fix(query): fix the invalid access.

include/util/tutil.h

@@ -34,6 +34,8 @@ char   *strtolower(char *dst, const char *src);
 char   *strntolower(char *dst, const char *src, int32_t n);
 char   *strntolower_s(char *dst, const char *src, int32_t n);
 int64_t strnatoi(char *num, int32_t len);
+size_t  tstrncspn(const char *str, size_t ssize, const char *reject, size_t rsize);
+
 char   *strbetween(char *string, char *begin, char *end);
 char   *paGetToken(char *src, char **token, int32_t *tokenLen);
 

source/util/src/tcompare.c

@@ -17,6 +17,7 @@
 #define _XOPEN_SOURCE
 #define _DEFAULT_SOURCE
 #include "tcompare.h"
+#include "tutil.h"
 #include "regex.h"
 #include "tdef.h"
 #include "thash.h"
@@ -1014,16 +1015,12 @@ int32_t patternMatch(const char *pattern, size_t psize, const char *str, size_t
   int32_t j = 0;
   int32_t nMatchChar = 0;
 
-  while ((c = pattern[i++]) != 0 && (i <= psize)) {
+  while ((i < psize) && ((c = pattern[i++]) != 0)) {
     if (c == pInfo->matchAll) { /* Match "*" */
 
-      while ((c = pattern[i++]) == pInfo->matchAll || c == pInfo->matchOne) {
-        if (i > psize) {  // overflow check
-          break;
-        }
-
+      while ((i <  psize) && ((c = pattern[i++]) == pInfo->matchAll || c == pInfo->matchOne)) {
         if (c == pInfo->matchOne) {
-          if (j > ssize || str[j++] == 0) { // empty string, return not match
+          if (j >= ssize || str[j++] == 0) { // empty string, return not match
             return TSDB_PATTERN_NOWILDCARDMATCH;
           } else {
             ++nMatchChar;
@@ -1031,21 +1028,21 @@ int32_t patternMatch(const char *pattern, size_t psize, const char *str, size_t
         }
       }
 
-      if (c == 0 || i > psize) {
+      if (i >= psize && (c == pInfo->umatchOne || c == pInfo->umatchAll)) {
         return TSDB_PATTERN_MATCH; /* "*" at the end of the pattern matches */
       }
 
-      char acceptArray[3] = {toupper(c), tolower(c), 0};
+      char rejectList[2] = {toupper(c), tolower(c)};
 
       str += nMatchChar;
       int32_t remain = ssize - nMatchChar;
       while (1) {
-        size_t n = strcspn(str, acceptArray);
+        size_t n = tstrncspn(str, remain, rejectList, 2);
 
         str += n;
         remain -= n;
 
-        if (str[0] == 0 || (remain <= 0)) {
+        if ((remain <= 0) || str[0] == 0) {
           break;
         }
 
@@ -1075,7 +1072,7 @@ int32_t patternMatch(const char *pattern, size_t psize, const char *str, size_t
     return TSDB_PATTERN_NOMATCH;
   }
 
-  return (str[j] == 0 || j >= ssize) ? TSDB_PATTERN_MATCH : TSDB_PATTERN_NOMATCH;
+  return (j >= ssize || str[j] == 0) ? TSDB_PATTERN_MATCH : TSDB_PATTERN_NOMATCH;
 }
 
 int32_t wcsPatternMatch(const TdUcs4 *pattern, size_t psize, const TdUcs4 *str, size_t ssize, const SPatternCompareInfo *pInfo) {
@@ -1085,14 +1082,10 @@ int32_t wcsPatternMatch(const TdUcs4 *pattern, size_t psize, const TdUcs4 *str,
   int32_t j = 0;
   int32_t nMatchChar = 0;
 
-  while ((c = pattern[i++]) != 0 && (i <= psize)) {
-    /* Match "%" */
-    if (c == pInfo->umatchAll) {
-      while ((c = pattern[i++]) == pInfo->umatchAll || c == pInfo->umatchOne) {
-        if (i > psize) {
-          break;
-        }
+  while ((i < psize) && ((c = pattern[i++]) != 0)) {
+    if (c == pInfo->umatchAll) { /* Match "%" */
 
+      while ((i < psize) && ((c = pattern[i++]) == pInfo->umatchAll || c == pInfo->umatchOne)) {
         if (c == pInfo->umatchOne) {
           if (j >= ssize || str[j++] == 0) {
             return TSDB_PATTERN_NOWILDCARDMATCH;
@@ -1102,7 +1095,7 @@ int32_t wcsPatternMatch(const TdUcs4 *pattern, size_t psize, const TdUcs4 *str,
         }
       }
 
-      if (c == 0 || i > psize) {
+      if (i >= psize && (c == pInfo->umatchOne || c == pInfo->umatchAll)) {
         return TSDB_PATTERN_MATCH;
       }
 
@@ -1116,11 +1109,11 @@ int32_t wcsPatternMatch(const TdUcs4 *pattern, size_t psize, const TdUcs4 *str,
         str += n;
         remain -= n;
 
-        if (str[0] == 0 || (remain <= 0)) {
+        if ((remain <= 0) || str[0] == 0) {
           break;
         }
 
-        int32_t ret = wcsPatternMatch(&pattern[i], psize-i, ++str, --remain, pInfo);
+        int32_t ret = wcsPatternMatch(&pattern[i], psize - i, ++str, --remain, pInfo);
         if (ret != TSDB_PATTERN_NOMATCH) {
           return ret;
         }
@@ -1146,7 +1139,7 @@ int32_t wcsPatternMatch(const TdUcs4 *pattern, size_t psize, const TdUcs4 *str,
     return TSDB_PATTERN_NOMATCH;
   }
 
-  return (str[j] == 0 || j >= ssize) ? TSDB_PATTERN_MATCH : TSDB_PATTERN_NOMATCH;
+  return (j >= ssize || str[j] == 0) ? TSDB_PATTERN_MATCH : TSDB_PATTERN_NOMATCH;
 }
 
 int32_t comparestrRegexNMatch(const void *pLeft, const void *pRight) {
@@ -1198,7 +1191,7 @@ int32_t comparestrRegexMatch(const void *pLeft, const void *pRight) {
 
 int32_t comparewcsRegexMatch(const void* pString, const void* pPattern) {
   size_t len = varDataLen(pPattern);
-  char  *pattern = taosMemoryMalloc(len + 1);
+  char  *pattern = taosMemoryMalloc(len + TSDB_NCHAR_SIZE);
 
   int convertLen = taosUcs4ToMbs((TdUcs4 *)varDataVal(pPattern), len, pattern);
   if (convertLen < 0) {
@@ -1206,7 +1199,7 @@ int32_t comparewcsRegexMatch(const void* pString, const void* pPattern) {
     return TSDB_CODE_APP_ERROR;
   }
 
-  pattern[len] = 0;
+  pattern[convertLen] = 0;
 
   len = varDataLen(pString);
   char *str = taosMemoryMalloc(len + 1);
@@ -1218,7 +1211,7 @@ int32_t comparewcsRegexMatch(const void* pString, const void* pPattern) {
     return TSDB_CODE_APP_ERROR;
   }
 
-  str[len] = 0;
+  str[convertLen] = 0;
 
   int32_t ret = doExecRegexMatch(str, pattern);
 

source/util/src/tutil.c

@@ -376,3 +376,59 @@ void taosIp2String(uint32_t ip, char *str) {
 void taosIpPort2String(uint32_t ip, uint16_t port, char *str) {
   sprintf(str, "%u.%u.%u.%u:%u", ip & 0xFF, (ip >> 8) & 0xFF, (ip >> 16) & 0xFF, (uint8_t)(ip >> 24), port);
 }
+
+size_t tstrncspn(const char *str, size_t size, const char *reject, size_t rsize) {
+  if (rsize == 0 || rsize == 1) {
+    char* p = strnchr(str, reject[0], size, false);
+    return (p == NULL)? size:(p-str);
+  }
+
+  /* Use multiple small memsets to enable inlining on most targets.  */
+  unsigned char  table[256];
+  unsigned char *p = memset(table, 0, 64);
+  memset(p + 64, 0, 64);
+  memset(p + 128, 0, 64);
+  memset(p + 192, 0, 64);
+
+  unsigned char *s = (unsigned char *)reject;
+  int32_t index = 0;
+  do {
+    p[s[index++]] = 1;
+  } while (index < rsize);
+
+  s = (unsigned char*) str;
+  int32_t times = size >> 2;
+  if (times == 0) {
+    for(int32_t i = 0; i < size; ++i) {
+      if (p[s[i]]) {
+        return i;
+      }
+    }
+
+    return size;
+  }
+
+  index = 0;
+  uint32_t c0, c1, c2, c3;
+  for(int32_t i = 0; i < times; ++i, index += 4) {
+    int32_t j = index;
+    c0 = p[s[j]];
+    c1 = p[s[j + 1]];
+    c2 = p[s[j + 2]];
+    c3 = p[s[j + 3]];
+
+    if ((c0 | c1 | c2 | c3) != 0) {
+      size_t count = ((i + 1) >> 2);
+      return (c0 | c1) != 0 ? count - c0 + 1 : count - c2 + 3;
+    }
+  }
+
+  int32_t offset = times * 4;
+  for(int32_t i = offset; i < size; ++i) {
+    if (p[s[i]]) {
+      return i;
+    }
+  }
+
+  return size;
+}

source/util/test/utilTests.cpp

 #include <gtest/gtest.h>
 #include <stdlib.h>
+#include <tutil.h>
 #include <random>
 
 #include "tarray.h"
@@ -232,4 +233,35 @@ TEST(utilTest, char_pattern_match_no_terminated) {
   const char* str10 = "6_6";
   ret = patternMatch(pattern10, 1, str10, strlen(str10), &pInfo);
   ASSERT_EQ(ret, TSDB_PATTERN_MATCH);
+}
+
+TEST(utilTest, tstrncspn) {
+  const char* p1 = "abc";
+  const char* reject = "d";
+  size_t v = tstrncspn(p1, strlen(p1), reject, 1);
+  ASSERT_EQ(v, 3);
+
+  const char* reject1 = "a";
+  v = tstrncspn(p1, strlen(p1), reject1, 1);
+  ASSERT_EQ(v, 0);
+
+  const char* reject2 = "de";
+  v = tstrncspn(p1, strlen(p1), reject2, 2);
+  ASSERT_EQ(v, 3);
+
+  const char* p2 = "abcdefghijklmn";
+  v = tstrncspn(p2, strlen(p2), reject2, 2);
+  ASSERT_EQ(v, 3);
+
+  const char* reject3 = "12345n";
+  v = tstrncspn(p2, strlen(p2), reject3, 6);
+  ASSERT_EQ(v, 13);
+
+  const char* reject4 = "";
+  v = tstrncspn(p2, strlen(p2), reject4, 0);
+  ASSERT_EQ(v, 14);
+
+  const char* reject5 = "911";
+  v = tstrncspn(p2, strlen(p2), reject5, 0);
+  ASSERT_EQ(v, 14);
 }
\ No newline at end of file