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Make json_parse a bit more useful by adding -u (validate UTF8) and -P (specify arbitrary tokener parse flags), and read from stdin if no filename is provided.

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This commit is contained in:
Eric Hawicz
2025-07-08 21:02:52 -04:00
parent 7cee5237dc
commit bf92456789
1 changed files with 27 additions and 14 deletions
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41
apps/json_parse.c
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@@ -38,6 +38,8 @@
static int formatted_output = JSON_C_TO_STRING_SPACED;
static int show_output = 1;
static int strict_mode = 0;
static int validate_utf8 = 0;
static int tokener_flags = 0;
static int color = 0;
static const char *fname = NULL;
@@ -76,11 +78,18 @@ static int parseit(int fd, int (*callback)(struct json_object *))
}
if (strict_mode)
{
json_tokener_set_flags(tok, JSON_TOKENER_STRICT
#ifdef JSON_TOKENER_ALLOW_TRAILING_CHARS
| JSON_TOKENER_ALLOW_TRAILING_CHARS
tokener_flags |= JSON_TOKENER_STRICT;
#ifdef JSON_TOKENER_ALLOW_TRAILING_CHARS
tokener_flags |= JSON_TOKENER_ALLOW_TRAILING_CHARS;
#endif
);
}
if (validate_utf8)
{
tokener_flags |= JSON_TOKENER_VALIDATE_UTF8;
}
if (tokener_flags)
{
json_tokener_set_flags(tok, tokener_flags);
}
// XXX push this into some kind of json_tokener_parse_fd API?
@@ -160,13 +169,15 @@ static void usage(const char *argv0, int exitval, const char *errmsg)
fp = stderr;
if (errmsg != NULL)
fprintf(fp, "ERROR: %s\n\n", errmsg);
fprintf(fp, "Usage: %s [-f|-F <arg>] [-n] [-s]\n", argv0);
fprintf(fp, "Usage: %s [-f|-F <arg>] [-n] [-s] [-u] [filename]\n", argv0);
fprintf(fp, " -f - Format the output to stdout with JSON_C_TO_STRING_PRETTY (default is JSON_C_TO_STRING_SPACED)\n");
fprintf(fp, " -F - Format the output to stdout with <arg>, e.g. 0 for JSON_C_TO_STRING_PLAIN\n");
fprintf(fp, " -n - No output\n");
fprintf(fp, " -c - color\n");
fprintf(fp, " -s - Parse in strict mode, flags:\n");
fprintf(fp, " -c - Set JSON_C_TO_STRING_COLOR to colorize the output\n");
fprintf(fp, " -P - Initialize tokener flags to the given value\n");
fprintf(fp, " -s - Parse in strict mode, add flags:\n");
fprintf(fp, " JSON_TOKENER_STRICT|JSON_TOKENER_ALLOW_TRAILING_CHARS\n");
fprintf(fp, " -u - Add the JSON_TOKENER_VALIDATE_UTF8 flag when parsing\n");
fprintf(fp, " Diagnostic information will be emitted to stderr\n");
fprintf(fp, "\nWARNING WARNING WARNING\n");
@@ -178,26 +189,28 @@ int main(int argc, char **argv)
{
int opt;
while ((opt = getopt(argc, argv, "fF:hnsc")) != -1)
while ((opt = getopt(argc, argv, "cfF:hnP:su")) != -1)
{
switch (opt)
{
case 'c': color = JSON_C_TO_STRING_COLOR; break;
case 'f': formatted_output = JSON_C_TO_STRING_PRETTY; break;
case 'F': formatted_output = atoi(optarg); break;
case 'n': show_output = 0; break;
case 'P': tokener_flags = atoi(optarg); break;
case 's': strict_mode = 1; break;
case 'c': color = JSON_C_TO_STRING_COLOR; break;
case 'u': validate_utf8 = 1; break;
case 'h': usage(argv[0], 0, NULL);
default: /* '?' */ usage(argv[0], EXIT_FAILURE, "Unknown arguments");
}
}
if (optind >= argc)
int fd = STDIN_FILENO;
fname = "stdin";
if (argc > optind && strcmp(argv[optind], "-") != 0)
{
usage(argv[0], EXIT_FAILURE, "Expected argument after options");
fname = argv[optind];
fd = open(fname, O_RDONLY, 0);
}
fname = argv[optind];
int fd = open(argv[optind], O_RDONLY, 0);
showmem();
if (parseit(fd, showobj) != 0)
exit(EXIT_FAILURE);