void p_patchContinue(SemVal *e)
{
e->continuelist = rss_realloc(e->continuelist, /* expand the continuelist */
(e->continuelen + 1) * sizeof(unsigned));
/* room for the jump-backpatch */
e->code = rss_realloc(e->code, e->codelen += sizeof(int16_t));
/* store jumpstart location */
e->continuelist[e->continuelen++] = e->codelen;
}
void sc_changeFile(char *s) /* name of source file to open */
{
register int slen;
if (*s) /* any filename ? */
{
if (!gs_fileSp--) /* no more entries ? */
rss_fatal(0, 0, "more than 10 nested #include directives");
/* save the name and line nr.
of the file */
gs_fileStack[gs_fileSp].fname = rss_strdup(s);
gs_fileStack[gs_fileSp].former_linenr = yylineno;
gs_filenames = rss_realloc(gs_filenames, /* room for new filename */
filenames_len +
(slen = strlen(s)) +
2);
/* append name */
sprintf(gs_filenames + filenames_len, "%s\n", s);
filenames_len += slen + 1; /* new length of string */
yylineno = 0; /* start at new file */
}
util_setSourceName(gs_fileStack[gs_fileSp].fname);
}
void p_pushDead() /* dead_sp: lastused, dead[0] = 0 */
{
if (++gp_dead_sp >= size) /* too few elements ? then 5 more */
gp_dead = rss_realloc(gp_dead, (size += 5) * sizeof(unsigned));
gp_dead[gp_dead_sp] = gp_dead[gp_dead_sp - 1]; /* copy former element */
}
SemVal *p_catCode(SemVal *lval, SemVal *rval)
{
register unsigned l;
register unsigned r;
r = rval->codelen; /* sizeof rval code */
l = lval->codelen; /* sizeof lval code */
lval->code = rss_realloc(lval->code, /* room for new code */
(l + r) * sizeof(int8_t));
/* catenate the code */
memcpy(lval->code + l, rval->code, r * sizeof(int8_t));
lval->codelen += r; /* new size */
patchadd(l, &lval->truelist, &lval->truelen,
rval->truelist, rval->truelen);
patchadd(l, &lval->falselist, &lval->falselen,
rval->falselist, rval->falselen);
patchadd(l, &lval->continuelist, &lval->continuelen,
rval->continuelist, rval->continuelen);
lval->type |= rval->type; /* type of combined code */
/* (is ok with same types) */
p_discard(rval); /* free memory used by SemVal */
return (lval); /* return new frame */
}
SemVal *p_multipleArgs(SemVal *left, SemVal *right)
{
register size_t count;
count = ++left->type; /* get/increase # of args */
/* room for extra SemVal */
left->code = rss_realloc(left->code, count * sizeof(SemVal));
p_expr2stack(right); /* argument is code now */
/* right expression in array */
*codestruc(left, count - 1) = *right;
return (left); /* done */
}
void symtab_setFunParams()
{
FunInfo *info = st_lastFunInfo();
/* set the fun's # params */
info->nParams = gs_vars.nParams = gs_vars.varTab[1].nVars;
/* room for the parameter types */
info->paramType = rss_realloc(NULL, gs_vars.nParams * sizeof(ExprType));
/* assign the parameter types */
for (unsigned idx = 0; idx != gs_vars.nParams; ++idx)
info->paramType[idx] = st_paramType(idx);
}
SemVal *p_insertArg(SemVal *insert, SemVal *mult)
{
register size_t count;
count = ++mult->type; /* get/increase # of args */
/* room for extra SemVal */
mult->code = rss_realloc(mult->code, count * sizeof(SemVal));
memmove( /* shift up for new p_firstArg */
codestruc(mult, 1),
codestruc(mult, 0),
(count - 1) * sizeof(SemVal));
p_expr2stack(insert); /* argument is code now */
*codestruc(mult, 0) = *insert; /* insert expression in array */
return mult; /* done */
}
static void patchadd(register unsigned value, unsigned **dest,
unsigned *dlen, unsigned *source, unsigned slen)
{
register unsigned idx;
if (!*dlen)
*dest = NULL; /* no memory for dest as yet */
for (idx = 0; idx < slen; idx++) /* all elements of source list: */
source[idx] += value; /* icrement addresses of targets */
/* expand the dest area */
*dest = rss_realloc(*dest, (*dlen + slen) * sizeof(unsigned));
/* append source list */
memcpy(*dest + *dlen, source, slen * sizeof(unsigned));
*dlen += slen; /* increment # element */
}