refactor(tm2): remove pkg/maths in favour of min/max (gnolang#1746)

I was taking a look at what packages we have in tm2/pkg and realised we
had an entire package to do what are, since go 1.21, builtin functions.

This PR removes tm2/pkg/maths in favour of the now standard and generic
go implementation of the same functionality.

tm2/pkg/bft/mempool/clist_mempool.go

@@ -18,7 +18,6 @@ import (
 	"github.com/gnolang/gno/tm2/pkg/clist"
 	"github.com/gnolang/gno/tm2/pkg/errors"
 	"github.com/gnolang/gno/tm2/pkg/log"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 	osm "github.com/gnolang/gno/tm2/pkg/os"
 )
 
@@ -461,7 +460,7 @@ func (mem *CListMempool) ReapMaxBytesMaxGas(maxDataBytes, maxGas int64) types.Tx
 	var totalGas int64
 	// TODO: we will get a performance boost if we have a good estimate of avg
 	// size per tx, and set the initial capacity based off of that.
-	// txs := make([]types.Tx, 0, maths.MinInt(mem.txs.Len(), max/mem.avgTxSize))
+	// txs := make([]types.Tx, 0, min(mem.txs.Len(), max/mem.avgTxSize))
 	txs := make([]types.Tx, 0, mem.txs.Len())
 	for e := mem.txs.Front(); e != nil; e = e.Next() {
 		memTx := e.Value.(*mempoolTx)
@@ -497,7 +496,7 @@ func (mem *CListMempool) ReapMaxTxs(max int) types.Txs {
 		time.Sleep(time.Millisecond * 10)
 	}
 
-	txs := make([]types.Tx, 0, maths.MinInt(mem.txs.Len(), max))
+	txs := make([]types.Tx, 0, min(mem.txs.Len(), max))
 	for e := mem.txs.Front(); e != nil && len(txs) <= max; e = e.Next() {
 		memTx := e.Value.(*mempoolTx)
 		txs = append(txs, memTx.tx)

tm2/pkg/bft/rpc/client/rpc_test.go

@@ -14,7 +14,6 @@ import (
 	rpcclient "github.com/gnolang/gno/tm2/pkg/bft/rpc/lib/client"
 	rpctest "github.com/gnolang/gno/tm2/pkg/bft/rpc/test"
 	"github.com/gnolang/gno/tm2/pkg/bft/types"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 )
 
 func getHTTPClient() *client.HTTP {
@@ -519,7 +518,7 @@ func testBatchedJSONRPCCalls(t *testing.T, c *client.HTTP) {
 	bresult2, ok := bresults[1].(*ctypes.ResultBroadcastTxCommit)
 	require.True(t, ok)
 	require.Equal(t, *bresult2, *r2)
-	apph := maths.MaxInt64(bresult1.Height, bresult2.Height) + 1
+	apph := max(bresult1.Height, bresult2.Height) + 1
 
 	client.WaitForHeight(c, apph, nil)
 

tm2/pkg/bft/rpc/core/blocks.go

@@ -7,7 +7,6 @@ import (
 	rpctypes "github.com/gnolang/gno/tm2/pkg/bft/rpc/lib/types"
 	sm "github.com/gnolang/gno/tm2/pkg/bft/state"
 	"github.com/gnolang/gno/tm2/pkg/bft/types"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 )
 
 // Get block headers for minHeight <= height <= maxHeight.
@@ -95,35 +94,35 @@ func BlockchainInfo(ctx *rpctypes.Context, minHeight, maxHeight int64) (*ctypes.
 	}, nil
 }
 
-// error if either min or max are negative or min < max
-// if 0, use 1 for min, latest block height for max
-// enforce limit.
-// error if min > max
-func filterMinMax(height, min, max, limit int64) (int64, int64, error) {
+// error if either low or high are negative or low > high
+// if low is 0 it defaults to 1, if high is 0 it defaults to height (block height).
+// limit sets the maximum amounts of values included within [low,high] (inclusive),
+// increasing low as necessary.
+func filterMinMax(height, low, high, limit int64) (int64, int64, error) {
 	// filter negatives
-	if min < 0 || max < 0 {
-		return min, max, fmt.Errorf("heights must be non-negative")
+	if low < 0 || high < 0 {
+		return low, high, fmt.Errorf("heights must be non-negative")
 	}
 
 	// adjust for default values
-	if min == 0 {
-		min = 1
+	if low == 0 {
+		low = 1
 	}
-	if max == 0 {
-		max = height
+	if high == 0 {
+		high = height
 	}
 
-	// limit max to the height
-	max = maths.MinInt64(height, max)
+	// limit high to the height
+	high = min(height, high)
 
-	// limit min to within `limit` of max
+	// limit low to within `limit` of max
 	// so the total number of blocks returned will be `limit`
-	min = maths.MaxInt64(min, max-limit+1)
+	low = max(low, high-limit+1)
 
-	if min > max {
-		return min, max, fmt.Errorf("min height %d can't be greater than max height %d", min, max)
+	if low > high {
+		return low, high, fmt.Errorf("min height %d can't be greater than max height %d", low, high)
 	}
-	return min, max, nil
+	return low, high, nil
 }
 
 // Get block at a given height.

tm2/pkg/bft/state/store.go

@@ -7,7 +7,6 @@ import (
 	abci "github.com/gnolang/gno/tm2/pkg/bft/abci/types"
 	"github.com/gnolang/gno/tm2/pkg/bft/types"
 	dbm "github.com/gnolang/gno/tm2/pkg/db"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 	osm "github.com/gnolang/gno/tm2/pkg/os"
 )
 
@@ -221,7 +220,7 @@ func LoadValidators(db dbm.DB, height int64) (*types.ValidatorSet, error) {
 
 func lastStoredHeightFor(height, lastHeightChanged int64) int64 {
 	checkpointHeight := height - height%valSetCheckpointInterval
-	return maths.MaxInt64(checkpointHeight, lastHeightChanged)
+	return max(checkpointHeight, lastHeightChanged)
 }
 
 // CONTRACT: Returned ValidatorsInfo can be mutated.

tm2/pkg/bft/types/block.go

@@ -14,7 +14,6 @@ import (
 	"github.com/gnolang/gno/tm2/pkg/crypto/merkle"
 	"github.com/gnolang/gno/tm2/pkg/crypto/tmhash"
 	"github.com/gnolang/gno/tm2/pkg/errors"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 )
 
 // Block defines the atomic unit of a Tendermint blockchain.
@@ -718,7 +717,7 @@ func (data *Data) StringIndented(indent string) string {
 	if data == nil {
 		return "nil-Data"
 	}
-	txStrings := make([]string, maths.MinInt(len(data.Txs), 21))
+	txStrings := make([]string, min(len(data.Txs), 21))
 	for i, tx := range data.Txs {
 		if i == 20 {
 			txStrings[i] = fmt.Sprintf("... (%v total)", len(data.Txs))

tm2/pkg/bft/types/part_set.go

@@ -10,7 +10,6 @@ import (
 	"github.com/gnolang/gno/tm2/pkg/bitarray"
 	"github.com/gnolang/gno/tm2/pkg/crypto/merkle"
 	"github.com/gnolang/gno/tm2/pkg/errors"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 )
 
 var (
@@ -107,7 +106,7 @@ func NewPartSetFromData(data []byte, partSize int) *PartSet {
 	for i := 0; i < total; i++ {
 		part := &Part{
 			Index: i,
-			Bytes: data[i*partSize : maths.MinInt(len(data), (i+1)*partSize)],
+			Bytes: data[i*partSize : min(len(data), (i+1)*partSize)],
 		}
 		parts[i] = part
 		partsBytes[i] = part.Bytes

tm2/pkg/bft/types/signable.go

@@ -2,13 +2,12 @@ package types
 
 import (
 	"github.com/gnolang/gno/tm2/pkg/crypto/ed25519"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 )
 
 // MaxSignatureSize is a maximum allowed signature size for the Proposal
 // and Vote.
 // XXX: secp256k1 does not have Size nor MaxSize defined.
-var MaxSignatureSize = maths.MaxInt(ed25519.SignatureSize, 64)
+const MaxSignatureSize = max(ed25519.SignatureSize, 64)
 
 // Signable is an interface for all signable things.
 // It typically removes signatures before serializing.

tm2/pkg/bft/types/validator_set_test.go

@@ -15,7 +15,6 @@ import (
 	tmtime "github.com/gnolang/gno/tm2/pkg/bft/types/time"
 	"github.com/gnolang/gno/tm2/pkg/crypto"
 	"github.com/gnolang/gno/tm2/pkg/crypto/mock"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 	"github.com/gnolang/gno/tm2/pkg/random"
 )
 
@@ -1052,7 +1051,7 @@ func TestValSetUpdatesOrderIndependenceTestsExecute(t *testing.T) {
 
 		// perform at most 20 permutations on the updates and call UpdateWithChangeSet()
 		n := len(tt.updateVals)
-		maxNumPerms := maths.MinInt(20, n*n)
+		maxNumPerms := min(20, n*n)
 		for j := 0; j < maxNumPerms; j++ {
 			// create a copy of original set and apply a random permutation of updates
 			valSetCopy := valSet.Copy()

tm2/pkg/bitarray/bit_array.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/gnolang/gno/tm2/pkg/maths"
 	"github.com/gnolang/gno/tm2/pkg/random"
 )
 
@@ -122,8 +121,8 @@ func (bA *BitArray) Or(o *BitArray) *BitArray {
 	}
 	bA.mtx.Lock()
 	o.mtx.Lock()
-	c := bA.copyBits(maths.MaxInt(bA.Bits, o.Bits))
-	smaller := maths.MinInt(len(bA.Elems), len(o.Elems))
+	c := bA.copyBits(max(bA.Bits, o.Bits))
+	smaller := min(len(bA.Elems), len(o.Elems))
 	for i := 0; i < smaller; i++ {
 		c.Elems[i] |= o.Elems[i]
 	}
@@ -149,7 +148,7 @@ func (bA *BitArray) And(o *BitArray) *BitArray {
 }
 
 func (bA *BitArray) and(o *BitArray) *BitArray {
-	c := bA.copyBits(maths.MinInt(bA.Bits, o.Bits))
+	c := bA.copyBits(min(bA.Bits, o.Bits))
 	for i := 0; i < len(c.Elems); i++ {
 		c.Elems[i] &= o.Elems[i]
 	}
@@ -191,7 +190,7 @@ func (bA *BitArray) Sub(o *BitArray) *BitArray {
 	// If o is longer, those bits are ignored.
 	// If bA is longer, then skipping those iterations is equivalent
 	// to right padding with 0's
-	smaller := maths.MinInt(len(bA.Elems), len(o.Elems))
+	smaller := min(len(bA.Elems), len(o.Elems))
 	for i := 0; i < smaller; i++ {
 		// &^ is and not in golang
 		c.Elems[i] &^= o.Elems[i]

tm2/pkg/p2p/conn/connection.go

@@ -17,7 +17,6 @@ import (
 	"github.com/gnolang/gno/tm2/pkg/amino"
 	"github.com/gnolang/gno/tm2/pkg/errors"
 	"github.com/gnolang/gno/tm2/pkg/flow"
-	"github.com/gnolang/gno/tm2/pkg/maths"
 	"github.com/gnolang/gno/tm2/pkg/service"
 	"github.com/gnolang/gno/tm2/pkg/timer"
 )
@@ -550,7 +549,7 @@ FOR_LOOP:
 		// Peek into bufConnReader for debugging
 		/*
 			if numBytes := c.bufConnReader.Buffered(); numBytes > 0 {
-				bz, err := c.bufConnReader.Peek(maths.MinInt(numBytes, 100))
+				bz, err := c.bufConnReader.Peek(min(numBytes, 100))
 				if err == nil {
 					// return
 				} else {
@@ -809,14 +808,14 @@ func (ch *Channel) nextPacketMsg() PacketMsg {
 	packet := PacketMsg{}
 	packet.ChannelID = ch.desc.ID
 	maxSize := ch.maxPacketMsgPayloadSize
-	packet.Bytes = ch.sending[:maths.MinInt(maxSize, len(ch.sending))]
+	packet.Bytes = ch.sending[:min(maxSize, len(ch.sending))]
 	if len(ch.sending) <= maxSize {
 		packet.EOF = byte(0x01)
 		ch.sending = nil
 		atomic.AddInt32(&ch.sendQueueSize, -1) // decrement sendQueueSize
 	} else {
 		packet.EOF = byte(0x00)
-		ch.sending = ch.sending[maths.MinInt(maxSize, len(ch.sending)):]
+		ch.sending = ch.sending[min(maxSize, len(ch.sending)):]
 	}
 	return packet
 }