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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [argz/] [argz_insert.c] - Blame information for rev 258

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Line No. Rev Author Line
1 207 jeremybenn
/* Copyright (C) 2002, 2005 by  Red Hat, Incorporated. All rights reserved.
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 *
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 * Permission to use, copy, modify, and distribute this software
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 * is freely granted, provided that this notice is preserved.
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 */
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#include <errno.h>
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#include <sys/types.h>
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#include <string.h>
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#include <stdlib.h>
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#include <argz.h>
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#define __need_ptrdiff_t
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#include <stddef.h>
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error_t
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_DEFUN (argz_insert, (argz, argz_len, before, entry),
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       char **argz _AND
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       size_t *argz_len _AND
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       char *before _AND
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       const char *entry)
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{
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  int len = 0;
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  ptrdiff_t delta;
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  if (before == NULL)
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    return argz_add(argz, argz_len, entry);
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  if (before < *argz || before >= *argz + *argz_len)
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    return EINVAL;
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  while (before != *argz && before[-1])
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    before--;
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  /* delta will always be non-negative, and < *argz_len */
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  delta = before - *argz;
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  len = strlen(entry) + 1;
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  if(!(*argz = (char *)realloc(*argz, *argz_len + len)))
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    return ENOMEM;
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  memmove(*argz + delta + len, *argz + delta,  *argz_len - delta);
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  memcpy(*argz + delta, entry, len);
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  *argz_len += len;
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  return 0;
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}

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