Parasoft检测到错误

Question

我在C中有一个函数，它包含以下几行：

while (src=strstr(src,key)) {
        memmove(src,src+strlen(key),1+strlen(src+strlen(key)));
    }

当我运行parasoft来检查函数时，我从以下几行收到了很多错误：

Not enclosed with brackets assignment was found in 'while' condition expression
LHS operand of '+' operator is 'unsigned long'
LHS operand of '+' operator is 'unsigned long'
LHS operand of '+' operator is 'unsigned long'
RHS operand of '+' operator is 'unsigned long'
RHS operand of '+' operator is 'unsigned long'
RHS operand of '+' operator is 'unsigned long'
Third param to 'memmove' function depends on second: src, key

你知道这些错误来自哪里吗？

Answer 1

第一条消息是因为工具怀疑你的意思是：

while (src == strstr(src, key)) {  /* comparison instead of assignment */

为了明确赋值的目的，一些工具要求您编写

while ((src = strstr(src, key))) {