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- #include <u.h>
- #include <libc.h>
- #include <bio.h>
- #include <draw.h>
- #include <html.h>
- #include "dat.h"
- void*
- emalloc(ulong n)
- {
- void *p;
- p = malloc(n);
- if(p == nil)
- error("can't malloc: %r");
- memset(p, 0, n);
- return p;
- }
- void*
- erealloc(void *p, ulong n)
- {
- p = realloc(p, n);
- if(p == nil)
- error("can't malloc: %r");
- return p;
- }
- char*
- estrdup(char *s)
- {
- char *t;
- t = emalloc(strlen(s)+1);
- strcpy(t, s);
- return t;
- }
- char*
- estrstrdup(char *s, char *t)
- {
- long ns, nt;
- char *u;
- ns = strlen(s);
- nt = strlen(t);
- /* use malloc to avoid memset */
- u = malloc(ns+nt+1);
- if(u == nil)
- error("can't malloc: %r");
- memmove(u, s, ns);
- memmove(u+ns, t, nt);
- u[ns+nt] = '\0';
- return u;
- }
- char*
- eappend(char *s, char *sep, char *t)
- {
- long ns, nsep, nt;
- char *u;
- if(t == nil)
- u = estrstrdup(s, sep);
- else{
- ns = strlen(s);
- nsep = strlen(sep);
- nt = strlen(t);
- /* use malloc to avoid memset */
- u = malloc(ns+nsep+nt+1);
- if(u == nil)
- error("can't malloc: %r");
- memmove(u, s, ns);
- memmove(u+ns, sep, nsep);
- memmove(u+ns+nsep, t, nt);
- u[ns+nsep+nt] = '\0';
- }
- free(s);
- return u;
- }
- char*
- egrow(char *s, char *sep, char *t)
- {
- s = eappend(s, sep, t);
- free(t);
- return s;
- }
- void
- error(char *fmt, ...)
- {
- va_list arg;
- char buf[256];
- Fmt f;
- fmtfdinit(&f, 2, buf, sizeof buf);
- fmtprint(&f, "Mail: ");
- va_start(arg, fmt);
- fmtvprint(&f, fmt, arg);
- va_end(arg);
- fmtprint(&f, "\n");
- fmtfdflush(&f);
- exits(fmt);
- }
- void
- growbytes(Bytes *b, char *s, long ns)
- {
- if(b->nalloc < b->n + ns + 1){
- b->nalloc = b->n + ns + 8000;
- /* use realloc to avoid memset */
- b->b = realloc(b->b, b->nalloc);
- if(b->b == nil)
- error("growbytes: can't realloc: %r");
- }
- memmove(b->b+b->n, s, ns);
- b->n += ns;
- b->b[b->n] = '\0';
- }
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