67 lines
1.1 KiB
C
67 lines
1.1 KiB
C
/*
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* $Id: etc.c,v 1.7 1994/06/10 15:16:04 pk Exp $
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*/
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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/*
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* Like malloc but get fatal error if memory is exhausted.
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*/
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void *
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xmalloc(size)
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size_t size;
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{
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register void *result = (void *)malloc(size);
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if (!result)
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errx(1, "virtual memory exhausted");
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return result;
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}
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/*
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* Like realloc but get fatal error if memory is exhausted.
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*/
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void *
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xrealloc(ptr, size)
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void *ptr;
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size_t size;
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{
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register void *result;
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if (ptr == NULL)
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result = (void *)malloc(size);
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else
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result = (void *)realloc(ptr, size);
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if (!result)
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errx(1, "virtual memory exhausted");
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return result;
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}
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/*
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* Return a newly-allocated string whose contents concatenate
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* the strings S1, S2, S3.
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*/
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char *
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concat(s1, s2, s3)
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const char *s1, *s2, *s3;
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{
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register int len1 = strlen(s1),
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len2 = strlen(s2),
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len3 = strlen(s3);
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register char *result = (char *)xmalloc(len1 + len2 + len3 + 1);
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strcpy(result, s1);
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strcpy(result + len1, s2);
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strcpy(result + len1 + len2, s3);
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result[len1 + len2 + len3] = 0;
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return result;
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}
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