Mercurial > hg > freeDiameter
view extensions/dict_json/json-schema-to-c.cc @ 1355:70b6067f4552
Add tool to generate dict_json_dict_schema.cc from dict_json_dict_schema.json.
author | Thomas Klausner <tk@giga.or.at> |
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date | Sat, 18 May 2019 11:06:01 +0200 |
parents | |
children | cf411b1dcbbb |
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/********************************************************************************************************** * Software License Agreement (BSD License) * * Author: Thomas Klausner <tk@giga.or.at> * * * * Copyright (c) 2016, 2017, 2019 Thomas Klausner * * All rights reserved. * * * * Written under contract by nfotex IT GmbH, http://nfotex.com/ * * * * Redistribution and use of this software in source and binary forms, with or without modification, are * * permitted provided that the following conditions are met: * * * * * Redistributions of source code must retain the above * * copyright notice, this list of conditions and the * * following disclaimer. * * * * * Redistributions in binary form must reproduce the above * * copyright notice, this list of conditions and the * * following disclaimer in the documentation and/or other * * materials provided with the distribution. * * * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED * * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR * * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * **********************************************************************************************************/ #include <errno.h> #include <getopt.h> #include <inttypes.h> #include <libgen.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/stat.h> #include <json/SchemaValidator.h> [[noreturn]] void usage(char *prg, int exit_status) { FILE *f = (exit_status ? stderr : stdout); fprintf(f, "Usage: %s [-hV] [-i include] [-N variable-name] [-n namespace] [-t type] json [output]\n", prg); fprintf(f, "options:\n\ -h, --help print this usage message and exit\n\ -i, --include FILE include FILE in output C source file\n\ -n, --namespace NAME specify namespace in which to define variable\n\ -N, --name NAME specify name of variable to define\n\ --no-validate don't validate against JSON meta schema (default)\n\ --type TYPE specify type of variable (char * (default) or std::string)\n\ --validate validate against JSON meta schema\n\ --validate-only validate against JSON meta schema and exit (don't create C source)\n\ "); exit(exit_status); } const char *OPTIONS = "hi:N:n:t:V"; enum { OPT_NO_VALIDATE = 256, OPT_VALIDATE_ONLY }; struct option options[] = { { "help", no_argument, NULL, 'h' }, { "include", required_argument, NULL, 'i' }, { "name", required_argument, NULL, 'N' }, { "namespace", required_argument, NULL, 'n' }, { "no-validate", no_argument, NULL, OPT_NO_VALIDATE }, { "type", required_argument, NULL, 't' }, { "validate", no_argument, NULL, 'V' }, { "validate-only", no_argument, NULL, OPT_VALIDATE_ONLY }, { NULL, 0, NULL, 0 } }; char *read_full_file (const char *filename, off_t max_size, off_t* size_ret, const char *desc) { FILE *fp; if ((fp = fopen (filename, "rb")) == NULL) { fprintf (stderr, "couldn't open %s file [%s]: %d, %s\n", desc, filename, errno, strerror(errno)); return NULL; } struct stat stat_buf; if (fstat (fileno(fp), &stat_buf) < 0) { fprintf (stderr, "couldn't stat %s file [%s]: %d, %s\n", desc, filename, errno, strerror(errno)); fclose (fp); return NULL; } off_t n = stat_buf.st_size; if (max_size > 0 && n > max_size) { fprintf (stderr, "%s file [%s] is larger than %" PRIi64 " bytes\n", desc, filename, (int64_t)max_size); fclose (fp); return NULL; } char *buf; if ((buf = (char *) malloc ((size_t)n+1)) == NULL) { fprintf (stderr, "error allocating %" PRIi64 " bytes for read of %s file [%s]\n", (int64_t)n, desc, filename); fclose (fp); return NULL; } if (fread (buf, 1, (size_t)n, fp) < (size_t) n) { fprintf (stderr, "error reading %s file [%s]: %d, %s\n", desc, filename, errno, strerror(errno)); fclose (fp); free (buf); return NULL; } fclose (fp); buf[n] = '\0'; if (size_ret != NULL) *size_ret = n; return buf; } int main (int argc, char **argv) { char *name_space = NULL; char *name = NULL; bool free_name = false; char default_type[] = "char *"; char *type = default_type; bool validate = false; bool convert = true; char *include = NULL; int c; while ((c=getopt_long(argc, argv, OPTIONS, options, NULL)) != EOF) { switch (c) { case 'i': include = optarg; break; case 'N': name = optarg; break; case 'n': name_space = optarg; break; case 't': type = optarg; break; case 'V': validate = true; break; case OPT_NO_VALIDATE: validate = false; break; case OPT_VALIDATE_ONLY: validate = true; convert = false; break; case 'h': usage(argv[0], 0); default: usage(argv[0], 1); } } if (optind != argc - 2 && optind != argc - 1) usage(argv[0], 1); char *input = argv[optind]; char *output = NULL; if (optind == argc -2) { output = argv[optind+1]; } char *str = read_full_file(input, 10*1024*1024, NULL, input); Json::Reader reader; Json::Value json; if (!reader.parse(str, json)) { fprintf(stderr, "%s: parse error: %s\n", input, reader.getFormattedErrorMessages()); exit(1); } if (validate) { std::string error_message; Json::SchemaValidator *validator; try { validator = Json::SchemaValidator::create_meta_validator(); } catch (Json::SchemaValidator::Exception e) { fprintf(stderr, "%s: can't create meta schema validator\n", argv[0]); exit(1); } if (!validator->validate(json)) { const std::vector<Json::SchemaValidator::Error> errors = validator->errors(); for (unsigned int i=0; i<errors.size(); i++) fprintf(stderr, "%s:%s: %s\n", input, errors[i].path.c_str(), errors[i].message.c_str()); exit(1); } try { Json::SchemaValidator v(json); } catch (Json::SchemaValidator::Exception e) { fprintf(stderr, "%s: can't create schema validator: %s\n", argv[0], e.type_message().c_str()); for (auto error : e.errors) { fprintf(stderr, "%s:%s: %s\n", input, error.path.c_str(), error.message.c_str()); } exit(1); } } if (!convert) { exit(0); } FILE *fin = fopen(input, "r"); if (fin == NULL) { fprintf(stderr, "%s: can't open schema file [%s]: %s\n", argv[0], input, strerror(errno)); exit(1); } FILE *fout; if (output) { fout = fopen(output, "w"); if (fout == NULL) { fprintf(stderr, "%s: can't create output file [%s]: %s\n", argv[0], output, strerror(errno)); exit(1); } } else { fout = stdout; } if (name == NULL) { char *base = basename(input); char *end = strrchr(base, '.'); if (end == NULL) { end = base + strlen(base); } name = strndup(base, static_cast<size_t>(end-base)); for (char *p = name; *p; p++) { if ((*p >= 'A' && *p < 'Z') || (*p >= 'a' && *p < 'z') || *p == '_') { continue; } else if (*p >= '0' && *p <= '9') { if (p > name) { continue; } } *p = '_'; } } else { for (const char *p = name; *p; p++) { if ((*p >= 'A' && *p < 'Z') || (*p >= 'a' && *p < 'z') || *p == '_') { continue; } else if (*p >= '0' && *p <= '9') { if (p > name) { continue; } } else if (p[0] == ':' && p[1] == ':') { p += 1; continue; } fprintf(stderr, "%s: name [%s] is not a valid C identifier\n", argv[0], name); exit(1); } } if (include) { fprintf(fout, "#include <%s>\n\n", include); } if (strcmp(type, "std::string") == 0) { fputs("#include <string>\n\n", fout); } if (name_space) { fprintf(fout, "namespace %s {\n\n", name_space); } fprintf(fout, "const %s %s = \"\\\n", type, name); if (free_name) { free(name); name = NULL; } char line[8192]; while (fgets(line, sizeof(line), fin)) { if (line[strlen(line)-1] == '\n') line[strlen(line)-1] = '\0'; char *p = line; char *end = line+strlen(line); char *q; do { q = p + strcspn(p, "\"\\"); if (q < end) { fprintf(fout, "%.*s\\%c", (int)(q-p), p, *q); p=q+1; } else fprintf(fout, "%s", p); } while (q < end); fputs(" \\n\\\n", fout); } fputs("\";\n", fout); if (name_space) { fputs("\n}\n", fout); } if (ferror(fin)) { fprintf(stderr, "%s: read error on schema file [%s]: %s\n", argv[0], input, strerror(errno)); fclose(fout); unlink(output); exit(1); } fclose(fin); if (ferror(fout)) { fprintf(stderr, "%s: write error on output file [%s]: %s\n", argv[0], output, strerror(errno)); fclose(fout); unlink(output); exit(1); } fclose(fout); exit(0); }