diff options
Diffstat (limited to 'binfile.c')
| -rw-r--r-- | binfile.c | 59 |
1 files changed, 47 insertions, 12 deletions
@@ -2,20 +2,23 @@ #ifdef TOC_DEBUG #define BINFILE_PRINT +static bool binfile_printing_enabled = true; #endif static inline void write_u8(FILE *fp, U8 u8) { putc(u8, fp); #ifdef BINFILE_PRINT - static int col = 0; - printf("%02x ", u8); - ++col; - if (col == 8) printf(" "); - if (col == 16) { - col = 0; - printf("\n"); + if (binfile_printing_enabled) { + static int col = 0; + printf("%02x ", u8); + ++col; + if (col == 8) printf(" "); + if (col == 16) { + col = 0; + printf("\n"); + } + fflush(stdout); } - fflush(stdout); #endif } @@ -171,10 +174,20 @@ static F32 read_f32(FILE *fp) { #ifdef TOC_PORTABLE /* TODO: infinity, NaN */ U32 u32 = read_u32(fp); - U32 sign = (u32 & 0x8000000); - U32 exponent = (u32 & 0x7f80000) >> 23; - U32 fraction = (u32 & 0x007ffff); - /* TODO: finish me */ + U32 sign = (u32 & 0x80000000); + U32 exponent = (u32 & 0x7f800000) >> 23; + U32 fraction = (u32 & 0x007fffff); + F32 flt = (float)fraction; + I32 signed_exponent = (I32)exponent - 127; + while (signed_exponent < 0) { + ++signed_exponent; + flt /= (F32)2; + } + while (signed_exponent > 0) { + --signed_exponent; + flt *= (F32)2; + } + if (sign) flt = -flt; #else F32 f32; fread(&f32, sizeof f32, 1, fp); @@ -231,3 +244,25 @@ static void write_vlq(FILE *fp, U64 x) { } write_u8(fp, (U8)x); } + +#ifdef TOC_DEBUG +static void binfile_test(void) { + binfile_printing_enabled = false; + FILE *fp = tmpfile(); + /* U64 a = 12387217312; */ + /* write_vlq(fp, a); */ + I64 b = -123981232131; + write_i64(fp, b); + U8 c = 12; + write_u8(fp, c); + float d = -2.323198123f; + write_f32(fp, d); + fseek(fp, 0L, SEEK_SET); + /* assert(read_vlq(fp) == a); */ + assert(read_i64(fp) == b); + assert(read_u8(fp) == c); + assert(read_f32(fp) == d); + fclose(fp); + binfile_printing_enabled = true; +} +#endif |