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allocate.c
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C/C++ Source or Header
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1991-09-17
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2KB
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98 lines
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <mach/mach.h>
#include "stuff/allocate.h"
#include "stuff/errors.h"
/*
* allocate() is just a wrapper around malloc that prints an error message and
* exits if the malloc fails.
*/
void *
allocate(
unsigned long size)
{
void *p;
if(size == 0)
return(NULL);
if((p = malloc(size)) == NULL)
system_fatal("virtual memory exhausted (malloc failed)");
return(p);
}
/*
* reallocate() is just a wrapper around realloc that prints and error message
* and exits if the realloc fails.
*/
void *
reallocate(
void *p,
unsigned long size)
{
if(p == NULL)
return(allocate(size));
if((p = realloc(p, size)) == NULL)
system_fatal("virtual memory exhausted (realloc failed)");
return(p);
}
/*
* savestr() malloc's space for the string passed to it, copys the string into
* the space and returns a pointer to that space.
*/
char *
savestr(
const char *s)
{
long len;
char *r;
len = strlen(s) + 1;
r = (char *)allocate(len);
strcpy(r, s);
return(r);
}
/*
* Makestr() creates a string that is the concatenation of a variable number of
* strings. It is pass a variable number of pointers to strings and the last
* pointer is NULL. It returns the pointer to the string it created. The
* storage for the string is malloc()'ed can be free()'ed when nolonger needed.
*/
char *
makestr(
const char *args,
...)
{
va_list ap;
char *s, *p;
long size;
size = 0;
if(args != NULL){
size += strlen(args);
va_start(ap, args);
p = (char *)va_arg(ap, char *);
while(p != NULL){
size += strlen(p);
p = (char *)va_arg(ap, char *);
}
}
s = allocate(size + 1);
*s = '\0';
if(args != NULL){
(void)strcat(s, args);
va_start(ap, args);
p = (char *)va_arg(ap, char *);
while(p != NULL){
(void)strcat(s, p);
p = (char *)va_arg(ap, char *);
}
va_end(ap);
}
return(s);
}