2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
3 // SYMBOL.C - Symbol Handling
4 // Copyright (C) 199x Landon Dyer, 2011-2012 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
16 #define NBUCKETS 256 // Number of hash buckets (power of 2)
18 static SYM * symbolTable[NBUCKETS]; // User symbol-table header
19 int curenv; // Current enviroment number
20 static SYM * sorder; // * -> Symbols, in order of reference
21 static SYM * sordtail; // * -> Last symbol in sorder list
22 static SYM * sdecl; // * -> Symbols, in order of declaration
23 static SYM * sdecltail; // * -> Last symbol in sdecl list
24 static uint32_t currentUID; // Symbol UID tracking (done by NewSymbol())
26 // Tags for marking symbol spaces
32 static char tdb_text[8] = {
33 'a', 't', 'd', '!', 'b', SPACE, SPACE, SPACE
38 // Initialize symbol table
40 void InitSymbolTable(void)
44 for(i=0; i<NBUCKETS; i++) // Initialise symbol hash table
45 symbolTable[i] = NULL;
47 curenv = 1; // Init local symbol enviroment
48 sorder = NULL; // Init symbol-reference list
50 sdecl = NULL; // Init symbol-decl list
57 // Hash the print name and enviroment number
59 int HashSymbol(char * name, int envno)
61 int sum, k = 0; // Hash calculation
63 for(sum=envno; *name; name++)
71 return sum & (NBUCKETS - 1);
76 // Make a new symbol of type `type' in enviroment `envno'
78 SYM * NewSymbol(char * name, int type, int envno)
80 // Allocate the symbol
81 SYM * symbol = malloc(sizeof(SYM));
85 printf("NewSymbol: MALLOC ERROR (symbol=\"%s\")\n", name);
90 symbol->sname = strdup(name);
91 symbol->stype = (BYTE)type;
92 symbol->senv = (WORD)envno;
94 // Don't do this, it could be a forward reference!
95 // symbol->sattr = DEFINED; // We just defined it...
96 // This is a bad assumption. Not every symbol 1st seen in a RISC section is
98 // symbol->sattre = (rgpu || rdsp ? RISCSYM : 0);
101 symbol->sorder = NULL;
102 symbol->uid = currentUID++;
104 // Install symbol in symbol table
105 int hash = HashSymbol(name, envno);
106 symbol->snext = symbolTable[hash];
107 symbolTable[hash] = symbol;
109 // Append symbol to symbol-order list
111 sorder = symbol; // Add first symbol
113 sordtail->sorder = symbol; // Or append to tail of list
121 // Look up the symbol name by its UID and return the pointer to the name.
122 // If it's not found, return NULL.
124 char * GetSymbolNameByUID(uint32_t uid)
126 //problem is with string lookup, that's why we're writing this
127 //so once this is written, we can put the uid in the token stream
129 // A much better approach to the symbol order list would be to make an
130 // array--that way you can do away with the UIDs and all the rest, and
131 // simply do an array lookup based on position. But meh, let's do this for
132 // now until we can rewrite things so they make sense.
133 SYM * symbol = sorder;
135 for(; symbol; symbol=symbol->sorder)
137 if (symbol->uid == uid)
138 return symbol->sname;
146 // Lookup the symbol `name', of the specified type, with the specified
149 SYM * lookup(char * name, int type, int envno)
151 SYM * symbol = symbolTable[HashSymbol(name, envno)];
153 // Do linear-search for symbol in bucket
154 while (symbol != NULL)
156 if (symbol->stype == type // Type, envno and name must match
157 && symbol->senv == envno
158 && *name == *symbol->sname // Fast check for first character
159 && !strcmp(name, symbol->sname)) // More expensive check
162 symbol = symbol->snext;
165 // Return NULL or matching symbol
171 // Put symbol on "order-of-declaration" list of symbols
173 void AddToSymbolDeclarationList(SYM * symbol)
175 // Don't add if already on list, or it's an equated register/CC
176 if ((symbol->sattr & SDECLLIST)
177 || (symbol->sattre & (EQUATEDREG | UNDEF_EQUR | EQUATEDCC | UNDEF_CC)))
180 // Mark as "on .sdecl list"
181 symbol->sattr |= SDECLLIST;
184 sdecl = symbol; // First on decl-list
186 sdecltail->sdecl = symbol; // Add to end of list
188 // Fix up list's tail
189 symbol->sdecl = NULL;
195 // Make all referenced, undefined symbols global
197 void ForceUndefinedSymbolsGlobal(void)
201 DEBUG printf("~ForceUndefinedSymbolsGlobal()\n");
203 // Scan through all symbols;
204 // If a symbol is REFERENCED but not DEFINED, then make it global.
205 for(sy=sorder; sy!=NULL; sy=sy->sorder)
207 if (sy->stype == LABEL && sy->senv == 0
208 && ((sy->sattr & (REFERENCED | DEFINED)) == REFERENCED))
215 // Convert string to uppercase
217 int uc_string(char * s)
221 if (*s >= 'a' && *s <= 'z')
230 // Assign numbers to symbols that are to be exported or imported. The symbol
231 // number is put in `.senv'. Return the number of symbols that will be in the
234 int sy_assign(char * buf, char *(* constr)())
241 // Append all symbols not appearing on the .sdecl list to the end of
243 for(sy=sorder; sy!=NULL; sy=sy->sorder)
244 AddToSymbolDeclarationList(sy);
247 // Run through all symbols (now on the .sdecl list) and assign numbers to
248 // them. We also pick which symbols should be global or not here.
249 for(sy=sdecl; sy!=NULL; sy=sy->sdecl)
251 // Don't want register/CC or undefined on our list
252 //these should already be rejected above...
253 // if (sy->sattre & (EQUATEDREG | UNDEF_EQUR | EQUATEDCC | UNDEF_CC)))
256 // Export or import external references, and export COMMON blocks.
257 if ((sy->stype == LABEL)
258 && ((sy->sattr & (GLOBAL | DEFINED)) == (GLOBAL | DEFINED)
259 || (sy->sattr & (GLOBAL | REFERENCED)) == (GLOBAL | REFERENCED))
260 || (sy->sattr & COMMON))
262 sy->senv = (WORD)scount++;
265 buf = (*constr)(buf, sy, 1);
267 // Export vanilla labels (but don't make them global). An exception is
268 // made for equates, which are not exported unless they are referenced.
269 else if (sy->stype == LABEL && lsym_flag
270 && (sy->sattr & (DEFINED | REFERENCED)) != 0
271 && (!as68_flag || *sy->sname != 'L'))
273 sy->senv = (WORD)scount++;
276 buf = (*constr)(buf, sy, 0);
285 // Generate symbol table for listing file
306 colhei = pagelen - 5;
308 // Allocate storage for list headers and partition all labels.
309 // Throw away macros and macro arguments.
310 sy = (SYM **)malloc(128 * sizeof(LONG));
315 for(i=0; i<NBUCKETS; ++i)
317 for(p=symbolTable[i]; p!=NULL; p=k)
324 if ((p->stype != LABEL) || (p->sattre & UNDEF_EQUR))
327 for(q=sy[j]; q!=NULL; q=q->snext)
329 if (strcmp(p->sname, q->sname) < 0)
337 // Insert at front of list
343 // Insert in middle or append to list
350 // Link all symbols onto one list again
355 if ((r = sy[i]) != NULL)
362 while (q->snext != NULL)
371 strcpy(subttl, "Symbol Table");
379 for(j=0; j<colhei; ++j)
388 for(i=0; i<colhei; ++i)
392 if (colptr[0] == NULL)
397 if ((q = colptr[j]) == NULL)
400 colptr[j] = q->snext;
405 // x external reference
407 // space nothing special
413 else if ((w & (DEFINED|GLOBAL)) == GLOBAL)
418 c1 = tdb_text[w & TDB];
421 strcpy(ln2, "external");
424 sprintf(ln2, "%08X", q->svalue);
428 sprintf(ln1, " %16s %s %c%c%c", q->sname, ln2, (ww & EQUATEDREG) ? 'e' : SPACE, c1, c);