GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/lotus/securec/vswscanf_s.c

@@ -0,0 +1,69 @@
+/*
+ * 
+ */
+
+#ifndef SECUREC_FOR_WCHAR
+#define SECUREC_FOR_WCHAR
+#endif
+
+#include "secinput.h"
+
+SECUREC_INLINE size_t SecWcslen(const wchar_t *s)
+{
+    const wchar_t *end = s;
+    while (*end != L'\0') {
+        ++end;
+    }
+    return ((size_t)((end - s)));
+}
+
+/*
+ * <FUNCTION DESCRIPTION>
+ *    The  vswscanf_s  function  is  the  wide-character  equivalent  of the vsscanf_s function
+ *    The vsscanf_s function reads data from buffer into the location given by
+ *    each argument. Every argument must be a pointer to a variable with a type
+ *    that corresponds to a type specifier in format.
+ *    The format argument controls the interpretation of the input fields and
+ *    has the same form and function as the format argument for the scanf function.
+ *    If copying takes place between strings that overlap, the behavior is undefined.
+ *
+ * <INPUT PARAMETERS>
+ *    buffer                Stored data
+ *    format                Format control string, see Format Specifications.
+ *    argList               pointer to list of arguments
+ *
+ * <OUTPUT PARAMETERS>
+ *    argList               the converted value stored in user assigned address
+ *
+ * <RETURN VALUE>
+ *    Each of these functions returns the number of fields successfully converted
+ *    and assigned; the return value does not include fields that were read but
+ *    not assigned. A return value of 0 indicates that no fields were assigned.
+ *    return -1 if an error occurs.
+ */
+int vswscanf_s(const wchar_t *buffer, const wchar_t *format, va_list argList)
+{
+    size_t count; /* If initialization causes  e838 */
+    SecFileStream fStr;
+    int retVal;
+
+    /* Validation section */
+    if (buffer == NULL || format == NULL) {
+        SECUREC_ERROR_INVALID_PARAMTER("vswscanf_s");
+        return SECUREC_SCANF_EINVAL;
+    }
+    count = SecWcslen(buffer);
+    if (count == 0 || count > SECUREC_WCHAR_STRING_MAX_LEN) {
+        SecClearDestBufW(buffer, format, argList);
+        SECUREC_ERROR_INVALID_PARAMTER("vswscanf_s");
+        return SECUREC_SCANF_EINVAL;
+    }
+    SECUREC_FILE_STREAM_FROM_STRING(&fStr, (const char *)buffer, count * sizeof(wchar_t));
+    retVal = SecInputSW(&fStr, format, argList);
+    if (retVal < 0) {
+        SECUREC_ERROR_INVALID_PARAMTER("vswscanf_s");
+        return SECUREC_SCANF_EINVAL;
+    }
+    return retVal;
+}
+