dbba7c9efb
The string copy api rte_strscpy() did not set rte_errno during failures, instead it just returned negative error number. Set rte_errrno if the destination buffer is too small. Signed-off-by: Thomas Monjalon <thomas@monjalon.net> Signed-off-by: Xueming Li <xuemingl@nvidia.com> Reviewed-by: David Marchand <david.marchand@redhat.com>
123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2019 Intel Corporation
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*/
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/**
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* @file
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*
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* String-related functions as replacement for libc equivalents
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*/
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#ifndef _RTE_STRING_FNS_H_
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#define _RTE_STRING_FNS_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <rte_common.h>
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/**
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* Takes string "string" parameter and splits it at character "delim"
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* up to maxtokens-1 times - to give "maxtokens" resulting tokens. Like
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* strtok or strsep functions, this modifies its input string, by replacing
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* instances of "delim" with '\\0'. All resultant tokens are returned in the
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* "tokens" array which must have enough entries to hold "maxtokens".
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*
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* @param string
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* The input string to be split into tokens
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*
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* @param stringlen
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* The max length of the input buffer
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*
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* @param tokens
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* The array to hold the pointers to the tokens in the string
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*
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* @param maxtokens
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* The number of elements in the tokens array. At most, maxtokens-1 splits
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* of the string will be done.
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*
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* @param delim
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* The character on which the split of the data will be done
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*
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* @return
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* The number of tokens in the tokens array.
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*/
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int
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rte_strsplit(char *string, int stringlen,
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char **tokens, int maxtokens, char delim);
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/**
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* @internal
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* DPDK-specific version of strlcpy for systems without
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* libc or libbsd copies of the function
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*/
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static inline size_t
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rte_strlcpy(char *dst, const char *src, size_t size)
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{
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return (size_t)snprintf(dst, size, "%s", src);
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}
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/**
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* @internal
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* DPDK-specific version of strlcat for systems without
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* libc or libbsd copies of the function
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*/
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static inline size_t
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rte_strlcat(char *dst, const char *src, size_t size)
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{
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size_t l = strnlen(dst, size);
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if (l < size)
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return l + rte_strlcpy(&dst[l], src, size - l);
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return l + strlen(src);
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}
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/* pull in a strlcpy function */
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#ifdef RTE_EXEC_ENV_FREEBSD
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#ifndef __BSD_VISIBLE /* non-standard functions are hidden */
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#define strlcpy(dst, src, size) rte_strlcpy(dst, src, size)
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#define strlcat(dst, src, size) rte_strlcat(dst, src, size)
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#endif
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#else /* non-BSD platforms */
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#ifdef RTE_USE_LIBBSD
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#include <bsd/string.h>
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#else /* no BSD header files, create own */
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#define strlcpy(dst, src, size) rte_strlcpy(dst, src, size)
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#define strlcat(dst, src, size) rte_strlcat(dst, src, size)
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#endif /* RTE_USE_LIBBSD */
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#endif /* FREEBSD */
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/**
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* Copy string src to buffer dst of size dsize.
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* At most dsize-1 chars will be copied.
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* Always NUL-terminates, unless (dsize == 0).
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*
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* @param dst
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* The destination string.
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*
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* @param src
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* The input string to be copied.
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*
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* @param dsize
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* Length in bytes of the destination buffer.
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*
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* @return
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* The number of bytes copied (terminating NUL-byte excluded) on success.
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* -E2BIG if the destination buffer is too small.
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* rte_errno is set.
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*/
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ssize_t
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rte_strscpy(char *dst, const char *src, size_t dsize);
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#ifdef __cplusplus
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}
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#endif
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#endif /* RTE_STRING_FNS_H */
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