#include "parse.h"
#include "specstr.h"
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-
size_t cdecl__advance(struct output_state *dst, size_t amount)
{
size_t x = MIN(amount, dst->dstlen);
return amount;
}
-static size_t cdecl__strlcpy(char *dst, const char *src, size_t dstlen)
+size_t cdecl__strlcpy(char *dst, const char *src, size_t dstlen)
{
- if (dst)
- snprintf(dst, dstlen, "%s", src);
- return strlen(src);
+ size_t srclen = strlen(src);
+
+ if (dstlen > 0) {
+ memcpy(dst, src, MIN(dstlen, srclen+1));
+ if (dstlen <= srclen)
+ dst[dstlen-1] = 0;
+ }
+
+ return srclen;
}
size_t cdecl__emit(struct output_state *dst, const char *src)
return cdecl__advance(dst, rc);
}
+/*
+ * 31 decimal digits is enough for values up to 2^102 - 1.
+ * 63 decimal digits is enough for values up to 2^209 - 1.
+ *
+ * We can't portably write numbers this large in preprocessor conditionals,
+ * but since the maximum values of unsigned integer types are always one
+ * less than a power of two, we can use a sequence of small shifts to infer
+ * the bounds.
+ *
+ * All known implementations have 64-bit uintmax_t. Leave some headroom
+ * to support a possible future implementatons with 128-bit uintmax_t.
+ */
+enum {
+#if (UINTMAX_MAX >> 27 >> 27 >> 26 >> 26) == 0
+ MAX_UINT_DIGITS = 31
+#elif (UINTMAX_MAX >> 27 >> 26 >> 26 >> 26 >> 26 >> 26 >> 26 >> 26) == 0
+ MAX_UINT_DIGITS = 63
+#else
+# error UINTMAX_MAX is too large, please report a bug.
+#endif
+};
+
+size_t cdecl__emit_uint(struct output_state *dst, uintmax_t val)
+{
+ char buf[MAX_UINT_DIGITS + 1], *p = &buf[sizeof buf];
+
+ *(--p) = 0;
+ while (val > 0) {
+ *(--p) = '0' + val % 10;
+ val /= 10;
+ }
+
+ return cdecl__emit(dst, p);
+}
+
static void explain_spec(struct output_state *dst, struct cdecl_declspec *s)
{
size_t rc;