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/* Simple library for printing JSON data.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <string.h>
#include "json-lib.h"
void
json_init (json_ctx_t *ctx, unsigned int indent_level, FILE *fp)
{
ctx->indent_level = indent_level;
ctx->fp = fp;
ctx->first_element = true;
}
static void
do_indent (json_ctx_t *ctx)
{
char indent_buf[ctx->indent_level + 1];
memset (indent_buf, ' ', ctx->indent_level + 1);
indent_buf[ctx->indent_level] = '\0';
fputs (indent_buf, ctx->fp);
}
void
json_document_begin (json_ctx_t *ctx)
{
do_indent (ctx);
fputs ("{\n", ctx->fp);
ctx->indent_level++;
ctx->first_element = true;
}
void
json_document_end (json_ctx_t *ctx)
{
ctx->indent_level--;
do_indent (ctx);
fputs ("\n}", ctx->fp);
}
void
json_attr_object_begin (json_ctx_t *ctx, const char *name)
{
if (!ctx->first_element)
fprintf (ctx->fp, ",\n");
do_indent (ctx);
fprintf (ctx->fp, "\"%s\": {\n", name);
ctx->indent_level++;
ctx->first_element = true;
}
void
json_attr_object_end (json_ctx_t *ctx)
{
ctx->indent_level--;
ctx->first_element = false;
fputs ("\n", ctx->fp);
do_indent (ctx);
fputs ("}", ctx->fp);
}
void
json_attr_string (json_ctx_t *ctx, const char *name, const char *s)
{
if (!ctx->first_element)
fprintf (ctx->fp, ",\n");
else
ctx->first_element = false;
do_indent (ctx);
fprintf (ctx->fp, "\"%s\": \"%s\"", name, s);
}
void
json_attr_double (json_ctx_t *ctx, const char *name, double d)
{
if (!ctx->first_element)
fprintf (ctx->fp, ",\n");
else
ctx->first_element = false;
do_indent (ctx);
fprintf (ctx->fp, "\"%s\": %g", name, d);
}
void
json_array_begin (json_ctx_t *ctx, const char *name)
{
if (!ctx->first_element)
fprintf (ctx->fp, ",\n");
do_indent (ctx);
fprintf (ctx->fp, "\"%s\": [", name);
ctx->indent_level++;
ctx->first_element = true;
}
void
json_array_end (json_ctx_t *ctx)
{
ctx->indent_level--;
ctx->first_element = false;
fputs ("]", ctx->fp);
}
void
json_element_double (json_ctx_t *ctx, double d)
{
if (!ctx->first_element)
fprintf (ctx->fp, ", %g", d);
else
{
fprintf (ctx->fp, "%g", d);
ctx->first_element = false;
}
}
void
json_element_object_begin (json_ctx_t *ctx)
{
if (!ctx->first_element)
fprintf (ctx->fp, ",");
fputs ("\n", ctx->fp);
do_indent (ctx);
fputs ("{\n", ctx->fp);
ctx->indent_level++;
ctx->first_element = true;
}
void
json_element_object_end (json_ctx_t *ctx)
{
ctx->indent_level--;
ctx->first_element = false;
fputs ("\n", ctx->fp);
do_indent (ctx);
fputs ("}", ctx->fp);
}
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