/* Miscellaneous utilities.
- Copyright (C) 2019 Free Software Foundation, Inc.
+ Copyright (C) 2019-2020 Free Software Foundation, Inc.
This file is part of libctf.
lp->l_prev = p->l_prev;
}
+/* Return 1 if the list is empty. */
+
+int
+ctf_list_empty_p (ctf_list_t *lp)
+{
+ return (lp->l_next == NULL && lp->l_prev == NULL);
+}
+
/* Convert a 32-bit ELF symbol into Elf64 and return a pointer to it. */
Elf64_Sym *
return dst;
}
-/* Convert an encoded CTF string name into a pointer to a C string by looking
- up the appropriate string table buffer and then adding the offset. */
-
-const char *
-ctf_strraw (ctf_file_t *fp, uint32_t name)
-{
- ctf_strs_t *ctsp = &fp->ctf_str[CTF_NAME_STID (name)];
-
- if (ctsp->cts_strs != NULL && CTF_NAME_OFFSET (name) < ctsp->cts_len)
- return (ctsp->cts_strs + CTF_NAME_OFFSET (name));
-
- /* String table not loaded or corrupt offset. */
- return NULL;
-}
-
-const char *
-ctf_strptr (ctf_file_t *fp, uint32_t name)
-{
- const char *s = ctf_strraw (fp, name);
- return (s != NULL ? s : "(?)");
-}
-
-/* Same as strdup(3C), but use ctf_alloc() to do the memory allocation. */
-
-_libctf_malloc_ char *
-ctf_strdup (const char *s1)
-{
- char *s2 = ctf_alloc (strlen (s1) + 1);
-
- if (s2 != NULL)
- (void) strcpy (s2, s1);
-
- return s2;
-}
-
-/* A string appender working on dynamic strings. */
+/* A string appender working on dynamic strings. Returns NULL on OOM. */
char *
ctf_str_append (char *s, const char *append)
return s;
}
+/* A version of ctf_str_append that returns the old string on OOM. */
+
+char *
+ctf_str_append_noerr (char *s, const char *append)
+{
+ char *new_s;
+
+ new_s = ctf_str_append (s, append);
+ if (!new_s)
+ return s;
+ return new_s;
+}
+
+/* A realloc() that fails noisily if called with any ctf_str_num_users. */
+void *
+ctf_realloc (ctf_file_t *fp, void *ptr, size_t size)
+{
+ if (fp->ctf_str_num_refs > 0)
+ {
+ ctf_dprintf ("%p: attempt to realloc() string table with %lu active refs\n",
+ (void *) fp, (unsigned long) fp->ctf_str_num_refs);
+ return NULL;
+ }
+ return realloc (ptr, size);
+}
+
/* Store the specified error code into errp if it is non-NULL, and then
return NULL for the benefit of the caller. */