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[c_api] Improve ANSI compatibility by avoiding <stdbool.h> #4697

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merged 6 commits into from
Nov 15, 2021
Merged

[c_api] Improve ANSI compatibility by avoiding <stdbool.h> #4697

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1f45ab4
[c_api] Improve ANSI compatibility by avoiding <stdbool.h>
drewmiller Oct 19, 2021
cce047e
fixes in response to CI linting
drewmiller Oct 19, 2021
8c2c1bb
inline NOLINT instead of separate test
drewmiller Oct 20, 2021
9a1787f
Merge branch 'microsoft:master' into c_api
drewmiller Oct 22, 2021
d624241
moving length declaration to non-ANSI C conditional
drewmiller Oct 22, 2021
fa6e921
[c_api] Align expected return type in `basic.py` with new c_api type.
drewmiller Nov 13, 2021
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11 changes: 8 additions & 3 deletions include/LightGBM/c_api.h
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,6 @@
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#endif


Expand Down Expand Up @@ -434,12 +433,12 @@ LIGHTGBM_C_EXPORT int LGBM_DatasetAddFeaturesFrom(DatasetHandle target,
/* --- start Booster interfaces */

/*!
* \brief Get boolean representing whether booster is fitting linear trees.
* \brief Get int representing whether booster is fitting linear trees.
* \param handle Handle of booster
* \param[out] out The address to hold linear trees indicator
* \return 0 when succeed, -1 when failure happens
*/
LIGHTGBM_C_EXPORT int LGBM_BoosterGetLinear(BoosterHandle handle, bool* out);
LIGHTGBM_C_EXPORT int LGBM_BoosterGetLinear(BoosterHandle handle, int* out);

/*!
* \brief Create a new boosting learner.
Expand Down Expand Up @@ -1361,11 +1360,17 @@ static char* LastErrorMsg() { static THREAD_LOCAL char err_msg[512] = "Everythin
#endif
/*!
* \brief Set string message of the last error.
* \note
* This will call unsafe ``sprintf`` when compiled using C standards before C99.
* \param msg Error message
*/
INLINE_FUNCTION void LGBM_SetLastError(const char* msg) {
#if !defined(__cplusplus) && (!defined(__STDC__) || (__STDC_VERSION__ < 199901L))
sprintf(LastErrorMsg(), "%s", msg); /* NOLINT(runtime/printf) */
#else
const int err_buf_len = 512;
snprintf(LastErrorMsg(), err_buf_len, "%s", msg);
#endif
}

#endif /* LIGHTGBM_C_API_H_ */
8 changes: 6 additions & 2 deletions src/c_api.cpp
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Expand Up @@ -1657,10 +1657,14 @@ int LGBM_BoosterGetNumClasses(BoosterHandle handle, int* out_len) {
API_END();
}

int LGBM_BoosterGetLinear(BoosterHandle handle, bool* out) {
int LGBM_BoosterGetLinear(BoosterHandle handle, int* out) {
API_BEGIN();
Booster* ref_booster = reinterpret_cast<Booster*>(handle);
*out = ref_booster->GetBoosting()->IsLinear();
if (ref_booster->GetBoosting()->IsLinear()) {
*out = 1;
} else {
*out = 0;
}
API_END();
}

Expand Down