#include "cdecl.h"
#include "cdecl-internal.h"
-size_t cdecl__advance_(char **buf, size_t *n, size_t amount)
-{
- if (amount >= *n) {
- *n = 0;
- *buf = 0;
- } else {
- *buf += amount;
- *n -= amount;
- }
+#include "specstr.h"
- return amount;
-}
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
-size_t cdecl__advance(char **buf, size_t *n, size_t amount)
+size_t cdecl__advance(struct output_state *dst, size_t amount)
{
- size_t ret, rc;
+ size_t x = MIN(amount, dst->dstlen);
- if (!amount)
- return 0;
+ dst->dst += x;
+ dst->dstlen -= x;
+ dst->accum += amount;
- ret = cdecl__advance_(buf, n, amount);
- rc = snprintf(*buf, *n, " ");
- return ret + cdecl__advance_(buf, n, rc);
+ return amount;
}
-size_t cdecl__emit(char **dst, size_t *dstlen, const char *src)
+size_t cdecl__emit(struct output_state *dst, const char *src)
{
- size_t rc = snprintf(*dst, *dstlen, "%s", src);
- return cdecl__advance_(dst, dstlen, rc);
+ size_t rc = snprintf(dst->dst, dst->dstlen, "%s", src);
+ return cdecl__advance(dst, rc);
}
-#include "specstr.h"
-
-static size_t explain_spec(char *buf, size_t n, struct cdecl_declspec *s)
+static void explain_spec(struct output_state *dst, struct cdecl_declspec *s)
{
- const char *keyword = spec_string(s->type);
+ size_t rc;
- if (keyword[0] && s->ident)
- return snprintf(buf, n, "%s %s", keyword, s->ident);
- else if (s->ident)
- return snprintf(buf, n, "%s", s->ident);
- return snprintf(buf, n, "%s", keyword);
+ rc = cdecl__emit(dst, spec_string(s->type));
+ if (s->ident) {
+ cdecl__emit(dst, " " + !rc);
+ cdecl__emit(dst, s->ident);
+ }
}
/*
* listed in mask, which is the bitwise OR of the desired specifier kinds, are
* printed.
*/
-size_t cdecl__explain_specs(char *buf, size_t n, struct cdecl_declspec *s,
- unsigned mask)
+const char *cdecl__emit_specs(struct output_state *dst,
+ struct cdecl_declspec *s,
+ unsigned mask)
{
- size_t ret = 0, rc = 0;
+ const char *sep = " ";
+ int empty = 1;
for (; s; s = s->next) {
if (!(s->type & mask))
continue;
- ret += cdecl__advance(&buf, &n, rc);
- rc = explain_spec(buf, n, s);
+ cdecl__emit(dst, sep + empty);
+ explain_spec(dst, s);
+ empty = 0;
}
- return ret + rc;
+ return sep + empty;
}