2 // RMAC - Reboot's Macro Assembler for all Atari computers
3 // TOKEN.C - Token Handling
4 // Copyright (C) 199x Landon Dyer, 2011-2019 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++);
629 *dst++ = (char)*(tk - 1);
634 // If 'd' != NULL, copy string to destination
638 DEBUG printf("d='%s'\n", d);
657 DEBUG { printf("ExM: dst=\"%s\"\n", dest); }
662 DEBUG { printf("*** OVERFLOW LINE ***\n%s\n", dest); }
663 return fatal("line too long as a result of macro expansion");
668 // Get next line of text from a macro
670 char * GetNextMacroLine(void)
672 IMACRO * imacro = cur_inobj->inobj.imacro;
673 // LONG * strp = imacro->im_nextln;
674 LLIST * strp = imacro->im_nextln;
676 if (strp == NULL) // End-of-macro
679 imacro->im_nextln = strp->next;
680 // ExpandMacro((char *)(strp + 1), imacro->im_lnbuf, LNSIZ);
681 ExpandMacro(strp->line, imacro->im_lnbuf, LNSIZ);
683 return imacro->im_lnbuf;
688 // Get next line of text from a repeat block
690 char * GetNextRepeatLine(void)
692 IREPT * irept = cur_inobj->inobj.irept;
693 // LONG * strp = irept->ir_nextln; // initial null
695 // Do repeat at end of .rept block's string list
697 if (irept->ir_nextln == NULL)
699 DEBUG { printf("back-to-top-of-repeat-block count=%d\n", (int)irept->ir_count); }
700 irept->ir_nextln = irept->ir_firstln; // copy first line
702 if (irept->ir_count-- == 0)
704 DEBUG { printf("end-repeat-block\n"); }
708 // strp = irept->ir_nextln;
710 // Mark the current macro line in the irept object
711 // This is probably overkill - a global variable
712 // would suffice here (it only gets used during
713 // error reporting anyway)
714 irept->lineno = irept->ir_nextln->lineno;
716 // strcpy(irbuf, (char *)(irept->ir_nextln + 1));
717 strcpy(irbuf, irept->ir_nextln->line);
718 DEBUG { printf("repeat line='%s'\n", irbuf); }
719 // irept->ir_nextln = (LONG *)*strp;
720 irept->ir_nextln = irept->ir_nextln->next;
727 // Include a source file used at the root, and for ".include" files
729 int include(int handle, char * fname)
732 DEBUG { printf("[include: %s, cfileno=%u]\n", fname, cfileno); }
734 // Alloc and initialize include-descriptors
735 INOBJ * inobj = a_inobj(SRC_IFILE);
736 IFILE * ifile = inobj->inobj.ifile;
738 ifile->ifhandle = handle; // Setup file handle
739 ifile->ifind = ifile->ifcnt = 0; // Setup buffer indices
740 ifile->ifoldlineno = curlineno; // Save old line number
741 ifile->ifoldfname = curfname; // Save old filename
742 ifile->ifno = cfileno; // Save old file number
744 // NB: This *must* be preincrement, we're adding one to the filecount here!
745 cfileno = ++filecount; // Compute NEW file number
746 curfname = strdup(fname); // Set current filename (alloc storage)
747 curlineno = 0; // Start on line zero
749 // Add another file to the file-record
750 FILEREC * fr = (FILEREC *)malloc(sizeof(FILEREC));
751 fr->frec_next = NULL;
752 fr->frec_name = curfname;
755 filerec = fr; // Add first filerec
757 last_fr->frec_next = fr; // Append to list of filerecs
760 DEBUG { printf("[include: curfname: %s, cfileno=%u]\n", curfname, cfileno); }
767 // Pop the current input level
771 INOBJ * inobj = cur_inobj;
776 // Pop IFENT levels until we reach the conditional assembly context we
777 // were at when the input object was entered.
778 int numUnmatched = 0;
780 while (ifent != inobj->in_ifent)
782 if (d_endif() != 0) // Something bad happened during endif parsing?
783 return -1; // If yes, bail instead of getting stuck in a loop
788 // Give a warning to the user that we had to wipe their bum for them
789 if (numUnmatched > 0)
790 warn("missing %d .endif(s)", numUnmatched);
792 tok = inobj->in_otok; // Restore tok and otok
793 etok = inobj->in_etok;
795 switch (inobj->in_type)
797 case SRC_IFILE: // Pop and release an IFILE
799 DEBUG { printf("[Leaving: %s]\n", curfname); }
801 IFILE * ifile = inobj->inobj.ifile;
802 ifile->if_link = f_ifile;
804 close(ifile->ifhandle); // Close source file
805 DEBUG { printf("[fpop (pre): curfname=%s]\n", curfname); }
806 curfname = ifile->ifoldfname; // Set current filename
807 DEBUG { printf("[fpop (post): curfname=%s]\n", curfname); }
808 DEBUG { printf("[fpop: (pre) cfileno=%d ifile->ifno=%d]\n", (int)cfileno, (int)ifile->ifno); }
809 curlineno = ifile->ifoldlineno; // Set current line#
810 DEBUG { printf("cfileno=%d ifile->ifno=%d\n", (int)cfileno, (int)ifile->ifno); }
811 cfileno = ifile->ifno; // Restore current file number
812 DEBUG { printf("[fpop: (post) cfileno=%d ifile->ifno=%d]\n", (int)cfileno, (int)ifile->ifno); }
816 case SRC_IMACRO: // Pop and release an IMACRO
818 IMACRO * imacro = inobj->inobj.imacro;
819 imacro->im_link = f_imacro;
824 case SRC_IREPT: // Pop and release an IREPT
826 DEBUG { printf("dealloc IREPT\n"); }
827 LLIST * p = inobj->inobj.irept->ir_firstln;
829 // Deallocate repeat lines
840 cur_inobj = inobj->in_link;
841 inobj->in_link = f_inobj;
849 // Get line from file into buf, return NULL on EOF or ptr to the start of a
852 char * GetNextLine(void)
856 int readamt = -1; // 0 if last read() yeilded 0 bytes
857 IFILE * fl = cur_inobj->inobj.ifile;
861 // Scan for next end-of-line; handle stupid text formats by treating
862 // \r\n the same as \n. (lone '\r' at end of buffer means we have to
864 d = &fl->ifbuf[fl->ifind];
866 for(p=d, i=0, j=fl->ifcnt; i<j; i++, p++)
868 if (*p == '\r' || *p == '\n')
875 break; // Need to read more, then look for '\n' to eat
876 else if (p[1] == '\n')
880 // Cover up the newline with end-of-string sentinel
889 // Handle hanging lines by ignoring them (Input file is exhausted, no
890 // \r or \n on last line)
891 // Shamus: This is retarded. Never ignore any input!
892 if (!readamt && fl->ifcnt)
899 // Really should check to see if we're at the end of the buffer!
901 fl->ifbuf[fl->ifind + fl->ifcnt] = '\0';
903 return &fl->ifbuf[fl->ifind];
907 // Truncate and return absurdly long lines.
908 if (fl->ifcnt >= QUANTUM)
910 fl->ifbuf[fl->ifind + fl->ifcnt - 1] = '\0';
912 return &fl->ifbuf[fl->ifind];
915 // Relocate what's left of a line to the beginning of the buffer, and
916 // read some more of the file in; return NULL if the buffer's empty and
920 p = &fl->ifbuf[fl->ifind];
921 d = &fl->ifbuf[fl->ifcnt & 1];
923 for(i=0; i<fl->ifcnt; i++)
926 fl->ifind = fl->ifcnt & 1;
929 readamt = read(fl->ifhandle, &fl->ifbuf[fl->ifind + fl->ifcnt], QUANTUM);
934 if ((fl->ifcnt += readamt) == 0)
943 int TokenizeLine(void)
945 uint8_t * ln = NULL; // Ptr to current position in line
946 uint8_t * p; // Random character ptr
947 PTR tk; // Token-deposit ptr
948 int state = 0; // State for keyword detector
949 int j = 0; // Var for keyword detector
950 uint8_t c; // Random char
951 uint64_t v; // Random value
952 uint32_t cursize = 0; // Current line's size (.b, .w, .l, .s, .q, .d)
953 double f; // Random float
954 uint8_t * nullspot = NULL; // Spot to clobber for SYMBOL termination
955 int stuffnull; // 1:terminate SYMBOL '\0' at *nullspot
957 int stringNum = 0; // Pointer to string locations in tokenized line
961 if (cur_inobj == NULL) // Return EOF if input stack is empty
964 // Get another line of input from the current input source: a file, a
965 // macro, or a repeat-block
966 switch (cur_inobj->in_type)
970 // o bump source line number;
971 // o tag the listing-line with a space;
972 // o kludge lines generated by Alcyon C.
974 if ((ln = GetNextLine()) == NULL)
976 DEBUG { printf("TokenizeLine: Calling fpop() from SRC_IFILE...\n"); }
977 if (fpop() == 0) // Pop input level
978 goto retry; // Try for more lines
981 ifent->if_prev = (IFENT *)-1; //Signal Assemble() that we have reached EOF with unbalanced if/endifs
986 curlineno++; // Bump line number
991 // AS68 compatibility, throw away all lines starting with
992 // back-quotes, tildes, or '*'
993 // On other lines, turn the first '*' into a semi-colon.
994 if (*ln == '`' || *ln == '~' || *ln == '*')
998 for(p=ln; *p!=EOS; p++)
1012 // o Handle end-of-macro;
1013 // o tag the listing-line with an at (@) sign.
1015 if ((ln = GetNextMacroLine()) == NULL)
1017 if (ExitMacro() == 0) // Exit macro (pop args, do fpop(), etc)
1018 goto retry; // Try for more lines...
1020 return TKEOF; // Oops, we got a non zero return code, signal EOF
1027 // o Handle end-of-repeat-block;
1028 // o tag the listing-line with a pound (#) sign.
1030 if ((ln = GetNextRepeatLine()) == NULL)
1032 DEBUG { printf("TokenizeLine: Calling fpop() from SRC_IREPT...\n"); }
1041 // Save text of the line. We only do this during listings and within
1042 // macro-type blocks, since it is expensive to unconditionally copy every
1047 // General housekeeping
1048 tok = tokeol; // Set "tok" to EOL in case of error
1049 tk.u32 = etok; // Reset token ptr
1050 stuffnull = 0; // Don't stuff nulls
1051 totlines++; // Bump total #lines assembled
1053 // See if the entire line is a comment. This is a win if the programmer
1054 // puts in lots of comments
1055 if (*ln == '*' || *ln == ';' || ((*ln == '/') && (*(ln + 1) == '/')))
1058 // And here we have a very ugly hack for signalling a single line 'turn off
1059 // optimization'. There's really no nice way to do this, so hack it is!
1060 optimizeOff = 0; // Default is to take optimizations as they come
1064 optimizeOff = 1; // Signal that we don't want to optimize this line
1065 ln++; // & skip over the darned thing
1068 // Main tokenization loop;
1069 // o skip whitespace;
1070 // o handle end-of-line;
1071 // o handle symbols;
1072 // o handle single-character tokens (operators, etc.);
1073 // o handle multiple-character tokens (constants, strings, etc.).
1076 // Skip whitespace, handle EOL
1077 while (chrtab[*ln] & WHITE)
1080 // Handle EOL, comment with ';'
1081 if (*ln == EOS || *ln == ';'|| ((*ln == '/') && (*(ln + 1) == '/')))
1084 // Handle start of symbol. Symbols are null-terminated in place. The
1085 // termination is always one symbol behind, since there may be no place
1086 // for a null in the case that an operator immediately follows the name.
1091 if (stuffnull) // Terminate old symbol from previous pass
1094 v = 0; // Assume no DOT attrib follows symbol
1097 // In some cases, we need to check for a DOTx at the *beginning*
1098 // of a symbol, as the "start" of the line we're currently looking
1099 // at could be somewhere in the middle of that line!
1102 // Make sure that it's *only* a .[bwsl] following, and not the
1103 // start of a local symbol:
1104 if ((chrtab[*(ln + 1)] & DOT)
1105 && (dotxtab[*(ln + 1)] != 0)
1106 && !(chrtab[*(ln + 2)] & CTSYM))
1108 // We found a legitimate DOTx construct, so add it to the
1112 *tk.u32++ = (TOKEN)dotxtab[*ln++];
1117 p = nullspot = ln++; // Nullspot -> start of this symbol
1119 // Find end of symbol (and compute its length)
1120 for(j=1; (int)chrtab[*ln]&CTSYM; j++)
1123 // Handle "DOT" special forms (like ".b") that follow a normal
1124 // symbol or keyword:
1127 *ln++ = EOS; // Terminate symbol
1128 stuffnull = 0; // And never try it again
1130 // Character following the '.' must have a DOT attribute, and
1131 // the chararacter after THAT one must not have a start-symbol
1132 // attribute (to prevent symbols that look like, for example,
1133 // "zingo.barf", which might be a good idea anyway....)
1134 if (((chrtab[*ln] & DOT) == 0) || (dotxtab[*ln] == 0))
1135 return error("[bwsl] must follow '.' in symbol");
1137 v = (uint32_t)dotxtab[*ln++];
1138 cursize = (uint32_t)v;
1140 if (chrtab[*ln] & CTSYM)
1141 return error("misuse of '.'; not allowed in symbols");
1144 // If the symbol is small, check to see if it's really the name of
1148 for(state=0; state>=0;)
1150 j = (int)tolowertab[*p++];
1153 if (kwcheck[j] != state)
1159 if (*p == EOS || p == ln)
1173 // Make j = -1 if user tries to use a RISC register while in 68K mode
1174 if (!(rgpu || rdsp || dsp56001) && ((TOKEN)j >= KW_R0 && (TOKEN)j <= KW_R31))
1179 // Make j = -1 if time, date etc with no preceeding ^^
1180 // defined, referenced, streq, macdef, date and time
1183 case 112: // defined
1184 case 113: // referenced
1192 // If not tokenized keyword OR token was not found
1193 if ((j < 0) || (state < 0))
1196 string[stringNum] = nullspot;
1197 *tk.u32++ = stringNum;
1202 *tk.u32++ = (TOKEN)j;
1206 if (v) // Record attribute token (if any)
1207 *tk.u32++ = (TOKEN)v;
1209 if (stuffnull) // Arrange for string termination on next pass
1215 // Handle identity tokens
1222 // Handle multiple-character tokens
1227 case '!': // ! or !=
1237 case '\'': // 'string'
1240 // Hardcoded for now, maybe this will change in the future
1241 *tk.u32++ = STRINGA8;
1245 case '\"': // "string"
1249 string[stringNum] = ln;
1250 *tk.u32++ = stringNum;
1253 for(p=ln; *ln!=EOS && *ln!=c1;)
1262 return(error("unterminated string"));
1291 // If we're evaluating a macro
1292 // this is valid because it's
1293 // a parameter expansion
1295 // If we're evaluating a macro
1296 // this is valid and expands to
1300 warn("bad backslash code in string");
1310 return error("unterminated string");
1314 case '$': // $, hex constant
1315 if (chrtab[*ln] & HDIGIT)
1319 // Parse the hex value
1320 while (hextab[*ln] >= 0)
1321 v = (v << 4) + (int)hextab[*ln++];
1328 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1333 else if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1344 case '<': // < or << or <> or <=
1363 case ':': // : or ::
1373 case '=': // = or ==
1376 *tk.u32++ = DEQUALS;
1383 case '>': // > or >> or >=
1398 case '%': // % or binary constant
1399 if (*ln < '0' || *ln > '1')
1407 while (*ln >= '0' && *ln <= '1')
1408 v = (v << 1) + *ln++ - '0';
1412 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1418 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1424 if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1434 case '@': // @ or octal constant
1435 if (*ln < '0' || *ln > '7')
1443 while (*ln >= '0' && *ln <= '7')
1444 v = (v << 3) + *ln++ - '0';
1448 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1454 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1460 if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1470 case '^': // ^ or ^^ <operator-name>
1477 if (((int)chrtab[*++ln] & STSYM) == 0)
1479 error("invalid symbol following ^^");
1485 while ((int)chrtab[*ln] & CTSYM)
1488 for(state=0; state>=0;)
1490 // Get char, convert to lowercase
1493 if (j >= 'A' && j <= 'Z')
1498 if (kwcheck[j] != state)
1504 if (*p == EOS || p == ln)
1513 if (j < 0 || state < 0)
1515 error("unknown symbol following ^^");
1519 *tk.u32++ = (TOKEN)j;
1522 interror(2); // Bad MULTX entry in chrtab
1527 // Handle decimal constant
1530 uint8_t * numStart = ln;
1533 while ((int)chrtab[*ln] & DIGIT)
1534 v = (v * 10) + *ln++ - '0';
1536 // See if there's a .[bwl] after the constant & deal with it if so
1539 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1547 else if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1555 else if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1563 else if ((int)chrtab[*(ln + 1)] & DIGIT)
1565 // Hey, more digits after the dot, so we assume it's a
1566 // floating point number of some kind... numEnd will point
1567 // to the first non-float character after it's done
1570 double f = strtod(numStart, &numEnd);
1571 ln = (uint8_t *)numEnd;
1574 return error("floating point parse error");
1576 // N.B.: We use the C compiler's internal double
1577 // representation for all internal float calcs and
1578 // are reasonably sure that the size of said double
1579 // is 8 bytes long (which we check for in fltpoint.c)
1592 //printf("CONST: %i\n", v);
1596 // Handle illegal character
1597 return error("illegal character $%02X found", *ln);
1600 // Terminate line of tokens and return "success."
1603 tok = etok; // Set tok to beginning of line
1605 if (stuffnull) // Terminate last SYMBOL
1615 // .GOTO <label> goto directive
1617 // The label is searched for starting from the first line of the current,
1618 // enclosing macro definition. If no enclosing macro exists, an error is
1621 // A label is of the form:
1623 // :<name><whitespace>
1625 // The colon must appear in column 1. The label is stripped prior to macro
1626 // expansion, and is NOT subject to macro expansion. The whitespace may also
1629 int d_goto(WORD unused)
1631 // Setup for the search
1633 return error("missing label");
1635 char * sym = string[tok[1]];
1638 if (cur_inobj->in_type != SRC_IMACRO)
1639 return error("goto not in macro");
1641 IMACRO * imacro = cur_inobj->inobj.imacro;
1642 LLIST * defln = imacro->im_macro->lineList;
1644 // Attempt to find the label, starting with the first line.
1645 for(; defln!=NULL; defln=defln->next)
1647 // Must start with a colon
1648 if (defln->line[0] == ':')
1650 // Compare names (sleazo string compare)
1652 char * s2 = defln->line;
1654 // Either we will match the strings to EOS on both, or we will
1655 // match EOS on string 1 to whitespace on string 2. Otherwise, we
1657 while ((*s1 == *s2) || ((*s1 == EOS) && (chrtab[*s2] & WHITE)))
1659 // If we reached the end of string 1 (sym), we're done.
1660 // Note that we're also checking for the end of string 2 as
1661 // well, since we've established they're equal above.
1664 // Found the label, set new macro next-line and return.
1665 imacro->im_nextln = defln;
1675 return error("goto label not found");
1679 void DumpToken(TOKEN t)
1683 else if (t == CONST)
1685 else if (t == FCONST)
1687 else if (t == ACONST)
1689 else if (t == STRING)
1691 else if (t == SYMBOL)
1695 else if (t == TKEOF)
1697 else if (t == DEQUALS)
1698 printf("[DEQUALS]");
1703 else if (t == DCOLON)
1715 else if (t == UNMINUS)
1716 printf("[UNMINUS]");
1731 else if (t == ENDEXPR)
1732 printf("[ENDEXPR]");
1733 else if (t == CR_ABSCOUNT)
1734 printf("[CR_ABSCOUNT]");
1735 else if (t == CR_DEFINED)
1736 printf("[CR_DEFINED]");
1737 else if (t == CR_REFERENCED)
1738 printf("[CR_REFERENCED]");
1739 else if (t == CR_STREQ)
1740 printf("[CR_STREQ]");
1741 else if (t == CR_MACDEF)
1742 printf("[CR_MACDEF]");
1743 else if (t == CR_TIME)
1744 printf("[CR_TIME]");
1745 else if (t == CR_DATE)
1746 printf("[CR_DATE]");
1747 else if (t >= 0x20 && t <= 0x2F)
1748 printf("[%c]", (char)t);
1749 else if (t >= 0x3A && t <= 0x3F)
1750 printf("[%c]", (char)t);
1751 else if (t >= 0x80 && t <= 0x87)
1752 printf("[D%u]", ((uint32_t)t) - 0x80);
1753 else if (t >= 0x88 && t <= 0x8F)
1754 printf("[A%u]", ((uint32_t)t) - 0x88);
1756 printf("[%X:%c]", (uint32_t)t, (char)t);
1760 void DumpTokenBuffer(void)
1762 printf("Tokens [%X]: ", sloc);
1764 for(TOKEN * t=tokbuf; *t!=EOL; t++)
1768 else if (*t == CONST)
1772 printf("[CONST: $%lX]", *tp.u64);
1775 else if (*t == FCONST)
1779 printf("[FCONST: $%lX]", *tp.u64);
1782 else if (*t == ACONST)
1784 printf("[ACONST: $%X, $%X]", (uint32_t)t[1], (uint32_t)t[2]);
1787 else if (*t == STRING)
1790 printf("[STRING:\"%s\"]", string[*t]);
1792 else if (*t == SYMBOL)
1795 printf("[SYMBOL:\"%s\"]", string[*t]);
1799 else if (*t == TKEOF)
1801 else if (*t == DEQUALS)
1802 printf("[DEQUALS]");
1807 else if (*t == DCOLON)
1819 else if (*t == UNMINUS)
1820 printf("[UNMINUS]");
1821 else if (*t == DOTB)
1823 else if (*t == DOTW)
1825 else if (*t == DOTL)
1827 else if (*t == DOTQ)
1829 else if (*t == DOTS)
1831 else if (*t == DOTD)
1833 else if (*t == DOTI)
1835 else if (*t == ENDEXPR)
1836 printf("[ENDEXPR]");
1837 else if (*t == CR_ABSCOUNT)
1838 printf("[CR_ABSCOUNT]");
1839 else if (*t == CR_DEFINED)
1840 printf("[CR_DEFINED]");
1841 else if (*t == CR_REFERENCED)
1842 printf("[CR_REFERENCED]");
1843 else if (*t == CR_STREQ)
1844 printf("[CR_STREQ]");
1845 else if (*t == CR_MACDEF)
1846 printf("[CR_MACDEF]");
1847 else if (*t == CR_TIME)
1848 printf("[CR_TIME]");
1849 else if (*t == CR_DATE)
1850 printf("[CR_DATE]");
1851 else if (*t >= 0x20 && *t <= 0x2F)
1852 printf("[%c]", (char)*t);
1853 else if (*t >= 0x3A && *t <= 0x3F)
1854 printf("[%c]", (char)*t);
1855 else if (*t >= 0x80 && *t <= 0x87)
1856 printf("[D%u]", ((uint32_t)*t) - 0x80);
1857 else if (*t >= 0x88 && *t <= 0x8F)
1858 printf("[A%u]", ((uint32_t)*t) - 0x88);
1860 printf("[%X:%c]", (uint32_t)*t, (char)*t);