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template <class T>
const T* search(
const T* b1,
const T* e1,
const T* b2,
const T* e2
);
template <class T>
const T* search_r(
int (*rel)(const T*,const T*),
const T* b1,
const T* e1,
const T* b2,
const T* e2
);
(C) For the plain version, T::operator== defines an equivalence relation on T.
(2) For the relational version, rel defines an equivalence relation on T.
These functions return a location in the first array at which begins a subarray of the same size as the second array such that every element in this subarray is equal to the corresponding element of the second array. If such a location does not exist, they return 0.
template <class T>
const T* search(
const T* b1,
const T* e1,
const T* b2,
const T* e2
);
Uses T::operator== to define equality.
template <class T>
const T* search_r(
int (*rel)(const T*,const T*),
const T* b1,
const T* e1,
const T* b2,
const T* e2
);
Uses rel to define equality. That is, if p and q are pointers into the first and second array, respectively, then p and q begin matching subarray of length 1 if rel(p,q)==0.
If N and M are the sizes of first and second arrays, respectively, then complexity is O(N*M). At most N*M equality tests are done. However, it is quite fast on the average in most practical cases.
Because a Block (see Block(3C++)) can always be used wherever an array is called for, Array Algorithms can also be used with Blocks. In fact, these two components were actually designed to be used together.