FreeCalypso > hg > freecalypso-sw
view target-utils/libmpffs/findfile.c @ 213:ef7d7da61c56
FFS code integration: remaining C files imported, but not yet integrated
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Mon, 06 Jan 2014 04:20:29 +0000 |
parents | ac310ee73788 |
children |
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#include <sys/types.h> #include "types.h" #include "struct.h" #include "globals.h" #include "macros.h" static u8 * find_endofchunk(ino) { struct inode *irec = mpffs_active_index + ino; u8 *p; int i; p = inode_to_dataptr(irec) + irec->len; for (i = 0; i < 16; i++) { p--; if (!*p) return(p); if (*p != 0xFF) break; } printf("Error: inode #%x has no valid termination\n", ino); return(p); /* XXX */ } mpffs_find_file(pathname, startret, sizeret, continue_ret) char *pathname; u8 **startret; size_t *sizeret; int *continue_ret; { int ino, cont; struct inode *irec; u8 *start, *end; int size; ino = mpffs_pathname_to_inode(pathname); if (ino <= 0) return(-1); irec = mpffs_active_index + ino; if (irec->type != OBJTYPE_FILE) { printf("Error: %s is not a regular file\n", pathname); return(-1); } start = inode_to_dataptr(irec); start += strlen(start) + 1; end = find_endofchunk(ino); size = end - start; if (size < 0) size = 0; cont = irec->descend; if (cont == 0xFFFF) cont = 0; if (startret) *startret = start; if (sizeret) *sizeret = size; if (continue_ret) *continue_ret = cont; return(0); } mpffs_get_segment(ino, startret, sizeret, continue_ret) int ino; u8 **startret; size_t *sizeret; int *continue_ret; { int cont; struct inode *irec; u8 *start, *end; int size; for (;;) { irec = mpffs_active_index + ino; if (irec->type) break; if (irec->sibling == 0xFFFF) { printf("Error: segment inode #%d: deleted and no sibling\n", ino); return(-1); } ino = irec->sibling; } if (irec->type != OBJTYPE_SEGMENT) { printf("Error: inode #%x is not a segment\n", ino); return(-1); } start = inode_to_dataptr(irec); end = find_endofchunk(ino); size = end - start; if (size <= 0) { printf("Error: segment inode #%x: bad length\n", ino); return(-1); } cont = irec->descend; if (cont == 0xFFFF) cont = 0; if (startret) *startret = start; if (sizeret) *sizeret = size; if (continue_ret) *continue_ret = cont; return(0); }