strncmp
Description of the 'strncmp' function in HyperDbg Scripts
Function
strncmp
Syntax
strncmp( Str1, Str2, Num );
Parameters
[Str1]
A MASM-like expression or a string to compare with Str2.
[Str2]
A MASM-like expression or a string to compare with Str1.
[Num]
Maximum number of characters to compare.
Description
Compares up to Num characters of the string Str1 to the string Str2.
If the characters are equal, the comparison continues with the next pair of characters. This process repeats until the characters differ, a terminating null character is encountered, or Num characters have been compared in both strings, whichever occurs first.
Return value
Returns an integer value indicating the relationship between the strings:
| Return Value | Indicates |
|---|---|
<0 | The first character that does not match has a lower value in Str1 than in Str2. |
0 | The contents of both strings are equal. |
>0 | The first character that does not match has a greater value in Str1 than in Str2. |
Examples
strncmp(fffff806`6de00000, @rax+c0, 0n12);
Compare the the first 12 (decimal) characters of the string located at fffff806`6de00000 with the string located at @rax+c0.
strncmp(@rcx, "Test String", b);
Compare the first 0xb (hexadecimal) characters of the string located at @rcx with the string "Test String".
strncmp("Test String1", "Test String2", 0n7);
Compare the first 7 (decimal) characters of the string "Test String1" with the string "Test String2".
Remarks
This function checks for the validity of both the source and the destination address before the comparison.
The support for this function is added from v0.9.
Related
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