mirror of https://git.wuffs.org/MWCC
391 lines
8.0 KiB
C
391 lines
8.0 KiB
C
#include "oslib.h"
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#include <errno.h>
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extern char STSbuf[256];
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typedef struct DirNode {
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char *name;
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unsigned int dirID;
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union {
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struct DirNode *parent;
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struct VolNode *volume;
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} p;
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struct DirNode *list;
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struct DirNode *next;
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} DirNode;
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typedef struct VolNode {
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UInt16 vRefNum;
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DirNode root;
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struct VolNode *next;
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} VolNode;
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static unsigned int lastDirID = 3;
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static unsigned int lastVolRef = 2;
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static char stname[256];
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static char stpath[256];
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static char stdir[256];
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static char stvol[8];
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static unsigned int dirMapRows;
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static DirNode **dirIDMap[256];
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static VolNode *vols;
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static int AddDirMapEntry(DirNode *node) {
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unsigned int row;
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unsigned int col;
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row = node->dirID >> 8;
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col = node->dirID & 0xFF;
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while (row >= dirMapRows) {
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if (row >= 256) {
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fprintf(stderr, "Fatal error: too many directories referenced, out of memory\n");
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return 0;
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}
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dirIDMap[row] = calloc(sizeof(DirNode *), 256);
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if (!dirIDMap[row])
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return 0;
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dirMapRows++;
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}
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dirIDMap[row][col] = node;
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return 1;
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}
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static VolNode *FindOrAddVolRef(VolNode **list, char *name) {
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int sz;
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VolNode *vn;
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while (*list) {
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if (OS_EqualPath(name, (*list)->root.name))
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return *list;
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list = &(*list)->next;
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}
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if (lastVolRef >= 256)
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return 0;
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vn = malloc(sizeof(VolNode));
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if (!vn)
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return 0;
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vn->next = 0;
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vn->vRefNum = lastVolRef++;
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sz = strlen(name) + 1;
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vn->root.name = malloc(sz);
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if (!vn->root.name)
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return 0;
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strcpy(vn->root.name, name);
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vn->root.dirID = 2;
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vn->root.p.volume = vn;
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vn->root.list = 0;
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vn->root.next = 0;
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*list = vn;
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return vn;
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}
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static DirNode *FindDirMapEntry(unsigned int dirID) {
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unsigned int row;
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unsigned int col;
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row = dirID >> 8;
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col = dirID & 0xFF;
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#line 166
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OPTION_ASSERT(dirID != 2);
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if (row >= dirMapRows)
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return 0;
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else
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return dirIDMap[row][col];
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}
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static DirNode *FindOrAddDirRef(DirNode *parent, char *name) {
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int sz;
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DirNode *dn;
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DirNode **list;
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list = &parent->list;
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while (*list) {
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if (OS_EqualPath(name, (*list)->name))
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return *list;
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list = &(*list)->next;
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}
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if (lastDirID >= 0x10000)
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return 0;
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sz = strlen(name) + 1;
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dn = malloc(sizeof(DirNode));
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if (!dn)
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return 0;
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dn->name = malloc(sz);
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if (!dn->name)
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return 0;
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strcpy(dn->name, name);
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dn->list = 0;
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dn->next = 0;
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dn->dirID = lastDirID++;
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if (!AddDirMapEntry(dn))
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return 0;
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dn->p.parent = parent;
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*list = dn;
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return dn;
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}
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static int FindOrAdd(const OSPathSpec *path, unsigned int *vRefNum, unsigned int *dirID) {
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VolNode *vol;
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DirNode *level;
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char pb[256];
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char voln[8];
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char pathbuf[256];
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char *ptr;
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char *st;
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char ch;
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if (!OS_PathSpecToString(path, pathbuf, 256))
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return 0;
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if (!pathbuf[0])
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return 0;
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ptr = OS_GetDirPtr(pathbuf);
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strncpy(voln, pathbuf, ptr - pathbuf);
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voln[ptr - pathbuf] = 0;
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strcpy(pb, ptr);
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vol = FindOrAddVolRef(&vols, voln);
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if (!vol)
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return 0;
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*vRefNum = vol->vRefNum;
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level = &vol->root;
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ptr = &pb[1];
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#line 267
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OPTION_ASSERT(*pb == OS_PATHSEP);
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while (*ptr) {
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st = ptr;
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while ((ch = *ptr) && *ptr != OS_PATHSEP) {
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++ptr;
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}
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*ptr = 0;
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level = FindOrAddDirRef(level, st);
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if (!ch)
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break;
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++ptr;
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if (!level)
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return 0;
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}
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*dirID = level->dirID;
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return 1;
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}
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static void StepVolDir(unsigned int *vRefNum, unsigned int *dirID, DirNode **node) {
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VolNode *step;
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if (*vRefNum == 1) {
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*node = 0;
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return;
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}
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if (*dirID == 2) {
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step = vols;
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while (step && step->vRefNum != *vRefNum)
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step = step->next;
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if (step) {
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*node = &step->root;
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*vRefNum = 1;
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*dirID = 1;
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} else {
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*node = 0;
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}
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} else {
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*node = FindDirMapEntry(*dirID);
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if (*node)
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*dirID = (*node)->p.parent->dirID;
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}
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}
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static int ResolvePath(const OSPathSpec *path, unsigned int *vRefNum, unsigned int *dirID) {
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if (FindOrAdd(path, vRefNum, dirID)) {
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*vRefNum = -*vRefNum;
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return 1;
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} else {
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*vRefNum = 0;
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*dirID = 0;
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return 0;
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}
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}
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static int ResolveVolDir(unsigned int vRefNum, unsigned int dirID, char *vol, char *dir) {
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DirNode *nodes[256];
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DirNode *cur;
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int idx;
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int len;
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char *dptr;
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vRefNum = -vRefNum;
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idx = 0;
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do {
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StepVolDir(&vRefNum, &dirID, &cur);
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if (cur)
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nodes[idx++] = cur;
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} while (cur);
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if (idx) {
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strcpy(vol, nodes[--idx]->name);
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} else {
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vol[0] = 0;
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dir[0] = 0;
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return 0;
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}
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dptr = dir;
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*(dptr++) = OS_PATHSEP;
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while (idx--) {
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len = strlen(nodes[idx]->name);
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if ((dptr - dir) + len + 1 > 256) {
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*dptr = 0;
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return 0;
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} else {
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memcpy(dptr, nodes[idx]->name, len);
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dptr += len;
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*(dptr++) = OS_PATHSEP;
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}
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}
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*dptr = 0;
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return 1;
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}
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int OS_OSPathSpec_To_VolDir(const OSPathSpec *spec, SInt16 *vRefNum, SInt32 *dirID) {
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unsigned int vol;
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unsigned int dir;
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if (ResolvePath(spec, &vol, &dir)) {
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*vRefNum = vol;
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*dirID = dir;
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return 0;
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} else {
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*vRefNum = 0;
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*dirID = 0;
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return ENOENT;
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}
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}
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int OS_OSSpec_To_FSSpec(const OSSpec *spec, FSSpec *fss) {
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int err;
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SInt16 vRefNum;
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SInt32 dirID;
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char *s;
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err = OS_OSPathSpec_To_VolDir(&spec->path, &vRefNum, &dirID);
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fss->vRefNum = vRefNum;
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fss->parID = dirID;
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if (err) return err;
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s = OS_NameSpecToString(&spec->name, STSbuf, sizeof(STSbuf));
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if (!s || strlen(s) >= 256)
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return ENAMETOOLONG;
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c2pstrcpy(fss->name, s);
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return 0;
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}
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int OS_VolDir_To_OSNameSpec(SInt16 vRefNum, SInt32 dirID, OSNameSpec *spec, SInt32 *parID) {
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unsigned int cv;
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unsigned int cd;
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DirNode *node;
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cv = -vRefNum;
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cd = dirID;
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StepVolDir(&cv, &cd, &node);
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if (!node)
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return ENOENT;
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*parID = cd;
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return OS_MakeNameSpec(node->name, spec);
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}
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int OS_VolDir_To_OSPathSpec(SInt16 vRefNum, SInt32 dirID, OSPathSpec *spec) {
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int err;
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int vlen;
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int dlen;
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if (!vRefNum || !dirID) {
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err = OS_GetCWD(spec);
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if (err)
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return err;
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} else {
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if (!ResolveVolDir(vRefNum, dirID, stvol, stdir))
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return ENOENT;
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vlen = strlen(stvol);
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dlen = strlen(stdir);
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if (vlen + dlen < 256) {
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memcpy(spec->s, stvol, vlen);
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memcpy(spec->s + vlen, stdir, dlen + 1);
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}
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}
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return 0;
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}
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int OS_FSSpec_To_OSSpec(const FSSpec *fss, OSSpec *spec) {
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int err;
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err = OS_VolDir_To_OSPathSpec(fss->vRefNum, fss->parID, &spec->path);
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if (err)
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return err;
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p2cstrcpy(stname, fss->name);
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err = OS_MakeNameSpec(stname, &spec->name);
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if (err)
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return err;
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return err;
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}
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int OS_GetRsrcOSSpec(const OSSpec *spec, OSSpec *rspec, Boolean create) {
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char dbuffer[256];
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int err;
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OS_PathSpecToString(&spec->path, dbuffer, sizeof(dbuffer));
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err = OS_MakeSpec2(dbuffer, "resource.frk", rspec);
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if (err)
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return err;
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err = OS_Status(rspec);
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if (err) {
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if (create) {
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err = OS_Mkdir(rspec);
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if (err)
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return err;
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// Windows version has a call to SetFileAttributes here
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} else {
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return err;
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}
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err = OS_MakeSpec2(dbuffer, "resource.frk", rspec);
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if (err)
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return err;
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} else if (OS_IsFile(rspec)) {
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return ENOTDIR;
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}
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err = OS_MakeNameSpec(OS_NameSpecToString(&spec->name, STSbuf, sizeof(STSbuf)), &rspec->name);
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if (err)
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return err;
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return 0;
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}
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