Prism can now revert current changes

1 files changed, 50 insertions, 4 deletions

diff --git a/db.c b/db.c
index 121bc8b..fb05330 100644
--- a/db.c
+++ b/db.c
@@ -208,8 +208,6 @@ int res;
         reader = strchr(reader, ' ') + 1; /* Advance to hash */

         reader = strchr(reader, ' ') + 1; /* Advance to filename */

         

-        printf("%s <=> %s\n", filename, reader);

-        

 #if defined(MSDOS) || defined(WIN32)        

         res = strcmpi(filename, reader);

 #else   

@@ -224,8 +222,6 @@ int res;
             memset(info->hash, 0, 33);

             memcpy(info->hash, reader, 32);

             

-            printf("%s\n", info->hash);

-            

             break;

         }

     }

@@ -417,3 +413,53 @@ char newhash[33];
     

     return PRET_OK;

 }

+

+static int determine_revision(struct db_file *info, int desired_revision)

+{

+char *fname;

+int fnamelength;

+struct stat fileres;

+int res, i;

+    

+    if(desired_revision > info->revision)

+        return info->revision;

+    

+    fnamelength = strlen(PDB_DIR) + strlen(DIR_SEP) + 32;

+    fname = (char *)malloc(fnamelength*sizeof(char));

+    if(fname == NULL)

+        return PRET_ERROR;

+    

+    i = desired_revision+1;

+    do {

+        i--;

+        snprintf(fname, fnamelength, "%s%s%x.%x", PDB_DIR, DIR_SEP, info->id, i);

+        res = stat(fname, &fileres);

+    } while(res != 0 && i > 0);

+    

+    if(res == 0)

+        return i;

+        

+    return PRET_NOTTRACKED;

+}

+

+int revert(const char *filename, int revision)

+{

+int target_revision;

+struct db_file info;

+int res;

+

+

+    res = get_db_fileinfo(filename, &info);

+    if(res != PRET_OK) 

+        return res;

+        

+    if(revision < 0)

+        target_revision = info.revision;

+    else {

+        target_revision = determine_revision(&info, revision);

+        if(target_revision < 0)

+            return PRET_NOREVISION;

+    }

+    

+    return decompress_file(filename, info.id, target_revision);

+}