Merge pull request #87 from xelatihy/amalgamate

Single include script

Author: lemire

.github/workflows/amalgamate-ubuntu20.yml

@@ -0,0 +1,25 @@
+name: Amalgamate Ubuntu 20.04 CI (GCC 9, 8)
+
+on: [push, pull_request]
+
+jobs:
+  ubuntu-build:
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Legacy/x86 compilers cause CI failures.
+          #- {cxx: -DCMAKE_CXX_COMPILER=g++-8, arch:                         }
+          - {cxx:                           , arch:                         } # default=gcc9
+          #- {cxx:                           , arch: -DCMAKE_CXX_FLAGS="-m32"} # default=gcc9
+    steps:
+      - uses: actions/checkout@v2
+      - name: Compile with amalgamation
+        run: |
+          mkdir build &&
+          mkdir build/fast_float &&
+          python3 ./script/amalgamate.py > build/fast_float/fast_float.h &&
+          cp tests/string_test.cpp build/ &&
+          cd build &&
+          g++ string_test.cpp

CONTRIBUTORS

@@ -3,3 +3,4 @@ Maksim Kita
 Marcin Wojdyr
 Neal Richardson
 Tim Paine
+Fabio Pellacini

README.md

@@ -141,6 +141,13 @@ target_link_libraries(myprogram PUBLIC fast_float)
 
 ```
 
+## Using as single header
+
+The script `script/amalgamate.py` may be used to generate a single header 
+version of the library if so desired.
+Just run the script from the root directory of this repository. 
+You can customize the license type and output file if desired as described in
+the command line help.
 
 ## Credit
 

script/amalgamate.py

@@ -0,0 +1,56 @@
+# text parts
+processed_files = { }
+
+# authors
+for filename in ['AUTHORS', 'CONTRIBUTORS']:
+  with open(filename) as f:
+    text = ''
+    for line in f:
+      if filename == 'AUTHORS':
+        text += '// fast_float by ' + line
+      if filename == 'CONTRIBUTORS':
+        text += '// with contributions from ' + line
+    processed_files[filename] = text
+
+# licenses
+for filename in ['LICENSE-MIT', 'LICENSE-APACHE']:
+  with open(filename) as f:
+    text = ''
+    for line in f:
+      text += '// ' + line
+    processed_files[filename] = text
+
+# code
+for filename in [ 'fast_float.h', 'float_common.h', 'ascii_number.h', 
+                  'fast_table.h', 'decimal_to_binary.h', 'ascii_number.h', 
+                  'simple_decimal_conversion.h', 'parse_number.h']:
+  with open('include/fast_float/' + filename) as f:
+    text = ''
+    for line in f:
+      if line.startswith('#include "'): continue
+      text += line
+    processed_files[filename] = text
+
+# command line
+import argparse
+
+parser = argparse.ArgumentParser(description='Amalgamate fast_float.')
+parser.add_argument('--license', default='MIT', help='choose license')
+parser.add_argument('--output', default='', help='output file (stdout if none')
+
+args = parser.parse_args()
+
+text = '\n\n'.join([
+  processed_files['AUTHORS'], processed_files['CONTRIBUTORS'], 
+  processed_files['LICENSE-' + args.license],
+  processed_files['fast_float.h'], processed_files['float_common.h'], 
+  processed_files['ascii_number.h'], processed_files['fast_table.h'],
+  processed_files['decimal_to_binary.h'], processed_files['ascii_number.h'],
+  processed_files['simple_decimal_conversion.h'],
+  processed_files['parse_number.h']])
+
+if args.output:
+  with open(args.output, 'wt') as f:
+    f.write(text)
+else:
+  print(text)