[utils] Adding vector_math.h with some inline methods for vector operations (sum, dot product, arithmetic, etc.). Works with kvec dynamic vectors.

src/vector_math.h

@@ -0,0 +1,132 @@
+#ifndef VECTOR_MATH_H
+#define VECTOR_MATH_H
+
+#include <math.h>
+#include "vector.h"
+
+#define VECTOR_INIT_NUMERIC(name, type)                                        \
+    __VECTOR_BASE(name, type)                                                  \
+    __VECTOR_DESTROY(name, type)                                               \
+                                                                               \
+    static inline name *name##_new_value(size_t n, type value) {               \
+        name *vector = name##_new_size(n);                                     \
+        if (vector == NULL) return NULL;                                       \
+        memset(vector->a, (type)value, n * sizeof(type));                      \
+        vector->n = n;                                                         \
+        return vector;                                                         \
+    }                                                                          \
+                                                                               \
+    static inline name *name##_new_ones(size_t n) {                            \
+        return name##_new_value(n, (type)1);                                   \
+    }                                                                          \
+                                                                               \
+    static inline name *name##_new_zeros(size_t n) {                           \
+        return name##_new_value(n, (type)0);                                   \
+    }                                                                          \
+                                                                               \
+    static inline void name##_set(name *vector, type value) {                  \
+        size_t n = vector->n;                                                  \
+        memset(vector->a, (type)value, n * sizeof(type));                      \
+    }                                                                          \
+                                                                               \
+    static inline name *name##_copy(name *vector, size_t n) {                  \
+        name *cpy = name##_new_size(n);                                        \
+        memcpy(vector->a, cpy->a, n * sizeof(type));                           \
+        cpy->n = n;                                                            \
+        return cpy;                                                            \
+    }                                                                          \
+                                                                               \
+    static inline void name##_add(name *vector, type c, size_t n) {            \
+        for (int i = 0; i < n; i++) {                                          \
+            vector->a[i] += c;                                                 \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline void name##_sub(name *vector, type c, size_t n) {            \
+        for (int i = 0; i < n; i++) {                                          \
+            vector->a[i] -= c;                                                 \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline void name##_mul(name *vector, type c, size_t n) {            \
+        for (int i = 0; i < n; i++) {                                          \
+            vector->a[i] *= c;                                                 \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline void name##_div(name *vector, type c, size_t n) {            \
+        for (int i = 0; i < n; i++) {                                          \
+            vector->a[i] /= c;                                                 \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline void name##_log(name *vector, type c, size_t n) {            \
+        for (int i = 0; i < n; i++) {                                          \
+            vector->a[i] += log(vector->a[i]);                                 \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline void name##_exp(name *vector, type c, size_t n) {            \
+        for (int i = 0; i < n; i++) {                                          \
+            vector->a[i] += exp(vector->a[i]);                                 \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline type name##_sum(name *vector, size_t n) {                    \
+        type result = 0;                                                       \
+        for (int i = 0; i < n; i++) {                                          \
+            result += vector->a[i];                                            \
+        }                                                                      \
+        return result;                                                         \
+    }                                                                          \
+                                                                               \
+    static inline type name##_product(name *vector, size_t n) {                \
+        type result = 0;                                                       \
+        for (int i = 0; i < n; i++) {                                          \
+            result *= vector->a[i];                                            \
+        }                                                                      \
+        return result;                                                         \
+    }                                                                          \
+                                                                               \
+    static inline type name##_log_sum(name *vector, size_t n) {                \
+        type result = 0;                                                       \
+        for (int i = 0; i < n; i++) {                                          \
+            result += log(vector->a[i]);                                       \
+        }                                                                      \
+        return result;                                                         \
+    }                                                                          \
+                                                                               \
+    static inline void name##_add_vector(name *v1, name *v2, size_t n) {       \
+        for (int i = 0; i < n; i++) {                                          \
+            v1->a[i] += v2->a[i];                                              \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline void name##_sub_vector(name *v1, name *v2, size_t n) {       \
+        for (int i = 0; i < n; i++) {                                          \
+            v1->a[i] -= v2->a[i];                                              \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline void name##_mul_vector(name *v1, name *v2, size_t n) {       \
+        for (int i = 0; i < n; i++) {                                          \
+            v1->a[i] *= v2->a[i];                                              \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline void name##_div_vector(name *v1, name *v2, size_t n) {       \
+        for (int i = 0; i < n; i++) {                                          \
+            v1->a[i] /= v2->a[i];                                              \
+        }                                                                      \
+    }                                                                          \
+                                                                               \
+    static inline type name##_dot(name *v1, name *v2, size_t n) {              \
+        type result = 0;                                                       \
+        for (int i = 0; i < n; i++) {                                          \
+            result += v1->a[i] * v2->a[i];                                     \
+        }                                                                      \
+        return result;                                                         \
+    }
+
+
+#endif