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Issue #929: fix bad calculation of error offset when parsing in the apps/json_parse tool.

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Also, show the failing character in hex to ensure error output is readable.
This commit is contained in:
Eric Hawicz
2026-06-21 12:43:20 -04:00
parent d1018cf6ba
commit 1d658982e5
1 changed files with 3 additions and 3 deletions
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apps/json_parse.c
+3 -3
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@@ -111,12 +111,12 @@ static int parseit(int fd, int (*callback)(struct json_object *))
size_t parse_end = json_tokener_get_parse_end(tok);
if (obj == NULL && jerr != json_tokener_continue)
{
const char *aterr = (start_pos + parse_end < (int)sizeof(buf)) ?
const char *aterr = (start_pos + parse_end < retu) ?
&buf[start_pos + parse_end] : "";
fflush(stdout);
size_t fail_offset = total_read - retu + start_pos + parse_end;
fprintf(stderr, "Failed at offset %lu: %s %c\n", (unsigned long)fail_offset,
json_tokener_error_desc(jerr), aterr[0]);
fprintf(stderr, "Failed at offset %lu: %s: char=0x%02x\n", (unsigned long)fail_offset,
json_tokener_error_desc(jerr), (unsigned char)aterr[0]);
json_tokener_free(tok);
return 1;
}