symtab.c File Reference

#include "defs.h"

Include dependency graph for symtab.c:

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Macros
#define	TABLE_SIZE   1024

Functions
bucket *	make_bucket (char *name)
bucket *	lookup (char *name)
void	create_symbol_table (void)
void	free_symbol_table (void)
void	free_symbols (void)

Variables
bucket **	symbol_table
bucket *	first_symbol
bucket *	last_symbol

Macro Definition Documentation

#define TABLE_SIZE   1024

Definition at line 15 of file symtab.c.

Function Documentation

void create_symbol_table

(

void

)

Definition at line 88 of file symtab.c.

{
    int i;
    bucket *bp;

    symbol_table = (bucket **) MALLOC(TABLE_SIZE*sizeof(bucket *));
    if (symbol_table == 0) no_space();
    for (i = 0; i < TABLE_SIZE; i++)
        symbol_table[i] = 0;

    bp = make_bucket("error");
    bp->index = 1;
    bp->class = TERM;

    first_symbol = bp;
    last_symbol = bp;
    symbol_table[hash("error")] = bp;
}

void free_symbol_table

(

void

)

Definition at line 109 of file symtab.c.

{
    FREE(symbol_table);
    symbol_table = 0;
}

void free_symbols

(

void

)

Definition at line 117 of file symtab.c.

{
    bucket *p, *q;

    for (p = first_symbol; p; p = q)
    {
        q = p->next;
        FREE(p);
    }
}

bucket* lookup

(

char *

name

)

Definition at line 66 of file symtab.c.

{
    bucket *bp, **bpp;

    bpp = symbol_table + hash(name);
    bp = *bpp;

    while (bp)
    {
        if (strcmp(name, bp->name) == 0) return (bp);
        bpp = &bp->link;
        bp = *bpp;
    }

    *bpp = bp = make_bucket(name);
    last_symbol->next = bp;
    last_symbol = bp;

    return (bp);
}

bucket* make_bucket

(

char *

name

)

Definition at line 40 of file symtab.c.

{
    bucket *bp;

    assert(name);
    bp = (bucket *) MALLOC(sizeof(bucket));
    if (bp == 0) no_space();
    bp->link = 0;
    bp->next = 0;
    bp->name = MALLOC(strlen(name) + 1);
    if (bp->name == 0) no_space();
    bp->tag = 0;
    bp->value = UNDEFINED;
    bp->index = 0;
    bp->prec = 0;
    bp-> class = UNKNOWN;
    bp->assoc = TOKEN;

    if (bp->name == 0) no_space();
    strcpy(bp->name, name);

    return (bp);
}

Variable Documentation

bucket* first_symbol

Definition at line 19 of file symtab.c.

bucket* last_symbol

Definition at line 20 of file symtab.c.

bucket** symbol_table

Definition at line 18 of file symtab.c.