Add a maximum allocation size when decoding

[flavray]

Fixes #40

Upon bogus input data, decoding could allocate an insane amount of
memory (if length field is misencoded to a huge number) and panic.
To avoid this behaviour, this change introduces a limit (default 512MB)
to any allocation that can be done when decoding data.

Also return errors when decoding bogus int/long causing overflows.

Benchmark don't seem impacted by the change

New
running 14 tests
test bench_big_schema_read_100000_record   ... bench: 122,871,823 ns/iter (+/- 9,714,148)
test bench_big_schema_read_10000_record    ... bench:  12,737,304 ns/iter (+/- 2,848,853)
test bench_big_schema_read_100_record      ... bench:     134,765 ns/iter (+/- 19,624)
test bench_big_schema_read_1_record        ... bench:      16,293 ns/iter (+/- 7,916)
test bench_big_schema_write_10000_record   ... bench:   3,403,443 ns/iter (+/- 1,774,628)
test bench_big_schema_write_100_record     ... bench:      26,402 ns/iter (+/- 11,252)
test bench_big_schema_write_1_record       ... bench:       4,644 ns/iter (+/- 2,646)
test bench_file_quickstop_null             ... bench:   3,758,407 ns/iter (+/- 1,489,760)
test bench_small_schema_read_10000_record  ... bench:   1,803,131 ns/iter (+/- 211,538)
test bench_small_schema_read_100_record    ... bench:      20,728 ns/iter (+/- 16,671)
test bench_small_schema_read_1_record      ... bench:       3,730 ns/iter (+/- 2,076)
test bench_small_schema_write_10000_record ... bench:     342,308 ns/iter (+/- 148,995)
test bench_small_schema_write_100_record   ... bench:       5,753 ns/iter (+/- 2,938)
test bench_small_schema_write_1_record     ... bench:       2,418 ns/iter (+/- 1,512)

test result: ok. 0 passed; 0 failed; 0 ignored; 14 measured; 0 filtered out

     Running target/release/deps/serde_json-3308dbc1bdb10823

running 1 test
test bench_big_schema_json_read_10000_record ... bench:  43,558,406 ns/iter (+/- 8,259,033)

running 14 tests
test bench_big_schema_read_100000_record   ... bench: 122,871,823 ns/iter (+/- 9,714,148)
test bench_big_schema_read_10000_record    ... bench:  12,737,304 ns/iter (+/- 2,848,853)
test bench_big_schema_read_100_record      ... bench:     134,765 ns/iter (+/- 19,624)
test bench_big_schema_read_1_record        ... bench:      16,293 ns/iter (+/- 7,916)
test bench_big_schema_write_10000_record   ... bench:   3,403,443 ns/iter (+/- 1,774,628)
test bench_big_schema_write_100_record     ... bench:      26,402 ns/iter (+/- 11,252)
test bench_big_schema_write_1_record       ... bench:       4,644 ns/iter (+/- 2,646)
test bench_file_quickstop_null             ... bench:   3,758,407 ns/iter (+/- 1,489,760)
test bench_small_schema_read_10000_record  ... bench:   1,803,131 ns/iter (+/- 211,538)
test bench_small_schema_read_100_record    ... bench:      20,728 ns/iter (+/- 16,671)
test bench_small_schema_read_1_record      ... bench:       3,730 ns/iter (+/- 2,076)
test bench_small_schema_write_10000_record ... bench:     342,308 ns/iter (+/- 148,995)
test bench_small_schema_write_100_record   ... bench:       5,753 ns/iter (+/- 2,938)
test bench_small_schema_write_1_record     ... bench:       2,418 ns/iter (+/- 1,512)

test result: ok. 0 passed; 0 failed; 0 ignored; 14 measured; 0 filtered out

     Running target/release/deps/serde_json-3308dbc1bdb10823

running 1 test
test bench_big_schema_json_read_10000_record ... bench:  43,558,406 ns/iter (+/- 8,259,033)

test result: ok. 0 passed; 0 failed; 0 ignored; 1 measured; 0 filtered out

     Running target/release/deps/single-ed0c4c0d15cd731f

running 2 tests
test bench_big_schema_write_record   ... bench:       1,470 ns/iter (+/- 208)
test bench_small_schema_write_record ... bench:         216 ns/iter (+/- 58)

master
running 14 tests
test bench_big_schema_read_100000_record   ... bench: 128,860,834 ns/iter (+/- 14,941,030)
test bench_big_schema_read_10000_record    ... bench:  12,426,272 ns/iter (+/- 1,840,947)
test bench_big_schema_read_100_record      ... bench:     145,451 ns/iter (+/- 25,811)
test bench_big_schema_read_1_record        ... bench:      16,981 ns/iter (+/- 5,188)
test bench_big_schema_write_10000_record   ... bench:   2,682,114 ns/iter (+/- 554,021)
test bench_big_schema_write_100_record     ... bench:      29,087 ns/iter (+/- 8,408)
test bench_big_schema_write_1_record       ... bench:       4,711 ns/iter (+/- 2,229)
test bench_file_quickstop_null             ... bench:   4,171,361 ns/iter (+/- 5,748,732)
test bench_small_schema_read_10000_record  ... bench:   2,255,414 ns/iter (+/- 1,124,975)
test bench_small_schema_read_100_record    ... bench:      23,436 ns/iter (+/- 12,716)
test bench_small_schema_read_1_record      ... bench:       4,151 ns/iter (+/- 4,216)
test bench_small_schema_write_10000_record ... bench:     397,890 ns/iter (+/- 88,784)
test bench_small_schema_write_100_record   ... bench:       6,349 ns/iter (+/- 1,322)
test bench_small_schema_write_1_record     ... bench:       2,400 ns/iter (+/- 577)

test result: ok. 0 passed; 0 failed; 0 ignored; 14 measured; 0 filtered out

     Running target/release/deps/serde_json-e71f91dffbbddc9a

running 1 test
test bench_big_schema_json_read_10000_record ... bench:  41,608,440 ns/iter (+/- 16,529,868)

test result: ok. 0 passed; 0 failed; 0 ignored; 1 measured; 0 filtered out

     Running target/release/deps/single-d0d7f7569f4fedb1

running 2 tests
test bench_big_schema_write_record   ... bench:       1,289 ns/iter (+/- 451)
test bench_small_schema_write_record ... bench:         176 ns/iter (+/- 19)

make lint decided to change a bunch of stuff. Changes don't look terrible :)

[poros]

Awesome!