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libretro-common: improve PRI_SIZET for non-windows platforms

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In non-windows platfoms, the `size_t` type may not necessarily use
the `%lu` format specification. For example in 32 bits platforms
instead it needs to be `%u`. Therefore, for non-windows platforms,
it is better to define PRI_SIZET more precisely.

Silences these types of warnings in 32 bits non-windows platforms:

    libretro-common/file/config_file.c: In function ‘config_get_size_t’:
    libretro-common/file/config_file.c:694:32: warning: format ‘%lu’ expects
    argument of type ‘long unsigned int *’, but argument 3 has type
    ‘size_t * {aka unsigned int *}’ [-Wformat=]
           if (sscanf(entry->value, "%" PRI_SIZET, &val) == 1)
                                    ^~~

Discussed in #8191
This commit is contained in:
Hugo Hromic 2019-02-07 16:25:48 +00:00
parent 4ce93b11ee
commit e2b620ae05
1 changed files with 14 additions and 6 deletions
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20
libretro-common/include/retro_miscellaneous.h
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@ -159,14 +159,22 @@ typedef struct
# ifdef _WIN64
# define PRI_SIZET PRIu64
# else
#if _MSC_VER == 1800
# define PRI_SIZET PRIu32
#else
# define PRI_SIZET "u"
#endif
# if _MSC_VER == 1800
# define PRI_SIZET PRIu32
# else
# define PRI_SIZET "u"
# endif
# endif
#else
# define PRI_SIZET "lu"
# if (SIZE_MAX == 0xFFFF)
# define PRI_SIZET "hu"
# elif (SIZE_MAX == 0xFFFFFFFF)
# define PRI_SIZET "u"
# elif (SIZE_MAX == 0xFFFFFFFFFFFFFFFF)
# define PRI_SIZET "lu"
# else
# error PRI_SIZET: unknown SIZE_MAX
# endif
#endif
#endif