added change name and skin functions

4 files changed, 120 insertions, 1 deletions

diff --git a/src/commands.c b/src/commands.c
new file mode 100644
index 0000000..f83909e
--- /dev/null
+++ b/src/commands.c
@@ -0,0 +1,102 @@
+#include "../inc/demo.h"
+#include "../inc/pack.h"
+
+#include <string.h>
+
+// TODO set by id and name has much repeating, fix that
+int setnamebyid(int id, char *new, demo *demo)
+{
+    int newlen = strlen(new);
+    if (newlen >= 15)
+        return -1;
+    
+    int intname[4] = {0x80808080, 0x80808080, 0x80808080, 0x80808000};
+    strtoint(new, newlen + 1, intname);
+    int found = 0;
+
+    for (int i = 0; i < demo->data.numchunks; i++)
+    {
+        if (demo->data.chunks[i].type != DEMOSNAP)
+            continue;
+        demosnap *snap = demo->data.chunks[i].data.snap;
+
+        for (int y = 0; y < snap->numitems; y++)
+        {
+            demosnapitem *item = &snap->items[y];
+            if (item->type == 11 && item->id == id)
+            {
+                memcpy(item->data, intname, 4 * sizeof(int));
+                found++;
+            }
+        }
+    }
+    return found;
+}
+
+int setnamebyname(char *old, char *new, demo *demo)
+{
+    int newlen = strlen(new);
+    if (newlen >= 15)
+        return -1;
+    
+    int intname[4] = {0x80808080, 0x80808080, 0x80808080, 0x80808000};
+    strtoint(new, newlen + 1, intname);
+    char found = 0;
+
+    for (int i = 0; i < demo->data.numchunks; i++)
+    {
+        if (demo->data.chunks[i].type != DEMOSNAP)
+            continue;
+        demosnap *snap = demo->data.chunks[i].data.snap;
+
+        for (int y = 0; y < snap->numitems; y++)
+        {
+            demosnapitem *item = &snap->items[y];
+            if (item->type != 11)
+                continue;
+            
+            char name[16];
+            intstostr(item->data, 4, name);
+            if (strcmp(old, name) == 0)
+            {
+                memcpy(item->data, intname, 4 * sizeof(int));
+                found++;
+            }
+        }
+    }
+    return found;
+}
+
+int setskinbyname(char *name, char *skin, demo *demo)
+{
+    int skinlen = strlen(skin);
+    if (skinlen >= 23)
+        return -1;
+    
+    int intskin[5] = {0x80808080, 0x80808080, 0x80808080, 0x80808080, 0x80808000};
+    strtoint(skin, skinlen + 1, intskin);
+    char found = 0;
+
+    for (int i = 0; i < demo->data.numchunks; i++)
+    {
+        if (demo->data.chunks[i].type != DEMOSNAP)
+            continue;
+        demosnap *snap = demo->data.chunks[i].data.snap;
+
+        for (int y = 0; y < snap->numitems; y++)
+        {
+            demosnapitem *item = &snap->items[y];
+            if (item->type != 11)
+                continue;
+            
+            char iname[16];
+            intstostr(item->data, 4, iname);
+            if (strcmp(name, iname) == 0)
+            {
+                memcpy(&item->data[8], intskin, 5 * sizeof(int));
+                found++;
+            }
+        }
+    }
+    return found;
+}
diff --git a/src/demo.c b/src/demo.c
index d73b1a7..f5c346e 100644
--- a/src/demo.c
+++ b/src/demo.c
@@ -18,6 +18,8 @@ const char headermagic[7] = "TWDEMO\0";
 const unsigned char mapmagic[] = {0x6b, 0xe6, 0xda, 0x4a, 0xce, 0xbd, 0x38, 0x0c,
                                   0x9b, 0x5b, 0x12, 0x89, 0xc8, 0x42, 0xd7, 0x80};
 
+/* readers */
+
 int readdemoheader(FILE *fp, demoheader *dh)
 {
     char magicbuff[sizeof(headermagic)];
@@ -300,6 +302,8 @@ int readdemo(FILE *fp, demo *demo)
     return 1;
 }
 
+/* writers */
+
 int writedemoheader(FILE *fp, demoheader *dh)
 {
     unsigned char intbuff[4];
diff --git a/src/main.c b/src/main.c
index e3f0fcf..9c31a57 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,5 +1,6 @@
 #include "../inc/demo.h"
 #include "../inc/huffman.h"
+#include "../inc/commands.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -119,7 +120,18 @@ int main()
     demo d;
 
     readdemo(fp, &d);
-    printdemo(&d, 0);
+    
+    // printdemo(&d, 1);
+
+    int retid = setnamebyid(1, "NamedByID", &d);
+    int retname = setnamebyname("New Hero", "NamedByName", &d);
+    
+    //TODO quirk, when doing further edits keep previous ones in mind
+    int retskin = setskinbyname("NamedByName", "bomb", &d);
+
+    printf("id: %d name: %d\n", retid, retname);
+    printf("skin: %d\n", retskin);
+
     writedemo(op, &d);
 
     fclose(fp);
diff --git a/src/pack.c b/src/pack.c
index 9e1d4fe..c446f56 100644
--- a/src/pack.c
+++ b/src/pack.c
@@ -119,6 +119,7 @@ void intstostr(const int *ints, int num, char *str)
         ints++;
         num--;
     }
+    str[-1] = 0;
 }
 
 void strtoint(const char *str, int num, int *ints)