FreeCalypso > hg > freecalypso-tools
view ffstools/tiffs-rd/object.c @ 619:f82551c77e58
libserial-newlnx: ASYNC_LOW_LATENCY patch reverted
Reports from Das Signal indicate that loadtools performance on Debian
is about the same as on Slackware, and that including or omitting the
ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the
patch in question does not appear to be necessary, it is being reverted
until and unless someone other than Serg reports an actual real-world
system on which loadtools operation times are slowed compared to the
Mother's Slackware reference and on which Slackware-like performance
can be restored by setting the ASYNC_LOW_LATENCY flag.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Thu, 27 Feb 2020 01:09:48 +0000 |
parents | e7502631a0f9 |
children | 1f27fc13eab7 |
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/* * This C module implements object-level analysis. */ #include <sys/types.h> #include <ctype.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "types.h" #include "struct.h" #include "globals.h" #include "pathname.h" validate_obj_name(ino, root_special) { struct inode_info *inf = inode_info[ino]; u8 *p, *endp; int c; if (!inf->len) return(0); p = inf->dataptr; endp = p + inf->len; for (; ; p++) { if (p >= endp) return(0); c = *p; if (!c) break; if (c < ' ' || c > '~') return(0); if (root_special || isalnum(c)) continue; switch (c) { case '.': case ',': case '_': case '-': case '+': case '%': case '$': case '#': continue; default: return(0); } } if (!root_special) { c = p - inf->dataptr; if (c < 1 || c > MAX_FN_COMPONENT) return(0); if (!strcmp(inf->dataptr, ".") || !strcmp(inf->dataptr, "..")) return(0); } inf->byte_after_name = p + 1; return(1); } u8 * find_end_of_chunk(inf) struct inode_info *inf; { u8 *p; int i; p = inf->dataptr + inf->len; for (i = 1; i <= 16; i++) { if (!p[-i]) return(p - i); if (p[-i] != 0xFF) break; } fprintf(stderr, "error: chunk @%x (inode #%x): no valid termination found\n", inf->offset, inf->ino); return(p); /* bogon, allows the rest to continue */ } size_head_chunk(inf, chi) struct inode_info *inf; struct chunkinfo *chi; { chi->start = inf->byte_after_name; chi->end = find_end_of_chunk(inf); if (chi->start >= chi->end) { chi->len = 0; return(0); } else { chi->len = chi->end - chi->start; return(1); } } size_extra_chunk(inf, chi) struct inode_info *inf; struct chunkinfo *chi; { chi->start = inf->dataptr; chi->end = find_end_of_chunk(inf); chi->len = chi->end - chi->start; } void iterate_seg_file(seghead, callback, callback_data, deleted, verbose) void (*callback)(); u_long callback_data; { int ino; struct inode_info *inf; for (ino = inode_info[seghead]->descend; ino; ino = inf->descend) { loop: if (!validate_inode(ino)) { fprintf(stderr, "error: following seg file hit invalid inode #%x\n", ino); return; } inf = inode_info[ino]; switch (inf->type) { case 0xF4: callback(inf, callback_data); continue; case 0x00: if (deleted) { if (inf->len) callback(inf, callback_data); else fprintf(stderr, "error: presumed deleted segment inode #%x has been reclaimed\n", ino); continue; } if (!inf->sibling) { fprintf(stderr, "error: segment object at inode #%x: marked deleted, but no sibling\n", ino); return; } if (verbose) printf("seg inode #%x deleted, moved to #%x\n", ino, inf->sibling); ino = inf->sibling; goto loop; default: fprintf(stderr, "error: inode #%x: unexpected type %02X when expecting segment (F4)\n", ino, inf->type); return; } } }