FFstrbuf: add ffStrbufContainC

Author: CarterLi

src/util/FFstrbuf.h

@@ -189,6 +189,11 @@ static inline FF_C_NODISCARD bool ffStrbufIgnCaseEqual(const FFstrbuf* strbuf, c
     return ffStrbufIgnCaseComp(strbuf, comp) == 0;
 }
 
+static inline FF_C_NODISCARD bool ffStrbufContainC(const FFstrbuf* strbuf, char c)
+{
+    return memchr(strbuf->chars, c, strbuf->length) != NULL;
+}
+
 static inline FF_C_NODISCARD bool ffStrbufContainS(const FFstrbuf* strbuf, const char* str)
 {
     return strstr(strbuf->chars, str) != NULL;

tests/strbuf.c

@@ -204,6 +204,10 @@ int main(void)
     VERIFY(strbuf.allocated == 32);
     VERIFY(ffStrbufEqualS(&strbuf, "1234567890123456789012345678901"));
 
+    //containC
+    VERIFY(ffStrbufContainC(&strbuf, '1'));
+    VERIFY(!ffStrbufContainC(&strbuf, '-'));
+
     ffStrbufDestroy(&strbuf);
 
     //Success