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Don't segfault if 0 is given as argument index

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#326
This commit is contained in:
Linus Dierheimer
2022-11-01 14:54:27 +01:00
parent a8a1f98a8f
commit 45f8b86f13
1 changed files with 9 additions and 1 deletions
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src/common/format.c
+9 -1
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@@ -38,6 +38,14 @@ void ffFormatAppendFormatArg(FFstrbuf* buffer, const FFformatarg* formatarg)
}
}
/**
* @brief parses a string to a uint32_t
*
* If the string can't be parsed, or is < 1, uint32_t max is returned.
*
* @param placeholderValue the string to parse
* @return uint32_t the parsed value
*/
static inline uint32_t getArgumentIndex(const FFstrbuf* placeholderValue)
{
uint32_t result = UINT32_MAX;
@@ -45,7 +53,7 @@ static inline uint32_t getArgumentIndex(const FFstrbuf* placeholderValue)
if(placeholderValue->chars[0] != '-')
sscanf(placeholderValue->chars, "%u", &result);
return result;
return result == 0 ? UINT32_MAX : result;
}
static inline void appendInvalidPlaceholder(FFstrbuf* buffer, const char* start, const FFstrbuf* placeholderValue, uint32_t index, uint32_t formatStringLength)