2 // RMAC - Reboot's Macro Assembler for all Atari computers
3 // TOKEN.C - Token Handling
4 // Copyright (C) 199x Landon Dyer, 2011-2018 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++);
628 *dst++ = (char)*(tk - 1);
633 // If 'd' != NULL, copy string to destination
637 DEBUG printf("d='%s'\n", d);
656 DEBUG { printf("ExM: dst=\"%s\"\n", dest); }
661 DEBUG { printf("*** OVERFLOW LINE ***\n%s\n", dest); }
662 return fatal("line too long as a result of macro expansion");
667 // Get next line of text from a macro
669 char * GetNextMacroLine(void)
671 IMACRO * imacro = cur_inobj->inobj.imacro;
672 // LONG * strp = imacro->im_nextln;
673 LLIST * strp = imacro->im_nextln;
675 if (strp == NULL) // End-of-macro
678 imacro->im_nextln = strp->next;
679 // ExpandMacro((char *)(strp + 1), imacro->im_lnbuf, LNSIZ);
680 ExpandMacro(strp->line, imacro->im_lnbuf, LNSIZ);
682 return imacro->im_lnbuf;
687 // Get next line of text from a repeat block
689 char * GetNextRepeatLine(void)
691 IREPT * irept = cur_inobj->inobj.irept;
692 // LONG * strp = irept->ir_nextln; // initial null
694 // Do repeat at end of .rept block's string list
696 if (irept->ir_nextln == NULL)
698 DEBUG { printf("back-to-top-of-repeat-block count=%d\n", (int)irept->ir_count); }
699 irept->ir_nextln = irept->ir_firstln; // copy first line
701 if (irept->ir_count-- == 0)
703 DEBUG { printf("end-repeat-block\n"); }
707 // strp = irept->ir_nextln;
709 // Mark the current macro line in the irept object
710 // This is probably overkill - a global variable
711 // would suffice here (it only gets used during
712 // error reporting anyway)
713 irept->lineno = irept->ir_nextln->lineno;
715 // strcpy(irbuf, (char *)(irept->ir_nextln + 1));
716 strcpy(irbuf, irept->ir_nextln->line);
717 DEBUG { printf("repeat line='%s'\n", irbuf); }
718 // irept->ir_nextln = (LONG *)*strp;
719 irept->ir_nextln = irept->ir_nextln->next;
726 // Include a source file used at the root, and for ".include" files
728 int include(int handle, char * fname)
731 DEBUG { printf("[include: %s, cfileno=%u]\n", fname, cfileno); }
733 // Alloc and initialize include-descriptors
734 INOBJ * inobj = a_inobj(SRC_IFILE);
735 IFILE * ifile = inobj->inobj.ifile;
737 ifile->ifhandle = handle; // Setup file handle
738 ifile->ifind = ifile->ifcnt = 0; // Setup buffer indices
739 ifile->ifoldlineno = curlineno; // Save old line number
740 ifile->ifoldfname = curfname; // Save old filename
741 ifile->ifno = cfileno; // Save old file number
743 // NB: This *must* be preincrement, we're adding one to the filecount here!
744 cfileno = ++filecount; // Compute NEW file number
745 curfname = strdup(fname); // Set current filename (alloc storage)
746 curlineno = 0; // Start on line zero
748 // Add another file to the file-record
749 FILEREC * fr = (FILEREC *)malloc(sizeof(FILEREC));
750 fr->frec_next = NULL;
751 fr->frec_name = curfname;
754 filerec = fr; // Add first filerec
756 last_fr->frec_next = fr; // Append to list of filerecs
759 DEBUG { printf("[include: curfname: %s, cfileno=%u]\n", curfname, cfileno); }
766 // Pop the current input level
770 INOBJ * inobj = cur_inobj;
775 // Pop IFENT levels until we reach the conditional assembly context we
776 // were at when the input object was entered.
777 int numUnmatched = 0;
779 while (ifent != inobj->in_ifent)
781 if (d_endif() != 0) // Something bad happened during endif parsing?
782 return -1; // If yes, bail instead of getting stuck in a loop
787 // Give a warning to the user that we had to wipe their bum for them
788 if (numUnmatched > 0)
789 warn("missing %d .endif(s)", numUnmatched);
791 tok = inobj->in_otok; // Restore tok and otok
792 etok = inobj->in_etok;
794 switch (inobj->in_type)
796 case SRC_IFILE: // Pop and release an IFILE
798 DEBUG { printf("[Leaving: %s]\n", curfname); }
800 IFILE * ifile = inobj->inobj.ifile;
801 ifile->if_link = f_ifile;
803 close(ifile->ifhandle); // Close source file
804 DEBUG { printf("[fpop (pre): curfname=%s]\n", curfname); }
805 curfname = ifile->ifoldfname; // Set current filename
806 DEBUG { printf("[fpop (post): curfname=%s]\n", curfname); }
807 DEBUG { printf("[fpop: (pre) cfileno=%d ifile->ifno=%d]\n", (int)cfileno, (int)ifile->ifno); }
808 curlineno = ifile->ifoldlineno; // Set current line#
809 DEBUG { printf("cfileno=%d ifile->ifno=%d\n", (int)cfileno, (int)ifile->ifno); }
810 cfileno = ifile->ifno; // Restore current file number
811 DEBUG { printf("[fpop: (post) cfileno=%d ifile->ifno=%d]\n", (int)cfileno, (int)ifile->ifno); }
815 case SRC_IMACRO: // Pop and release an IMACRO
817 IMACRO * imacro = inobj->inobj.imacro;
818 imacro->im_link = f_imacro;
823 case SRC_IREPT: // Pop and release an IREPT
825 DEBUG { printf("dealloc IREPT\n"); }
826 LLIST * p = inobj->inobj.irept->ir_firstln;
828 // Deallocate repeat lines
839 cur_inobj = inobj->in_link;
840 inobj->in_link = f_inobj;
848 // Get line from file into buf, return NULL on EOF or ptr to the start of a
851 char * GetNextLine(void)
855 int readamt = -1; // 0 if last read() yeilded 0 bytes
856 IFILE * fl = cur_inobj->inobj.ifile;
860 // Scan for next end-of-line; handle stupid text formats by treating
861 // \r\n the same as \n. (lone '\r' at end of buffer means we have to
863 d = &fl->ifbuf[fl->ifind];
865 for(p=d, i=0, j=fl->ifcnt; i<j; i++, p++)
867 if (*p == '\r' || *p == '\n')
874 break; // Need to read more, then look for '\n' to eat
875 else if (p[1] == '\n')
879 // Cover up the newline with end-of-string sentinel
888 // Handle hanging lines by ignoring them (Input file is exhausted, no
889 // \r or \n on last line)
890 // Shamus: This is retarded. Never ignore any input!
891 if (!readamt && fl->ifcnt)
898 // Really should check to see if we're at the end of the buffer!
900 fl->ifbuf[fl->ifind + fl->ifcnt] = '\0';
902 return &fl->ifbuf[fl->ifind];
906 // Truncate and return absurdly long lines.
907 if (fl->ifcnt >= QUANTUM)
909 fl->ifbuf[fl->ifind + fl->ifcnt - 1] = '\0';
911 return &fl->ifbuf[fl->ifind];
914 // Relocate what's left of a line to the beginning of the buffer, and
915 // read some more of the file in; return NULL if the buffer's empty and
919 p = &fl->ifbuf[fl->ifind];
920 d = &fl->ifbuf[fl->ifcnt & 1];
922 for(i=0; i<fl->ifcnt; i++)
925 fl->ifind = fl->ifcnt & 1;
928 readamt = read(fl->ifhandle, &fl->ifbuf[fl->ifind + fl->ifcnt], QUANTUM);
933 if ((fl->ifcnt += readamt) == 0)
942 int TokenizeLine(void)
944 uint8_t * ln = NULL; // Ptr to current position in line
945 uint8_t * p; // Random character ptr
946 PTR tk; // Token-deposit ptr
947 int state = 0; // State for keyword detector
948 int j = 0; // Var for keyword detector
949 uint8_t c; // Random char
950 uint64_t v; // Random value
951 uint32_t cursize = 0; // Current line's size (.b, .w, .l, .s, .q, .d)
952 double f; // Random float
953 uint8_t * nullspot = NULL; // Spot to clobber for SYMBOL termination
954 int stuffnull; // 1:terminate SYMBOL '\0' at *nullspot
956 int stringNum = 0; // Pointer to string locations in tokenized line
960 if (cur_inobj == NULL) // Return EOF if input stack is empty
963 // Get another line of input from the current input source: a file, a
964 // macro, or a repeat-block
965 switch (cur_inobj->in_type)
969 // o bump source line number;
970 // o tag the listing-line with a space;
971 // o kludge lines generated by Alcyon C.
973 if ((ln = GetNextLine()) == NULL)
975 DEBUG { printf("TokenizeLine: Calling fpop() from SRC_IFILE...\n"); }
976 if (fpop() == 0) // Pop input level
977 goto retry; // Try for more lines
980 ifent->if_prev = (IFENT *)-1; //Signal Assemble() that we have reached EOF with unbalanced if/endifs
985 curlineno++; // Bump line number
990 // AS68 compatibility, throw away all lines starting with
991 // back-quotes, tildes, or '*'
992 // On other lines, turn the first '*' into a semi-colon.
993 if (*ln == '`' || *ln == '~' || *ln == '*')
997 for(p=ln; *p!=EOS; p++)
1011 // o Handle end-of-macro;
1012 // o tag the listing-line with an at (@) sign.
1014 if ((ln = GetNextMacroLine()) == NULL)
1016 if (ExitMacro() == 0) // Exit macro (pop args, do fpop(), etc)
1017 goto retry; // Try for more lines...
1019 return TKEOF; // Oops, we got a non zero return code, signal EOF
1026 // o Handle end-of-repeat-block;
1027 // o tag the listing-line with a pound (#) sign.
1029 if ((ln = GetNextRepeatLine()) == NULL)
1031 DEBUG { printf("TokenizeLine: Calling fpop() from SRC_IREPT...\n"); }
1040 // Save text of the line. We only do this during listings and within
1041 // macro-type blocks, since it is expensive to unconditionally copy every
1046 // General housekeeping
1047 tok = tokeol; // Set "tok" to EOL in case of error
1048 tk.u32 = etok; // Reset token ptr
1049 stuffnull = 0; // Don't stuff nulls
1050 totlines++; // Bump total #lines assembled
1052 // See if the entire line is a comment. This is a win if the programmer
1053 // puts in lots of comments
1054 if (*ln == '*' || *ln == ';' || ((*ln == '/') && (*(ln + 1) == '/')))
1057 // And here we have a very ugly hack for signalling a single line 'turn off
1058 // optimization'. There's really no nice way to do this, so hack it is!
1059 optimizeOff = 0; // Default is to take optimizations as they come
1063 optimizeOff = 1; // Signal that we don't want to optimize this line
1064 ln++; // & skip over the darned thing
1067 // Main tokenization loop;
1068 // o skip whitespace;
1069 // o handle end-of-line;
1070 // o handle symbols;
1071 // o handle single-character tokens (operators, etc.);
1072 // o handle multiple-character tokens (constants, strings, etc.).
1075 // Skip whitespace, handle EOL
1076 while (chrtab[*ln] & WHITE)
1079 // Handle EOL, comment with ';'
1080 if (*ln == EOS || *ln == ';'|| ((*ln == '/') && (*(ln + 1) == '/')))
1083 // Handle start of symbol. Symbols are null-terminated in place. The
1084 // termination is always one symbol behind, since there may be no place
1085 // for a null in the case that an operator immediately follows the name.
1090 if (stuffnull) // Terminate old symbol from previous pass
1093 v = 0; // Assume no DOT attrib follows symbol
1096 // In some cases, we need to check for a DOTx at the *beginning*
1097 // of a symbol, as the "start" of the line we're currently looking
1098 // at could be somewhere in the middle of that line!
1101 // Make sure that it's *only* a .[bwsl] following, and not the
1102 // start of a local symbol:
1103 if ((chrtab[*(ln + 1)] & DOT)
1104 && (dotxtab[*(ln + 1)] != 0)
1105 && !(chrtab[*(ln + 2)] & CTSYM))
1107 // We found a legitimate DOTx construct, so add it to the
1111 *tk.u32++ = (TOKEN)dotxtab[*ln++];
1116 p = nullspot = ln++; // Nullspot -> start of this symbol
1118 // Find end of symbol (and compute its length)
1119 for(j=1; (int)chrtab[*ln]&CTSYM; j++)
1122 // Handle "DOT" special forms (like ".b") that follow a normal
1123 // symbol or keyword:
1126 *ln++ = EOS; // Terminate symbol
1127 stuffnull = 0; // And never try it again
1129 // Character following the '.' must have a DOT attribute, and
1130 // the chararacter after THAT one must not have a start-symbol
1131 // attribute (to prevent symbols that look like, for example,
1132 // "zingo.barf", which might be a good idea anyway....)
1133 if (((chrtab[*ln] & DOT) == 0) || (dotxtab[*ln] == 0))
1134 return error("[bwsl] must follow '.' in symbol");
1136 v = (uint32_t)dotxtab[*ln++];
1137 cursize = (uint32_t)v;
1139 if (chrtab[*ln] & CTSYM)
1140 return error("misuse of '.'; not allowed in symbols");
1143 // If the symbol is small, check to see if it's really the name of
1147 for(state=0; state>=0;)
1149 j = (int)tolowertab[*p++];
1152 if (kwcheck[j] != state)
1158 if (*p == EOS || p == ln)
1172 // Make j = -1 if user tries to use a RISC register while in 68K mode
1173 if (!(rgpu || rdsp) && ((TOKEN)j >= KW_R0 && (TOKEN)j <= KW_R31))
1178 // Make j = -1 if time, date etc with no preceeding ^^
1179 // defined, referenced, streq, macdef, date and time
1182 case 112: // defined
1183 case 113: // referenced
1191 // If not tokenized keyword OR token was not found
1192 if ((j < 0) || (state < 0))
1195 string[stringNum] = nullspot;
1196 *tk.u32++ = stringNum;
1201 *tk.u32++ = (TOKEN)j;
1205 if (v) // Record attribute token (if any)
1206 *tk.u32++ = (TOKEN)v;
1208 if (stuffnull) // Arrange for string termination on next pass
1214 // Handle identity tokens
1221 // Handle multiple-character tokens
1226 case '!': // ! or !=
1236 case '\'': // 'string'
1239 // Hardcoded for now, maybe this will change in the future
1240 *tk.u32++ = STRINGA8;
1244 case '\"': // "string"
1248 string[stringNum] = ln;
1249 *tk.u32++ = stringNum;
1252 for(p=ln; *ln!=EOS && *ln!=c1;)
1261 return(error("unterminated string"));
1290 // If we're evaluating a macro
1291 // this is valid and expands to
1295 warn("bad backslash code in string");
1305 return error("unterminated string");
1309 case '$': // $, hex constant
1310 if (chrtab[*ln] & HDIGIT)
1314 // Parse the hex value
1315 while (hextab[*ln] >= 0)
1316 v = (v << 4) + (int)hextab[*ln++];
1320 if (obj_format == BSD)
1322 if ((*(ln + 1) & 0xDF) == 'B')
1327 else if ((*(ln + 1) & 0xDF) == 'W')
1332 else if ((*(ln + 1) & 0xDF) == 'L')
1343 if (obj_format == ALCYON)
1347 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1352 else if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1364 case '<': // < or << or <> or <=
1383 case ':': // : or ::
1393 case '=': // = or ==
1396 *tk.u32++ = DEQUALS;
1403 case '>': // > or >> or >=
1418 case '%': // % or binary constant
1419 if (*ln < '0' || *ln > '1')
1427 while (*ln >= '0' && *ln <= '1')
1428 v = (v << 1) + *ln++ - '0';
1432 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1438 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1444 if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1454 case '@': // @ or octal constant
1455 if (*ln < '0' || *ln > '7')
1463 while (*ln >= '0' && *ln <= '7')
1464 v = (v << 3) + *ln++ - '0';
1468 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1474 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1480 if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1490 case '^': // ^ or ^^ <operator-name>
1497 if (((int)chrtab[*++ln] & STSYM) == 0)
1499 error("invalid symbol following ^^");
1505 while ((int)chrtab[*ln] & CTSYM)
1508 for(state=0; state>=0;)
1510 // Get char, convert to lowercase
1513 if (j >= 'A' && j <= 'Z')
1518 if (kwcheck[j] != state)
1524 if (*p == EOS || p == ln)
1533 if (j < 0 || state < 0)
1535 error("unknown symbol following ^^");
1539 *tk.u32++ = (TOKEN)j;
1542 interror(2); // Bad MULTX entry in chrtab
1547 // Handle decimal constant
1550 uint8_t * numStart = ln;
1553 while ((int)chrtab[*ln] & DIGIT)
1554 v = (v * 10) + *ln++ - '0';
1556 // See if there's a .[bwl] after the constant & deal with it if so
1559 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1567 else if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1575 else if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1583 else if ((int)chrtab[*(ln + 1)] & DIGIT)
1585 // Hey, more digits after the dot, so we assume it's a
1586 // floating point number of some kind... numEnd will point
1587 // to the first non-float character after it's done
1590 double f = strtod(numStart, &numEnd);
1591 ln = (uint8_t *)numEnd;
1594 return error("floating point parse error");
1596 // N.B.: We use the C compiler's internal double
1597 // representation for all internal float calcs and
1598 // are reasonably sure that the size of said double
1599 // is 8 bytes long (which we check for in fltpoint.c)
1612 //printf("CONST: %i\n", v);
1616 // Handle illegal character
1617 return error("illegal character $%02X found", *ln);
1620 // Terminate line of tokens and return "success."
1623 tok = etok; // Set tok to beginning of line
1625 if (stuffnull) // Terminate last SYMBOL
1635 // .GOTO <label> goto directive
1637 // The label is searched for starting from the first line of the current,
1638 // enclosing macro definition. If no enclosing macro exists, an error is
1641 // A label is of the form:
1643 // :<name><whitespace>
1645 // The colon must appear in column 1. The label is stripped prior to macro
1646 // expansion, and is NOT subject to macro expansion. The whitespace may also
1649 int d_goto(WORD unused)
1651 // Setup for the search
1653 return error("missing label");
1655 char * sym = string[tok[1]];
1658 if (cur_inobj->in_type != SRC_IMACRO)
1659 return error("goto not in macro");
1661 IMACRO * imacro = cur_inobj->inobj.imacro;
1662 LLIST * defln = imacro->im_macro->lineList;
1664 // Attempt to find the label, starting with the first line.
1665 for(; defln!=NULL; defln=defln->next)
1667 // Must start with a colon
1668 if (defln->line[0] == ':')
1670 // Compare names (sleazo string compare)
1672 char * s2 = defln->line;
1674 // Either we will match the strings to EOS on both, or we will
1675 // match EOS on string 1 to whitespace on string 2. Otherwise, we
1677 while ((*s1 == *s2) || ((*s1 == EOS) && (chrtab[*s2] & WHITE)))
1679 // If we reached the end of string 1 (sym), we're done.
1680 // Note that we're also checking for the end of string 2 as
1681 // well, since we've established they're equal above.
1684 // Found the label, set new macro next-line and return.
1685 imacro->im_nextln = defln;
1695 return error("goto label not found");
1699 void DumpToken(TOKEN t)
1703 else if (t == CONST)
1705 else if (t == FCONST)
1707 else if (t == ACONST)
1709 else if (t == STRING)
1711 else if (t == SYMBOL)
1715 else if (t == TKEOF)
1717 else if (t == DEQUALS)
1718 printf("[DEQUALS]");
1723 else if (t == DCOLON)
1735 else if (t == UNMINUS)
1736 printf("[UNMINUS]");
1751 else if (t == ENDEXPR)
1752 printf("[ENDEXPR]");
1753 else if (t == CR_ABSCOUNT)
1754 printf("[CR_ABSCOUNT]");
1755 else if (t == CR_DEFINED)
1756 printf("[CR_DEFINED]");
1757 else if (t == CR_REFERENCED)
1758 printf("[CR_REFERENCED]");
1759 else if (t == CR_STREQ)
1760 printf("[CR_STREQ]");
1761 else if (t == CR_MACDEF)
1762 printf("[CR_MACDEF]");
1763 else if (t == CR_TIME)
1764 printf("[CR_TIME]");
1765 else if (t == CR_DATE)
1766 printf("[CR_DATE]");
1767 else if (t >= 0x20 && t <= 0x2F)
1768 printf("[%c]", (char)t);
1769 else if (t >= 0x3A && t <= 0x3F)
1770 printf("[%c]", (char)t);
1771 else if (t >= 0x80 && t <= 0x87)
1772 printf("[D%u]", ((uint32_t)t) - 0x80);
1773 else if (t >= 0x88 && t <= 0x8F)
1774 printf("[A%u]", ((uint32_t)t) - 0x88);
1776 printf("[%X:%c]", (uint32_t)t, (char)t);
1780 void DumpTokenBuffer(void)
1782 printf("Tokens [%X]: ", sloc);
1784 for(TOKEN * t=tokbuf; *t!=EOL; t++)
1788 else if (*t == CONST)
1792 printf("[CONST: $%lX]", *tp.u64);
1795 else if (*t == FCONST)
1799 printf("[FCONST: $%lX]", *tp.u64);
1802 else if (*t == ACONST)
1804 printf("[ACONST: $%X, $%X]", (uint32_t)t[1], (uint32_t)t[2]);
1807 else if (*t == STRING)
1810 printf("[STRING:\"%s\"]", string[*t]);
1812 else if (*t == SYMBOL)
1815 printf("[SYMBOL:\"%s\"]", string[*t]);
1819 else if (*t == TKEOF)
1821 else if (*t == DEQUALS)
1822 printf("[DEQUALS]");
1827 else if (*t == DCOLON)
1839 else if (*t == UNMINUS)
1840 printf("[UNMINUS]");
1841 else if (*t == DOTB)
1843 else if (*t == DOTW)
1845 else if (*t == DOTL)
1847 else if (*t == DOTQ)
1849 else if (*t == DOTS)
1851 else if (*t == DOTD)
1853 else if (*t == DOTI)
1855 else if (*t == ENDEXPR)
1856 printf("[ENDEXPR]");
1857 else if (*t == CR_ABSCOUNT)
1858 printf("[CR_ABSCOUNT]");
1859 else if (*t == CR_DEFINED)
1860 printf("[CR_DEFINED]");
1861 else if (*t == CR_REFERENCED)
1862 printf("[CR_REFERENCED]");
1863 else if (*t == CR_STREQ)
1864 printf("[CR_STREQ]");
1865 else if (*t == CR_MACDEF)
1866 printf("[CR_MACDEF]");
1867 else if (*t == CR_TIME)
1868 printf("[CR_TIME]");
1869 else if (*t == CR_DATE)
1870 printf("[CR_DATE]");
1871 else if (*t >= 0x20 && *t <= 0x2F)
1872 printf("[%c]", (char)*t);
1873 else if (*t >= 0x3A && *t <= 0x3F)
1874 printf("[%c]", (char)*t);
1875 else if (*t >= 0x80 && *t <= 0x87)
1876 printf("[D%u]", ((uint32_t)*t) - 0x80);
1877 else if (*t >= 0x88 && *t <= 0x8F)
1878 printf("[A%u]", ((uint32_t)*t) - 0x88);
1880 printf("[%X:%c]", (uint32_t)*t, (char)*t);