How to read fastly files ( I/O operation)

[bioinfornatics]

And use size_t instead to int for getChar/getInt method as type 
returned

gdmd -w -O -release monarch.d
~ $ time ./monarch 
/env/cns/proj/projet_AZH/A/RunsSolexa/121114_FLUOR_C16L5ACXX/AZH_AOSC_8_1_C16L5ACXX.IND1_clean.fastq
globalStats:
A: 1007129068. C: 1350576504. G: 1353023772. M:   0. D:   0. S:   
0. H:   0. N: 39413. V:   0. U:   0. W:   0. R:   0. B:   0. Y:   
0. K:   0. T: 999786820.
time: 176585

real	2m56.635s
user	2m31.376s
sys	0m23.077s


this program is little less fast than f's program

about parser I would like create a set a biology parser and put 
into a lib with a set of common compute as letter counter.
By example you could run a letter counter compute throw a fata or 
fastq file.
rename identifier thwow a fata or fastq file.