips spaces before
// Now GotByte = illegal char
return SKIP_REMAINDER;
force_bit = Input_get_force_bit(); // skips spaces after
label = Label_find(zone, force_bit);
if (GotByte != '=') {
Throw_error(exception_syntax);
return SKIP_REMAINDER;
}
// label = parsed value
GetByte(); // proceed with next char
ALU_any_result(&result);
// clear label's force bits and set new ones
label->result.flags &= ~(MVALUE_FORCEBITS | MVALUE_ISBYTE);
if (force_bit) {
label->result.flags |= force_bit;
result.flags &= ~(MVALUE_FORCEBITS | MVALUE_ISBYTE);
}
Label_set_value(label, &result, TRUE);
return ENSURE_EOS;
}
// if cpu type and value match, set register length variable to value.
// if cpu type and value don't match, complain instead.
static void check_and_set_reg_length(int *var, int make_long)
{
if (((CPU_now->flags & CPUFLAG_SUPPORTSLONGREGS) == 0) && make_long)
Throw_error("Chosen CPU does not support long registers.");
else
*var = make_long;
}
// Search for label. Create if nonexistant. If created, give it flags "Flags".
// The label name must be held in GlobalDynaBuf.
struct label_t *Label_find(zone_t zone, int flags)
{
struct node_ra_t *node;
struct label_t *label;
int node_created,
force_bits = flags & MVALUE_FORCEBITS;
node_created = Tree_hard_scan(&node, Label_forest, zone, TRUE);
// if node has just been created, create label as well
if (node_created) {
// Create new label structure
label = safe_malloc(sizeof(*label));
// Finish empty label item
label->result.flags = flags;
if (flags & MVALUE_IS_FP)
label->result.val.fpval = 0;
else
label->result.val.intval = 0;
label->usage = 0; // usage count
label->pass = pass_count;
node->body = label;
} else {
label = node->body;
}
// make sure the force bits don't clash
if ((node_created == FALSE) && force_bits)
if ((label->result.flags & MVALUE_FORCEBITS) != force_bits)
Throw_error("Too late for postfix.");
return label;
}
// Include source file ("!source" or "!src"). Has to be re-entrant.
static enum eos_t PO_source(void) {// Now GotByte = illegal char
FILE* fd;
char local_gotbyte;
input_t new_input,
*outer_input;
// Enter new nesting level.
// Quit program if recursion too deep.
if(--source_recursions_left < 0)
Throw_serious_error("Too deeply nested. Recursive \"!source\"?");
// Read file name. Quit function on error.
if(Input_read_filename(TRUE))
return(SKIP_REMAINDER);
// If file could be opened, parse it. Otherwise, complain.
if((fd = fopen(GLOBALDYNABUF_CURRENT, FILE_READBINARY))) {
char *filename = (char *) safe_malloc(GlobalDynaBuf->size); // MPi: Arrays must be a constant expression
strcpy(filename, GLOBALDYNABUF_CURRENT);
outer_input = Input_now;// remember old input
local_gotbyte = GotByte;// CAUTION - ugly kluge
Input_now = &new_input;// activate new input
Parse_and_close_file(fd, filename);
Input_now = outer_input;// restore previous input
GotByte = local_gotbyte;// CAUTION - ugly kluge
free(filename);
} else
Throw_error(exception_cannot_open_input_file);
// Leave nesting level
source_recursions_left++;
return(ENSURE_EOS);
}
// Parse {block} [else {block}]
static void parse_block_else_block(bool parse_first) {
// Parse first block.
// If it's not correctly terminated, return immediately (because
// in that case, there's no use in checking for an "else" part).
if(skip_or_parse_block(parse_first))
return;
// now GotByte = '}'. Check for "else" part.
// If end of statement, return immediately.
NEXTANDSKIPSPACE();
if(GotByte == CHAR_EOS)
return;
// read keyword and check whether really "else"
if(Input_read_and_lower_keyword()) {
if(strcmp(GlobalDynaBuf->buffer, "else"))
Throw_error(exception_syntax);
else {
SKIPSPACE();
if(GotByte != CHAR_SOB)
Throw_serious_error(exception_no_left_brace);
skip_or_parse_block(!parse_first);
// now GotByte = '}'
GetByte();
}
}
Input_ensure_EOS();
}
// Ensure that the remainder of the current statement is empty, for example
// after mnemonics using implied addressing.
void Input_ensure_EOS(void) {// Now GotByte = first char to test
SKIPSPACE();
if(GotByte) {
Throw_error("Garbage data at end of statement.");
Input_skip_remainder();
}
}
// Assign value to label. The function acts upon the label's flag bits and
// produces an error if needed.
void Label_set_value(struct label_t *label, struct result_t *newvalue, int change_allowed)
{
int oldflags = label->result.flags;
// value stuff
if ((oldflags & MVALUE_DEFINED) && (change_allowed == FALSE)) {
// Label is already defined, so compare new and old values
// if different type OR same type but different value, complain
if (((oldflags ^ newvalue->flags) & MVALUE_IS_FP)
|| ((oldflags & MVALUE_IS_FP)
? (label->result.val.fpval != newvalue->val.fpval)
: (label->result.val.intval != newvalue->val.intval)))
Throw_error("Label already defined.");
} else {
// Label is not defined yet OR redefinitions are allowed
label->result = *newvalue;
}
// flags stuff
// Ensure that "unsure" labels without "isByte" state don't get that
if ((oldflags & (MVALUE_UNSURE | MVALUE_ISBYTE)) == MVALUE_UNSURE)
newvalue->flags &= ~MVALUE_ISBYTE;
if (change_allowed) {
oldflags = (oldflags & MVALUE_UNSURE) | newvalue->flags;
} else {
if ((oldflags & MVALUE_FORCEBITS) == 0)
if ((oldflags & (MVALUE_UNSURE | MVALUE_DEFINED)) == 0)
oldflags |= newvalue->flags & MVALUE_FORCEBITS;
oldflags |= newvalue->flags & ~MVALUE_FORCEBITS;
}
label->result.flags = oldflags;
}
// Try to read a condition into DynaBuf and store copy pointer in
// given loopcond_t structure.
// If no condition given, NULL is written to structure.
// Call with GotByte = first interesting character
static void store_condition(loopcond_t* condition, char terminator) {
void* node_body;
// write line number
condition->line = Input_now->line_number;
// Check for empty condition
if(GotByte == terminator) {
// Write NULL condition, then return
condition->body = NULL;
return;
}
// Seems as if there really *is* a condition.
// Read UNTIL/WHILE keyword
if(Input_read_and_lower_keyword()) {
// Search for new tree item
if(!Tree_easy_scan(condkey_tree, &node_body, GlobalDynaBuf)) {
Throw_error(exception_syntax);
condition->body = NULL;
return;
}
condition->type = (enum cond_key_t) node_body;
// Write given condition into buffer
SKIPSPACE();
DYNABUF_CLEAR(GlobalDynaBuf);
Input_until_terminator(terminator);
DynaBuf_append(GlobalDynaBuf, CHAR_EOS);// ensure terminator
condition->body = DynaBuf_get_copy(GlobalDynaBuf);
}
return;
}
// Looping assembly ("!for"). Has to be re-entrant.
static enum eos_t PO_for(void) {// Now GotByte = illegal char
input_t loop_input,
*outer_input;
result_t loop_counter;
intval_t maximum;
char* loop_body;// pointer to loop's body block
label_t* label;
zone_t zone;
int force_bit,
loop_start;// line number of "!for" pseudo opcode
if(Input_read_zone_and_keyword(&zone) == 0) // skips spaces before
return(SKIP_REMAINDER);
// Now GotByte = illegal char
force_bit = Input_get_force_bit(); // skips spaces after
label = Label_find(zone, force_bit);
if(Input_accept_comma() == FALSE) {
Throw_error(exception_syntax);
return(SKIP_REMAINDER);
}
maximum = ALU_defined_int();
if(maximum < 0)
Throw_serious_error("Loop count is negative.");
if(GotByte != CHAR_SOB)
Throw_serious_error(exception_no_left_brace);
// remember line number of loop pseudo opcode
loop_start = Input_now->line_number;
// read loop body into DynaBuf and get copy
loop_body = Input_skip_or_store_block(TRUE); // changes line number!
// switching input makes us lose GotByte. But we know it's '}' anyway!
// set up new input
loop_input = *Input_now;// copy current input structure into new
loop_input.source_is_ram = TRUE; // set new byte source
// remember old input
outer_input = Input_now;
// activate new input
// (not yet useable; pointer and line number are still missing)
Input_now = &loop_input;
// init counter
loop_counter.flags = MVALUE_DEFINED | MVALUE_EXISTS;
loop_counter.val.intval = 0;
// if count == 0, skip loop
if(maximum) {
do {
loop_counter.val.intval++;// increment counter
Label_set_value(label, &loop_counter, TRUE);
parse_ram_block(loop_start, loop_body);
} while(loop_counter.val.intval < maximum);
} else
Label_set_value(label, &loop_counter, TRUE);
// Free memory
free(loop_body);
// restore previous input:
Input_now = outer_input;
// GotByte of OuterInput would be '}' (if it would still exist)
GetByte(); // fetch next byte
return(ENSURE_EOS);
}
// Select CPU ("!cpu" pseudo opcode)
static enum eos_t PO_cpu(void) {
struct cpu_t* cpu_buffer = CPU_now; // remember current cpu
if(Input_read_and_lower_keyword())
if(!CPU_find_cpu_struct(&CPU_now))
Throw_error("Unknown processor.");
// If there's a block, parse that and then restore old value!
if(Parse_optional_block())
CPU_now = cpu_buffer;
return(ENSURE_EOS);
}
// Append to GlobalDynaBuf while characters are legal for keywords.
// Throws "missing string" error if none.
// Returns number of characters added.
int Input_append_keyword_to_global_dynabuf(void) {
int length = 0;
// add characters to buffer until an illegal one comes along
while(BYTEFLAGS(GotByte) & CONTS_KEYWORD) {
DYNABUF_APPEND(GlobalDynaBuf, GotByte);
length++;
GetByte();
}
if(length == 0)
Throw_error(exception_missing_string);
return(length);
}
// Parse a whole source code file
void Parse_and_close_file(FILE* fd, const char* filename) {
// be verbose
if(Process_verbosity > 2)
printf("Parsing source file '%s'\n", filename);
// set up new input
Input_new_file(filename, fd);
// Parse block and check end reason
Parse_until_eob_or_eof();
if(GotByte != CHAR_EOF)
Throw_error("Found '}' instead of end-of-file.");
// close sublevel src
fclose(Input_now->src.fd);
}
// lookup encoder held in DynaBuf and return its struct pointer (or NULL on failure)
const struct encoder *encoding_find(void)
{
void *node_body;
// make sure tree is initialised
if (encoder_tree == NULL)
Tree_add_table(&encoder_tree, encoder_list);
// perform lookup
if (!Tree_easy_scan(encoder_tree, &node_body, GlobalDynaBuf)) {
Throw_error("Unknown encoding.");
return NULL;
}
return node_body;
}
// read optional info about parameter length
int Input_get_force_bit(void) {
char byte;
int force_bit = 0;
if(GotByte == '+') {
byte = GetByte();
if(byte == '1')
force_bit = MVALUE_FORCE08;
else if(byte == '2')
force_bit = MVALUE_FORCE16;
else if(byte == '3')
force_bit = MVALUE_FORCE24;
if(force_bit)
GetByte();
else
Throw_error("Illegal postfix.");
}
SKIPSPACE();
return(force_bit);
}
// This function delivers the next byte from the currently active byte source
// in un-shortened high-level format.
// This function complains if CHAR_EOS (end of statement) is read.
char GetQuotedByte(void) {
int from_file; // must be an int to catch EOF
// If byte source is RAM, then no conversion is necessary,
// because in RAM the source already has high-level format
if(Input_now->source_is_ram)
GotByte = *(Input_now->src.ram_ptr++);
// Otherwise, the source is a file.
else {
// fetch a fresh byte from the current source file
from_file = hacked_getc(Input_now);
switch(from_file) {
case EOF:
// remember to send an end-of-file
Input_now->state = INPUTSTATE_EOF;
GotByte = CHAR_EOS; // end of statement
break;
case CHAR_LF:// LF character
// remember to send a start-of-line
Input_now->state = INPUTSTATE_LF;
GotByte = CHAR_EOS; // end of statement
break;
case CHAR_CR:// CR character
// remember to check for CRLF + send a start-of-line
Input_now->state = INPUTSTATE_CR;
GotByte = CHAR_EOS; // end of statement
break;
default:
GotByte = from_file;
}
}
// now check for end of statement
if(GotByte == CHAR_EOS)
Throw_error("Quotes still open at end of line.");
return(GotByte);
}
// Include binary file
static enum eos_t PO_binary(void) {
FILE* fd;
int byte;
intval_t size = -1, // means "not given" => "until EOF"
skip = 0,
interleave = 1;
int skipByte;
// if file name is missing, don't bother continuing
if(Input_read_filename(TRUE))
return(SKIP_REMAINDER);
// try to open file
fd = fopen(GLOBALDYNABUF_CURRENT, FILE_READBINARY);
if(fd == NULL) {
Throw_error(exception_cannot_open_input_file);
return(SKIP_REMAINDER);
}
// read optional arguments
if(Input_accept_comma()) {
if(ALU_optional_defined_int(&size)
&& (size <0))
Throw_serious_error("Negative size argument.");
if(Input_accept_comma())
{
ALU_optional_defined_int(&skip);// read skip
if(Input_accept_comma())
{
ALU_optional_defined_int(&interleave);// read interleave
if (interleave <= 1)
{
Throw_serious_error("Negative size argument.");
}
}
}
}
skipByte = interleave;
// check whether including is a waste of time
if((size >= 0) && (pass_undefined_count || pass_real_errors))
Output_fake(size); // really including is useless anyway
else {
// really insert file
fseek(fd, skip, SEEK_SET); // set read pointer
// if "size" non-negative, read "size" bytes.
// otherwise, read until EOF.
while(size != 0) {
byte = getc(fd);
if(byte == EOF)
break;
skipByte++;
if (skipByte >= interleave)
{
Output_byte(byte);
size--;
skipByte = 0;
}
}
// if more should have been read, warn and add padding
if(size > 0) {
Throw_warning("Padding with zeroes.");
do
Output_byte(0);
while(--size);
}
}
fclose(fd);
// if verbose, produce some output
if((pass_count == 0) && (Process_verbosity > 1))
printf("Loaded %d ($%x) bytes from file offset %ld ($%lx).\n",
CPU_2add, CPU_2add, skip, skip);
return(ENSURE_EOS);
}
// If cpu type and value match, set register length variable to value.
// If cpu type and value don't match, complain instead.
static void check_and_set_reg_length(bool *var, bool long_reg) {
if(long_reg && ((CPU_now->long_regs) == NULL))
Throw_error("Chosen CPU does not support long registers.");
else
*var = long_reg;
}
// Deliver source code from current file (!) in shortened high-level format
static char get_processed_from_file(void) {
int from_file;
do {
switch(Input_now->state) {
case INPUTSTATE_NORMAL:
// fetch a fresh byte from the current source file
//from_file = getc(Input_now->src.fd);
from_file = hacked_getc(Input_now);
// now process it
/*FALLTHROUGH*/
case INPUTSTATE_AGAIN:
// Process the latest byte again. Of course, this only
// makes sense if the loop has executed at least once,
// otherwise the contents of from_file are undefined.
// If the source is changed so there is a possibility
// to enter INPUTSTATE_AGAIN mode without first having
// defined "from_file", trouble may arise...
Input_now->state = INPUTSTATE_NORMAL;
// EOF must be checked first because it cannot be used
// as an index into Byte_flags[]
if(from_file == EOF) {
// remember to send an end-of-file
Input_now->state = INPUTSTATE_EOF;
return(CHAR_EOS);// end of statement
}
// check whether character is special one
// if not, everything's cool and froody, so return it
if((BYTEFLAGS(from_file) & BYTEIS_SYNTAX) == 0)
return((char) from_file);
// check special characters ("0x00 TAB LF CR SPC :;}")
switch(from_file) {
case CHAR_TAB:// TAB character
case ' ':
// remember to skip all following blanks
Input_now->state = INPUTSTATE_SKIPBLANKS;
return(' ');
case CHAR_LF:// LF character
// remember to send a start-of-line
Input_now->state = INPUTSTATE_LF;
return(CHAR_EOS);// end of statement
case CHAR_CR:// CR character
// remember to check CRLF + send start-of-line
Input_now->state = INPUTSTATE_CR;
return(CHAR_EOS);// end of statement
case CHAR_EOB:
// remember to send an end-of-block
Input_now->state = INPUTSTATE_EOB;
return(CHAR_EOS);// end of statement
case CHAR_STATEMENT_DELIMITER:
// just deliver an EOS instead
return(CHAR_EOS);// end of statement
case CHAR_COMMENT_SEPARATOR:
// remember to skip remainder of line
Input_now->state = INPUTSTATE_COMMENT;
return(CHAR_EOS);// end of statement
default:
// complain if byte is 0
Throw_error("Source file contains illegal character.");
return((char) from_file);
}
case INPUTSTATE_SKIPBLANKS:
// read until non-blank, then deliver that
do {
// from_file = getc(Input_now->src.fd);
from_file = hacked_getc(Input_now);
} while((from_file == CHAR_TAB) || (from_file == ' '));
// re-process last byte
Input_now->state = INPUTSTATE_AGAIN;
break;
case INPUTSTATE_LF:
// return start-of-line, then continue in normal mode
Input_now->state = INPUTSTATE_NORMAL;
return(CHAR_SOL);// new line
case INPUTSTATE_CR:
// return start-of-line, remember to check for LF
Input_now->state = INPUTSTATE_SKIPLF;
return(CHAR_SOL);// new line
case INPUTSTATE_SKIPLF:
from_file = hacked_getc(Input_now);
// if LF, ignore it and fetch another byte
// otherwise, process current byte
if(from_file == CHAR_LF)
Input_now->state = INPUTSTATE_NORMAL;
else
Input_now->state = INPUTSTATE_AGAIN;
break;
case INPUTSTATE_COMMENT:
// read until end-of-line or end-of-file
do
from_file = hacked_getc(Input_now);
while((from_file != EOF) && (from_file != CHAR_CR) && (from_file != CHAR_LF));
// re-process last byte
Input_now->state = INPUTSTATE_AGAIN;
break;
case INPUTSTATE_EOB:
// deliver EOB
Input_now->state = INPUTSTATE_NORMAL;
return(CHAR_EOB);// end of block
case INPUTSTATE_EOF:
// deliver EOF
Input_now->state = INPUTSTATE_NORMAL;
return(CHAR_EOF);// end of file
default:
Bug_found("StrangeInputMode", Input_now->state);
}
} while(TRUE);
}
// Parse macro call ("+MACROTITLE"). Has to be re-entrant.
void Macro_parse_call(void) // Now GotByte = dot or first char of macro name
{
char local_gotbyte;
struct symbol *symbol;
struct section new_section,
*outer_section;
struct input new_input,
*outer_input;
struct macro *actual_macro;
struct rwnode *macro_node,
*symbol_node;
zone_t macro_zone,
symbol_zone;
int arg_count = 0;
// Enter deeper nesting level
// Quit program if recursion too deep.
if (--macro_recursions_left < 0)
Throw_serious_error("Too deeply nested. Recursive macro calls?");
macro_zone = get_zone_and_title();
// now GotByte = first non-space after title
// internal_name = MacroTitle ARG_SEPARATOR (grows to signature)
// Accept n>=0 comma-separated arguments before CHAR_EOS.
// Valid argument formats are:
// EXPRESSION (everything that does NOT start with '~'
// ~.LOCAL_LABEL_BY_REFERENCE
// ~GLOBAL_LABEL_BY_REFERENCE
// now GotByte = non-space
if (GotByte != CHAR_EOS) { // any at all?
do {
// if arg table cannot take another element, enlarge
if (argtable_size <= arg_count)
enlarge_arg_table();
// Decide whether call-by-reference or call-by-value
// In both cases, GlobalDynaBuf may be used.
if (GotByte == REFERENCE_CHAR) {
// read call-by-reference arg
DynaBuf_append(internal_name, ARGTYPE_NUM_REF);
GetByte(); // skip '~' character
Input_read_zone_and_keyword(&symbol_zone);
// GotByte = illegal char
arg_table[arg_count].symbol = symbol_find(symbol_zone, 0);
} else {
// read call-by-value arg
DynaBuf_append(internal_name, ARGTYPE_NUM_VAL);
ALU_any_result(&(arg_table[arg_count].result));
}
++arg_count;
} while (Input_accept_comma());
}
// now arg_table contains the arguments
// now GlobalDynaBuf = unused
// check for "unknown macro"
// Search for macro. Do not create if not found.
search_for_macro(¯o_node, macro_zone, FALSE);
if (macro_node == NULL) {
Throw_error("Macro not defined (or wrong signature).");
Input_skip_remainder();
} else {
// make macro_node point to the macro struct
actual_macro = macro_node->body;
local_gotbyte = GotByte; // CAUTION - ugly kluge
// set up new input
new_input.original_filename = actual_macro->def_filename;
new_input.line_number = actual_macro->def_line_number;
new_input.source_is_ram = TRUE;
new_input.state = INPUTSTATE_NORMAL; // FIXME - fix others!
new_input.src.ram_ptr = actual_macro->parameter_list;
// remember old input
outer_input = Input_now;
// activate new input
Input_now = &new_input;
// remember old section
outer_section = Section_now;
// start new section (with new zone)
// FALSE = title mustn't be freed
Section_new_zone(&new_section, "Macro", actual_macro->original_name, FALSE);
GetByte(); // fetch first byte of parameter list
// assign arguments
if (GotByte != CHAR_EOS) { // any at all?
arg_count = 0;
do {
// Decide whether call-by-reference
// or call-by-value
// In both cases, GlobalDynaBuf may be used.
if (GotByte == REFERENCE_CHAR) {
// assign call-by-reference arg
GetByte(); // skip '~' character
Input_read_zone_and_keyword(&symbol_zone);
if ((Tree_hard_scan(&symbol_node, symbols_forest, symbol_zone, TRUE) == FALSE)
&& (pass_count == 0))
Throw_error("Macro parameter twice.");
symbol_node->body = arg_table[arg_count].symbol;
} else {
// assign call-by-value arg
Input_read_zone_and_keyword(&symbol_zone);
symbol = symbol_find(symbol_zone, 0);
// FIXME - add a possibility to symbol_find to make it possible to find out
// whether symbol was just created. Then check for the same error message here
// as above ("Macro parameter twice.").
symbol->result = arg_table[arg_count].result;
}
++arg_count;
} while (Input_accept_comma());
}
// and now, finally, parse the actual macro body
Input_now->state = INPUTSTATE_NORMAL; // FIXME - fix others!
// maybe call parse_ram_block(actual_macro->def_line_number, actual_macro->body)
Input_now->src.ram_ptr = actual_macro->body;
Parse_until_eob_or_eof();
if (GotByte != CHAR_EOB)
Bug_found("IllegalBlockTerminator", GotByte);
// end section (free title memory, if needed)
Section_finalize(&new_section);
// restore previous section
Section_now = outer_section;
// restore previous input:
Input_now = outer_input;
// restore old Gotbyte context
GotByte = local_gotbyte; // CAUTION - ugly kluge
Input_ensure_EOS();
}
++macro_recursions_left; // leave this nesting level
}
