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base: Prettier JSON output / options

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- Add flags for indenting with 2, 4, or 8 spaces, still defaulting to
   tabs if none of those are set.

 - Don't emit a newline before emitting scalar values in dicts.
This commit is contained in:
Nicolas Williams
2022-10-01 00:12:09 -05:00
parent c6a46f0c96
commit 03f06b9472
2 changed files with 47 additions and 19 deletions
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6
lib/base/heimbase.h
View File

@@ -463,7 +463,11 @@ typedef enum heim_json_flags {
HEIM_JSON_F_STRICT = 31,
HEIM_JSON_F_CNULL2JSNULL = 32,
HEIM_JSON_F_TRY_DECODE_DATA = 64,
HEIM_JSON_F_ONE_LINE = 128
HEIM_JSON_F_ONE_LINE = 128,
/* The default is to indent with one tab */
HEIM_JSON_F_INDENT2 = 256,
HEIM_JSON_F_INDENT4 = 512,
HEIM_JSON_F_INDENT8 = 1024,
} heim_json_flags_t;
heim_object_t heim_json_create(const char *, size_t, heim_json_flags_t,

60
lib/base/json.c
View File

@@ -66,7 +66,7 @@ struct heim_strbuf {
};
static int
base2json(heim_object_t, struct twojson *);
base2json(heim_object_t, struct twojson *, int);
static void
indent(struct twojson *j)
@@ -74,8 +74,18 @@ indent(struct twojson *j)
size_t i = j->indent;
if (j->flags & HEIM_JSON_F_ONE_LINE)
return;
while (i--)
j->out(j->ctx, "\t");
if (j->flags & HEIM_JSON_F_INDENT2)
while (i--)
j->out(j->ctx, " ");
else if (j->flags & HEIM_JSON_F_INDENT4)
while (i--)
j->out(j->ctx, " ");
else if (j->flags & HEIM_JSON_F_INDENT8)
while (i--)
j->out(j->ctx, " ");
else
while (i--)
j->out(j->ctx, "\t");
}
static void
@@ -90,7 +100,7 @@ array2json(heim_object_t value, void *ctx, int *stop)
j->out(j->ctx, NULL); /* eat previous '\n' if possible */
j->out(j->ctx, ",\n");
}
j->ret = base2json(value, j);
j->ret = base2json(value, j, 0);
}
static void
@@ -105,19 +115,29 @@ dict2json(heim_object_t key, heim_object_t value, void *ctx)
j->out(j->ctx, NULL); /* eat previous '\n' if possible */
j->out(j->ctx, ",\n");
}
j->ret = base2json(key, j);
j->ret = base2json(key, j, 0);
if (j->ret)
return;
j->out(j->ctx, " : \n");
j->indent++;
j->ret = base2json(value, j);
if (j->ret)
return;
j->indent--;
switch (heim_get_tid(value)) {
case HEIM_TID_ARRAY:
case HEIM_TID_DICT:
case HEIM_TID_DATA:
j->out(j->ctx, ":\n");
j->indent++;
j->ret = base2json(value, j, 0);
if (j->ret)
return;
j->indent--;
break;
default:
j->out(j->ctx, ": ");
j->ret = base2json(value, j, 1);
break;
}
}
static int
base2json(heim_object_t obj, struct twojson *j)
base2json(heim_object_t obj, struct twojson *j, int skip_indent)
{
heim_tid_t type;
int first = 0;
@@ -174,7 +194,8 @@ base2json(heim_object_t obj, struct twojson *j)
int good;
size_t i;
indent(j);
if (!skip_indent)
indent(j);
j->out(j->ctx, "\"");
for (p = s; (c = *p); p++) {
switch (c) {
@@ -383,7 +404,7 @@ base2json(heim_object_t obj, struct twojson *j)
heim_release(d);
return ENOMEM;
}
ret = base2json(d, j);
ret = base2json(d, j, 0);
heim_release(d);
if (ret)
return ret;
@@ -393,17 +414,20 @@ base2json(heim_object_t obj, struct twojson *j)
case HEIM_TID_NUMBER: {
char num[32];
indent(j);
if (!skip_indent)
indent(j);
snprintf(num, sizeof (num), "%d", heim_number_get_int(obj));
j->out(j->ctx, num);
break;
}
case HEIM_TID_NULL:
indent(j);
if (!skip_indent)
indent(j);
j->out(j->ctx, "null");
break;
case HEIM_TID_BOOL:
indent(j);
if (!skip_indent)
indent(j);
j->out(j->ctx, heim_bool_val(obj) ? "true" : "false");
break;
default:
@@ -427,7 +451,7 @@ heim_base2json(heim_object_t obj, void *ctx, heim_json_flags_t flags,
j.ret = 0;
j.first = 1;
return base2json(obj, &j);
return base2json(obj, &j, 0);
}