| /* %%%%%%%%%%%%%%%%%%%% (c) William Landi 1991 %%%%%%%%%%%%%%%%%%%%%%%%%%%% */ |
| /* Permission to use this code is granted as long as the copyright */ |
| /* notice remains in place. */ |
| /* ========================= sym_tab.h ===================================== */ |
| #include "constants.h" |
| |
| /* kind What kind/type of symbol is it. */ |
| enum kind {RELATIVE,ABSOLUTE,EXTERN_REF,MODULE,GLOBAL,UNDEFINED}; |
| |
| /* SYMBOL_TABLE_ENTRY type of a symbol table entry. Part of a linked list*/ |
| typedef struct SYMBOL_TABLE_ENTRY { |
| char LABEL[LABEL_SIZE_1+1]; /* Name of the symbol. */ |
| char MODULE[LABEL_SIZE_1+1]; /* [Program] Module the symbol was found */ |
| /* int. */ |
| int LOCATION; /* Location in SICs memory this label */ |
| /* represents. For module names it */ |
| /* is the starting address. For */ |
| /* constants it is the value. */ |
| int LENGTH; /* Only for module names, the length of */ |
| /* the module. */ |
| enum kind TYPE; /* kind/type of label (relative, ...) */ |
| struct SYMBOL_TABLE_ENTRY *NEXT; /* Pointer to next entry in the list */ |
| } *SYMBOL_TABLE; |
| |
| /* -------------------------------- INIT_SYM_TAB --------------------------- */ |
| /* 1 parameter: */ |
| /* 1) SYMBOL_TABLE *TABLE; */ |
| /* Initialize the symbol table TABLE. */ |
| extern void INIT_SYM_TAB(); |
| |
| /* ------------------------- LOOK_UP_SYMBOL -------------------------------- */ |
| /* 3 parameters: */ |
| /* 1) char MODULE[]; /* Name of module label found it. */ |
| /* 2) char LABEL[]; /* Label to look for. */ |
| /* 3) SYMBOL_TABLE *TABLE; /* Table to look in. */ |
| /* find a symbol in the table. Return a pointer to its entry in the table, if*/ |
| /* found, otherwise return NULL. */ |
| extern struct SYMBOL_TABLE_ENTRY *LOOK_UP_SYMBOL(); |
| |
| /* -------------------------- INSERT_IN_SYM_TAB ---------------------------- */ |
| /* 5 parameters: */ |
| /* 1) char *LABEL; Label to add. */ |
| /* 2) char *MODULE; Module that this label was found in. */ |
| /* 3) int LOCATION; What the entries LOCATION field */ |
| /* should be set to. */ |
| /* 4) enum kind TYPE; What the entries TYPE field should be */ |
| /* set to. */ |
| /* 5) SYMBOL_TABLE *TABLE; Table to add <MODULE,LABEL> to. */ |
| /* If <MODULE,LABEL> pair is not in the symbol table, put it there and */ |
| /* TRUE (integer 1). Otherwise return FALSE (integer 0). */ |
| /* Puts onto front of the linked list. */ |
| extern int INSERT_IN_SYM_TAB(); |
| |
| |
