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

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

@@ -0,0 +1,102 @@
+/*
+ * 
+ */
+
+#include "securecutil.h"
+
+SECUREC_INLINE int SecIsInDelimitW(wchar_t ch, const wchar_t *strDelimit)
+{
+    const wchar_t *ctl = strDelimit;
+    while (*ctl != L'\0' && *ctl != ch) {
+        ++ctl;
+    }
+    return (int)(*ctl != L'\0');
+}
+
+/*
+ * Find beginning of token (skip over leading delimiters).
+ * Note that there is no token if this loop sets string to point to the terminal null.
+ */
+SECUREC_INLINE wchar_t *SecFindBeginW(wchar_t *strToken, const wchar_t *strDelimit)
+{
+    wchar_t *token = strToken;
+    while (*token != L'\0') {
+        if (SecIsInDelimitW(*token, strDelimit) != 0) {
+            ++token;
+            continue;
+        }
+        /* Don't find any delimiter in string header, break the loop */
+        break;
+    }
+    return token;
+}
+
+/*
+ * Find the end of the token. If it is not the end of the string, put a null there.
+ */
+SECUREC_INLINE wchar_t *SecFindRestW(wchar_t *strToken, const wchar_t *strDelimit)
+{
+    wchar_t *token = strToken;
+    while (*token != L'\0') {
+        if (SecIsInDelimitW(*token, strDelimit) != 0) {
+            /* Find a delimiter, set string termintor */
+            *token = L'\0';
+            ++token;
+            break;
+        }
+        ++token;
+    }
+    return token;
+}
+
+/*
+ * Update Token wide character  function
+ */
+SECUREC_INLINE wchar_t *SecUpdateTokenW(wchar_t *strToken, const wchar_t *strDelimit, wchar_t **context)
+{
+    /* Point to updated position.  Record string position for next search in the context */
+    *context = SecFindRestW(strToken, strDelimit);
+    /* Determine if a token has been found */
+    if (*context == strToken) {
+        return NULL;
+    }
+    return strToken;
+}
+
+/*
+ * <NAME>
+ *    wcstok_s
+ *
+ *
+ * <FUNCTION DESCRIPTION>
+ *   The  wcstok_s  function  is  the  wide-character  equivalent  of the strtok_s function
+ *
+ * <INPUT PARAMETERS>
+ *    strToken               String containing token or tokens.
+ *    strDelimit             Set of delimiter characters.
+ *    context                Used to store position information between calls to
+ *                               wcstok_s.
+ *
+ * <OUTPUT PARAMETERS>
+ *    context               is updated
+ * <RETURN VALUE>
+ *   The  wcstok_s  function  is  the  wide-character  equivalent  of the strtok_s function
+ */
+wchar_t *wcstok_s(wchar_t *strToken, const wchar_t *strDelimit, wchar_t **context)
+{
+    wchar_t *orgToken = strToken;
+    /* Validation section */
+    if (context == NULL || strDelimit == NULL) {
+        return NULL;
+    }
+    if (orgToken == NULL && *context == NULL) {
+        return NULL;
+    }
+    /* If string==NULL, continue with previous string */
+    if (orgToken == NULL) {
+        orgToken = *context;
+    }
+    orgToken = SecFindBeginW(orgToken, strDelimit);
+    return SecUpdateTokenW(orgToken, strDelimit, context);
+}
+