FreeCalypso > hg > freecalypso-tools
view ffstools/tiffs-rd/object.c @ 995:74024eb17e04
fc-loadtool help: improve language regarding 16 MiB flash chips
In FC project history, 16 MiB flash originally meant Pirelli DP-L10.
Then we got FCDEV3B with the same flash (our own design), but now we are
discovering more Calypso devices that used such large flash, both late
Calypso era (Sony Ericsson K2x0) as well as much earlier ones (FIC FLUID
devices.txt file with 2004 dates, Leonardo+ rev 5). Hence we need to
migrate to more generic or neutral language in associated documentation,
without giving elevated status to specific examples that drove our
early project history.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 03 Dec 2023 21:11:12 +0000 |
parents | 1f27fc13eab7 |
children |
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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" object_name_mincheck(ino) { struct inode_info *inf = inode_info[ino]; u8 *p, *endp; if (!inf->len) return(0); p = inf->dataptr; endp = p + inf->len; for (; ; p++) { if (p >= endp) return(0); if (!*p) break; } inf->byte_after_name = p + 1; return(1); } 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; } } }