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179 lines
3.3 KiB
C
179 lines
3.3 KiB
C
/* Simple library for printing JSON data.
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Copyright (C) 2014-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <string.h>
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#include "json-lib.h"
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void
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json_init (json_ctx_t *ctx, unsigned int indent_level, FILE *fp)
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{
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ctx->indent_level = indent_level;
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ctx->fp = fp;
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ctx->first_element = true;
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}
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static void
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do_indent (json_ctx_t *ctx)
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{
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char indent_buf[ctx->indent_level + 1];
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memset (indent_buf, ' ', ctx->indent_level + 1);
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indent_buf[ctx->indent_level] = '\0';
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fputs (indent_buf, ctx->fp);
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}
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void
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json_document_begin (json_ctx_t *ctx)
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{
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do_indent (ctx);
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fputs ("{\n", ctx->fp);
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ctx->indent_level++;
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ctx->first_element = true;
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}
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void
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json_document_end (json_ctx_t *ctx)
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{
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ctx->indent_level--;
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do_indent (ctx);
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fputs ("\n}", ctx->fp);
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}
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void
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json_attr_object_begin (json_ctx_t *ctx, const char *name)
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{
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if (!ctx->first_element)
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fprintf (ctx->fp, ",\n");
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do_indent (ctx);
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fprintf (ctx->fp, "\"%s\": {\n", name);
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ctx->indent_level++;
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ctx->first_element = true;
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}
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void
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json_attr_object_end (json_ctx_t *ctx)
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{
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ctx->indent_level--;
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ctx->first_element = false;
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fputs ("\n", ctx->fp);
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do_indent (ctx);
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fputs ("}", ctx->fp);
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}
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void
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json_attr_string (json_ctx_t *ctx, const char *name, const char *s)
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{
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if (!ctx->first_element)
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fprintf (ctx->fp, ",\n");
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else
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ctx->first_element = false;
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do_indent (ctx);
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fprintf (ctx->fp, "\"%s\": \"%s\"", name, s);
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}
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void
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json_attr_double (json_ctx_t *ctx, const char *name, double d)
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{
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if (!ctx->first_element)
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fprintf (ctx->fp, ",\n");
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else
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ctx->first_element = false;
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do_indent (ctx);
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fprintf (ctx->fp, "\"%s\": %g", name, d);
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}
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void
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json_array_begin (json_ctx_t *ctx, const char *name)
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{
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if (!ctx->first_element)
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fprintf (ctx->fp, ",\n");
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do_indent (ctx);
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fprintf (ctx->fp, "\"%s\": [", name);
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ctx->indent_level++;
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ctx->first_element = true;
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}
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void
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json_array_end (json_ctx_t *ctx)
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{
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ctx->indent_level--;
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ctx->first_element = false;
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fputs ("]", ctx->fp);
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}
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void
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json_element_double (json_ctx_t *ctx, double d)
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{
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if (!ctx->first_element)
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fprintf (ctx->fp, ", %g", d);
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else
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{
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fprintf (ctx->fp, "%g", d);
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ctx->first_element = false;
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}
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}
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void
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json_element_object_begin (json_ctx_t *ctx)
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{
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if (!ctx->first_element)
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fprintf (ctx->fp, ",");
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fputs ("\n", ctx->fp);
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do_indent (ctx);
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fputs ("{\n", ctx->fp);
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ctx->indent_level++;
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ctx->first_element = true;
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}
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void
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json_element_object_end (json_ctx_t *ctx)
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{
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ctx->indent_level--;
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ctx->first_element = false;
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fputs ("\n", ctx->fp);
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do_indent (ctx);
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fputs ("}", ctx->fp);
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}
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