diff options
Diffstat (limited to 'src/common/grfio.c')
| -rw-r--r-- | src/common/grfio.c | 24 |
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"); |