add really basic yaml document graph building and writing functionality
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fe1664d311
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4 changed files with 243 additions and 0 deletions
109
libifupdown/yaml-base.c
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109
libifupdown/yaml-base.c
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/*
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* libifupdown/yaml-base.c
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* Purpose: YAML implementation -- base
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*
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* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#include <string.h>
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#include "libifupdown/libifupdown.h"
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#include "libifupdown/yaml-base.h"
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void
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lif_yaml_document_init(struct lif_yaml_node *doc, const char *name)
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{
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memset(doc, '\0', sizeof *doc);
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doc->value_type = LIF_YAML_OBJECT;
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if (name != NULL)
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doc->name = strdup(name);
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}
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struct lif_yaml_node *
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lif_yaml_document_new(const char *name)
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{
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struct lif_yaml_node *doc = calloc(1, sizeof *doc);
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lif_yaml_document_init(doc, name);
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doc->malloced = true;
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return doc;
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}
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struct lif_yaml_node *
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lif_yaml_node_new_string(const char *name, const char *value)
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{
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struct lif_yaml_node *node = calloc(1, sizeof *node);
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node->malloced = true;
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node->value_type = LIF_YAML_STRING;
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if (name != NULL)
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node->name = strdup(name);
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if (value != NULL)
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node->value = strdup(value);
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return node;
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}
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struct lif_yaml_node *
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lif_yaml_node_new_object(const char *name)
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{
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struct lif_yaml_node *node = calloc(1, sizeof *node);
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node->malloced = true;
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node->value_type = LIF_YAML_OBJECT;
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if (name != NULL)
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node->name = strdup(name);
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return node;
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}
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struct lif_yaml_node *
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lif_yaml_node_new_list(const char *name)
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{
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struct lif_yaml_node *node = calloc(1, sizeof *node);
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node->malloced = true;
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node->value_type = LIF_YAML_LIST;
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if (name != NULL)
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node->name = strdup(name);
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return node;
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}
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void
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lif_yaml_node_free(struct lif_yaml_node *node)
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{
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struct lif_node *iter, *next;
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LIF_LIST_FOREACH_SAFE(iter, next, node->children.head)
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{
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struct lif_yaml_node *iter_node = iter->data;
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lif_yaml_node_free(iter_node);
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}
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free(node->name);
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free(node->value);
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if (node->malloced)
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free(node);
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}
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void
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lif_yaml_node_append_child(struct lif_yaml_node *parent, struct lif_yaml_node *child)
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{
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lif_node_insert_tail(&child->node, child, &parent->children);
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}
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47
libifupdown/yaml-base.h
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47
libifupdown/yaml-base.h
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/*
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* libifupdown/yaml-base.h
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* Purpose: YAML implementation -- base
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*
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* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#ifndef LIBIFUPDOWN_YAML_BASE_H__GUARD
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#define LIBIFUPDOWN_YAML_BASE_H__GUARD
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#include "libifupdown/libifupdown.h"
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/* this is a subset of types supported by our implementation */
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enum lif_yaml_value {
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LIF_YAML_STRING,
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LIF_YAML_LIST,
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LIF_YAML_OBJECT
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};
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struct lif_yaml_node {
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struct lif_node node;
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bool malloced;
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char *name;
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enum lif_yaml_value value_type;
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char *value; /* for string nodes */
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struct lif_list children; /* for list and object nodes */
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};
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extern void lif_yaml_document_init(struct lif_yaml_node *doc, const char *name);
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extern struct lif_yaml_node *lif_yaml_document_new(const char *name);
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extern struct lif_yaml_node *lif_yaml_node_new_string(const char *name, const char *value);
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extern struct lif_yaml_node *lif_yaml_node_new_object(const char *name);
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extern struct lif_yaml_node *lif_yaml_node_new_list(const char *name);
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extern void lif_yaml_node_free(struct lif_yaml_node *node);
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extern void lif_yaml_node_append_child(struct lif_yaml_node *parent, struct lif_yaml_node *child);
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#endif
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63
libifupdown/yaml-writer.c
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63
libifupdown/yaml-writer.c
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/*
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* libifupdown/yaml-writer.c
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* Purpose: YAML implementation -- writer
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*
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* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "libifupdown/libifupdown.h"
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#include "libifupdown/yaml-base.h"
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#include "libifupdown/yaml-writer.h"
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static const size_t INDENT_WIDTH = 2;
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static void
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lif_yaml_write_node(struct lif_yaml_node *node, FILE *f, size_t indent)
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{
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struct lif_node *iter;
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if (node->name != NULL)
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fprintf(f, "%*s%s: ", (int) indent, "", node->name);
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size_t child_indent = indent + INDENT_WIDTH;
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switch (node->value_type)
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{
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case LIF_YAML_STRING:
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fprintf(f, "%s\n", node->value);
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break;
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case LIF_YAML_OBJECT:
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fprintf(f, "\n");
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break;
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case LIF_YAML_LIST:
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fprintf(f, "\n");
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child_indent += INDENT_WIDTH;
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break;
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}
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LIF_LIST_FOREACH(iter, node->children.head)
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{
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struct lif_yaml_node *iter_node = iter->data;
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if (node->value_type == LIF_YAML_LIST)
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fprintf(f, "%*s-\n", (int) (child_indent - INDENT_WIDTH), "");
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lif_yaml_write_node(iter_node, f, child_indent);
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}
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}
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void
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lif_yaml_write(struct lif_yaml_node *doc, FILE *f)
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{
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lif_yaml_write_node(doc, f, 0);
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}
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24
libifupdown/yaml-writer.h
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24
libifupdown/yaml-writer.h
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/*
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* libifupdown/yaml-writer.h
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* Purpose: YAML implementation -- writer
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*
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* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* This software is provided 'as is' and without any warranty, express or
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* implied. In no event shall the authors be liable for any damages arising
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* from the use of this software.
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*/
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#ifndef LIBIFUPDOWN_YAML_WRITER_H__GUARD
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#define LIBIFUPDOWN_YAML_WRITER_H__GUARD
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#include "libifupdown/libifupdown.h"
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#include "libifupdown/yaml-base.h"
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extern void lif_yaml_write(struct lif_yaml_node *doc, FILE *f);
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#endif
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