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FFI: Don't use libc for C types like char and float

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This insures the correct C standards are followed, but doesn't work on
wasm32-unknown-unknown targets, because there *is* no libc. Given that
the definition of `char` and `float` are very universal anyway, it makes
sense to just use `i8` and `f32`.
This commit is contained in:
mcb2003 2021-03-06 11:30:42 +00:00
parent 0644f03f34
commit b972f44bc9
2 changed files with 18 additions and 19 deletions
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2
Cargo.toml
View File

@ -13,7 +13,7 @@ crate-type = ["lib", "cdylib", "staticlib"]
[features] [features]
use_tolk = ["tolk"] use_tolk = ["tolk"]
ffi = ["libc"] ffi = []
[dependencies] [dependencies]
dyn-clonable = "0.9" dyn-clonable = "0.9"

35
src/ffi.rs
View File

@ -1,6 +1,5 @@
//! Bindings to this library to allow it to be called from C/C++. //! Bindings to this library to allow it to be called from C/C++.
use libc::{c_char, c_float};
use std::{ use std::{
cell::RefCell, cell::RefCell,
ffi::{CStr, CString, NulError}, ffi::{CStr, CString, NulError},
@ -25,7 +24,7 @@ fn set_last_error<E: Into<Vec<u8>>>(err: E) -> Result<(), NulError> {
/// This string will be valid until at least the next call to `tts_get_error`. /// This string will be valid until at least the next call to `tts_get_error`.
/// It is never called internally by the library. /// It is never called internally by the library.
#[no_mangle] #[no_mangle]
pub extern "C" fn tts_get_error() -> *const c_char { pub extern "C" fn tts_get_error() -> *const i8 {
LAST_ERROR.with(|err| match &*err.borrow() { LAST_ERROR.with(|err| match &*err.borrow() {
Some(e) => e.as_ptr(), Some(e) => e.as_ptr(),
None => ptr::null(), None => ptr::null(),
@ -92,7 +91,7 @@ pub unsafe extern "C" fn tts_supported_features(tts: *const TTS) -> Features {
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_speak( pub unsafe extern "C" fn tts_speak(
tts: *mut TTS, tts: *mut TTS,
text: *const c_char, text: *const i8,
interrupt: bool, interrupt: bool,
utterance: *mut *mut UtteranceId, utterance: *mut *mut UtteranceId,
) -> bool { ) -> bool {
@ -146,21 +145,21 @@ pub unsafe extern "C" fn tts_stop(tts: *mut TTS) -> bool {
/// Returns the minimum rate for this speech synthesizer. /// Returns the minimum rate for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_min_rate(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_min_rate(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().min_rate() tts.as_ref().unwrap().min_rate()
} }
/// Returns the maximum rate for this speech synthesizer. /// Returns the maximum rate for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_max_rate(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_max_rate(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().max_rate() tts.as_ref().unwrap().max_rate()
} }
/// Returns the normal rate for this speech synthesizer. /// Returns the normal rate for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_normal_rate(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_normal_rate(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().normal_rate() tts.as_ref().unwrap().normal_rate()
} }
@ -169,7 +168,7 @@ pub unsafe extern "C" fn tts_normal_rate(tts: *const TTS) -> c_float {
/// or if `tts` is NULL. /// or if `tts` is NULL.
/// Does nothing if `rate` is NULL. /// Does nothing if `rate` is NULL.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_get_rate(tts: *const TTS, rate: *mut c_float) -> bool { pub unsafe extern "C" fn tts_get_rate(tts: *const TTS, rate: *mut f32) -> bool {
if tts.is_null() { if tts.is_null() {
return false; return false;
} }
@ -191,7 +190,7 @@ pub unsafe extern "C" fn tts_get_rate(tts: *const TTS, rate: *mut c_float) -> bo
/// Returns true on success, false on error (likely that the backend doesn't support rate changes) /// Returns true on success, false on error (likely that the backend doesn't support rate changes)
/// or if `tts` is NULL. /// or if `tts` is NULL.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_set_rate(tts: *mut TTS, rate: c_float) -> bool { pub unsafe extern "C" fn tts_set_rate(tts: *mut TTS, rate: f32) -> bool {
if tts.is_null() { if tts.is_null() {
return false; return false;
} }
@ -207,21 +206,21 @@ pub unsafe extern "C" fn tts_set_rate(tts: *mut TTS, rate: c_float) -> bool {
/// Returns the minimum pitch for this speech synthesizer. /// Returns the minimum pitch for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_min_pitch(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_min_pitch(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().min_pitch() tts.as_ref().unwrap().min_pitch()
} }
/// Returns the maximum pitch for this speech synthesizer. /// Returns the maximum pitch for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_max_pitch(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_max_pitch(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().max_pitch() tts.as_ref().unwrap().max_pitch()
} }
/// Returns the normal pitch for this speech synthesizer. /// Returns the normal pitch for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_normal_pitch(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_normal_pitch(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().normal_pitch() tts.as_ref().unwrap().normal_pitch()
} }
@ -230,7 +229,7 @@ pub unsafe extern "C" fn tts_normal_pitch(tts: *const TTS) -> c_float {
/// or if `tts` is NULL. /// or if `tts` is NULL.
/// Does nothing if `pitch` is NULL. /// Does nothing if `pitch` is NULL.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_get_pitch(tts: *const TTS, pitch: *mut c_float) -> bool { pub unsafe extern "C" fn tts_get_pitch(tts: *const TTS, pitch: *mut f32) -> bool {
if tts.is_null() { if tts.is_null() {
return false; return false;
} }
@ -252,7 +251,7 @@ pub unsafe extern "C" fn tts_get_pitch(tts: *const TTS, pitch: *mut c_float) ->
/// Returns true on success, false on error (likely that the backend doesn't support pitch changes) /// Returns true on success, false on error (likely that the backend doesn't support pitch changes)
/// or if `tts` is NULL. /// or if `tts` is NULL.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_set_pitch(tts: *mut TTS, pitch: c_float) -> bool { pub unsafe extern "C" fn tts_set_pitch(tts: *mut TTS, pitch: f32) -> bool {
if tts.is_null() { if tts.is_null() {
return false; return false;
} }
@ -268,21 +267,21 @@ pub unsafe extern "C" fn tts_set_pitch(tts: *mut TTS, pitch: c_float) -> bool {
/// Returns the minimum volume for this speech synthesizer. /// Returns the minimum volume for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_min_volume(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_min_volume(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().min_volume() tts.as_ref().unwrap().min_volume()
} }
/// Returns the maximum volume for this speech synthesizer. /// Returns the maximum volume for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_max_volume(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_max_volume(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().max_volume() tts.as_ref().unwrap().max_volume()
} }
/// Returns the normal volume for this speech synthesizer. /// Returns the normal volume for this speech synthesizer.
/// `tts` must be a valid pointer to a TTS object. /// `tts` must be a valid pointer to a TTS object.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_normal_volume(tts: *const TTS) -> c_float { pub unsafe extern "C" fn tts_normal_volume(tts: *const TTS) -> f32 {
tts.as_ref().unwrap().normal_volume() tts.as_ref().unwrap().normal_volume()
} }
@ -291,7 +290,7 @@ pub unsafe extern "C" fn tts_normal_volume(tts: *const TTS) -> c_float {
/// or if `tts` is NULL. /// or if `tts` is NULL.
/// Does nothing if `volume` is NULL. /// Does nothing if `volume` is NULL.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_get_volume(tts: *const TTS, volume: *mut c_float) -> bool { pub unsafe extern "C" fn tts_get_volume(tts: *const TTS, volume: *mut f32) -> bool {
if tts.is_null() { if tts.is_null() {
return false; return false;
} }
@ -313,7 +312,7 @@ pub unsafe extern "C" fn tts_get_volume(tts: *const TTS, volume: *mut c_float) -
/// Returns true on success, false on error (likely that the backend doesn't support volume changes) /// Returns true on success, false on error (likely that the backend doesn't support volume changes)
/// or if `tts` is NULL. /// or if `tts` is NULL.
#[no_mangle] #[no_mangle]
pub unsafe extern "C" fn tts_set_volume(tts: *mut TTS, volume: c_float) -> bool { pub unsafe extern "C" fn tts_set_volume(tts: *mut TTS, volume: f32) -> bool {
if tts.is_null() { if tts.is_null() {
return false; return false;
} }