Add toml-f branch specification, update read_force_field

.gitmodules

@@ -1,3 +1,4 @@
 [submodule "subprojects/toml-f"]
 	path = subprojects/toml-f
 	url = https://github.com/hori-lab/toml-f
+	branch = sis

check/input_T2S2HP.toml

@@ -1,22 +1,20 @@
 title = "sis input"
 
-[job]
+[Job]
 type = "MD"
 #type = "CHECK_FORCE"
 
-[files]
-      [files.in]
-      #ff = "./rna_cg1_triplet.ff"
+[Files]
+      [Files.In]
       ff = "./sis_dih_ReB_NN.ff"
       fasta = "T2S2HP.fasta"
-      pdb_ini = "T2S2HP_folded.pdb"
-      #xyz_ini = "T2S2HP_random.xyz"
+      xyz_ini = "T2S2HP_random.xyz"
 
-      [files.out]
+      [Files.Out]
       types = ["bp", "bpe", "bpall"]
       prefix = "./test_T2S2HP"
 
-[condition]
+[Condition]
       #tempK = 348.15
       tempK = 300.00
       rng_seed = 123

src/read_force_field.F90

@@ -22,6 +22,8 @@ subroutine read_force_field(stat)
    type(toml_table), allocatable :: table
    type(toml_table), pointer :: group, node, subnode
    !type(toml_array), pointer :: array
+   type(toml_context) :: context
+   type(toml_error), allocatable :: tm_err
    !======= 
 
    stat = .False.
@@ -42,11 +44,17 @@ subroutine read_force_field(stat)
       error stop
    endif
 
-   call toml_parse(table, hdl)
+   call toml_load(table, hdl, context=context, error=tm_err)
 
    close(hdl)
    iopen_hdl = iopen_hdl - 1
 
+   if (allocated(tm_err)) then
+      print '(a)', tm_err%message
+      flush(6)
+      return
+   endif
+
    call get_value(table, "title", cline)
    print '(2a)', '# title: ', trim(cline)
    flush(6)