Start decompiling easy_chat

2 files changed, 266 insertions, 3 deletions

diff --git a/src/dewford_trend.c b/src/dewford_trend.c
index 55314b1c6..b90100d90 100644
--- a/src/dewford_trend.c
+++ b/src/dewford_trend.c
@@ -1,6 +1,7 @@
 #include "global.h"
 #include "dewford_trend.h"
 #include "asm.h"
+#include "easy_chat.h"
 #include "event_data.h"
 #include "link.h"
 #include "rng.h"
@@ -24,12 +25,12 @@ void sub_80FA17C(void)
 
     for (i = 0; i < 5; i++)
     {
-        gSaveBlock1.easyChatPairs[i].words[0] = sub_80EB72C(10);
+        gSaveBlock1.easyChatPairs[i].words[0] = sub_80EB72C(EC_GROUP_CONDITIONS);
 
         if (Random() & 1)
-            gSaveBlock1.easyChatPairs[i].words[1] = sub_80EB72C(12);
+            gSaveBlock1.easyChatPairs[i].words[1] = sub_80EB72C(EC_GROUP_LIFESTYLE);
         else
-            gSaveBlock1.easyChatPairs[i].words[1] = sub_80EB72C(13);
+            gSaveBlock1.easyChatPairs[i].words[1] = sub_80EB72C(EC_GROUP_HOBBIES);
 
         gSaveBlock1.easyChatPairs[i].unk1_6 = Random() & 1;
         sub_80FA740(&gSaveBlock1.easyChatPairs[i]);
diff --git a/src/easy_chat.c b/src/easy_chat.c
new file mode 100644
index 000000000..380fe6e4d
--- /dev/null
+++ b/src/easy_chat.c
@@ -0,0 +1,262 @@
+#include "global.h"
+#include "easy_chat.h"
+#include "asm.h"
+#include "event_data.h"
+#include "field_message_box.h"
+#include "pokedex.h"
+#include "rng.h"
+#include "text.h"
+
+u8 sub_80EB8C0(void);
+u8 sub_80EB868(u8);
+u16 sub_80EAE88(u8);
+void sub_80EB890(u8);
+u16 sub_80EB784(u16 group);
+u8 sub_80EAD7C(u8 group);
+u8 sub_80EB680(u16 *, u16, u16, u16);
+static u16 sub_80EB9D8(void);
+static u16 sub_80EB960(void);
+u16 sub_80EB72C(u16);
+
+extern void *gEasyChatGroupWords[];
+extern const u8 gEasyChatGroupSizes[];
+
+extern u16 gSpecialVar_0x8004;
+
+u16 sub_80EB72C(u16 group) {
+    u16 local1;
+
+    local1 = Random() % gEasyChatGroupSizes[group];
+
+    if (group == EC_GROUP_POKEMON ||
+        group == EC_GROUP_POKEMON_2 ||
+        group == EC_GROUP_MOVE_1 ||
+        group == EC_GROUP_MOVE_2)
+    {
+        local1 = ((u16 *) gEasyChatGroupWords[group])[local1];
+    }
+
+
+    return ((group & 0x7F) << 9) | (local1 & 0x1FF);
+}
+
+u16 sub_80EB784(u16 group) {
+    if (!sub_80EAD7C(group))
+    {
+        return -1;
+    }
+
+    if (group != EC_GROUP_POKEMON)
+    {
+        if (group == EC_GROUP_TRENDY_SAYING)
+        {
+            return sub_80EB960();
+        }
+    }
+    else
+    {
+        return sub_80EB9D8();
+    }
+
+    return sub_80EB72C(group);
+}
+
+void sub_80EB7C4(void) {
+    u16 *words;
+    u16 arg1, arg2;
+
+
+    switch (gSpecialVar_0x8004)
+    {
+    case 0:
+        words = gSaveBlock1.unk2B1C;
+        arg1 = 2;
+        arg2 = 2;
+        break;
+
+    case 1:
+        words = gSaveBlock1.unk2B28;
+        if (sub_80EB680(gSaveBlock1.unk2B28, 3, 2, 20))
+        {
+            arg1 = 2;
+            arg2 = 3;
+        }
+        else
+        {
+            arg1 = 3;
+            arg2 = 2;
+        }
+        break;
+
+    case 2:
+        words = gSaveBlock1.unk2B34;
+        arg1 = 3;
+        arg2 = 2;
+        break;
+
+    case 3:
+        words = gSaveBlock1.unk2B40;
+        arg1 = 3;
+        arg2 = 2;
+        break;
+
+    default:
+        return;
+    }
+
+    ConvertEasyChatWordsToString(gStringVar4, words, arg1, arg2);
+    ShowFieldAutoScrollMessage(gStringVar4);
+}
+
+void sub_80EB83C(void) {
+    u16 group, local2;
+
+    if (Random() & 1)
+    {
+        group = EC_GROUP_HOBBIES;
+    }
+    else
+    {
+        group = EC_GROUP_LIFESTYLE;
+    }
+
+    local2 = sub_80EB784(group);
+    sub_80EB3FC(gStringVar2, local2);
+}
+
+u8 sub_80EB868(u8 arg0) {
+    int offset;
+    int index;
+
+    index = arg0 / 8;
+    offset = arg0 & 7;
+    return (gSaveBlock1.unk2D8C[index] >> offset) & 1;
+}
+
+void sub_80EB890(u8 arg0) {
+    int offset;
+    int index;
+
+    if (arg0 > 32)
+    {
+        return;
+    }
+
+    index = arg0 / 8;
+    offset = arg0 & 7;
+    gSaveBlock1.unk2D8C[index] |= 1 << offset;
+}
+
+u8 sub_80EB8C0(void) {
+    u8 i, retval;
+
+    i = 0;
+    retval = 0;
+    for (; i < 33; i++)
+    {
+        if (sub_80EB868(i))
+        {
+            retval += 1;
+        }
+    }
+
+    return retval;
+}
+
+u16 sub_80EB8EC(void) {
+    u16 i;
+    u16 local1, local2;
+
+    local1 = sub_80EB8C0();
+    if (local1 == 33)
+    {
+        return -1;
+    }
+
+    local2 = Random() % (33 - local1);
+
+    for (i = 0; i <= 0x20; i++)
+    {
+        if (sub_80EB868(i) == 0)
+        {
+            if (local2 == 0)
+            {
+                sub_80EB890(i);
+                return (i & 0x1FF) | 0x2800;
+            }
+
+            local2--;
+        }
+    }
+
+    return -1;
+}
+
+static u16 sub_80EB960(void) {
+    u16 i;
+    u16 local1;
+
+    local1 = sub_80EB8C0();
+    if (local1 == 0)
+    {
+        return -1;
+    }
+
+    local1 = Random() % local1;
+
+    for (i = 0; i <= 0x20; i++)
+    {
+        if (sub_80EB868(i))
+        {
+            if (local1 == 0)
+            {
+                return (i & 0x1FF) | 0x2800;
+            }
+
+            local1--;
+        }
+    }
+
+    return -1;
+}
+
+u8 sub_80EB9C8(void) {
+    return IsNationalPokedexEnabled();
+}
+
+static u16 sub_80EB9D8(void) {
+    u16 *speciesList;
+    u16 local1;
+    u16 i;
+
+    local1 = sub_80EAE88(0);
+
+    if (local1 == 0)
+    {
+        return -1;
+    }
+
+    local1 = Random() % local1;
+    speciesList = (u16 *) gEasyChatGroupWords[EC_GROUP_POKEMON];
+
+    for (i = 0; i < gEasyChatGroupSizes[EC_GROUP_POKEMON]; i++)
+    {
+        const u16 dexNum = SpeciesToNationalPokedexNum(*speciesList);
+
+        const u8 local2 = sub_8090D90(dexNum, 0);
+
+        if (local2)
+        {
+            if (local1 == 0)
+            {
+                return *speciesList & 0x1FF;
+            }
+
+            local1--;
+        }
+
+        speciesList++;
+    }
+
+    return -1;
+}