2 // RMAC - Reboot's Macro Assembler for all Atari computers
3 // TOKEN.C - Token Handling
4 // Copyright (C) 199x Landon Dyer, 2011-2020 Reboot and Friends
5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
6 // Source utilised with the kind permission of Landon Dyer
19 #define DECL_KW // Declare keyword arrays
20 #define DEF_KW // Declare keyword values
21 #include "kwtab.h" // Incl generated keyword tables & defs
24 int lnsave; // 1; strcpy() text of current line
25 uint16_t curlineno; // Current line number (64K max currently)
26 int totlines; // Total # of lines
27 int mjump_align = 0; // mjump alignment flag
28 char lntag; // Line tag
29 char * curfname; // Current filename
30 char tolowertab[128]; // Uppercase ==> lowercase
31 int8_t hextab[128]; // Table of hex values
32 char dotxtab[128]; // Table for ".b", ".s", etc.
33 char irbuf[LNSIZ]; // Text for .rept block line
34 char lnbuf[LNSIZ]; // Text of current line
35 WORD filecount; // Unique file number counter
36 WORD cfileno; // Current file number
37 TOKEN * tok; // Ptr to current token
38 TOKEN * etok; // Ptr past last token in tokbuf[]
39 TOKEN tokeol[1] = {EOL}; // Bailout end-of-line token
40 char * string[TOKBUFSIZE*2];// Token buffer string pointer storage
41 int optimizeOff; // Optimization override flag
43 // File record, used to maintain a list of every include file ever visited
44 #define FILEREC struct _filerec
54 INOBJ * cur_inobj; // Ptr current input obj (IFILE/IMACRO)
55 static INOBJ * f_inobj; // Ptr list of free INOBJs
56 static IFILE * f_ifile; // Ptr list of free IFILEs
57 static IMACRO * f_imacro; // Ptr list of free IMACROs
59 static TOKEN tokbuf[TOKBUFSIZE]; // Token buffer (stack-like, all files)
61 uint8_t chrtab[0x100] = {
62 ILLEG, ILLEG, ILLEG, ILLEG, // NUL SOH STX ETX
63 ILLEG, ILLEG, ILLEG, ILLEG, // EOT ENQ ACK BEL
64 ILLEG, WHITE, ILLEG, ILLEG, // BS HT LF VT
65 WHITE, ILLEG, ILLEG, ILLEG, // FF CR SO SI
67 ILLEG, ILLEG, ILLEG, ILLEG, // DLE DC1 DC2 DC3
68 ILLEG, ILLEG, ILLEG, ILLEG, // DC4 NAK SYN ETB
69 ILLEG, ILLEG, ILLEG, ILLEG, // CAN EM SUB ESC
70 ILLEG, ILLEG, ILLEG, ILLEG, // FS GS RS US
72 WHITE, MULTX, MULTX, SELF, // SP ! " #
73 MULTX+CTSYM, MULTX, SELF, MULTX, // $ % & '
74 SELF, SELF, SELF, SELF, // ( ) * +
75 SELF, SELF, STSYM, SELF, // , - . /
77 DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM, // 0 1
78 DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM, // 2 3
79 DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM, // 4 5
80 DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM, // 6 7
81 DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM, // 8 9
83 MULTX, MULTX, MULTX, STSYM+CTSYM, // < = > ?
85 MULTX, STSYM+CTSYM+HDIGIT, // @ A
86 DOT+STSYM+CTSYM+HDIGIT, STSYM+CTSYM+HDIGIT, // B C
87 DOT+STSYM+CTSYM+HDIGIT, STSYM+CTSYM+HDIGIT, // D E
88 STSYM+CTSYM+HDIGIT, STSYM+CTSYM, // F G
89 STSYM+CTSYM, DOT+STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, // H I J K
90 DOT+STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, // L M N O
92 DOT+STSYM+CTSYM, DOT+STSYM+CTSYM, STSYM+CTSYM, DOT+STSYM+CTSYM, // P Q R S
93 STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, DOT+STSYM+CTSYM, // T U V W
94 STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, SELF,// X Y Z [
95 SELF, SELF, MULTX, STSYM+CTSYM, // \ ] ^ _
97 ILLEG, STSYM+CTSYM+HDIGIT, // ` a
98 DOT+STSYM+CTSYM+HDIGIT, STSYM+CTSYM+HDIGIT, // b c
99 DOT+STSYM+CTSYM+HDIGIT, STSYM+CTSYM+HDIGIT, // d e
100 STSYM+CTSYM+HDIGIT, STSYM+CTSYM, // f g
101 STSYM+CTSYM, DOT+STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, // h i j k
102 DOT+STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, // l m n o
104 DOT+STSYM+CTSYM, DOT+STSYM+CTSYM, STSYM+CTSYM, DOT+STSYM+CTSYM, // p q r s
105 STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, DOT+STSYM+CTSYM, // t u v w
106 DOT+STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, SELF, // x y z {
107 SELF, SELF, SELF, ILLEG, // | } ~ DEL
109 // Anything above $7F is illegal (and yes, we need to check for this,
110 // otherwise you get strange and spurious errors that will lead you astray)
111 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
112 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
113 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
114 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
115 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
116 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
117 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
118 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
119 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
120 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
121 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
122 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
123 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
124 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
125 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG,
126 ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG, ILLEG
129 // Names of registers
130 static char * regname[] = {
131 "d0","d1","d2","d3","d4","d5","d6","d7", // 128,135
132 "a0","a1","a2","a3","a4","a5","a6","sp", // 136,143
133 "ssp","pc","sr","ccr","regequ","set","reg","r0", // 144,151
134 "r1","r2","r3","r4","r5","r6","r7","r8", // 152,159
135 "r9","r10","r11","r12","r13","r14","r15","r16", // 160,167
136 "r17","r18","r19","r20","r21","r22","r23","r24", // 168,175
137 "r25","r26","r27","r28","r29","r30","r31","ccdef", // 176,183
138 "usp","ic40","dc40","bc40","sfc","dfc","","vbr", // 184,191
139 "cacr","caar","msp","isp","tc","itt0","itt1","dtt0", // 192,199
140 "dtt1","mmusr","urp","srp","iacr0","iacr1","dacr0","dacr1", // 200,207
141 "tt0","tt1","crp","","","","","", // 208,215
142 "","","","","fpiar","fpsr","fpcr","", // 216,223
143 "fp0","fp1","fp2","fp3","fp4","fp5","fp6","fp7", // 224,231
144 "","","","","","","","", // 232,239
145 "","","","","","","","", // 240,247
146 "","","","","","","","", // 248,255
147 "","","","","x0","x1","y0","y1", // 256,263
148 "","b0","","b2","","b1","a","b", // 264,271
149 "mr","omr","la","lc","ssh","ssl","ss","", // 272,279
150 "n0","n1","n2","n3","n4","n5","n6","n7", // 280,287
151 "m0","m1","m2","m3","m4","m5","m6","m7", // 288,295
152 "","","","","","","l","p", // 296,303
153 "mr","omr","la","lc","ssh","ssl","ss","", // 304,311
154 "a10","b10","x","y","","","ab","ba" // 312,319
157 static char * riscregname[] = {
158 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
159 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
160 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
161 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
166 // Initialize tokenizer
168 void InitTokenizer(void)
171 char * htab = "0123456789abcdefABCDEF"; // Hex character table
173 lnsave = 0; // Don't save lines
174 curfname = ""; // No file, empty filename
175 filecount = (WORD)-1;
176 cfileno = (WORD)-1; // cfileno gets bumped to 0
188 // Initialize hex, "dot" and tolower tables
193 tolowertab[i] = (char)i;
196 for(i=0; htab[i]!=EOS; i++)
197 hextab[htab[i]] = (char)((i < 16) ? i : i - 6);
199 for(i='A'; i<='Z'; i++)
200 tolowertab[i] |= 0x20;
202 // These characters are legal immediately after a period
203 dotxtab['b'] = DOTB; // .b .B .s .S
205 //dotxtab['s'] = DOTB;
206 //dotxtab['S'] = DOTB;
207 dotxtab['w'] = DOTW; // .w .W
209 dotxtab['l'] = DOTL; // .l .L
211 dotxtab['i'] = DOTI; // .i .I (WTF is this???)
213 dotxtab['D'] = DOTD; // .d .D (double)
215 dotxtab['S'] = DOTS; // .s .S
217 dotxtab['Q'] = DOTQ; // .q .Q (quad word)
219 dotxtab['X'] = DOTX; // .x .x
221 dotxtab['P'] = DOTP; // .p .P
226 void SetFilenameForErrorReporting(void)
230 // Check for absolute top filename (this should never happen)
233 curfname = "(*top*)";
237 FILEREC * fr = filerec;
239 // Advance to the correct record...
240 while (fr != NULL && fnum != 0)
246 // Check for file # record not found (this should never happen either)
249 curfname = "(*NOT FOUND*)";
253 curfname = fr->frec_name;
258 // Allocate an IFILE or IMACRO
260 INOBJ * a_inobj(int typ)
266 // Allocate and initialize INOBJ first
268 inobj = malloc(sizeof(INOBJ));
272 f_inobj = f_inobj->in_link;
277 case SRC_IFILE: // Alloc and init an IFILE
279 ifile = malloc(sizeof(IFILE));
283 f_ifile = f_ifile->if_link;
286 inobj->inobj.ifile = ifile;
289 case SRC_IMACRO: // Alloc and init an IMACRO
290 if (f_imacro == NULL)
291 imacro = malloc(sizeof(IMACRO));
295 f_imacro = f_imacro->im_link;
298 inobj->inobj.imacro = imacro;
301 case SRC_IREPT: // Alloc and init an IREPT
302 inobj->inobj.irept = malloc(sizeof(IREPT));
303 DEBUG { printf("alloc IREPT\n"); }
307 // Install INOBJ on top of input stack
308 inobj->in_ifent = ifent; // Record .if context on entry
309 inobj->in_type = (WORD)typ;
310 inobj->in_otok = tok;
311 inobj->in_etok = etok;
312 inobj->in_link = cur_inobj;
320 // Perform macro substitution from 'orig' to 'dest'. Return OK or some error.
321 // A macro reference is in one of two forms:
322 // \name <non-name-character>
324 // A doubled backslash (\\) is compressed to a single backslash (\).
325 // Argument definitions have been pre-tokenized, so we have to turn them back
326 // into text. This means that numbers, in particular, become hex, regardless of
327 // their representation when the macro was invoked. This is a hack.
328 // A label may appear at the beginning of the line:
329 // :<name><whitespace>
330 // (the colon must be in the first column). These labels are stripped before
331 // macro expansion takes place.
333 int ExpandMacro(char * src, char * dest, int destsiz)
336 int questmark; // \? for testing argument existence
337 char mname[128]; // Assume max size of a formal arg name
338 char numbuf[20]; // Buffer for text of CONSTs
341 char ** symbolString;
343 DEBUG { printf("ExM: src=\"%s\"\n", src); }
345 IMACRO * imacro = cur_inobj->inobj.imacro;
346 int macnum = (int)(imacro->im_macro->sattr);
348 char * dst = dest; // Next dest slot
349 char * edst = dest + destsiz - 1; // End + 1(?) of dest buffer
351 // Check for (and skip over) any "label" on the line
357 while (*s != EOS && !(chrtab[*s] & WHITE))
361 s++; // Skip first whitespace
364 // Expand the rest of the line
367 // Copy single character
373 // Skip comments in case a loose @ or \ is in there
374 // In that case the tokeniser was trying to expand it.
375 if ((*s == ';') || ((*s == '/') && (*(s + 1) == '/')))
380 // Do macro expansion
388 case '\\': // \\, \ (collapse to single backslash)
394 case '?': // \? <macro> set `questmark' flag
398 case '#': // \#, number of arguments
399 sprintf(numbuf, "%d", (int)imacro->im_nargs);
401 case '!': // \! size suffix supplied on invocation
402 switch ((int)imacro->im_siz)
404 case SIZN: d = ""; break;
405 case SIZB: d = ".b"; break;
406 case SIZW: d = ".w"; break;
407 case SIZL: d = ".l"; break;
411 case '~': // ==> unique label string Mnnnn...
412 sprintf(numbuf, "M%u", curuniq);
428 return error("missing argument name");
431 // \n ==> argument number 'n', 0..9
432 if (chrtab[*s] & DIGIT)
442 // Get argument name: \name, \{name}
452 while (chrtab[*s] & CTSYM);
457 for(++s; *s != EOS && *s != '}';)
461 return error("missing closing brace ('}')");
468 // Lookup the argument and copy its (string) value into the
469 // destination string
470 DEBUG { printf("argument='%s'\n", mname); }
472 if ((arg = lookup(mname, MACARG, macnum)) == NULL)
473 return error("undefined argument: '%s'", mname);
476 // Convert a string of tokens (terminated with EOL) back into
477 // text. If an argument is out of range (not specified in the
478 // macro invocation) then it is ignored.
479 i = (int)arg->svalue;
481 DEBUG { printf("~argnumber=%d\n", i); }
484 if (i < imacro->im_nargs)
486 tk = imacro->argument[i].token;
487 symbolString = imacro->argument[i].string;
490 // printf("ExM: Preparing to parse argument #%u...\n", i);
496 // 0 if the argument is empty or non-existant,
497 // 1 if the argument is not empty
500 if (tk == NULL || *tk == EOL)
506 *dst++ = (char)(questmark + '0');
510 // Argument # is in range, so expand it
515 // Reverse-translation from a token number to a string.
516 // This is a hack. It might be better table-driven.
519 if ((*tk >= KW_D0) && !rdsp && !rgpu)
521 d = regname[(int)*tk++ - KW_D0];
524 else if ((*tk >= KW_R0) && (*tk <= KW_R31))
526 d = riscregname[(int)*tk++ - KW_R0];
534 d = symbolString[*tk++];
535 DEBUG { printf("ExM: SYMBOL=\"%s\"", d); }
538 d = symbolString[*tk++];
559 // Shamus: Changing the format specifier from %lx to %ux caused the assembler
560 // to choke on legitimate code... Need to investigate this further
561 // before changing anything else here!
563 // sprintf(numbuf, "$%lx", (uint64_t)*tk++);
564 sprintf(numbuf, "$%" PRIX64, (uint64_t)*tk++);
632 *dst++ = (char)*(tk - 1);
637 // If 'd' != NULL, copy string to destination
641 DEBUG printf("d='%s'\n", d);
660 DEBUG { printf("ExM: dst=\"%s\"\n", dest); }
665 DEBUG { printf("*** OVERFLOW LINE ***\n%s\n", dest); }
666 return fatal("line too long as a result of macro expansion");
671 // Get next line of text from a macro
673 char * GetNextMacroLine(void)
675 IMACRO * imacro = cur_inobj->inobj.imacro;
676 // LONG * strp = imacro->im_nextln;
677 LLIST * strp = imacro->im_nextln;
679 if (strp == NULL) // End-of-macro
682 imacro->im_nextln = strp->next;
683 // ExpandMacro((char *)(strp + 1), imacro->im_lnbuf, LNSIZ);
684 ExpandMacro(strp->line, imacro->im_lnbuf, LNSIZ);
686 return imacro->im_lnbuf;
691 // Get next line of text from a repeat block
693 char * GetNextRepeatLine(void)
695 IREPT * irept = cur_inobj->inobj.irept;
696 // LONG * strp = irept->ir_nextln; // initial null
698 // Do repeat at end of .rept block's string list
700 if (irept->ir_nextln == NULL)
702 DEBUG { printf("back-to-top-of-repeat-block count=%d\n", (int)irept->ir_count); }
703 irept->ir_nextln = irept->ir_firstln; // copy first line
705 if (irept->ir_count-- == 0)
707 DEBUG { printf("end-repeat-block\n"); }
711 // strp = irept->ir_nextln;
713 // Mark the current macro line in the irept object
714 // This is probably overkill - a global variable
715 // would suffice here (it only gets used during
716 // error reporting anyway)
717 irept->lineno = irept->ir_nextln->lineno;
719 // strcpy(irbuf, (char *)(irept->ir_nextln + 1));
720 strcpy(irbuf, irept->ir_nextln->line);
721 DEBUG { printf("repeat line='%s'\n", irbuf); }
722 // irept->ir_nextln = (LONG *)*strp;
723 irept->ir_nextln = irept->ir_nextln->next;
730 // Include a source file used at the root, and for ".include" files
732 int include(int handle, char * fname)
735 DEBUG { printf("[include: %s, cfileno=%u]\n", fname, cfileno); }
737 // Alloc and initialize include-descriptors
738 INOBJ * inobj = a_inobj(SRC_IFILE);
739 IFILE * ifile = inobj->inobj.ifile;
741 ifile->ifhandle = handle; // Setup file handle
742 ifile->ifind = ifile->ifcnt = 0; // Setup buffer indices
743 ifile->ifoldlineno = curlineno; // Save old line number
744 ifile->ifoldfname = curfname; // Save old filename
745 ifile->ifno = cfileno; // Save old file number
747 // NB: This *must* be preincrement, we're adding one to the filecount here!
748 cfileno = ++filecount; // Compute NEW file number
749 curfname = strdup(fname); // Set current filename (alloc storage)
750 curlineno = 0; // Start on line zero
752 // Add another file to the file-record
753 FILEREC * fr = (FILEREC *)malloc(sizeof(FILEREC));
754 fr->frec_next = NULL;
755 fr->frec_name = curfname;
758 filerec = fr; // Add first filerec
760 last_fr->frec_next = fr; // Append to list of filerecs
763 DEBUG { printf("[include: curfname: %s, cfileno=%u]\n", curfname, cfileno); }
770 // Pop the current input level
774 INOBJ * inobj = cur_inobj;
779 // Pop IFENT levels until we reach the conditional assembly context we
780 // were at when the input object was entered.
781 int numUnmatched = 0;
783 while (ifent != inobj->in_ifent)
785 if (d_endif() != 0) // Something bad happened during endif parsing?
786 return -1; // If yes, bail instead of getting stuck in a loop
791 // Give a warning to the user that we had to wipe their bum for them
792 if (numUnmatched > 0)
793 warn("missing %d .endif(s)", numUnmatched);
795 tok = inobj->in_otok; // Restore tok and otok
796 etok = inobj->in_etok;
798 switch (inobj->in_type)
800 case SRC_IFILE: // Pop and release an IFILE
802 DEBUG { printf("[Leaving: %s]\n", curfname); }
804 IFILE * ifile = inobj->inobj.ifile;
805 ifile->if_link = f_ifile;
807 close(ifile->ifhandle); // Close source file
808 DEBUG { printf("[fpop (pre): curfname=%s]\n", curfname); }
809 curfname = ifile->ifoldfname; // Set current filename
810 DEBUG { printf("[fpop (post): curfname=%s]\n", curfname); }
811 DEBUG { printf("[fpop: (pre) cfileno=%d ifile->ifno=%d]\n", (int)cfileno, (int)ifile->ifno); }
812 curlineno = ifile->ifoldlineno; // Set current line#
813 DEBUG { printf("cfileno=%d ifile->ifno=%d\n", (int)cfileno, (int)ifile->ifno); }
814 cfileno = ifile->ifno; // Restore current file number
815 DEBUG { printf("[fpop: (post) cfileno=%d ifile->ifno=%d]\n", (int)cfileno, (int)ifile->ifno); }
819 case SRC_IMACRO: // Pop and release an IMACRO
821 IMACRO * imacro = inobj->inobj.imacro;
822 imacro->im_link = f_imacro;
827 case SRC_IREPT: // Pop and release an IREPT
829 DEBUG { printf("dealloc IREPT\n"); }
830 LLIST * p = inobj->inobj.irept->ir_firstln;
832 // Deallocate repeat lines
843 cur_inobj = inobj->in_link;
844 inobj->in_link = f_inobj;
852 // Get line from file into buf, return NULL on EOF or ptr to the start of a
855 char * GetNextLine(void)
859 int readamt = -1; // 0 if last read() yeilded 0 bytes
860 IFILE * fl = cur_inobj->inobj.ifile;
864 // Scan for next end-of-line; handle stupid text formats by treating
865 // \r\n the same as \n. (lone '\r' at end of buffer means we have to
867 d = &fl->ifbuf[fl->ifind];
869 for(p=d, i=0, j=fl->ifcnt; i<j; i++, p++)
871 if (*p == '\r' || *p == '\n')
878 break; // Need to read more, then look for '\n' to eat
879 else if (p[1] == '\n')
883 // Cover up the newline with end-of-string sentinel
892 // Handle hanging lines by ignoring them (Input file is exhausted, no
893 // \r or \n on last line)
894 // Shamus: This is retarded. Never ignore any input!
895 if (!readamt && fl->ifcnt)
902 // Really should check to see if we're at the end of the buffer!
904 fl->ifbuf[fl->ifind + fl->ifcnt] = '\0';
906 return &fl->ifbuf[fl->ifind];
910 // Truncate and return absurdly long lines.
911 if (fl->ifcnt >= QUANTUM)
913 fl->ifbuf[fl->ifind + fl->ifcnt - 1] = '\0';
915 return &fl->ifbuf[fl->ifind];
918 // Relocate what's left of a line to the beginning of the buffer, and
919 // read some more of the file in; return NULL if the buffer's empty and
923 p = &fl->ifbuf[fl->ifind];
924 d = &fl->ifbuf[fl->ifcnt & 1];
926 for(i=0; i<fl->ifcnt; i++)
929 fl->ifind = fl->ifcnt & 1;
932 readamt = read(fl->ifhandle, &fl->ifbuf[fl->ifind + fl->ifcnt], QUANTUM);
937 if ((fl->ifcnt += readamt) == 0)
946 int TokenizeLine(void)
948 uint8_t * ln = NULL; // Ptr to current position in line
949 uint8_t * p; // Random character ptr
950 PTR tk; // Token-deposit ptr
951 int state = 0; // State for keyword detector
952 int j = 0; // Var for keyword detector
953 uint8_t c; // Random char
954 uint64_t v; // Random value
955 uint32_t cursize = 0; // Current line's size (.b, .w, .l, .s, .q, .d)
956 uint8_t * nullspot = NULL; // Spot to clobber for SYMBOL termination
957 int stuffnull; // 1:terminate SYMBOL '\0' at *nullspot
959 int stringNum = 0; // Pointer to string locations in tokenized line
963 if (cur_inobj == NULL) // Return EOF if input stack is empty
966 // Get another line of input from the current input source: a file, a
967 // macro, or a repeat-block
968 switch (cur_inobj->in_type)
972 // o bump source line number;
973 // o tag the listing-line with a space;
974 // o kludge lines generated by Alcyon C.
976 if ((ln = GetNextLine()) == NULL)
978 DEBUG { printf("TokenizeLine: Calling fpop() from SRC_IFILE...\n"); }
979 if (fpop() == 0) // Pop input level
980 goto retry; // Try for more lines
983 ifent->if_prev = (IFENT *)-1; //Signal Assemble() that we have reached EOF with unbalanced if/endifs
988 curlineno++; // Bump line number
993 // AS68 compatibility, throw away all lines starting with
994 // back-quotes, tildes, or '*'
995 // On other lines, turn the first '*' into a semi-colon.
996 if (*ln == '`' || *ln == '~' || *ln == '*')
1000 for(p=ln; *p!=EOS; p++)
1014 // o Handle end-of-macro;
1015 // o tag the listing-line with an at (@) sign.
1017 if ((ln = GetNextMacroLine()) == NULL)
1019 if (ExitMacro() == 0) // Exit macro (pop args, do fpop(), etc)
1020 goto retry; // Try for more lines...
1022 return TKEOF; // Oops, we got a non zero return code, signal EOF
1029 // o Handle end-of-repeat-block;
1030 // o tag the listing-line with a pound (#) sign.
1032 if ((ln = GetNextRepeatLine()) == NULL)
1034 DEBUG { printf("TokenizeLine: Calling fpop() from SRC_IREPT...\n"); }
1043 // Save text of the line. We only do this during listings and within
1044 // macro-type blocks, since it is expensive to unconditionally copy every
1049 // General housekeeping
1050 tok = tokeol; // Set "tok" to EOL in case of error
1051 tk.u32 = etok; // Reset token ptr
1052 stuffnull = 0; // Don't stuff nulls
1053 totlines++; // Bump total #lines assembled
1055 // See if the entire line is a comment. This is a win if the programmer
1056 // puts in lots of comments
1057 if (*ln == '*' || *ln == ';' || ((*ln == '/') && (*(ln + 1) == '/')))
1060 // And here we have a very ugly hack for signalling a single line 'turn off
1061 // optimization'. There's really no nice way to do this, so hack it is!
1062 optimizeOff = 0; // Default is to take optimizations as they come
1066 optimizeOff = 1; // Signal that we don't want to optimize this line
1067 ln++; // & skip over the darned thing
1070 // Main tokenization loop;
1071 // o skip whitespace;
1072 // o handle end-of-line;
1073 // o handle symbols;
1074 // o handle single-character tokens (operators, etc.);
1075 // o handle multiple-character tokens (constants, strings, etc.).
1078 // Skip whitespace, handle EOL
1079 while (chrtab[*ln] & WHITE)
1082 // Handle EOL, comment with ';'
1083 if (*ln == EOS || *ln == ';'|| ((*ln == '/') && (*(ln + 1) == '/')))
1086 // Handle start of symbol. Symbols are null-terminated in place. The
1087 // termination is always one symbol behind, since there may be no place
1088 // for a null in the case that an operator immediately follows the name.
1093 if (stuffnull) // Terminate old symbol from previous pass
1096 v = 0; // Assume no DOT attrib follows symbol
1099 // In some cases, we need to check for a DOTx at the *beginning*
1100 // of a symbol, as the "start" of the line we're currently looking
1101 // at could be somewhere in the middle of that line!
1104 // Make sure that it's *only* a .[bwsl] following, and not the
1105 // start of a local symbol:
1106 if ((chrtab[*(ln + 1)] & DOT)
1107 && (dotxtab[*(ln + 1)] != 0)
1108 && !(chrtab[*(ln + 2)] & CTSYM))
1110 // We found a legitimate DOTx construct, so add it to the
1114 *tk.u32++ = (TOKEN)dotxtab[*ln++];
1119 p = nullspot = ln++; // Nullspot -> start of this symbol
1121 // Find end of symbol (and compute its length)
1122 for(j=1; (int)chrtab[*ln]&CTSYM; j++)
1125 // Handle "DOT" special forms (like ".b") that follow a normal
1126 // symbol or keyword:
1129 *ln++ = EOS; // Terminate symbol
1130 stuffnull = 0; // And never try it again
1132 // Character following the '.' must have a DOT attribute, and
1133 // the chararacter after THAT one must not have a start-symbol
1134 // attribute (to prevent symbols that look like, for example,
1135 // "zingo.barf", which might be a good idea anyway....)
1136 if (((chrtab[*ln] & DOT) == 0) || (dotxtab[*ln] == 0))
1137 return error("[bwsl] must follow '.' in symbol");
1139 v = (uint32_t)dotxtab[*ln++];
1140 cursize = (uint32_t)v;
1142 if (chrtab[*ln] & CTSYM)
1143 return error("misuse of '.'; not allowed in symbols");
1146 // If the symbol is small, check to see if it's really the name of
1150 for(state=0; state>=0;)
1152 j = (int)tolowertab[*p++];
1155 if (kwcheck[j] != state)
1161 if (*p == EOS || p == ln)
1175 // Make j = -1 if user tries to use a RISC register while in 68K mode
1176 if (!(rgpu || rdsp || dsp56001) && ((TOKEN)j >= KW_R0 && (TOKEN)j <= KW_R31))
1181 // Make j = -1 if time, date etc with no preceeding ^^
1182 // defined, referenced, streq, macdef, date and time
1185 case 112: // defined
1186 case 113: // referenced
1194 // If not tokenized keyword OR token was not found
1195 if ((j < 0) || (state < 0))
1198 string[stringNum] = nullspot;
1199 *tk.u32++ = stringNum;
1204 *tk.u32++ = (TOKEN)j;
1208 if (v) // Record attribute token (if any)
1209 *tk.u32++ = (TOKEN)v;
1211 if (stuffnull) // Arrange for string termination on next pass
1217 // Handle identity tokens
1224 // Handle multiple-character tokens
1229 case '!': // ! or !=
1239 case '\'': // 'string'
1242 // Hardcoded for now, maybe this will change in the future
1243 *tk.u32++ = STRINGA8;
1247 case '\"': // "string"
1251 string[stringNum] = ln;
1252 *tk.u32++ = stringNum;
1255 for(p=ln; *ln!=EOS && *ln!=c1;)
1264 return(error("unterminated string"));
1293 // If we're evaluating a macro
1294 // this is valid because it's
1295 // a parameter expansion
1297 // If we're evaluating a macro
1298 // this is valid and expands to
1302 warn("bad backslash code in string");
1312 return error("unterminated string");
1316 case '$': // $, hex constant
1317 if (chrtab[*ln] & HDIGIT)
1321 // Parse the hex value
1322 while (hextab[*ln] >= 0)
1323 v = (v << 4) + (int)hextab[*ln++];
1330 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1335 else if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1346 case '<': // < or << or <> or <=
1365 case ':': // : or ::
1375 case '=': // = or ==
1378 *tk.u32++ = DEQUALS;
1385 case '>': // > or >> or >=
1400 case '%': // % or binary constant
1401 if (*ln < '0' || *ln > '1')
1409 while (*ln >= '0' && *ln <= '1')
1410 v = (v << 1) + *ln++ - '0';
1414 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1420 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1426 if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1436 case '@': // @ or octal constant
1437 if (*ln < '0' || *ln > '7')
1445 while (*ln >= '0' && *ln <= '7')
1446 v = (v << 3) + *ln++ - '0';
1450 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1456 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1462 if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1472 case '^': // ^ or ^^ <operator-name>
1479 if (((int)chrtab[*++ln] & STSYM) == 0)
1481 error("invalid symbol following ^^");
1487 while ((int)chrtab[*ln] & CTSYM)
1490 for(state=0; state>=0;)
1492 // Get char, convert to lowercase
1495 if (j >= 'A' && j <= 'Z')
1500 if (kwcheck[j] != state)
1506 if (*p == EOS || p == ln)
1515 if (j < 0 || state < 0)
1517 error("unknown symbol following ^^");
1521 *tk.u32++ = (TOKEN)j;
1524 interror(2); // Bad MULTX entry in chrtab
1529 // Handle decimal constant
1532 uint8_t * numStart = ln;
1535 while ((int)chrtab[*ln] & DIGIT)
1536 v = (v * 10) + *ln++ - '0';
1538 // See if there's a .[bwl] after the constant & deal with it if so
1541 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1549 else if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1557 else if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1565 else if ((int)chrtab[*(ln + 1)] & DIGIT)
1567 // Hey, more digits after the dot, so we assume it's a
1568 // floating point number of some kind... numEnd will point
1569 // to the first non-float character after it's done
1572 double f = strtod(numStart, &numEnd);
1573 ln = (uint8_t *)numEnd;
1576 return error("floating point parse error");
1578 // N.B.: We use the C compiler's internal double
1579 // representation for all internal float calcs and
1580 // are reasonably sure that the size of said double
1581 // is 8 bytes long (which we check for in fltpoint.c)
1594 //printf("CONST: %i\n", v);
1598 // Handle illegal character
1599 return error("illegal character $%02X found", *ln);
1602 // Terminate line of tokens and return "success."
1605 tok = etok; // Set tok to beginning of line
1607 if (stuffnull) // Terminate last SYMBOL
1617 // .GOTO <label> goto directive
1619 // The label is searched for starting from the first line of the current,
1620 // enclosing macro definition. If no enclosing macro exists, an error is
1623 // A label is of the form:
1625 // :<name><whitespace>
1627 // The colon must appear in column 1. The label is stripped prior to macro
1628 // expansion, and is NOT subject to macro expansion. The whitespace may also
1631 int d_goto(WORD unused)
1633 // Setup for the search
1635 return error("missing label");
1637 char * sym = string[tok[1]];
1640 if (cur_inobj->in_type != SRC_IMACRO)
1641 return error("goto not in macro");
1643 IMACRO * imacro = cur_inobj->inobj.imacro;
1644 LLIST * defln = imacro->im_macro->lineList;
1646 // Attempt to find the label, starting with the first line.
1647 for(; defln!=NULL; defln=defln->next)
1649 // Must start with a colon
1650 if (defln->line[0] == ':')
1652 // Compare names (sleazo string compare)
1654 char * s2 = defln->line;
1656 // Either we will match the strings to EOS on both, or we will
1657 // match EOS on string 1 to whitespace on string 2. Otherwise, we
1659 while ((*s1 == *s2) || ((*s1 == EOS) && (chrtab[*s2] & WHITE)))
1661 // If we reached the end of string 1 (sym), we're done.
1662 // Note that we're also checking for the end of string 2 as
1663 // well, since we've established they're equal above.
1666 // Found the label, set new macro next-line and return.
1667 imacro->im_nextln = defln;
1677 return error("goto label not found");
1681 void DumpToken(TOKEN t)
1685 else if (t == CONST)
1687 else if (t == FCONST)
1689 else if (t == ACONST)
1691 else if (t == STRING)
1693 else if (t == SYMBOL)
1697 else if (t == TKEOF)
1699 else if (t == DEQUALS)
1700 printf("[DEQUALS]");
1705 else if (t == DCOLON)
1717 else if (t == UNMINUS)
1718 printf("[UNMINUS]");
1733 else if (t == ENDEXPR)
1734 printf("[ENDEXPR]");
1735 else if (t == CR_ABSCOUNT)
1736 printf("[CR_ABSCOUNT]");
1737 else if (t == CR_FILESIZE)
1738 printf("[CR_FILESIZE]");
1739 else if (t == CR_DEFINED)
1740 printf("[CR_DEFINED]");
1741 else if (t == CR_REFERENCED)
1742 printf("[CR_REFERENCED]");
1743 else if (t == CR_STREQ)
1744 printf("[CR_STREQ]");
1745 else if (t == CR_MACDEF)
1746 printf("[CR_MACDEF]");
1747 else if (t == CR_TIME)
1748 printf("[CR_TIME]");
1749 else if (t == CR_DATE)
1750 printf("[CR_DATE]");
1751 else if (t >= 0x20 && t <= 0x2F)
1752 printf("[%c]", (char)t);
1753 else if (t >= 0x3A && t <= 0x3F)
1754 printf("[%c]", (char)t);
1755 else if (t >= 0x80 && t <= 0x87)
1756 printf("[D%u]", ((uint32_t)t) - 0x80);
1757 else if (t >= 0x88 && t <= 0x8F)
1758 printf("[A%u]", ((uint32_t)t) - 0x88);
1760 printf("[%X:%c]", (uint32_t)t, (char)t);
1764 void DumpTokenBuffer(void)
1766 printf("Tokens [%X]: ", sloc);
1768 for(TOKEN * t=tokbuf; *t!=EOL; t++)
1772 else if (*t == CONST)
1776 printf("[CONST: $%lX]", *tp.u64);
1779 else if (*t == FCONST)
1783 printf("[FCONST: $%lX]", *tp.u64);
1786 else if (*t == ACONST)
1788 printf("[ACONST: $%X, $%X]", (uint32_t)t[1], (uint32_t)t[2]);
1791 else if (*t == STRING)
1794 printf("[STRING:\"%s\"]", string[*t]);
1796 else if (*t == SYMBOL)
1799 printf("[SYMBOL:\"%s\"]", string[*t]);
1803 else if (*t == TKEOF)
1805 else if (*t == DEQUALS)
1806 printf("[DEQUALS]");
1811 else if (*t == DCOLON)
1823 else if (*t == UNMINUS)
1824 printf("[UNMINUS]");
1825 else if (*t == DOTB)
1827 else if (*t == DOTW)
1829 else if (*t == DOTL)
1831 else if (*t == DOTQ)
1833 else if (*t == DOTS)
1835 else if (*t == DOTD)
1837 else if (*t == DOTI)
1839 else if (*t == ENDEXPR)
1840 printf("[ENDEXPR]");
1841 else if (*t == CR_ABSCOUNT)
1842 printf("[CR_ABSCOUNT]");
1843 else if (*t == CR_FILESIZE)
1844 printf("[CR_FILESIZE]");
1845 else if (*t == CR_DEFINED)
1846 printf("[CR_DEFINED]");
1847 else if (*t == CR_REFERENCED)
1848 printf("[CR_REFERENCED]");
1849 else if (*t == CR_STREQ)
1850 printf("[CR_STREQ]");
1851 else if (*t == CR_MACDEF)
1852 printf("[CR_MACDEF]");
1853 else if (*t == CR_TIME)
1854 printf("[CR_TIME]");
1855 else if (*t == CR_DATE)
1856 printf("[CR_DATE]");
1857 else if (*t >= 0x20 && *t <= 0x2F)
1858 printf("[%c]", (char)*t);
1859 else if (*t >= 0x3A && *t <= 0x3F)
1860 printf("[%c]", (char)*t);
1861 else if (*t >= 0x80 && *t <= 0x87)
1862 printf("[D%u]", ((uint32_t)*t) - 0x80);
1863 else if (*t >= 0x88 && *t <= 0x8F)
1864 printf("[A%u]", ((uint32_t)*t) - 0x88);
1866 printf("[%X:%c]", (uint32_t)*t, (char)*t);