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- /*
- * Copyright 2021
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- * These are the four essential freedoms with GNU GPL software:
- * 1: freedom to run the program, for any purpose
- * 2: freedom to study how the program works, and change it to make it do what you wish
- * 3: freedom to redistribute copies to help your Free Software friends
- * 4: freedom to distribute copies of your modified versions to your Free Software friends
- * , ,
- * / \
- * ((__-^^-,-^^-__))
- * `-_---' `---_-'
- * `--|o` 'o|--'
- * \ ` /
- * ): :(
- * :o_o:
- * "-"
- *
- * SPDX-License-Identifier: GPL-3.0+
- * License-Filename: LICENSE
- */
- /* parse jgf json graph data using json.c */
- /* todo the gtk+ libs seem already have a json parser, test if that can be used instead of json.c */
- #include "config.h"
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <zlib.h>
- #include "splay-tree.h"
- #include "main.h"
- #include "hier.h"
- #include "uniqnode.h"
- #include "uniqstr.h"
- #include "jgf.h"
- #include "json.h"
- #include "dpmem.h"
- #include "dot.tab.h" /* for yydebug */
- /* update sizes */
- #undef LIBJSON_DEFAULT_STACK_SIZE
- #undef LIBJSON_DEFAULT_BUFFER_SIZE
- #define LIBJSON_DEFAULT_STACK_SIZE (4*256)
- #define LIBJSON_DEFAULT_BUFFER_SIZE (4*4096)
- static splay_tree jgftree = NULL;
- /* no errors */
- static int jgferror = 0;
- /* debug option */
- static int jgfdebug = 0;
- static char *jgfstring_of_errors[] = {
- [JSON_ERROR_NO_MEMORY] = "out of memory",
- [JSON_ERROR_BAD_CHAR] = "bad character",
- [JSON_ERROR_POP_EMPTY] = "stack empty",
- [JSON_ERROR_POP_UNEXPECTED_MODE] = "pop unexpected mode",
- [JSON_ERROR_NESTING_LIMIT] = "nesting limit",
- [JSON_ERROR_DATA_LIMIT] = "data limit",
- [JSON_ERROR_COMMENT_NOT_ALLOWED] = "comment not allowed by config",
- [JSON_ERROR_UNEXPECTED_CHAR] = "unexpected char",
- [JSON_ERROR_UNICODE_MISSING_LOW_SURROGATE] = "missing unicode low surrogate",
- [JSON_ERROR_UNICODE_UNEXPECTED_LOW_SURROGATE] = "unexpected unicode low surrogate",
- [JSON_ERROR_COMMA_OUT_OF_STRUCTURE] = "error comma out of structure",
- [JSON_ERROR_CALLBACK] = "error in a callback",
- [JSON_ERROR_UTF8] = "utf8 validation error"
- };
- static void jgfparse_clear(void)
- {
- if (jgftree) {
- jgftree = splay_tree_delete(jgftree);
- }
- return;
- }
- /* static int jgfprocess_file(json_parser * parser, FILE * input, int *retlines, int *retcols) okd */
- static int jgfprocess_file(json_parser * parser, gzFile zinput, int *retlines, int *retcols)
- {
- char buffer[(32 * 1024)];
- int ret = 0;
- int32_t read = 0;
- int lines = 0;
- int col = 0;
- uint32_t i = 0;
- uint32_t processed = 0;
- lines = 1;
- col = 0;
- while (1) {
- read = gzread(zinput, (char *)buffer, (32 * 1024));
- /* read = fread(buffer, 1, (32 * 1024), input); old */
- if (read <= 0) {
- /* eof */
- break;
- }
- ret = json_parser_string(parser, buffer, read, &processed);
- for (i = 0; i < processed; i++) {
- if (buffer[i] == '\n') {
- col = 0;
- lines++;
- } else {
- col++;
- }
- }
- if (ret) {
- /* at parse error stop. */
- break;
- }
- }
- if (retlines) {
- *retlines = lines;
- }
- if (retcols) {
- *retcols = col;
- }
- return ret;
- }
- #define MODE_NONE 0
- #define MODE_INGRAPH 1
- #define MODE_INNODE 2
- #define MODE_INEDGE 3
- static int nkeys = 0;
- static int nodenr = 0;
- static char *nodelabel = NULL;
- static char *nodename = NULL;
- static char *fn = NULL;
- static char *tn = NULL;
- static int inesource = 0;
- static int inetarget = 0;
- static int inelabel = 0;
- static char *elabel = NULL;
- static int inlabel = 0;
- static int mode = 0;
- static struct gml_graph *curg = NULL;
- static void jgfaddnode(char *nnodename, int nr)
- {
- splay_tree_node node1 = NULL;
- node1 = splay_tree_lookup(jgftree, (splay_tree_key) nnodename);
- if (node1) {
- printf("%s(): node \"%s\" did already exist\n", __func__, nnodename);
- return;
- }
- if (jgfdebug || 0) {
- printf("%s(): adding node \"%s\"\n", __func__, nnodename);
- }
- splay_tree_insert(jgftree, (splay_tree_key) nnodename, (splay_tree_value) nr);
- return;
- }
- static void do_string(char *str)
- {
- if (mode == MODE_INNODE) {
- if (inlabel) {
- nodelabel = uniqstr(str);
- inlabel = 0;
- }
- } else if (mode == MODE_INEDGE) {
- if (inelabel) {
- elabel = uniqstr(str);
- inelabel = 0;
- }
- if (inesource) {
- fn = uniqstr(str);
- inesource = 0;
- }
- if (inetarget) {
- tn = uniqstr(str);
- inetarget = 0;
- }
- } else {
- }
- return;
- }
- static void do_data(void)
- {
- struct gml_node *fnn = NULL;
- struct gml_node *tnn = NULL;
- /* struct gml_node *nn = NULL; todo */
- splay_tree_node node1 = NULL;
- splay_tree_node node2 = NULL;
- char *ns = NULL;
- if (jgftree == NULL) {
- jgftree = splay_tree_new(splay_tree_compare_strings, NULL, NULL);
- }
- if (mode == MODE_INEDGE) {
- if (fn && tn) {
- /* if from or to node name does not exist yet, add it as nodes */
- node1 = splay_tree_lookup(jgftree, (splay_tree_key) fn);
- if (node1 == NULL) {
- printf("%s(): from \"%s\" did not exist\n", __func__, fn);
- /* uniq node number starting at 1 */
- maingraph->nodenum++;
- nodenr = maingraph->nodenum;
- ns = uniqstr(fn);
- jgfaddnode(ns, nodenr);
- add_new_node(curg, maingraph, nodenr, /* pvnl->nr */ (-1), ns, ns, /* ncolor */ 0x00ffffff, /* nbcolor */ 0, /* rlabel */
- NULL, /* hlabel */ NULL, /* fontcolor */ 0, /* ishtml */ 0);
- }
- node1 = splay_tree_lookup(jgftree, (splay_tree_key) fn);
- fnn = uniqnode(curg, node1->value);
- /* */
- node2 = splay_tree_lookup(jgftree, (splay_tree_key) tn);
- if (node2 == NULL) {
- printf("%s(): to \"%s\" did not exist\n", __func__, tn);
- /* uniq node number starting at 1 */
- maingraph->nodenum++;
- nodenr = maingraph->nodenum;
- ns = uniqstr(tn);
- jgfaddnode(ns, nodenr);
- add_new_node(curg, maingraph, nodenr, /* pvnl->nr */ (-1), ns, ns, /* ncolor */ 0x00ffffff, /* nbcolor */ 0, /* rlabel */
- NULL, /* hlabel */ NULL, /* fontcolor */ 0, /* ishtml */ 0);
- }
- node2 = splay_tree_lookup(jgftree, (splay_tree_key) tn);
- tnn = uniqnode(curg, node2->value);
- if (fnn && tnn) {
- if (fnn == tnn) {
- /* add selfedge count at this node */
- fnn->nselfedges++;
- } else {
- add_new_edge(curg, maingraph, /* foundsource */ fnn->nr, /* foundtarget */ tnn->nr,
- elabel,
- /* ecolor */ 0, /* style */ 0, /* fcompass */ NULL, /* tcompass */ NULL,
- /* constraint */ 1, /* ishtml */ 0);
- }
- }
- }
- fn = NULL;
- tn = NULL;
- elabel = NULL;
- }
- if (mode == MODE_INNODE) {
- if (nodename) {
- node1 = splay_tree_lookup(jgftree, (splay_tree_key) nodename);
- if (jgfdebug || 0) {
- printf("%s(): %p for node name %s\n", __func__, (void *)node1, nodename);
- }
- /* */
- if (node1 == NULL) {
- /* add new node with uniq node number starting at 1 */
- maingraph->nodenum++;
- nodenr = maingraph->nodenum;
- /* in jgf all nodes are located in rootgraph
- * use -1 for foundid then gml id check is not applied.
- */
- if (nodelabel == NULL) {
- nodelabel = nodename;
- }
- jgfaddnode(nodename, nodenr);
- add_new_node(curg, maingraph, nodenr, /* pvnl->nr */ (-1), nodename, nodelabel, /* ncolor */ 0x00ffffff, /* nbcolor */ 0, /* rlabel */
- NULL, /* hlabel */ NULL, /* fontcolor */ 0, /* ishtml */ 0);
- }
- /* */
- }
- nodename = NULL;
- nodelabel = NULL;
- }
- return;
- }
- static int do_key(char *str)
- {
- if (jgfdebug || 0) {
- printf("%s(): key=\"%s\" mode=%d\n", __func__, str, mode);
- }
- if (strcmp(str, "graph") == 0) {
- mode = MODE_INGRAPH;
- return (0);
- }
- if (strcmp(str, "graphs") == 0) {
- mode = MODE_INGRAPH;
- return (0);
- }
- if (nkeys == 0) {
- if (mode == MODE_NONE) {
- /* error first key should have been a graph or graphs */
- return (JSON_ERROR_UNEXPECTED_CHAR);
- }
- }
- nkeys++;
- /* skip all data until graph seen */
- if (mode == MODE_NONE) {
- return (0);
- }
- if (strcmp(str, "nodes") == 0) {
- mode = MODE_INNODE;
- return (0);
- }
- if (strcmp(str, "edges") == 0) {
- mode = MODE_INEDGE;
- return (0);
- }
- if (mode == MODE_INNODE) {
- if (strcmp(str, "label") == 0) {
- nodelabel = NULL;
- inlabel = 1;
- } else if (strcmp(str, "id") == 0) {
- } else if (strcmp(str, "metadata") == 0) {
- } else if (strcmp(str, "fillcolor") == 0) {
- } else if (strcmp(str, "bordercolor") == 0) {
- } else if (strcmp(str, "fontcolor") == 0) {
- } else {
- nodename = uniqstr(str);
- }
- } else if (mode == MODE_INEDGE) {
- if (strcmp(str, "source") == 0) {
- inesource = 1;
- } else if (strcmp(str, "target") == 0) {
- inetarget = 1;
- } else if (strcmp(str, "relation") == 0) {
- } else if (strcmp(str, "label") == 0) {
- inelabel = 1;
- } else {
- }
- } else {
- }
- return (0);
- }
- static int my_callback(void *userdata, int type, const char *data, uint32_t length)
- {
- int status = 0;
- FILE *output = (userdata) ? userdata : stdout;
- switch (type) {
- case JSON_OBJECT_BEGIN:
- if (jgfdebug || 0) {
- fprintf(output, "entering %s\n", (type == JSON_ARRAY_BEGIN) ? "array" : "object");
- }
- break;
- case JSON_ARRAY_BEGIN:
- if (jgfdebug || 0) {
- fprintf(output, "entering %s\n", (type == JSON_ARRAY_BEGIN) ? "array" : "object");
- }
- break;
- case JSON_OBJECT_END:
- if (jgfdebug || 0) {
- fprintf(output, "leaving %s\n", (type == JSON_ARRAY_END) ? "array" : "object");
- }
- do_data();
- break;
- case JSON_ARRAY_END:
- if (jgfdebug || 0) {
- fprintf(output, "leaving %s\n", (type == JSON_ARRAY_END) ? "array" : "object");
- }
- break;
- case JSON_KEY:
- if (jgfdebug || 0) {
- fprintf(output, "value \"%*s\" key\n", length, data);
- }
- status = do_key((char *)data);
- if (jgfdebug || 0) {
- printf("%d status\n", status);
- }
- break;
- case JSON_STRING:
- if (jgfdebug || 0) {
- fprintf(output, "value \"%*s\" string\n", length, data);
- }
- do_string((char *)data);
- break;
- case JSON_INT:
- if (jgfdebug || 0) {
- fprintf(output, "value \"%*s\" int\n", length, data);
- }
- break;
- case JSON_FLOAT:
- if (jgfdebug || 0) {
- fprintf(output, "value \"%*s\" float\n", length, data);
- }
- break;
- case JSON_NULL:
- if (jgfdebug || 0) {
- fprintf(output, "constant null\n");
- }
- break;
- case JSON_TRUE:
- if (jgfdebug || 0) {
- fprintf(output, "constant true\n");
- }
- break;
- case JSON_FALSE:
- if (jgfdebug || 0) {
- fprintf(output, "constant false\n");
- }
- break;
- default:
- /* shouldnothappen */
- printf("%s(): in default\n", __func__);
- break;
- }
- return (status);
- }
- static void wrapped_dp_free(void *p)
- {
- void *pp = NULL;
- if (p) {
- pp = dp_free(p);
- if (pp) {
- }
- }
- return;
- }
- /* int jgfparse(struct gml_graph *g, FILE * jgfinput, char *fname, char *argv0) old */
- int jgfparse(struct gml_graph *g, gzFile jgfinput, char *fname, char *argv0)
- {
- json_config jgfconfig;
- json_parser jgfparser;
- int ret = 0;
- int jgfcol = 0;
- int jgflines = 0;
- yydebug = 0;
- /* optional turn on debug */
- if (argv0) {
- if (strcmp(argv0, "gml4gtkd") == 0) {
- yydebug = 1;
- }
- }
- /* todo make a parse tree first. */
- nkeys = 0;
- curg = g;
- mode = MODE_NONE;
- /* no errors */
- jgferror = 0;
- memset(&jgfparser, 0, sizeof(json_parser));
- memset(&jgfconfig, 0, sizeof(json_config));
- /* read buffer size */
- jgfconfig.buffer_initial_size = LIBJSON_DEFAULT_BUFFER_SIZE;
- /* unlimited {} nesting */
- jgfconfig.max_nesting = 0;
- /* max. allowed memory usage */
- jgfconfig.max_data = 0;
- /* allow c style comments */
- jgfconfig.allow_c_comments = 1;
- /* allow yaml # style coments */
- jgfconfig.allow_yaml_comments = 1;
- /* wrap to own dpmem.c calloc/realloc/free */
- jgfconfig.user_calloc = dp_calloc;
- jgfconfig.user_realloc = dp_realloc;
- jgfconfig.user_free = wrapped_dp_free;
- /* debug option */
- jgfdebug = yydebug;
- ret = json_parser_init(&jgfparser, &jgfconfig, &my_callback, /* (void *)userdata */ NULL);
- if (ret) {
- /* shouldnothappen */
- }
- /* parse */
- ret = jgfprocess_file(&jgfparser, jgfinput, &jgflines, &jgfcol);
- if (ret) {
- fprintf(stderr, "jgf %s(): parse error at line %d, col %d code=%d %s in file %s\n", __func__, jgflines, jgfcol, ret,
- jgfstring_of_errors[ret], fname);
- memset(parsermessage, 0, 256);
- snprintf(parsermessage, (256 - 1), "jgf %s(): parse error at line %d, col %d code=%d %s in file %s\n", __func__,
- jgflines, jgfcol, ret, jgfstring_of_errors[ret], fname);
- jgfparse_clear();
- json_parser_free(&jgfparser);
- return (1);
- }
- ret = json_parser_is_done(&jgfparser);
- if (ret == 0) {
- /* parser is not in final state */
- fprintf(stderr, "jgf %s(): is_done parse error at line %d, col %d code=%d %s in file %s\n", __func__, jgflines,
- jgfcol, ret, jgfstring_of_errors[ret], fname);
- memset(parsermessage, 0, 256);
- snprintf(parsermessage, (256 - 1), "jgf %s(): is_done parse error at line %d, col %d code=%d %s in file %s\n",
- __func__, jgflines, jgfcol, ret, jgfstring_of_errors[ret], fname);
- jgfparse_clear();
- json_parser_free(&jgfparser);
- return (1);
- }
- jgfparse_clear();
- json_parser_free(&jgfparser);
- /* parsed oke. */
- return (0);
- }
- /* end. */
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