-static double tvdiff(const struct timeval *tv_lo,
- const struct timeval *tv_hi)
-{
- return ((tv_hi->tv_sec - tv_lo->tv_sec) +
- (tv_hi->tv_usec - tv_lo->tv_usec)/1.0e6);
-}
-
-static void carefully_write(int fd, const void *buf, size_t sz)
-{
- const unsigned char *p = buf;
- ssize_t n;
-
- if (fd < 0) return;
- while (sz) {
- n = write(fd, p, sz);
- if (n < 0) {
- if (errno == EINTR) continue;
- bail_syserr(errno, "failed to write to output file");
- }
- if (!n) bail("unexpected short write to output file");
- p += n; sz -= n;
- }
-}
-
-static void open_file_on_demand(const char *file, FILE **fp_inout,
- const char *what)
-{
- FILE *fp;
-
- if (!*fp_inout) {
- fp = fopen(file, "w");
- if (!fp)
- bail_syserr(errno, "failed to open %s file `%s'", what, file);
- fprintf(fp, "## %s\n\n", what);
- *fp_inout = fp;
- }
-}
-
-static void check_write(FILE *fp, const char *what)
-{
- fflush(fp);
- if (ferror(fp)) bail_syserr(errno, "error writing %s file", what);
-}
-
-static void carefully_fclose(FILE *fp, const char *what)
-{
- if (fp && (ferror(fp) || fclose(fp)))
- bail_syserr(errno, "error writing %s file", what);
-}
-
-#define DEFVEC(vtype, etype) \
- typedef struct { etype *v; size_t n, sz; } vtype
-#define VEC_INIT { 0, 0, 0 }
-#define VEC_FREE(vv) do { \
- free((vv)->v); (vv)->v 0; (vv)->n = (vv)->sz = 0; \
-} while (0)
-#define VEC_PUSH(p, vv) do { \
- size_t _want; \
- if ((vv)->n >= (vv)->sz) { \
- (vv)->sz = (vv)->sz ? 2*(vv)->sz : 32; \
- _want = (vv)->sz*sizeof(*(vv)->v); \
- (vv)->v = realloc((vv)->v, _want); \
- if (!(vv)->v) bail("out of memory allocating %zu bytes", _want); \
- } \
- (p) = &(vv)->v[(vv)->n++]; \
-} while (0)
-