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/*
* malloc.c: safe wrappers around malloc, realloc, free, strdup
*/
#include <stdlib.h>
#include <stdarg.h>
#include "halibut.h"
#ifdef LOGALLOC
#define LOGPARAMS char *file, int line,
static FILE *logallocfp = NULL;
static int logline = 2; /* off by 1: `null pointer is' */
static void loginc(void) { }
static void logallocinit(void) {
if (!logallocfp) {
logallocfp = fopen("malloc.log", "w");
if (!logallocfp) {
fprintf(stderr, "panic: unable to open malloc.log\n");
exit(10);
}
setvbuf (logallocfp, NULL, _IOLBF, BUFSIZ);
fprintf(logallocfp, "null pointer is %p\n", NULL);
}
}
static void logprintf(char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vfprintf(logallocfp, fmt, ap);
va_end(ap);
}
#define LOGPRINT(x) ( logallocinit(), logprintf x )
#define LOGINC do { loginc(); logline++; } while (0)
#else
#define LOGPARAMS
#define LOGPRINT(x)
#define LOGINC ((void)0)
#endif
/*
* smalloc should guarantee to return a useful pointer - Halibut
* can do nothing except die when it's out of memory anyway.
*/
void *(smalloc)(LOGPARAMS int size) {
void *p;
LOGINC;
LOGPRINT(("%s %d malloc(%ld)",
file, line, (long)size));
p = malloc(size);
if (!p)
fatal(err_nomemory);
LOGPRINT((" returns %p\n", p));
return p;
}
/*
* sfree should guaranteeably deal gracefully with freeing NULL
*/
void (sfree)(LOGPARAMS void *p) {
if (p) {
LOGINC;
LOGPRINT(("%s %d free(%p)\n",
file, line, p));
free(p);
}
}
/*
* srealloc should guaranteeably be able to realloc NULL
*/
void *(srealloc)(LOGPARAMS void *p, int size) {
void *q;
if (p) {
LOGINC;
LOGPRINT(("%s %d realloc(%p,%ld)",
file, line, p, (long)size));
q = realloc(p, size);
LOGPRINT((" returns %p\n", q));
} else {
LOGINC;
LOGPRINT(("%s %d malloc(%ld)",
file, line, (long)size));
q = malloc(size);
LOGPRINT((" returns %p\n", q));
}
if (!q)
fatal(err_nomemory);
return q;
}
/*
* dupstr is like strdup, but with the never-return-NULL property
* of smalloc (and also reliably defined in all environments :-)
*/
char *dupstr(char *s) {
char *r = smalloc(1+strlen(s));
strcpy(r,s);
return r;
}
/*
* Duplicate a linked list of words
*/
word *dup_word_list(word *w) {
word *head = NULL, **eptr = &head;
while (w) {
word *newwd = snew(word);
*newwd = *w; /* structure copy */
newwd->text = ustrdup(w->text);
if (w->alt)
newwd->alt = dup_word_list(w->alt);
*eptr = newwd;
newwd->next = NULL;
eptr = &newwd->next;
w = w->next;
}
return head;
}
/*
* Free a linked list of words
*/
void free_word_list(word *w) {
word *t;
while (w) {
t = w;
w = w->next;
sfree(t->text);
if (t->alt)
free_word_list(t->alt);
sfree(t);
}
}
/*
* Free a linked list of paragraphs
*/
void free_para_list(paragraph *p) {
paragraph *t;
while (p) {
t = p;
p = p->next;
sfree(t->keyword);
free_word_list(t->words);
sfree(t);
}
}
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