# Undocumented ## Functions defined in the headers, but not in the wiki - [SDL_DuplicateSurface](SDL_DuplicateSurface) - [SDL_Error](SDL_Error) - [SDL_HasExactlyOneBitSet32](SDL_HasExactlyOneBitSet32) - [SDL_MemoryBarrierAcquireFunction](SDL_MemoryBarrierAcquireFunction) - [SDL_OnApplicationDidBecomeActive](SDL_OnApplicationDidBecomeActive) - [SDL_OnApplicationDidChangeStatusBarOrientation](SDL_OnApplicationDidChangeStatusBarOrientation) - [SDL_OnApplicationDidEnterBackground](SDL_OnApplicationDidEnterBackground) - [SDL_OnApplicationDidReceiveMemoryWarning](SDL_OnApplicationDidReceiveMemoryWarning) - [SDL_OnApplicationWillEnterForeground](SDL_OnApplicationWillEnterForeground) - [SDL_OnApplicationWillResignActive](SDL_OnApplicationWillResignActive) - [SDL_OnApplicationWillTerminate](SDL_OnApplicationWillTerminate) - [SDL_UnlockSensors](SDL_UnlockSensors) - [SDL_abs](SDL_abs) - [SDL_acosf](SDL_acosf) - [SDL_asin](SDL_asin) - [SDL_asinf](SDL_asinf) - [SDL_asprintf](SDL_asprintf) - [SDL_atan](SDL_atan) - [SDL_atan2](SDL_atan2) - [SDL_atan2f](SDL_atan2f) - [SDL_atanf](SDL_atanf) - [SDL_atof](SDL_atof) - [SDL_atoi](SDL_atoi) - [SDL_bsearch](SDL_bsearch) - [SDL_calloc](SDL_calloc) - [SDL_ceil](SDL_ceil) - [SDL_ceilf](SDL_ceilf) - [SDL_copysign](SDL_copysign) - [SDL_copysignf](SDL_copysignf) - [SDL_cos](SDL_cos) - [SDL_cosf](SDL_cosf) - [SDL_crc16](SDL_crc16) - [SDL_crc32](SDL_crc32) - [SDL_exp](SDL_exp) - [SDL_expf](SDL_expf) - [SDL_fabs](SDL_fabs) - [SDL_fabsf](SDL_fabsf) - [SDL_floor](SDL_floor) - [SDL_floorf](SDL_floorf) - [SDL_fmod](SDL_fmod) - [SDL_fmodf](SDL_fmodf) - [SDL_free](SDL_free) - [SDL_getenv](SDL_getenv) - [SDL_iconv](SDL_iconv) - [SDL_iconv_close](SDL_iconv_close) - [SDL_iconv_open](SDL_iconv_open) - [SDL_isalnum](SDL_isalnum) - [SDL_isalpha](SDL_isalpha) - [SDL_isblank](SDL_isblank) - [SDL_iscntrl](SDL_iscntrl) - [SDL_isdigit](SDL_isdigit) - [SDL_isgraph](SDL_isgraph) - [SDL_islower](SDL_islower) - [SDL_isprint](SDL_isprint) - [SDL_ispunct](SDL_ispunct) - [SDL_isspace](SDL_isspace) - [SDL_isupper](SDL_isupper) - [SDL_isxdigit](SDL_isxdigit) - [SDL_itoa](SDL_itoa) - [SDL_lltoa](SDL_lltoa) - [SDL_log](SDL_log) - [SDL_log10](SDL_log10) - [SDL_log10f](SDL_log10f) - [SDL_logf](SDL_logf) - [SDL_lround](SDL_lround) - [SDL_lroundf](SDL_lroundf) - [SDL_ltoa](SDL_ltoa) - [SDL_malloc](SDL_malloc) - [SDL_memcmp](SDL_memcmp) - [SDL_memcpy](SDL_memcpy) - [SDL_memcpy4](SDL_memcpy4) - [SDL_memmove](SDL_memmove) - [SDL_memset](SDL_memset) - [SDL_memset4](SDL_memset4) - [SDL_pow](SDL_pow) - [SDL_powf](SDL_powf) - [SDL_qsort](SDL_qsort) - [SDL_realloc](SDL_realloc) - [SDL_round](SDL_round) - [SDL_roundf](SDL_roundf) - [SDL_scalbn](SDL_scalbn) - [SDL_scalbnf](SDL_scalbnf) - [SDL_setenv](SDL_setenv) - [SDL_sin](SDL_sin) - [SDL_sinf](SDL_sinf) - [SDL_snprintf](SDL_snprintf) - [SDL_sqrt](SDL_sqrt) - [SDL_sqrtf](SDL_sqrtf) - [SDL_sscanf](SDL_sscanf) - [SDL_strcasecmp](SDL_strcasecmp) - [SDL_strcasestr](SDL_strcasestr) - [SDL_strchr](SDL_strchr) - [SDL_strcmp](SDL_strcmp) - [SDL_strdup](SDL_strdup) - [SDL_strlcat](SDL_strlcat) - [SDL_strlcpy](SDL_strlcpy) - [SDL_strlen](SDL_strlen) - [SDL_strlwr](SDL_strlwr) - [SDL_strncasecmp](SDL_strncasecmp) - [SDL_strncmp](SDL_strncmp) - [SDL_strrchr](SDL_strrchr) - [SDL_strrev](SDL_strrev) - [SDL_strstr](SDL_strstr) - [SDL_strtod](SDL_strtod) - [SDL_strtokr](SDL_strtokr) - [SDL_strtol](SDL_strtol) - [SDL_strtoll](SDL_strtoll) - [SDL_strtoul](SDL_strtoul) - [SDL_strtoull](SDL_strtoull) - [SDL_strupr](SDL_strupr) - [SDL_tan](SDL_tan) - [SDL_tanf](SDL_tanf) - [SDL_tolower](SDL_tolower) - [SDL_toupper](SDL_toupper) - [SDL_trunc](SDL_trunc) - [SDL_truncf](SDL_truncf) - [SDL_uitoa](SDL_uitoa) - [SDL_ulltoa](SDL_ulltoa) - [SDL_ultoa](SDL_ultoa) - [SDL_utf8strlcpy](SDL_utf8strlcpy) - [SDL_utf8strlen](SDL_utf8strlen) - [SDL_utf8strnlen](SDL_utf8strnlen) - [SDL_vasprintf](SDL_vasprintf) - [SDL_vsnprintf](SDL_vsnprintf) - [SDL_vsscanf](SDL_vsscanf) - [SDL_wcscasecmp](SDL_wcscasecmp) - [SDL_wcscmp](SDL_wcscmp) - [SDL_wcsdup](SDL_wcsdup) - [SDL_wcslcat](SDL_wcslcat) - [SDL_wcslcpy](SDL_wcslcpy) - [SDL_wcslen](SDL_wcslen) - [SDL_wcsncasecmp](SDL_wcsncasecmp) - [SDL_wcsncmp](SDL_wcsncmp) - [SDL_wcsstr](SDL_wcsstr) - [_SDL_size_add_overflow_builtin](_SDL_size_add_overflow_builtin) - [_SDL_size_mul_overflow_builtin](_SDL_size_mul_overflow_builtin)