Add a check that we don't have any unused functions.

This check puts all of our code in a C++ anonymous namespace, which is
effectively making all functions `static`. This allows the compiler to
determine that a function is unused, so we can delete it.

14 files changed, 28 insertions, 123 deletions

diff --git a/other/analysis/gen-file.sh b/other/analysis/gen-file.sh
index 019bd8f9..ad8df3b8 100644
--- a/other/analysis/gen-file.sh
+++ b/other/analysis/gen-file.sh
@@ -17,20 +17,20 @@ put() {
   if [ "$SKIP_LINES" = "" ]; then
     echo "#line 1 \"$1\"" >> amalgamation.cc
   fi
-  cat $1 >> amalgamation.cc
+  cat "$1" >> amalgamation.cc
 }
 
 putmain() {
-  echo "namespace $(echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g') {" >> amalgamation.cc
+  echo "namespace $(echo "$1" | sed -e 's/[^a-zA-Z0-9_]/_/g') {" >> amalgamation.cc
   if [ "$SKIP_LINES" = "" ]; then
     echo "#line 1 \"$1\"" >> amalgamation.cc
   fi
-  sed -e 's/^int main(/static &/' $1 >> amalgamation.cc
-  echo "} //  namespace $(echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g')" >> amalgamation.cc
+  sed -e 's/^int main(/static &/' "$1" >> amalgamation.cc
+  echo "} //  namespace $(echo "$1" | sed -e 's/[^a-zA-Z0-9_]/_/g')" >> amalgamation.cc
 }
 
 callmain() {
-  echo "  call($(echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g')::main, argc, argv);" >> amalgamation.cc
+  echo "  call($(echo "$1" | sed -e 's/[^a-zA-Z0-9_]/_/g')::main, argc, argv);" >> amalgamation.cc
 }
 
 :> amalgamation.cc
@@ -53,25 +53,32 @@ FIND_QUERY="$FIND_QUERY -and -not -name av_test.c"
 FIND_QUERY="$FIND_QUERY -and -not -name dht_test.c"
 FIND_QUERY="$FIND_QUERY -and -not -name version_test.c"
 
-for i in $(eval $FIND_QUERY); do
-  if ! grep -q '^int main(' $i; then
-    put $i
+(for i in $(eval "$FIND_QUERY"); do
+  grep -o '#include <[^>]*>' "$i" \
+    | grep -E -v '<win|<ws|<iphlp|<libc|<mach/|<crypto_|<randombytes|<u.h>|<sys/filio|<linux'
+done) | sort -u >> amalgamation.cc
+
+echo 'namespace {' >> amalgamation.cc
+for i in $(eval "$FIND_QUERY"); do
+  if ! grep -q '^int main(' "$i"; then
+    put "$i"
   fi
 done
 
-for i in $(eval $FIND_QUERY); do
-  if grep -q '^int main(' $i; then
-    putmain $i
+for i in $(eval "$FIND_QUERY"); do
+  if grep -q '^int main(' "$i"; then
+    putmain "$i"
   fi
 done
 
 echo "static void call(int m(), int argc, char **argv) { m(); }" >> amalgamation.cc
 echo "static void call(int m(int, char **), int argc, char **argv) { m(argc, argv); }" >> amalgamation.cc
+echo '}  // namespace' >> amalgamation.cc
 
 echo "int main(int argc, char **argv) {" >> amalgamation.cc
-for i in $(eval $FIND_QUERY); do
-  if grep -q '^int main(' $i; then
-    callmain $i
+for i in $(eval "$FIND_QUERY"); do
+  if grep -q '^int main(' "$i"; then
+    callmain "$i"
   fi
 done
 echo "  return 0;" >> amalgamation.cc
diff --git a/other/bootstrap_daemon/docker/tox-bootstrapd.sha256 b/other/bootstrap_daemon/docker/tox-bootstrapd.sha256
index 5287541b..4d02d38f 100644
--- a/other/bootstrap_daemon/docker/tox-bootstrapd.sha256
+++ b/other/bootstrap_daemon/docker/tox-bootstrapd.sha256
@@ -1 +1 @@
-e7b6d31485b5e1561659be08f3e3ef003cef186042d7e0fe2ef48cf341932b5a  /usr/local/bin/tox-bootstrapd
+89df21d6a19a1b6652db5b7e6e9f65ad5f8be8abdca9f58645548b9e0c9383e3  /usr/local/bin/tox-bootstrapd
diff --git a/other/cpufeatures.c b/other/cpufeatures.c
index 3da06e58..38c97059 100644
--- a/other/cpufeatures.c
+++ b/other/cpufeatures.c
@@ -3,4 +3,4 @@
 #include ANDROID_CPU_FEATURES
 #endif
 
-extern int unused_declaration;
+typedef int unused_declaration;
diff --git a/testing/DHT_test.c b/testing/DHT_test.c
index 8ba61ec2..5f28eb99 100644
--- a/testing/DHT_test.c
+++ b/testing/DHT_test.c
@@ -17,6 +17,7 @@
 #define _XOPEN_SOURCE 600
 #endif
 
+#include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/toxcore/LAN_discovery.api.h b/toxcore/LAN_discovery.api.h
index 5c25b67b..ad3d60ed 100644
--- a/toxcore/LAN_discovery.api.h
+++ b/toxcore/LAN_discovery.api.h
@@ -21,7 +21,7 @@ namespace lan_discovery {
 /**
  * Interval in seconds between LAN discovery packet sending.
  */
-const INTERVAL = 10;
+#define LAN_DISCOVERY_INTERVAL         10
 
 /**
  * Send a LAN discovery pcaket to the broadcast address with port port.
diff --git a/toxcore/LAN_discovery.h b/toxcore/LAN_discovery.h
index 7e049b99..6b55e319 100644
--- a/toxcore/LAN_discovery.h
+++ b/toxcore/LAN_discovery.h
@@ -26,8 +26,6 @@ typedef struct IP IP;
  */
 #define LAN_DISCOVERY_INTERVAL         10
 
-uint32_t lan_discovery_interval(void);
-
 /**
  * Send a LAN discovery pcaket to the broadcast address with port port.
  */
diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index 82c31147..556acc27 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -1450,38 +1450,6 @@ int file_data(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uin
     return -6;
 }
 
-/* Give the number of bytes left to be sent/received.
- *
- *  send_receive is 0 if we want the sending files, 1 if we want the receiving.
- *
- *  return number of bytes remaining to be sent/received on success
- *  return 0 on failure
- */
-uint64_t file_dataremaining(const Messenger *m, int32_t friendnumber, uint8_t filenumber, uint8_t send_receive)
-{
-    if (!friend_is_valid(m, friendnumber)) {
-        return 0;
-    }
-
-    const struct File_Transfers *const sending = &m->friendlist[friendnumber].file_sending[filenumber];
-
-    if (send_receive == 0) {
-        if (sending->status == FILESTATUS_NONE) {
-            return 0;
-        }
-
-        return sending->size - sending->transferred;
-    }
-
-    const struct File_Transfers *const receiving = &m->friendlist[friendnumber].file_receiving[filenumber];
-
-    if (receiving->status == FILESTATUS_NONE) {
-        return 0;
-    }
-
-    return receiving->size - receiving->transferred;
-}
-
 /**
  * Iterate over all file transfers and request chunks (from the client) for each
  * of them.
diff --git a/toxcore/Messenger.h b/toxcore/Messenger.h
index 74c19e09..31526b63 100644
--- a/toxcore/Messenger.h
+++ b/toxcore/Messenger.h
@@ -651,15 +651,6 @@ int file_seek(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uin
 int file_data(const Messenger *m, int32_t friendnumber, uint32_t filenumber, uint64_t position, const uint8_t *data,
               uint16_t length);
 
-/* Give the number of bytes left to be sent/received.
- *
- *  send_receive is 0 if we want the sending files, 1 if we want the receiving.
- *
- *  return number of bytes remaining to be sent/received on success
- *  return 0 on failure
- */
-uint64_t file_dataremaining(const Messenger *m, int32_t friendnumber, uint8_t filenumber, uint8_t send_receive);
-
 /** A/V related */
 
 /* Set the callback for msi packets.
diff --git a/toxcore/crypto_core.c b/toxcore/crypto_core.c
index 403e0872..2fa4750f 100644
--- a/toxcore/crypto_core.c
+++ b/toxcore/crypto_core.c
@@ -12,11 +12,12 @@
 #include "config.h"
 #endif
 
+#include "crypto_core.h"
+
 #include <stdlib.h>
 #include <string.h>
 
 #include "ccompat.h"
-#include "crypto_core.h"
 
 #ifndef VANILLA_NACL
 /* We use libsodium by default. */
diff --git a/toxcore/group.c b/toxcore/group.c
index 3e04f181..a946e7b8 100644
--- a/toxcore/group.c
+++ b/toxcore/group.c
@@ -1301,36 +1301,6 @@ int group_set_max_frozen(const Group_Chats *g_c, uint32_t groupnumber, uint32_t
     return 0;
 }
 
-/* List all the (frozen, if frozen is true) peers in the group chat.
- *
- * Copies the names of the peers to the `name[length][MAX_NAME_LENGTH]` array.
- *
- * Copies the lengths of the names to `lengths[length]`
- *
- * returns the number of peers on success.
- *
- * return -1 on failure.
- */
-int group_names(const Group_Chats *g_c, uint32_t groupnumber, uint8_t names[][MAX_NAME_LENGTH], uint16_t lengths[],
-                uint16_t length, bool frozen)
-{
-    const Group_c *g = get_group_c(g_c, groupnumber);
-
-    if (!g) {
-        return -1;
-    }
-
-    const uint32_t num = frozen ? g->numfrozen : g->numpeers;
-
-    unsigned int i;
-
-    for (i = 0; i < num && i < length; ++i) {
-        lengths[i] = group_peername(g_c, groupnumber, i, names[i], frozen);
-    }
-
-    return i;
-}
-
 /* Return the number of (frozen, if frozen is true) peers in the group chat on
  * success.
  * return -1 if groupnumber is invalid.
diff --git a/toxcore/group.h b/toxcore/group.h
index 1e054de3..eb8db55f 100644
--- a/toxcore/group.h
+++ b/toxcore/group.h
@@ -355,19 +355,6 @@ int group_number_peers(const Group_Chats *g_c, uint32_t groupnumber, bool frozen
  */
 int group_peernumber_is_ours(const Group_Chats *g_c, uint32_t groupnumber, uint32_t peernumber);
 
-/* List all the (frozen, if frozen is true) peers in the group chat.
- *
- * Copies the names of the peers to the `name[length][MAX_NAME_LENGTH]` array.
- *
- * Copies the lengths of the names to `lengths[length]`
- *
- * returns the number of peers on success.
- *
- * return -1 on failure.
- */
-int group_names(const Group_Chats *g_c, uint32_t groupnumber, uint8_t names[][MAX_NAME_LENGTH], uint16_t lengths[],
-                uint16_t length, bool frozen);
-
 /* Set handlers for custom lossy packets. */
 void group_lossy_packet_registerhandler(Group_Chats *g_c, uint8_t byte, lossy_packet_cb *function);
 
diff --git a/toxcore/list.c b/toxcore/list.c
index cb3c71cc..fca8cea8 100644
--- a/toxcore/list.c
+++ b/toxcore/list.c
@@ -248,13 +248,3 @@ int bs_list_remove(BS_List *list, const uint8_t *data, int id)
 
     return 1;
 }
-
-int bs_list_trim(BS_List *list)
-{
-    if (!resize(list, list->n)) {
-        return 0;
-    }
-
-    list->capacity = list->n;
-    return 1;
-}
diff --git a/toxcore/list.h b/toxcore/list.h
index 9d65b53f..afe4240b 100644
--- a/toxcore/list.h
+++ b/toxcore/list.h
@@ -57,12 +57,4 @@ int bs_list_add(BS_List *list, const uint8_t *data, int id);
  */
 int bs_list_remove(BS_List *list, const uint8_t *data, int id);
 
-/* Removes the memory overhead
- *
- * return value:
- *  1 : success
- *  0 : failure
- */
-int bs_list_trim(BS_List *list);
-
 #endif
diff --git a/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/sse/pwhash_scryptsalsa208sha256_sse.c b/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/sse/pwhash_scryptsalsa208sha256_sse.c
index 7f015238..38a536a6 100644
--- a/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/sse/pwhash_scryptsalsa208sha256_sse.c
+++ b/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/sse/pwhash_scryptsalsa208sha256_sse.c
@@ -398,4 +398,4 @@ escrypt_kdf_sse(escrypt_local_t * local,
 #endif
 
 /* ISO C requires a translation unit to contain at least one declaration */
-extern int non_empty_tu_decl;
+typedef int non_empty_tu_decl;