odbc_api/handles/
buffer.rs

1use std::{
2    cmp::min,
3    ptr::{null, null_mut},
4};
5
6/// Clamps a usize between `0` and `i16::MAX`.
7pub fn clamp_small_int(n: usize) -> i16 {
8    min(n, i16::MAX as usize) as i16
9}
10
11/// Returns a pointer suitable to be passed as an output buffer to ODBC functions. Most notably it
12/// will return NULL for empty buffers.
13pub fn mut_buf_ptr<T>(buffer: &mut [T]) -> *mut T {
14    if buffer.is_empty() {
15        null_mut()
16    } else {
17        buffer.as_mut_ptr()
18    }
19}
20
21/// Returns a pointer suitable to be passed as an output buffer to ODBC functions. Most notably it
22/// will return NULL for empty buffers.
23pub fn buf_ptr<T>(buffer: &[T]) -> *const T {
24    if buffer.is_empty() {
25        null()
26    } else {
27        buffer.as_ptr()
28    }
29}
odbc_api/handles/buffer.rs

odbc_api/handles/
buffer.rs
