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** A local garbage collector ** 

Add the list of malloced addresses alltokens.
Add a function copy_gc to copy and enter the address.
Add a function gc_end to delete all entries in alltokens.
   Beware of addresses deleted elsewhere and use anew by malloc.
Some tokens should not be deleted here, they get another copying.
pre-master-46
Holger Vogt 7 years ago
parent
fb1970e25a
commit
4e6de9626e
1 changed files with 81 additions and 16 deletions
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  1. 97
      src/xspice/mif/mif_inp2.c

97
src/xspice/mif/mif_inp2.c
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@ -87,13 +87,28 @@ static void MIFget_port(
int port_num,
Mif_Status_t *status);
/** A local garbage collector **
The functions copy, MIFgettok, and MIFget_token have been used virtuously,
without caring about memory leaks. This is a test with a local gc.
Add the list of malloced addresses alltokens.
Add a function copy_gc to copy and enter the address.
Add a function MIFgettok_gc like MIFgettok, but entering the address
Add a function MIFget_token_gc like MIFget_token, but entering the address
Add a function gc_end to delete all entries in alltokens.
Beware of addresses deleted elsewhere and use anew by malloc.
Some tokens should not be deleted here, they need another copying.
*/
static char *MIFgettok_gc(char **line);
static char *MIFget_token_gc(char **s, Mif_Token_Type_t *type);
static char *copy_gc(char *in);
static void gc_end(void);
#define MIFgettok MIFgettok_gc
#define MIFget_token MIFget_token_gc
static char *alltokens[BSIZE_SP];
static int curtoknr = 0;
/* ********************************************************************* */
@ -189,7 +204,7 @@ MIF_INP2A (
/* get the name of the instance and add it to the symbol table */
name = MIFgettok(&line);
name = copy(MIFgettok(&line));
INPinsert(&name, tab);
/* locate the last token on the line (i.e. model name) and put it into "model" */
@ -200,6 +215,7 @@ MIF_INP2A (
/* make sure the model name was there. */
if(model == NULL) {
LITERR("Missing model on A type device");
gc_end();
return;
}
@ -208,6 +224,7 @@ MIF_INP2A (
/* and return a pointer to its structure in 'thismodel' */
current->error = MIFgetMod(ckt, model, &thismodel, tab);
if(current->error) {
gc_end();
return;
}
@ -216,6 +233,7 @@ MIF_INP2A (
type = thismodel->INPmodType;
if((type >= DEVmaxnum) || DEVicesfl[type] == 0) {
LITERR("Invalid model type for A type device");
gc_end();
return;
}
@ -258,6 +276,7 @@ MIF_INP2A (
/* Check that the line is not finished yet. */
if(*line == '\0') {
LITERR("Encountered end of line before all connections were found in model.");
gc_end();
return;
}
@ -274,8 +293,6 @@ MIF_INP2A (
Otherwise use default info */
if(next_token_type == MIF_PERCENT_TOK) { /* we found a % */
/* get the port type identifier and check it for validity */
if (next_token)
tfree(next_token);
next_token = MIFget_token(&line, &next_token_type);
/* Note that MIFget_port_type eats the next token and advances the token pointer in line */
MIFget_port_type(ckt,
@ -288,11 +305,13 @@ MIF_INP2A (
&def_port_type_str,
conn_info,
&status);
if(status == MIF_ERROR)
if (status == MIF_ERROR) {
gc_end();
return;
}
} else { /* use the default port type for this connection */
def_port_type = conn_info->default_port_type;
def_port_type_str = copy(conn_info->default_type);
def_port_type_str = copy_gc(conn_info->default_type);
}
/* At this point, next_token should be either a [ char, or should hold
@ -315,6 +334,7 @@ MIF_INP2A (
/* make sure null is allowed */
if(! conn_info->null_allowed) {
LITERR("NULL connection found where not allowed");
gc_end();
return;
}
@ -338,11 +358,13 @@ MIF_INP2A (
if(next_token_type == MIF_LARRAY_TOK) {
LITERR("ERROR - Scalar connection expected, [ found");
printf("ERROR - Scalar connection expected, [ found. Returning . . .");
gc_end();
return;
}
if(next_token_type == MIF_RARRAY_TOK) {
LITERR("ERROR - Unexpected ]");
printf("ERROR - Unexpected ]. Returning . . .");
gc_end();
return;
}
@ -363,8 +385,10 @@ MIF_INP2A (
0, /* port index for scalar connection */
&status);
if(status == MIF_ERROR)
if (status == MIF_ERROR) {
gc_end();
return;
}
fast[0]->conn[i]->size = 1;
@ -401,24 +425,29 @@ MIF_INP2A (
&def_port_type_str,
conn_info,
&status);
if(status == MIF_ERROR)
if (status == MIF_ERROR) {
gc_end();
return;
}
}
/* At this point, next_token should be either a [ or ] char (not allowed),
or hold a non-null connection (netname) */
if(next_token_type == MIF_NULL_TOK) {
LITERR("NULL connection found where not allowed");
printf("NULL connection found where not allowed. Returning . . .");
gc_end();
return;
}
if(next_token_type == MIF_LARRAY_TOK) {
LITERR("ERROR - Unexpected [ - Arrays of arrays not allowed");
printf("ERROR - Unexpected [ - Arrays of arrays not allowed. Returning . . .");
gc_end();
return;
}
if(next_token_type == MIF_RARRAY_TOK) {
LITERR("ERROR - Unexpected ]");
printf("ERROR - Unexpected ]. Returning . . .");
gc_end();
return;
}
/********** mhx Friday, August 19, 2011, 15:08 end ***/
@ -440,8 +469,10 @@ MIF_INP2A (
j, /* port index */
&status);
if(status == MIF_ERROR)
if (status == MIF_ERROR) {
gc_end();
return;
}
} /*------ end of for loop until ] is encountered ------*/
/* At this point, next_token should hold the next token after the
@ -452,12 +483,14 @@ MIF_INP2A (
*/
if(*line == '\0') {
LITERR("Missing ] in array connection");
gc_end();
return;
}
/* record the number of ports found for this connection */
if(j < 1) {
LITERR("Array connection must have at least one port");
gc_end();
return;
}
fast[0]->conn[i]->size = j;
@ -489,6 +522,7 @@ MIF_INP2A (
if(strcmp(next_token, model) != 0) {
LITERR("Too many connections -- expecting model name but encountered other tokens.");
gc_end();
return;
}
@ -501,12 +535,14 @@ MIF_INP2A (
if( (fast[0]->conn[i]->is_null) &&
(! conn_info->null_allowed) ) {
LITERR("Null found for connection where not allowed");
gc_end();
return;
}
if(conn_info->has_lower_bound) {
if(fast[0]->conn[i]->size < conn_info->lower_bound) {
LITERR("Too few ports in connection");
gc_end();
return;
}
}
@ -514,6 +550,7 @@ MIF_INP2A (
if(conn_info->has_upper_bound) {
if(fast[0]->conn[i]->size > conn_info->upper_bound) {
LITERR("Too many ports in connection");
gc_end();
return;
}
}
@ -530,9 +567,11 @@ MIF_INP2A (
if(mdfast->param[i]->is_null) {
if(! param_info->has_default) {
LITERR("Parameter on model has no default");
gc_end();
return;
} else if((param_info->is_array) && (! param_info->has_conn_ref)) {
LITERR("Defaulted array parameter must have associated array connection");
gc_end();
return;
}
}
@ -540,12 +579,13 @@ MIF_INP2A (
if(param_info->has_conn_ref) {
if(fast[0]->conn[param_info->conn_ref]->size != fast[0]->param[i]->size) {
LITERR("Array parameter size on model does not match connection size");
gc_end();
return;
}
}
}
}
gc_end();
}
@ -857,6 +897,8 @@ MIFget_port(
return;
}
*next_token = copy(*next_token);
/* Get the first connection or the voltage source name */
switch(def_port_type) {
@ -972,19 +1014,42 @@ MIFget_port(
#undef MIFgettok
#undef MIFget_token
static char *MIFgettok_gc(char **line)
static
char *MIFgettok_gc(char **line)
{
return MIFgettok(line);
char *newtok = MIFgettok(line);
alltokens[curtoknr++] = newtok;
return newtok;
}
static char *MIFget_token_gc(char **s, Mif_Token_Type_t *type)
static
char *MIFget_token_gc(char **s, Mif_Token_Type_t *type)
{
return MIFget_token(s, type);
char *newtok = MIFget_token(s, type);
alltokens[curtoknr++] = newtok;
return newtok;
}
static
void gc_end(void)
{
int i, j;
for (i = 0; i < BSIZE_SP; i++) {
/* We have multiple entries with the same address */
for (j = i + 1; j < BSIZE_SP; j++)
if (alltokens[i] == alltokens[j])
alltokens[j] = NULL;
tfree(alltokens[i]);
}
}
char *
copy_gc(char* in)
{
char *newtok = copy(in);
alltokens[curtoknr++] = newtok;
return newtok;
}

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