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Fix #10438: [GS] Validate story page element type for ScriptStoryPage::NewElement (#11888)

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Fixes a crash that happens if an invalid StoryPageElementType is passed to ScriptStoryPage::NewElement.

Adds an enforced precondition that tests the validity of StoryPageElementType.

Adds GSStoryPage::IsValidStoryPageElementType to the API.
This commit is contained in:
SamuXarick 2024-01-27 21:11:02 +00:00 committed by GitHub
parent 6d276698b6
commit 76f0f9e386
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3 changed files with 15 additions and 0 deletions
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1
src/script/api/game_changelog.hpp
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@ -81,6 +81,7 @@
* \li GSGoal::SetDestination
* \li GSIndustry::GetProductionLevel
* \li GSIndustry::SetProductionLevel
* \li GSStoryPage::IsValidStoryPageElementType
*
* API removals:
* \li GSError::ERR_PRECONDITION_TOO_MANY_PARAMETERS, that error is never returned anymore.

6
src/script/api/script_story_page.cpp
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@ -38,6 +38,11 @@ static inline bool StoryPageElementTypeRequiresText(StoryPageElementType type)
return ::StoryPageElement::IsValidID(story_page_element_id);
}
/* static */ bool ScriptStoryPage::IsValidStoryPageElementType(StoryPageElementType type)
{
return type == SPET_TEXT || type == SPET_LOCATION || type == SPET_GOAL || type == SPET_BUTTON_PUSH || type == SPET_BUTTON_TILE || type == SPET_BUTTON_VEHICLE;
}
/* static */ ScriptStoryPage::StoryPageID ScriptStoryPage::New(ScriptCompany::CompanyID company, Text *title)
{
CCountedPtr<Text> counter(title);
@ -63,6 +68,7 @@ static inline bool StoryPageElementTypeRequiresText(StoryPageElementType type)
EnforceDeityMode(STORY_PAGE_ELEMENT_INVALID);
EnforcePrecondition(STORY_PAGE_ELEMENT_INVALID, IsValidStoryPage(story_page_id));
EnforcePrecondition(STORY_PAGE_ELEMENT_INVALID, IsValidStoryPageElementType(type));
std::string encoded_text;
if (StoryPageElementTypeRequiresText(btype)) {
EnforcePrecondition(STORY_PAGE_ELEMENT_INVALID, text != nullptr);

8
src/script/api/script_story_page.hpp
View File

@ -179,6 +179,13 @@ public:
*/
static bool IsValidStoryPageElement(StoryPageElementID story_page_element_id);
/**
* Check whether this is a valid story page element type.
* @param type The StoryPageElementType to check.
* @return True if and only if this story page element type is valid.
*/
static bool IsValidStoryPageElementType(StoryPageElementType type);
/**
* Create a new story page.
* @param company The company to create the story page for, or ScriptCompany::COMPANY_INVALID for all.
@ -202,6 +209,7 @@ public:
* @return The new StoryPageElementID, or STORY_PAGE_ELEMENT_INVALID if it failed.
* @pre ScriptCompanyMode::IsDeity().
* @pre IsValidStoryPage(story_page).
* @pre IsValidStoryPageElementType(type).
* @pre (type != SPET_TEXT && type != SPET_LOCATION) || (text != null && len(text) != 0).
* @pre type != SPET_LOCATION || ScriptMap::IsValidTile(reference).
* @pre type != SPET_GOAL || ScriptGoal::IsValidGoal(reference).