return p;
}
+void *
+xzalloc(size_t size)
+{
+ return xcalloc(1, size);
+}
+
void *
xmalloc(size_t size)
{
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
- if (err_no != 0)
- fprintf(stderr, " (%s)", strerror(err_no));
+ if (err_no != 0) {
+ fprintf(stderr, " (%s)",
+ err_no == EOF ? "end of file" : strerror(err_no));
+ }
putc('\n', stderr);
errno = save_errno;
{
return str_to_llong(s, base, (long long *) ull);
}
+
+/* Converts floating-point string 's' into a double. If successful, stores
+ * the double in '*d' and returns true; on failure, stores 0 in '*d' and
+ * returns false.
+ *
+ * Underflow (e.g. "1e-9999") is not considered an error, but overflow
+ * (e.g. "1e9999)" is. */
+bool
+str_to_double(const char *s, double *d)
+{
+ int save_errno = errno;
+ char *tail;
+ errno = 0;
+ *d = strtod(s, &tail);
+ if (errno == EINVAL || (errno == ERANGE && *d != 0)
+ || tail == s || *tail != '\0') {
+ errno = save_errno;
+ *d = 0;
+ return false;
+ } else {
+ errno = save_errno;
+ return true;
+ }
+}
+
+/* Returns the value of 'c' as a hexadecimal digit. */
+int
+hexit_value(int c)
+{
+ switch (c) {
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ return c - '0';
+
+ case 'a': case 'A':
+ return 0xa;
+
+ case 'b': case 'B':
+ return 0xb;
+
+ case 'c': case 'C':
+ return 0xc;
+
+ case 'd': case 'D':
+ return 0xd;
+
+ case 'e': case 'E':
+ return 0xe;
+
+ case 'f': case 'F':
+ return 0xf;
+ }
+
+ NOT_REACHED();
+}
+
+/* Returns the directory name portion of 'file_name' as a malloc()'d string,
+ * similar to the POSIX dirname() function but thread-safe. */
+char *
+dir_name(const char *file_name)
+{
+ size_t len = strlen(file_name);
+ while (len > 0 && file_name[len - 1] == '/') {
+ len--;
+ }
+ while (len > 0 && file_name[len - 1] != '/') {
+ len--;
+ }
+ while (len > 0 && file_name[len - 1] == '/') {
+ len--;
+ }
+ if (!len) {
+ return xstrdup((file_name[0] == '/'
+ && file_name[1] == '/'
+ && file_name[2] != '/') ? "//"
+ : file_name[0] == '/' ? "/"
+ : ".");
+ } else {
+ return xmemdup0(file_name, len);
+ }
+}
+
+/* Pass a value to this function if it is marked with
+ * __attribute__((warn_unused_result)) and you genuinely want to ignore
+ * its return value. (Note that every scalar type can be implicitly
+ * converted to bool.) */
+void ignore(bool x UNUSED) { }