57f0e47efc
The signed and unsigned fixed-width integers (int32_t, uint32_t etc.) are optional in C99 (and above). Use the non-optional minimum-width integers (int_fast32_t, uint_fast32_t and int_least32_t, uint_least32_t etc.) instead. To simulate unsigned wrap-around, use the GUF_UWRAP macros in guf_common.h cf. https://en.cppreference.com/w/c/types/integer (last-retrieved: 2025-05-18)
103 lines
5.4 KiB
Python
103 lines
5.4 KiB
Python
"""
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Generate typesafe min, max and clamp functions for libguf/src/guf_math.h
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"""
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from dataclasses import dataclass
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import textwrap
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@dataclass
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class IntType:
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INT_TYPE: str
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INT_TYPE_ABBR: str
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INT_MIN: str
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INT_MAX: str
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is_optional: bool = False
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@dataclass
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class UintType:
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INT_TYPE: str
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INT_TYPE_ABBR: str
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INT_MIN: str
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INT_MAX: str
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is_optional: bool = False
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def gen_min_max_clamp(int_types: list, uint_types: list) -> str:
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template = textwrap.dedent("""\
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static inline {type} guf_min_{type_abbr}({type} a, {type} b) {{ return a < b ? a : b; }}
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static inline {type} guf_max_{type_abbr}({type} a, {type} b) {{ return a > b ? a : b; }}
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static inline {type} guf_clamp_{type_abbr}({type} x, {type} min, {type} max) {{ if (x < min) {{return min;}} if (x > max) {{return max;}} return x; }}
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""")
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result = "\n// Signed min, max, clamp functions (generated with libguf/tools/min_max_clamp-gen.py)\n"
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for t in int_types:
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if t.is_optional:
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result += "#ifdef {int_max}\n".format(int_max = t.INT_MAX)
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result += template.format(type = t.INT_TYPE, type_abbr = t.INT_TYPE_ABBR)
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if t.is_optional:
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result += "#endif\n"
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result += "\n"
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result += "\n// Unsigned min, max, clamp functions (generated with libguf/tools/min_max_clamp-gen.py)\n"
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for t in uint_types:
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if t.is_optional:
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result +="#ifdef {int_max}\n".format(int_max = t.INT_MAX)
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result += template.format(type = t.INT_TYPE, type_abbr = t.INT_TYPE_ABBR)
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if t.is_optional:
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result += "#endif\n"
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result += "\n"
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return result
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if __name__ == "__main__":
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int_types = [
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IntType(INT_TYPE = "char", INT_TYPE_ABBR = "char", INT_MIN = "CHAR_MIN", INT_MAX = "CHAR_MAX"),
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IntType(INT_TYPE = "int", INT_TYPE_ABBR = "int", INT_MIN = "INT_MIN", INT_MAX = "INT_MAX"),
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IntType(INT_TYPE = "long", INT_TYPE_ABBR = "long", INT_MIN = "LONG_MIN", INT_MAX = "LONG_MAX"),
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IntType(INT_TYPE = "long long", INT_TYPE_ABBR = "long_long", INT_MIN = "LLONG_MIN", INT_MAX = "LLONG_MAX"),
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IntType(INT_TYPE = "ptrdiff_t", INT_TYPE_ABBR = "ptrdiff_t", INT_MIN = "PTRDIFF_MIN", INT_MAX = "PTRDIFF_MAX"),
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IntType(INT_TYPE = "int_fast8_t", INT_TYPE_ABBR = "i8_fast", INT_MIN = "GUF_INT8_MIN", INT_MAX = "GUF_INT8_MAX"),
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IntType(INT_TYPE = "int_fast16_t", INT_TYPE_ABBR = "i16_fast", INT_MIN = "GUF_INT16_MIN", INT_MAX = "GUF_INT16_MAX"),
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IntType(INT_TYPE = "int_fast32_t", INT_TYPE_ABBR = "i32_fast", INT_MIN = "GUF_INT32_MIN", INT_MAX = "GUF_INT32_MAX"),
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IntType(INT_TYPE = "int_fast64_t", INT_TYPE_ABBR = "i64_fast", INT_MIN = "GUF_INT64_MIN", INT_MAX = "GUF_INT64_MAX"),
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IntType(INT_TYPE = "float", INT_TYPE_ABBR = "f32", INT_MIN = "-FLT_MAX", INT_MAX = "FLT_MAX"),
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IntType(INT_TYPE = "double", INT_TYPE_ABBR = "f64", INT_MIN = "-DBL_MAX", INT_MAX = "DBL_MAX"),
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IntType(INT_TYPE = "int8_t", INT_TYPE_ABBR = "i8", INT_MIN = "INT8_MIN", INT_MAX = "INT8_MAX", is_optional=True),
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IntType(INT_TYPE = "int16_t", INT_TYPE_ABBR = "i16", INT_MIN = "INT16_MIN", INT_MAX = "INT16_MAX", is_optional=True),
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IntType(INT_TYPE = "int32_t", INT_TYPE_ABBR = "i32", INT_MIN = "INT32_MIN", INT_MAX = "INT32_MAX", is_optional=True),
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IntType(INT_TYPE = "int64_t", INT_TYPE_ABBR = "i64", INT_MIN = "INT64_MIN", INT_MAX = "INT64_MAX", is_optional=True),
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]
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uint_types = [
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UintType(INT_TYPE = "unsigned char", INT_TYPE_ABBR = "uchar", INT_MIN = "0", INT_MAX = "UCHAR_MAX"),
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UintType(INT_TYPE = "unsigned", INT_TYPE_ABBR = "unsigned", INT_MIN = "0", INT_MAX = "UINT_MAX"),
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UintType(INT_TYPE = "unsigned long", INT_TYPE_ABBR = "ulong", INT_MIN = "0", INT_MAX = "ULONG_MAX"),
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UintType(INT_TYPE = "unsigned long long", INT_TYPE_ABBR = "ulong_long", INT_MIN = "0", INT_MAX = "ULLONG_MAX"),
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UintType(INT_TYPE = "size_t", INT_TYPE_ABBR = "size_t", INT_MIN = "0", INT_MAX = "SIZE_MAX"),
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UintType(INT_TYPE = "uint_fast8_t", INT_TYPE_ABBR = "u8_fast", INT_MIN = "0", INT_MAX = "GUF_UINT8_MAX"),
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UintType(INT_TYPE = "uint_fast16_t", INT_TYPE_ABBR = "u16_fast", INT_MIN = "0", INT_MAX = "GUF_UINT16_MAX"),
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UintType(INT_TYPE = "uint_fast32_t", INT_TYPE_ABBR = "u32_fast", INT_MIN = "0", INT_MAX = "GUF_UINT32_MAX"),
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UintType(INT_TYPE = "uint_fast64_t", INT_TYPE_ABBR = "u64_fast", INT_MIN = "0", INT_MAX = "GUF_UINT64_MAX"),
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UintType(INT_TYPE = "uint8_t", INT_TYPE_ABBR = "u8", INT_MIN = "0", INT_MAX = "UINT8_MAX", is_optional=True),
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UintType(INT_TYPE = "uint16_t", INT_TYPE_ABBR = "u16", INT_MIN = "0", INT_MAX = "UINT16_MAX", is_optional=True),
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UintType(INT_TYPE = "uint32_t", INT_TYPE_ABBR = "u32", INT_MIN = "0", INT_MAX = "UINT32_MAX", is_optional=True),
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UintType(INT_TYPE = "uint64_t", INT_TYPE_ABBR = "u64", INT_MIN = "0", INT_MAX = "UINT64_MAX", is_optional=True),
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]
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code = gen_min_max_clamp(int_types=int_types, uint_types=uint_types)
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print(code)
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