--- /dev/null
+CC=gcc
+CFLAGS=-O2 -Wall -pedantic -std=gnu99
+
+all: parsetest
+parsetest: libuci.o test.o
+ $(CC) $(CFLAGS) -o $@ $^
+
+libuci.o: libuci.c parse.c libuci.h
+test.o: test.c libuci.h
+
+clean:
+ rm -f parsetest *.o
--- /dev/null
+/*
+ * libuci - Library for the Unified Configuration Interface
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * this program is free software; you can redistribute it and/or modify
+ * it under the terms of the gnu lesser general public license version 2.1
+ * as published by the free software foundation
+ *
+ * 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.
+ */
+
--- /dev/null
+/*
+ * libuci - Library for the Unified Configuration Interface
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * 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.
+ */
+
+/*
+ * This file contains some common code for the uci library
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "libuci.h"
+
+#define DEBUG
+
+#ifdef DEBUG
+#define DPRINTF(...) fprintf(stderr, __VA_ARGS__)
+#else
+#define DPRINTF(...)
+#endif
+/*
+ * throw an uci exception and store the error number
+ * in the context.
+ */
+#define UCI_THROW(ctx, err) do { \
+ longjmp(ctx->trap, err); \
+} while (0)
+
+/*
+ * store the return address for handling exceptions
+ * needs to be called in every externally visible library function
+ *
+ * NB: this does not handle recursion at all. Calling externally visible
+ * functions from other uci functions is only allowed at the end of the
+ * calling function.
+ */
+#define UCI_HANDLE_ERR(ctx) do { \
+ int __val; \
+ if (!ctx) \
+ return UCI_ERR_INVAL; \
+ __val = setjmp(ctx->trap); \
+ if (__val) { \
+ ctx->errno = __val; \
+ return __val; \
+ } \
+} while (0)
+
+/*
+ * check the specified condition.
+ * throw an invalid argument exception if it's false
+ */
+#define UCI_ASSERT(ctx, expr) do { \
+ if (!(expr)) { \
+ DPRINTF("[%s:%d] Assertion failed\n", __FILE__, __LINE__); \
+ UCI_THROW(ctx, UCI_ERR_INVAL); \
+ } \
+} while (0)
+
+
+static char *uci_errstr[] = {
+ [UCI_OK] = "Success",
+ [UCI_ERR_MEM] = "Out of memory",
+ [UCI_ERR_INVAL] = "Invalid argument",
+ [UCI_ERR_NOTFOUND] = "Entry not found",
+ [UCI_ERR_PARSE] = "Parse error",
+ [UCI_ERR_UNKNOWN] = "Unknown error",
+};
+
+
+/*
+ * UCI wrapper for malloc, which uses exception handling
+ */
+static void *uci_malloc(struct uci_context *ctx, size_t size)
+{
+ void *ptr;
+
+ ptr = malloc(size);
+ if (!ptr)
+ UCI_THROW(ctx, UCI_ERR_MEM);
+ memset(ptr, 0, size);
+
+ return ptr;
+}
+
+/*
+ * UCI wrapper for realloc, which uses exception handling
+ */
+static void *uci_realloc(struct uci_context *ctx, void *ptr, size_t size)
+{
+ ptr = realloc(ptr, size);
+ if (!ptr)
+ UCI_THROW(ctx, UCI_ERR_MEM);
+
+ return ptr;
+}
+
+#include "hash.c"
+#include "parse.c"
+
+/* externally visible functions */
+
+struct uci_context *uci_alloc(void)
+{
+ struct uci_context *ctx;
+
+ ctx = (struct uci_context *) malloc(sizeof(struct uci_context));
+ memset(ctx, 0, sizeof(struct uci_context));
+
+ return ctx;
+}
+
+int uci_cleanup(struct uci_context *ctx)
+{
+ UCI_HANDLE_ERR(ctx);
+ uci_parse_cleanup(ctx);
+ return 0;
+}
+
+void uci_perror(struct uci_context *ctx, const char *str)
+{
+ int err;
+
+ if (!ctx)
+ err = UCI_ERR_INVAL;
+ else
+ err = ctx->errno;
+
+ if ((err < 0) || (err >= UCI_ERR_LAST))
+ err = UCI_ERR_UNKNOWN;
+
+ switch (err) {
+ case UCI_ERR_PARSE:
+ if (ctx->pctx) {
+ fprintf(stderr, "%s: %s at line %d, byte %d\n", str, uci_errstr[err], ctx->pctx->line, ctx->pctx->byte);
+ break;
+ }
+ /* fall through */
+ default:
+ fprintf(stderr, "%s: %s\n", str, uci_errstr[err]);
+ break;
+ }
+}
+
+
--- /dev/null
+/*
+ * libuci - Library for the Unified Configuration Interface
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * this program is free software; you can redistribute it and/or modify
+ * it under the terms of the gnu lesser general public license version 2.1
+ * as published by the free software foundation
+ *
+ * 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.
+ */
+
+#ifndef __LIBUCI_H
+#define __LIBUCI_H
+
+#include <setjmp.h>
+#include <stdio.h>
+
+enum
+{
+ UCI_OK = 0,
+ UCI_ERR_MEM,
+ UCI_ERR_INVAL,
+ UCI_ERR_NOTFOUND,
+ UCI_ERR_PARSE,
+ UCI_ERR_UNKNOWN,
+ UCI_ERR_LAST
+};
+
+struct uci_config;
+struct uci_parse_context;
+
+struct uci_context
+{
+ struct uci_config *root;
+
+ /* for error handling only */
+ struct uci_parse_context *pctx;
+
+ /* private: */
+ int errno;
+ jmp_buf trap;
+};
+
+struct uci_parse_context
+{
+ int line;
+ int byte;
+
+ /* private: */
+ FILE *file;
+ char *buf;
+ int bufsz;
+};
+
+
+/**
+ * uci_alloc: Allocate a new uci context
+ */
+extern struct uci_context *uci_alloc(void);
+
+/**
+ * uci_perror: Print the last uci error that occured
+ * @ctx: uci context
+ * @str: string to print before the error message
+ */
+extern void uci_perror(struct uci_context *ctx, const char *str);
+
+/**
+ * uci_parse: Parse an uci config file and store it in the uci context
+ *
+ * @ctx: uci context
+ * @name: name of the config file (relative to the config directory)
+ */
+int uci_parse(struct uci_context *ctx, const char *name);
+
+/**
+ * uci_cleanup: Clean up after an error
+ *
+ * @ctx: uci context
+ */
+int uci_cleanup(struct uci_context *ctx);
+
+#endif
--- /dev/null
+/*
+ * libuci - Library for the Unified Configuration Interface
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * this program is free software; you can redistribute it and/or modify
+ * it under the terms of the gnu lesser general public license version 2.1
+ * as published by the free software foundation
+ *
+ * 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.
+ */
+
+/*
+ * This file contains the code for parsing uci config files
+ */
+
+#include <ctype.h>
+
+#define LINEBUF 128
+#define LINEBUF_MAX 4096
+
+/*
+ * Fetch a new line from the input stream and resize buffer if necessary
+ */
+static void uci_getln(struct uci_context *ctx)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+ char *p;
+ int ofs;
+
+ if (pctx->buf == NULL) {
+ pctx->buf = uci_malloc(ctx, LINEBUF);
+ pctx->bufsz = LINEBUF;
+ }
+
+ ofs = 0;
+ do {
+ p = &pctx->buf[ofs];
+ p[ofs] = 0;
+
+ p = fgets(p, pctx->bufsz - ofs, pctx->file);
+ if (!p || !p[ofs])
+ return;
+
+ ofs += strlen(p);
+ if (pctx->buf[ofs - 1] == '\n') {
+ pctx->line++;
+ pctx->buf[ofs - 1] = 0;
+ return;
+ }
+
+ if (pctx->bufsz > LINEBUF_MAX/2) {
+ pctx->byte = LINEBUF_MAX;
+ UCI_THROW(ctx, UCI_ERR_PARSE);
+ }
+
+ pctx->bufsz *= 2;
+ pctx->buf = uci_realloc(ctx, pctx->buf, pctx->bufsz);
+ } while (1);
+}
+
+/*
+ * Clean up all extra memory used by the parser
+ */
+static void uci_parse_cleanup(struct uci_context *ctx)
+{
+ struct uci_parse_context *pctx;
+
+ pctx = ctx->pctx;
+ if (!pctx)
+ return;
+
+ if (pctx->buf)
+ free(pctx->buf);
+ if (pctx->file)
+ fclose(pctx->file);
+
+ free(pctx);
+}
+
+static void skip_whitespace(char **str)
+{
+ while (**str && isspace(**str))
+ *str += 1;
+}
+
+static char *parse_double_quote(char **str)
+{
+ char *val;
+
+ *str += 1;
+ val = *str;
+ while (**str) {
+
+ /* skip escaped characters */
+ if (**str == '\\') {
+ *str += 2;
+ continue;
+ }
+
+ /* check for the end of the quoted string */
+ if (**str == '"') {
+ **str = 0;
+ *str += 1;
+ return val;
+ }
+ *str += 1;
+ }
+
+ return NULL;
+}
+
+static char *parse_single_quote(char **str)
+{
+ /* TODO: implement */
+ return NULL;
+}
+
+static char *parse_unquoted(char **str)
+{
+ char *val;
+
+ val = *str;
+
+ while (**str && !isspace(**str))
+ *str += 1;
+ **str = 0;
+ *str += 1;
+
+ return val;
+}
+
+static char *next_arg(char **str)
+{
+ skip_whitespace(str);
+
+ switch (**str) {
+ case '"':
+ return parse_double_quote(str);
+ case '\'':
+ return parse_single_quote(str);
+ case 0:
+ return NULL;
+ default:
+ return parse_unquoted(str);
+ }
+}
+
+static void uci_parse_config(struct uci_context *ctx, char **str)
+{
+ char *type, *name;
+
+ *str += strlen(*str) + 1;
+
+ if (!*str) {
+ ctx->pctx->byte = *str - ctx->pctx->buf;
+ UCI_THROW(ctx, UCI_ERR_PARSE);
+ }
+
+ type = next_arg(str);
+ if (!type) {
+ ctx->pctx->byte = *str - ctx->pctx->buf;
+ UCI_THROW(ctx, UCI_ERR_PARSE);
+ }
+
+ name = next_arg(str);
+ DPRINTF("Section<%s>: %s\n", type, name);
+}
+
+static void uci_parse_option(struct uci_context *ctx, char **str)
+{
+ char *name, *value;
+
+ *str += strlen(*str) + 1;
+
+ name = next_arg(str);
+ if (!name) {
+ ctx->pctx->byte = *str - ctx->pctx->buf;
+ UCI_THROW(ctx, UCI_ERR_PARSE);
+ }
+
+ value = next_arg(str);
+ if (!value) {
+ ctx->pctx->byte = *str - ctx->pctx->buf;
+ UCI_THROW(ctx, UCI_ERR_PARSE);
+ }
+
+ DPRINTF("\tOption: %s=\"%s\"\n", name, value);
+}
+
+static void uci_parse_line(struct uci_context *ctx)
+{
+ struct uci_parse_context *pctx = ctx->pctx;
+ char *word, *brk;
+
+ for (word = strtok_r(pctx->buf, ";", &brk);
+ word;
+ word = strtok_r(NULL, ";", &brk)) {
+
+ char *pbrk;
+ word = strtok_r(word, " \t", &pbrk);
+
+ switch(word[0]) {
+ case 'c':
+ if ((word[1] == 0) || !strcmp(word + 1, "onfig"))
+ uci_parse_config(ctx, &word);
+ break;
+ case 'o':
+ if ((word[1] == 0) || !strcmp(word + 1, "ption"))
+ uci_parse_option(ctx, &word);
+ break;
+ default:
+ pctx->byte = word - pctx->buf;
+ UCI_THROW(ctx, UCI_ERR_PARSE);
+ break;
+ }
+ }
+}
+
+int uci_parse(struct uci_context *ctx, const char *name)
+{
+ struct uci_parse_context *pctx;
+
+ UCI_HANDLE_ERR(ctx);
+ UCI_ASSERT(ctx, name != NULL);
+
+ /* make sure no memory from previous parse attempts is leaked */
+ uci_parse_cleanup(ctx);
+
+ pctx = (struct uci_parse_context *) uci_malloc(ctx, sizeof(struct uci_parse_context));
+ ctx->pctx = pctx;
+
+ /* TODO: use /etc/config/ */
+ pctx->file = fopen(name, "r");
+ if (!pctx->file)
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+
+ while (!feof(pctx->file)) {
+ uci_getln(ctx);
+ if (*(pctx->buf))
+ uci_parse_line(ctx);
+ }
+
+ /* if no error happened, we can get rid of the parser context now */
+ uci_parse_cleanup(ctx);
+
+ return 0;
+}
+
+
--- /dev/null
+/*
+ * libuci - Library for the Unified Configuration Interface
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1
+ * as published by the Free Software Foundation
+ *
+ * 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.
+ */
+#include "libuci.h"
+
+int main(int argc, char **argv)
+{
+ struct uci_context *ctx = uci_alloc();
+
+ if (!ctx) {
+ fprintf(stderr, "Failed to allocate uci context");
+ return 1;
+ }
+
+ if (uci_parse(ctx, argv[1])) {
+ uci_perror(ctx, "uci_parse");
+ return 1;
+ }
+
+ return 0;
+}
projects / uci.git / commitdiff