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# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (C) 2019, Raspberry Pi (Trading) Limited
#
# ctt_pretty_print_json.py - camera tuning tool JSON formatter
import sys
class JSONPrettyPrinter(object):
"""
Take a collapsed JSON file and make it more readable
"""
def __init__(self, fout):
self.state = {
"indent": 0,
"inarray": [False],
"arraycount": [],
"skipnewline": True
}
self.fout = fout
def newline(self):
self.fout.write('\n')
self.fout.write(' ' * self.state["indent"] * 4)
def process_char(self, c):
if c == '{':
if not self.state["skipnewline"]:
self.newline()
self.fout.write(c)
self.state["indent"] += 1
self.newline()
elif c == '}':
self.state["indent"] -= 1
self.newline()
self.fout.write(c)
elif c == '[':
self.newline()
self.fout.write(c)
self.state["indent"] += 1
self.newline()
self.state["inarray"] = [True] + self.state["inarray"]
self.state["arraycount"] = [0] + self.state["arraycount"]
elif c == ']':
self.state["indent"] -= 1
self.newline()
self.state["inarray"].pop(0)
self.state["arraycount"].pop(0)
self.fout.write(c)
elif c == ':':
self.fout.write(c)
self.fout.write(' ')
elif c == ',':
if not self.state["inarray"][0]:
self.fout.write(c)
self.fout.write(' ')
self.newline()
else:
self.fout.write(c)
self.state["arraycount"][0] += 1
if self.state["arraycount"][0] == 16:
self.state["arraycount"][0] = 0
self.newline()
else:
self.fout.write(' ')
elif c.isspace():
pass
else:
self.fout.write(c)
self.state["skipnewline"] = (c == '[')
def print(self, string):
for c in string:
self.process_char(c)
def pretty_print_json(str_in, output_filename):
with open(output_filename, "w") as fout:
printer = JSONPrettyPrinter(fout)
printer.print(str_in)
if __name__ == '__main__':
if len(sys.argv) != 2:
print("Usage: %s filename" % sys.argv[0])
sys.exit(1)
input_filename = sys.argv[1]
with open(input_filename, "r") as fin:
printer = JSONPrettyPrinter(sys.stdout)
printer.print(fin.read())
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