82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/*
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* Copyright (c) Huawei Technologies Co., Ltd. 2014-2018. All rights reserved.
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* Description: vsscanf_s function
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* Author: lishunda
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* Create: 2014-02-25
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*/
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#define SECUREC_INLINE_INIT_FILE_STREAM_STR 1
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#include "secinput.h"
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#if defined(SECUREC_VXWORKS_PLATFORM) && !SECUREC_IN_KERNEL && \
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(!defined(SECUREC_SYSAPI4VXWORKS) && !defined(SECUREC_CTYPE_MACRO_ADAPT))
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#include <ctype.h>
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#endif
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/*
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* <NAME>
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* vsscanf_s
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*
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*
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* <FUNCTION DESCRIPTION>
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* The vsscanf_s function is equivalent to sscanf_s, with the variable argument list replaced by argList
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* The vsscanf_s function reads data from buffer into the location given by
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* each argument. Every argument must be a pointer to a variable with a type
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* that corresponds to a type specifier in format. The format argument controls
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* the interpretation of the input fields and has the same form and function
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* as the format argument for the scanf function.
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* If copying takes place between strings that overlap, the behavior is undefined.
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*
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* <INPUT PARAMETERS>
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* buffer Stored data
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* format Format control string, see Format Specifications.
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* argList pointer to list of arguments
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*
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* <OUTPUT PARAMETERS>
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* argList the converted value stored in user assigned address
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*
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* <RETURN VALUE>
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* Each of these functions returns the number of fields successfully converted
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* and assigned; the return value does not include fields that were read but
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* not assigned. A return value of 0 indicates that no fields were assigned.
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* return -1 if an error occurs.
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*/
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int vsscanf_s(const char *buffer, const char *format, va_list argList)
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{
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size_t count; /* If initialization causes e838 */
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int retVal;
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SecFileStream fStr;
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/* Validation section */
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if (buffer == NULL || format == NULL) {
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SECUREC_ERROR_INVALID_PARAMTER("vsscanf_s");
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return SECUREC_SCANF_EINVAL;
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}
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count = strlen(buffer);
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if (count == 0 || count > SECUREC_STRING_MAX_LEN) {
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SecClearDestBuf(buffer, format, argList);
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SECUREC_ERROR_INVALID_PARAMTER("vsscanf_s");
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return SECUREC_SCANF_EINVAL;
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}
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#if defined(SECUREC_VXWORKS_PLATFORM) && !SECUREC_IN_KERNEL
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/*
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* On vxworks platform when buffer is white string, will set first %s argument tu zero.like following useage:
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* " \v\f\t\r\n", "%s", str, strSize
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* Do not check all character, just first and last character then consider it is white string
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*/
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if (isspace((int)buffer[0]) && isspace((int)buffer[count - 1])) {
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SecClearDestBuf(buffer, format, argList);
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}
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#endif
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SecInitFileStreamFromString(&fStr, buffer, (int)count);
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retVal = SecInputS(&fStr, format, argList);
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if (retVal < 0) {
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SECUREC_ERROR_INVALID_PARAMTER("vsscanf_s");
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return SECUREC_SCANF_EINVAL;
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}
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return retVal;
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}
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#if SECUREC_IN_KERNEL
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EXPORT_SYMBOL(vsscanf_s);
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#endif
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