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/littlefs-2.7.6/tests/
Dtest_exhaustion.toml60 char r;
61 lfs_file_read(&lfs, &file, &r, 1) => 1;
62 assert(r == c);
142 char r;
143 lfs_file_read(&lfs, &file, &r, 1) => 1;
144 assert(r == c);
167 # These are a sort of high-level litmus test for wear-leveling. One definition
168 # of wear-leveling is that increasing a block device's space translates directly
172 [[case]] # wear-level test running a filesystem to exhaustion
233 char r;
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/littlefs-2.7.6/
Dlfs_util.h5 * SPDX-License-Identifier: BSD-3-Clause
11 // LFS_CONFIG as a header file to include (-DLFS_CONFIG=lfs_config.h).
65 // macros must not have side-effects as the macros can be removed for a smaller
130 // toolchain-specific implementations. LFS_NO_INTRINSICS falls back to a more
133 // Min/max functions for unsigned 32-bit numbers
144 return a - (a % alignment); in lfs_aligndown()
148 return lfs_aligndown(a + alignment-1, alignment); in lfs_alignup()
154 return 32 - __builtin_clz(a-1); in lfs_npw2()
156 uint32_t r = 0; in lfs_npw2()
158 a -= 1; in lfs_npw2()
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D.travis.yml4 - CFLAGS=-Werror
5 - MAKEFLAGS=-j
11 - $HOME/.cache/apt
14 _: &install-common
16 - sudo apt-get install python3 python3-pip
17 - sudo pip3 install toml
18 # setup a ram-backed disk to speed up reentrant tests
19 - mkdir disks
20 - sudo mount -t tmpfs -o size=100m tmpfs disks
21 - export TFLAGS="$TFLAGS --disk=disks/disk"
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DDESIGN.md3 A little fail-safe filesystem designed for microcontrollers.
6 | | | .---._____
7 .-----. | |
8 --|o |---| littlefs |
9 --| |---| |
10 '-----' '----------'
16 filesystem that is resilient to power-loss and flash wear without using
19 This document covers the high-level design of littlefs, how it is different
21 low-level details covering every bit on disk, check out [SPEC.md](SPEC.md).
25 The embedded systems littlefs targets are usually 32-bit microcontrollers with
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Dlfs.c5 * SPDX-License-Identifier: BSD-3-Clause
10 #define LFS_BLOCK_NULL ((lfs_block_t)-1)
11 #define LFS_BLOCK_INLINE ((lfs_block_t)-2)
18 rcache->block = LFS_BLOCK_NULL; in lfs_cache_drop()
23 memset(pcache->buffer, 0xff, lfs->cfg->cache_size); in lfs_cache_zero()
24 pcache->block = LFS_BLOCK_NULL; in lfs_cache_zero()
32 if (block >= lfs->cfg->block_count || in lfs_bd_read()
33 off+size > lfs->cfg->block_size) { in lfs_bd_read()
40 if (pcache && block == pcache->block && in lfs_bd_read()
41 off < pcache->off + pcache->size) { in lfs_bd_read()
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/littlefs-2.7.6/scripts/
Dexplode_asserts.py183 'ws': [r'(?:\s|\n|#.*?\n|//.*?\n|/\*.*?\*/)+'],
185 'string': [r'"(?:\\.|[^"])*"', r"'(?:\\.|[^'])\'"],
188 'op': ['strcmp', 'memcmp', '->'],
200 return "expected %r, found %s..." % (
344 inf = open(args.input, 'r') if args.input else sys.stdin
377 parser.add_argument('-o', '--output', required=True,
379 parser.add_argument('-p', '--pattern', action='append',
381 parser.add_argument('--maxwidth', default=MAXWIDTH, type=int,
Dtest.py27 ./scripts/explode_asserts.py $$< -o $$@
31 -include tests/*.d
35 $(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
50 'LFS_BLOCK_CYCLES': -1,
217 print('truncate --size=0', disk)
223 # simulate power-loss after n cycles?
231 ncmd.extend(['-ex', 'r'])
233 ncmd.extend(['-ex', 'up 2'])
236 '-ex', 'b %s:%d' % (self.suite.path, self.code_lineno),
237 '-ex', 'r'])
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Dprefix.py24 name, count3 = re.subn('\\B-D'+from_prefix.upper(),
25 '-D'+to_prefix.upper(), name)
34 'git', 'ls-tree', '-r', '--name-only', 'HEAD']).split()
56 '%s -> %s' % (oldname, newname) if namecount else oldname,
Dreadmdir.py123 mask = 0x7ff & ~((1 << prefix)-1)
128 type, prefix//4, self.type & ((1 << prefix)-1))
141 return 'Tag(%r, %d, %d)' % (self.typerepr(), self.id, self.size)
182 while len(block) - off >= 4:
240 return not ((other.rev - self.rev) & 0x80000000)
258 tag.id <= gtag.id - gdiff):
259 if tag.is_('create') and tag.id == gtag.id - gdiff:
266 (int(gmask) & int(gtag.chid(gtag.id - gdiff)))):
276 f.write("%-8s %-8s %-13s %4s %4s" % (
283 f.write("%08x: %08x %-13s %4s %4s" % (
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