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-rw-r--r--src/common/grfio.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/src/common/grfio.c b/src/common/grfio.c
index 0a9708f17..fba3dda86 100644
--- a/src/common/grfio.c
+++ b/src/common/grfio.c
@@ -86,11 +86,13 @@ struct grfio_interface *grfio;
// little endian char array to uint conversion
static unsigned int getlong(unsigned char *p)
{
+ nullpo_ret(p);
return (p[0] << 0 | p[1] << 8 | p[2] << 16 | p[3] << 24);
}
static void NibbleSwap(unsigned char *src, int len)
{
+ nullpo_retv(src);
while (len > 0) {
*src = (*src >> 4) | (*src << 4);
++src;
@@ -135,6 +137,7 @@ static void grf_shuffle_enc(struct des_bit64 *src)
{
struct des_bit64 out;
+ nullpo_retv(src);
out.b[0] = src->b[3];
out.b[1] = src->b[4];
out.b[2] = src->b[5];
@@ -152,6 +155,7 @@ static void grf_shuffle_dec(struct des_bit64 *src)
{
struct des_bit64 out;
+ nullpo_retv(src);
out.b[0] = src->b[3];
out.b[1] = src->b[4];
out.b[2] = src->b[6];
@@ -175,6 +179,7 @@ static void grf_decode_header(unsigned char *buf, size_t len)
struct des_bit64 *p = (struct des_bit64 *)buf;
size_t nblocks = len / sizeof(struct des_bit64);
size_t i;
+ nullpo_retv(buf);
// first 20 blocks are all des-encrypted
for (i = 0; i < 20 && i < nblocks; ++i)
@@ -197,6 +202,7 @@ static void grf_decode_full(unsigned char *buf, size_t len, int cycle)
int dcycle, scycle;
size_t i, j;
+ nullpo_retv(buf);
// first 20 blocks are all des-encrypted
for (i = 0; i < 20 && i < nblocks; ++i)
des->decrypt_block(&p[i]);
@@ -314,6 +320,7 @@ static void hashinit(void)
static int grf_filehash(const char *fname)
{
uint32 hash = 0;
+ nullpo_ret(fname);
while (*fname != '\0') {
hash = (hash<<1) + (hash>>7)*9 + TOLOWER(*fname);
fname++;
@@ -396,7 +403,9 @@ static struct grf_filelist *grfio_filelist_add(struct grf_filelist *entry)
*/
static struct grf_filelist *grfio_filelist_modify(struct grf_filelist *entry)
{
- struct grf_filelist *fentry = grfio_filelist_find(entry->fn);
+ struct grf_filelist *fentry;
+ nullpo_retr(NULL, entry);
+ fentry = grfio_filelist_find(entry->fn);
if (fentry != NULL) {
int tmp = fentry->next;
memcpy(fentry, entry, sizeof(struct grf_filelist));
@@ -434,6 +443,7 @@ static void grfio_localpath_create(char *buffer, size_t size, const char *filena
int i;
size_t len;
+ nullpo_retv(buffer);
len = strlen(data_dir);
if (data_dir[0] == '\0' || data_dir[len-1] == '/' || data_dir[len-1] == '\\')
@@ -553,6 +563,7 @@ void *grfio_reads(const char *fname, int *size)
static char *grfio_decode_filename(unsigned char *buf, int len)
{
int i;
+ nullpo_retr(NULL, buf);
for (i = 0; i < len; i += 8) {
NibbleSwap(&buf[i],8);
des->decrypt(&buf[i],8);
@@ -568,7 +579,9 @@ static char *grfio_decode_filename(unsigned char *buf, int len)
*/
static bool grfio_is_full_encrypt(const char *fname)
{
- const char *ext = strrchr(fname, '.');
+ const char *ext;
+ nullpo_retr(false, fname);
+ ext = strrchr(fname, '.');
if (ext != NULL) {
static const char *extensions[] = { ".gnd", ".gat", ".act", ".str" };
int i;
@@ -594,8 +607,10 @@ static int grfio_entryread(const char *grfname, int gentry)
unsigned char grf_header[0x2e] = { 0 };
int entry,entrys,ofs,grf_version;
unsigned char *grf_filelist;
+ FILE *fp;
- FILE *fp = fopen(grfname, "rb");
+ nullpo_retr(1, grfname);
+ fp = fopen(grfname, "rb");
if (fp == NULL) {
ShowWarning("GRF data file not found: '%s'\n", grfname);
return 1; // 1:not found error
@@ -764,6 +779,7 @@ static bool grfio_parse_restable_row(const char *row)
char local[256];
struct grf_filelist *entry = NULL;
+ nullpo_retr(false, row);
if (sscanf(row, "%255[^#\r\n]#%255[^#\r\n]#", w1, w2) != 2)
return false;
@@ -854,6 +870,7 @@ static void grfio_resourcecheck(void)
*/
static int grfio_add(const char *fname)
{
+ nullpo_retr(1, fname);
if (gentry_entrys >= gentry_maxentry) {
#define GENTRY_ADDS 4 // The number increment of gentry_table entries
gentry_maxentry += GENTRY_ADDS;
@@ -899,6 +916,7 @@ void grfio_init(const char *fname)
FILE *data_conf;
int grf_num = 0;
+ nullpo_retv(fname);
hashinit(); // hash table initialization
data_conf = fopen(fname, "r");