#include #include #include #include #include #include #include #include #include "util.h" char *argv0; static void vwarn(const char *fmt, va_list ap) { fprintf(stderr, "%s: ", argv0); vfprintf(stderr, fmt, ap); if (fmt[0] && fmt[strlen(fmt) - 1] == ':') { fputc(' ', stderr); perror(NULL); } else { fputc('\n', stderr); } } void warn(const char *fmt, ...) { va_list ap; va_start(ap, fmt); vwarn(fmt, ap); va_end(ap); } void fatal(const char *fmt, ...) { va_list ap; va_start(ap, fmt); vwarn(fmt, ap); va_end(ap); exit(1); } void * reallocarray(void *buf, size_t n, size_t m) { if (n > 0 && SIZE_MAX / n < m) { errno = ENOMEM; return NULL; } return realloc(buf, n * m); } void * xreallocarray(void *buf, size_t n, size_t m) { buf = reallocarray(buf, n, m); if (!buf && n && m) fatal("reallocarray:"); return buf; } void * xmalloc(size_t len) { void *buf; buf = malloc(len); if (!buf && len) fatal("malloc:"); return buf; } char * progname(char *name, char *fallback) { char *slash; if (!name) return fallback; slash = strrchr(name, '/'); return slash ? slash + 1 : name; } void * arrayadd(struct array *a, size_t n) { void *v; if (a->cap - a->len < n) { do a->cap = a->cap ? a->cap * 2 : 256; while (a->cap - a->len < n); a->val = realloc(a->val, a->cap); if (!a->val) fatal("realloc"); } v = (char *)a->val + a->len; a->len += n; return v; } void arrayaddptr(struct array *a, void *v) { *(void **)arrayadd(a, sizeof(v)) = v; } void arrayaddbuf(struct array *a, const void *src, size_t n) { memcpy(arrayadd(a, n), src, n); } void * arraylast(struct array *a, size_t n) { if (a->len == 0) return NULL; assert(n <= a->len); return (char *)a->val + a->len - n; } void listinsert(struct list *list, struct list *new) { new->next = list->next; new->prev = list; list->next->prev = new; list->next = new; } void listremove(struct list *list) { list->next->prev = list->prev; list->prev->next = list->next; list->next = list->prev = NULL; }