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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [argz/] [argz_insert.c] - Rev 301
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/* Copyright (C) 2002, 2005 by Red Hat, Incorporated. All rights reserved. * * Permission to use, copy, modify, and distribute this software * is freely granted, provided that this notice is preserved. */ #include <errno.h> #include <sys/types.h> #include <string.h> #include <stdlib.h> #include <argz.h> #define __need_ptrdiff_t #include <stddef.h> error_t _DEFUN (argz_insert, (argz, argz_len, before, entry), char **argz _AND size_t *argz_len _AND char *before _AND const char *entry) { int len = 0; ptrdiff_t delta; if (before == NULL) return argz_add(argz, argz_len, entry); if (before < *argz || before >= *argz + *argz_len) return EINVAL; while (before != *argz && before[-1]) before--; /* delta will always be non-negative, and < *argz_len */ delta = before - *argz; len = strlen(entry) + 1; if(!(*argz = (char *)realloc(*argz, *argz_len + len))) return ENOMEM; memmove(*argz + delta + len, *argz + delta, *argz_len - delta); memcpy(*argz + delta, entry, len); *argz_len += len; return 0; }
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