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Add vector_resize

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Nikita Ivanov 2022-06-07 00:17:38 +05:00
parent 55cb74435b
commit 0ae355868d
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GPG Key ID: 6E656AC5B97B5133
2 changed files with 36 additions and 16 deletions
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33
vector.c
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@ -37,25 +37,31 @@ void vector_free(Vector *vec)
free(vec);
}
void vector_append_arr(Vector *vec, void *arr, size_t len)
static void resize_if_needed(Vector *vec, size_t new_len)
{
void *p;
size_t cap = vec->cap;
while (cap < vec->len + len)
while (new_len > cap)
cap *= 2;
if (cap != vec->cap) {
if (!(p = realloc(vec->buf, vec->size * cap))) {
vector_free(vec);
PRINTINTERR(FUNCFAILED("realloc"), ERRNOS);
abort();
}
if (cap == vec->cap)
return;
vec->buf = p;
vec->cap = cap;
if (!(p = realloc(vec->buf, vec->size * cap))) {
vector_free(vec);
PRINTINTERR(FUNCFAILED("realloc"), ERRNOS);
abort();
}
vec->buf = p;
vec->cap = cap;
}
void vector_append_arr(Vector *vec, void *arr, size_t len)
{
resize_if_needed(vec, vec->len + len);
memcpy(vec->buf + vec->len * vec->size, arr, len * vec->size);
vec->len += len;
}
@ -69,3 +75,10 @@ void *vector_get(Vector *vec, size_t i)
{
return vec->buf + i * vec->size;
}
void vector_resize(Vector *vec, size_t len)
{
resize_if_needed(vec, len);
vec->len = len;
}

19
vector.h
View File

@ -14,13 +14,14 @@
#define VECTOR_SIGN_V(name, type, func, ret, ...) \
VECTOR_SIGN(name, type, func, ret, \
Vector##name *v __VA_OPT__(, ) __VA_ARGS__)
Vector##name *vec __VA_OPT__(, ) __VA_ARGS__)
#define VECTOR_SIGN_NEW(name, type) VECTOR_SIGN(name, type, new, Vector##name *, size_t cap)
#define VECTOR_SIGN_FREE(name, type) VECTOR_SIGN_V(name, type, free, void)
#define VECTOR_SIGN_APPEND_ARR(name, type) VECTOR_SIGN_V(name, type, append_arr, void, type *arr, size_t len)
#define VECTOR_SIGN_APPEND(name, type) VECTOR_SIGN_V(name, type, append, void, type val)
#define VECTOR_SIGN_GET(name, type) VECTOR_SIGN_V(name, type, get, type *, size_t i)
#define VECTOR_SIGN_RESIZE(name, type) VECTOR_SIGN_V(name, type, resize, void, size_t len)
#define VECTOR_GEN_SOURCE_(name, type, spec) \
inline spec VECTOR_SIGN_NEW(name, type) \
@ -29,19 +30,23 @@
} \
inline spec VECTOR_SIGN_FREE(name, type) \
{ \
vector_free((Vector *)v); \
vector_free((Vector *)vec); \
} \
inline spec VECTOR_SIGN_APPEND_ARR(name, type) \
{ \
vector_append_arr((Vector *)v, arr, len); \
vector_append_arr((Vector *)vec, arr, len); \
} \
inline spec VECTOR_SIGN_APPEND(name, type) \
{ \
vector_append((Vector *)v, &val); \
vector_append((Vector *)vec, &val); \
} \
inline spec VECTOR_SIGN_GET(name, type) \
{ \
return (type *)vector_get((Vector *)v, i); \
return (type *)vector_get((Vector *)vec, i); \
} \
inline spec VECTOR_SIGN_RESIZE(name, type) \
{ \
vector_resize((Vector *)vec, len); \
}
#define VECTOR_GEN_SOURCE(name, type) VECTOR_GEN_SOURCE_(name, type, )
@ -55,7 +60,8 @@
VECTOR_SIGN_FREE(name, type); \
VECTOR_SIGN_APPEND_ARR(name, type); \
VECTOR_SIGN_APPEND(name, type); \
VECTOR_SIGN_GET(name, type);
VECTOR_SIGN_GET(name, type); \
VECTOR_SIGN_RESIZE(name, type);
VECTOR_TYPE(, void);
@ -64,6 +70,7 @@ void vector_free(Vector *vec);
void vector_append_arr(Vector *vec, void *arr, size_t len);
void vector_append(Vector *vec, void *arr);
void *vector_get(Vector *vec, size_t i);
void vector_resize(Vector *vec, size_t len);
VECTOR_GEN_HEADER(Char, char)