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 "uci.h"
  25 #include "err.h"
  26
  27 static const char *uci_errstr[] = {
  28         [UCI_OK] =           "Success",
  29         [UCI_ERR_MEM] =      "Out of memory",
  30         [UCI_ERR_INVAL] =    "Invalid argument",
  31         [UCI_ERR_NOTFOUND] = "Entry not found",
  32         [UCI_ERR_IO] =       "I/O error",
  33         [UCI_ERR_PARSE] =    "Parse error",
  34         [UCI_ERR_UNKNOWN] =  "Unknown error",
  35 };
  36
  37
  38 /*
  39  * UCI wrapper for malloc, which uses exception handling
  40  */
  41 static void *uci_malloc(struct uci_context *ctx, size_t size)
  42 {
  43         void *ptr;
  44
  45         ptr = malloc(size);
  46         if (!ptr)
  47                 UCI_THROW(ctx, UCI_ERR_MEM);
  48         memset(ptr, 0, size);
  49
  50         return ptr;
  51 }
  52
  53 /*
  54  * UCI wrapper for realloc, which uses exception handling
  55  */
  56 static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
  57 {
  58         ptr = realloc(ptr, size);
  59         if (!ptr)
  60                 UCI_THROW(ctx, UCI_ERR_MEM);
  61
  62         return ptr;
  63 }
  64
  65 /*
  66  * UCI wrapper for strdup, which uses exception handling
  67  */
  68 static char *uci_strdup(struct uci_context *ctx, const char *str)
  69 {
  70         char *ptr;
  71
  72         ptr = strdup(str);
  73         if (!ptr)
  74                 UCI_THROW(ctx, UCI_ERR_MEM);
  75
  76         return ptr;
  77 }
  78
  79 #include "list.c"
  80 #include "file.c"
  81
  82 /* externally visible functions */
  83
  84 struct uci_context *uci_alloc(void)
  85 {
  86         struct uci_context *ctx;
  87
  88         ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
  89         memset(ctx, 0, sizeof(struct uci_context));
  90         uci_list_init(&ctx->root);
  91
  92         return ctx;
  93 }
  94
  95 void uci_free(struct uci_context *ctx)
  96 {
  97         struct uci_element *e, *tmp;
  98
  99         uci_cleanup(ctx);
 100         uci_foreach_element_safe(&ctx->root, tmp, e) {
 101                 uci_free_package(uci_to_package(e));
 102         }
 103         free(ctx);
 104         return;
 105 }
 106
 107 int uci_cleanup(struct uci_context *ctx)
 108 {
 109         UCI_HANDLE_ERR(ctx);
 110         uci_file_cleanup(ctx);
 111         return 0;
 112 }
 113
 114 void uci_perror(struct uci_context *ctx, const char *str)
 115 {
 116         int err;
 117
 118         if (!ctx)
 119                 err = UCI_ERR_INVAL;
 120         else
 121                 err = ctx->errno;
 122
 123         if ((err < 0) || (err >= UCI_ERR_LAST))
 124                 err = UCI_ERR_UNKNOWN;
 125
 126         switch (err) {
 127         case UCI_ERR_PARSE:
 128                 if (ctx->pctx) {
 129                         fprintf(stderr, "%s: %s (%s) at line %d, byte %d\n", str, uci_errstr[err], (ctx->pctx->reason ? ctx->pctx->reason : "unknown"), ctx->pctx->line, ctx->pctx->byte);
 130                         break;
 131                 }
 132                 /* fall through */
 133         default:
 134                 fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);
 135                 break;
 136         }
 137 }
 138
 139