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Introduce formal policy for APIs that return strings.

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This declares that any `const char *` returned from SDL is owned by SDL, and
promises to be valid _at least_ until the next time the event queue runs, or
SDL_Quit() is called, even if the thing that owns the string gets destroyed
or changed before then.

This is noted in the headers as "the SDL_GetStringRule", so this will both be
greppable to find a detailed explaination in docs/README-strings.md and
wikiheaders will automatically turn it into a link we can point at the
appropriate documentation.

Fixes #9902.

(and several FIXMEs, both known and yet-undocumented.)
This commit is contained in:
Ryan C. Gordon 2024-06-01 22:05:21 -04:00
parent b1f3682216
commit e23257307e
51 changed files with 262 additions and 123 deletions
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4
include/SDL3/SDL_haptic.h
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@ -948,6 +948,8 @@ extern SDL_DECLSPEC SDL_HapticID *SDLCALL SDL_GetHaptics(int *count);
*
* This can be called before any haptic devices are opened.
*
* The returned string follows the SDL_GetStringRule.
*
* \param instance_id the haptic device instance ID
* \returns the name of the selected haptic device. If no name can be found,
* this function returns NULL; call SDL_GetError() for more
@ -1011,6 +1013,8 @@ extern SDL_DECLSPEC SDL_HapticID SDLCALL SDL_GetHapticInstanceID(SDL_Haptic *hap
/**
* Get the implementation dependent name of a haptic device.
*
* The returned string follows the SDL_GetStringRule.
*
* \param haptic the SDL_Haptic obtained from SDL_OpenJoystick()
* \returns the name of the selected haptic device. If no name can be found,
* this function returns NULL; call SDL_GetError() for more