- if (b->rbuf == -1) {
- tvec_write(tv, " -- %.0f iterations ", n);
- what = "op"; whats = "ops"; scale = 1000;
- } else {
- n *= TVEC_REG(tv, in, b->rbuf)->v.bytes.sz;
- x = n; normalize(&x, &u, 1024); tvec_write(tv, " -- %.3f %sB ", x, u);
- what = whats = "B"; scale = 1024;
- }
- x = tm->t; normalize(&x, &u, 1000);
- tvec_write(tv, "in %.3f %ss", x, u);
- if (tm->f&BTF_CYOK) {
- x = tm->cy; normalize(&x, &u, 1000);
- tvec_write(tv, " (%.3f %scy)", x, u);
+static int layout_string(struct layout *lyt, const char *p, size_t sz)
+{
+ const char *q, *r, *l = p + sz;
+
+ /* This is rather vexing. There are a small number of jobs to do, but the
+ * logic for deciding which to do when gets rather hairy if, as I've tried
+ * here, one aims to minimize the number of decisions being checked, so
+ * it's worth canning them into macros.
+ *
+ * Here, a `blank' is a whitespace character other than newline. The input
+ * buffer consists of one or more `segments', each of which consists of:
+ *
+ * * an initial portion, which is either empty or ends with a nonblank
+ * character;
+ *
+ * * a suffix which consists only of blanks; and
+ *
+ * * an optional newline.
+ *
+ * All segments except the last end with a newline.
+ */
+
+#define SPLIT_SEGMENT do { \
+ /* Determine the bounds of the current segment. If there is a final \
+ * newline, then q is non-null and points to this newline; otherwise, \
+ * q is null. The initial portion of the segment lies between p .. r \
+ * and the blank suffix lies between r .. q (or r .. l if q is null). \
+ * This sounds awkward, but the suffix is only relevant if there is \
+ * no newline. \
+ */ \
+ \
+ q = memchr(p, '\n', l - p); SPLIT_RANGE(r, p, q ? q : l); \
+} while (0)
+
+#define PUT_NONBLANK do { \
+ /* Output the initial portion of the segment. */ \
+ \
+ PUT_RANGE(p, r); \
+} while (0)
+
+#define PUT_NEWLINE do { \
+ /* Write a newline, and advance to the next segment. */ \
+ \
+ PUT_CHAR('\n'); p = q + 1; \
+} while (0)
+
+#define SAVE_TAIL do { \
+ /* Save the trailing blank portion of the segment in the buffer. \
+ * Assumes that there is no newline, since otherwise the suffix would \
+ * be omitted. \
+ */ \
+ \
+ DPUTM(&lyt->w, r, l - r); \
+} while (0)
+
+ /* Determine the bounds of the first segment. Handling this is the most
+ * complicated part of this function.
+ */
+ SPLIT_SEGMENT;
+
+ if (!q) {
+ /* This is the only segment. We'll handle the whole thing here.
+ *
+ * If there's an initial nonblank portion, then we need to write that
+ * out. Furthermore, if we're at the start of the line then we'll need
+ * to write the prefix, and if there's saved blank material then we'll
+ * need to write that. Otherwise, there's only blank stuff, which we
+ * accumulate in the buffer.
+ *
+ * If we're at the start of a line here, then put the prefix followed by
+ * any saved whitespace, and then our initial nonblank portion. Then
+ * save our new trailing space.
+ */
+
+ if (r > p) {
+ if (lyt->f&LYTF_NEWL) { PUT_PREFIX; lyt->f &= ~LYTF_NEWL; }
+ PUT_SAVED; PUT_NONBLANK; DRESET(&lyt->w);
+ }
+ SAVE_TAIL;
+ return (0);
~mdw / mLib / blobdiff