libuci.c

   1 /*
   2  * libuci - Library for the Unified Configuration Interface
   3  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 /*
  16  * This file contains some common code for the uci library
  17  */
  18
  19 #include <sys/types.h>
  20 #include <stdbool.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include "libuci.h"
  25
  26 #define DEBUG
  27 #include "err.h"
  28
  29 static const char *uci_errstr[] = {
  30         [UCI_OK] =           "Success",
  31         [UCI_ERR_MEM] =      "Out of memory",
  32         [UCI_ERR_INVAL] =    "Invalid argument",
  33         [UCI_ERR_NOTFOUND] = "Entry not found",
  34         [UCI_ERR_PARSE] =    "Parse error",
  35         [UCI_ERR_UNKNOWN] =  "Unknown error",
  36 };
  37
  38
  39 /*
  40  * UCI wrapper for malloc, which uses exception handling
  41  */
  42 static void *uci_malloc(struct uci_context *ctx, size_t size)
  43 {
  44         void *ptr;
  45
  46         ptr = malloc(size);
  47         if (!ptr)
  48                 UCI_THROW(ctx, UCI_ERR_MEM);
  49         memset(ptr, 0, size);
  50
  51         return ptr;
  52 }
  53
  54 /*
  55  * UCI wrapper for realloc, which uses exception handling
  56  */
  57 static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
  58 {
  59         ptr = realloc(ptr, size);
  60         if (!ptr)
  61                 UCI_THROW(ctx, UCI_ERR_MEM);
  62
  63         return ptr;
  64 }
  65
  66 /*
  67  * UCI wrapper for strdup, which uses exception handling
  68  */
  69 static char *uci_strdup(struct uci_context *ctx, const char *str)
  70 {
  71         char *ptr;
  72
  73         ptr = strdup(str);
  74         if (!ptr)
  75                 UCI_THROW(ctx, UCI_ERR_MEM);
  76
  77         return ptr;
  78 }
  79
  80 #include "list.c"
  81 #include "parse.c"
  82
  83 /* externally visible functions */
  84
  85 struct uci_context *uci_alloc(void)
  86 {
  87         struct uci_context *ctx;
  88
  89         ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
  90         memset(ctx, 0, sizeof(struct uci_context));
  91         uci_list_init(&ctx->root);
  92
  93         return ctx;
  94 }
  95
  96 int uci_cleanup(struct uci_context *ctx)
  97 {
  98         UCI_HANDLE_ERR(ctx);
  99         uci_parse_cleanup(ctx);
 100         return 0;
 101 }
 102
 103 void uci_perror(struct uci_context *ctx, const char *str)
 104 {
 105         int err;
 106
 107         if (!ctx)
 108                 err = UCI_ERR_INVAL;
 109         else
 110                 err = ctx->errno;
 111
 112         if ((err < 0) || (err >= UCI_ERR_LAST))
 113                 err = UCI_ERR_UNKNOWN;
 114
 115         switch (err) {
 116         case UCI_ERR_PARSE:
 117                 if (ctx->pctx) {
 118                         fprintf(stderr, "%s: %s at line %d, byte %d\n", str, uci_errstr[err], ctx->pctx->line, ctx->pctx->byte);
 119                         break;
 120                 }
 121                 /* fall through */
 122         default:
 123                 fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);
 124                 break;
 125         }
 126 }
 127
 128