First attempt for autotools conversion

AUTHORS

@@ -0,0 +1 @@
+Gérald Colangelo <opensource@yanluo.net>

COPYING

@@ -0,0 +1,6 @@
+Copyright © Gérald COLANGELO
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+The Software is provided “as is”, without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the Software."

INSTALL

@@ -0,0 +1,368 @@
+Installation Instructions
+*************************
+
+   Copyright (C) 1994-1996, 1999-2002, 2004-2016 Free Software
+Foundation, Inc.
+
+   Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.  This file is offered as-is,
+without warranty of any kind.
+
+Basic Installation
+==================
+
+   Briefly, the shell command './configure && make && make install'
+should configure, build, and install this package.  The following
+more-detailed instructions are generic; see the 'README' file for
+instructions specific to this package.  Some packages provide this
+'INSTALL' file but do not implement all of the features documented
+below.  The lack of an optional feature in a given package is not
+necessarily a bug.  More recommendations for GNU packages can be found
+in *note Makefile Conventions: (standards)Makefile Conventions.
+
+   The 'configure' shell script attempts to guess correct values for
+various system-dependent variables used during compilation.  It uses
+those values to create a 'Makefile' in each directory of the package.
+It may also create one or more '.h' files containing system-dependent
+definitions.  Finally, it creates a shell script 'config.status' that
+you can run in the future to recreate the current configuration, and a
+file 'config.log' containing compiler output (useful mainly for
+debugging 'configure').
+
+   It can also use an optional file (typically called 'config.cache' and
+enabled with '--cache-file=config.cache' or simply '-C') that saves the
+results of its tests to speed up reconfiguring.  Caching is disabled by
+default to prevent problems with accidental use of stale cache files.
+
+   If you need to do unusual things to compile the package, please try
+to figure out how 'configure' could check whether to do them, and mail
+diffs or instructions to the address given in the 'README' so they can
+be considered for the next release.  If you are using the cache, and at
+some point 'config.cache' contains results you don't want to keep, you
+may remove or edit it.
+
+   The file 'configure.ac' (or 'configure.in') is used to create
+'configure' by a program called 'autoconf'.  You need 'configure.ac' if
+you want to change it or regenerate 'configure' using a newer version of
+'autoconf'.
+
+   The simplest way to compile this package is:
+
+  1. 'cd' to the directory containing the package's source code and type
+     './configure' to configure the package for your system.
+
+     Running 'configure' might take a while.  While running, it prints
+     some messages telling which features it is checking for.
+
+  2. Type 'make' to compile the package.
+
+  3. Optionally, type 'make check' to run any self-tests that come with
+     the package, generally using the just-built uninstalled binaries.
+
+  4. Type 'make install' to install the programs and any data files and
+     documentation.  When installing into a prefix owned by root, it is
+     recommended that the package be configured and built as a regular
+     user, and only the 'make install' phase executed with root
+     privileges.
+
+  5. Optionally, type 'make installcheck' to repeat any self-tests, but
+     this time using the binaries in their final installed location.
+     This target does not install anything.  Running this target as a
+     regular user, particularly if the prior 'make install' required
+     root privileges, verifies that the installation completed
+     correctly.
+
+  6. You can remove the program binaries and object files from the
+     source code directory by typing 'make clean'.  To also remove the
+     files that 'configure' created (so you can compile the package for
+     a different kind of computer), type 'make distclean'.  There is
+     also a 'make maintainer-clean' target, but that is intended mainly
+     for the package's developers.  If you use it, you may have to get
+     all sorts of other programs in order to regenerate files that came
+     with the distribution.
+
+  7. Often, you can also type 'make uninstall' to remove the installed
+     files again.  In practice, not all packages have tested that
+     uninstallation works correctly, even though it is required by the
+     GNU Coding Standards.
+
+  8. Some packages, particularly those that use Automake, provide 'make
+     distcheck', which can by used by developers to test that all other
+     targets like 'make install' and 'make uninstall' work correctly.
+     This target is generally not run by end users.
+
+Compilers and Options
+=====================
+
+   Some systems require unusual options for compilation or linking that
+the 'configure' script does not know about.  Run './configure --help'
+for details on some of the pertinent environment variables.
+
+   You can give 'configure' initial values for configuration parameters
+by setting variables in the command line or in the environment.  Here is
+an example:
+
+     ./configure CC=c99 CFLAGS=-g LIBS=-lposix
+
+   *Note Defining Variables::, for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+   You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each architecture in their
+own directory.  To do this, you can use GNU 'make'.  'cd' to the
+directory where you want the object files and executables to go and run
+the 'configure' script.  'configure' automatically checks for the source
+code in the directory that 'configure' is in and in '..'.  This is known
+as a "VPATH" build.
+
+   With a non-GNU 'make', it is safer to compile the package for one
+architecture at a time in the source code directory.  After you have
+installed the package for one architecture, use 'make distclean' before
+reconfiguring for another architecture.
+
+   On MacOS X 10.5 and later systems, you can create libraries and
+executables that work on multiple system types--known as "fat" or
+"universal" binaries--by specifying multiple '-arch' options to the
+compiler but only a single '-arch' option to the preprocessor.  Like
+this:
+
+     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
+                 CPP="gcc -E" CXXCPP="g++ -E"
+
+   This is not guaranteed to produce working output in all cases, you
+may have to build one architecture at a time and combine the results
+using the 'lipo' tool if you have problems.
+
+Installation Names
+==================
+
+   By default, 'make install' installs the package's commands under
+'/usr/local/bin', include files under '/usr/local/include', etc.  You
+can specify an installation prefix other than '/usr/local' by giving
+'configure' the option '--prefix=PREFIX', where PREFIX must be an
+absolute file name.
+
+   You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files.  If you
+pass the option '--exec-prefix=PREFIX' to 'configure', the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+   In addition, if you use an unusual directory layout you can give
+options like '--bindir=DIR' to specify different values for particular
+kinds of files.  Run 'configure --help' for a list of the directories
+you can set and what kinds of files go in them.  In general, the default
+for these options is expressed in terms of '${prefix}', so that
+specifying just '--prefix' will affect all of the other directory
+specifications that were not explicitly provided.
+
+   The most portable way to affect installation locations is to pass the
+correct locations to 'configure'; however, many packages provide one or
+both of the following shortcuts of passing variable assignments to the
+'make install' command line to change installation locations without
+having to reconfigure or recompile.
+
+   The first method involves providing an override variable for each
+affected directory.  For example, 'make install
+prefix=/alternate/directory' will choose an alternate location for all
+directory configuration variables that were expressed in terms of
+'${prefix}'.  Any directories that were specified during 'configure',
+but not in terms of '${prefix}', must each be overridden at install time
+for the entire installation to be relocated.  The approach of makefile
+variable overrides for each directory variable is required by the GNU
+Coding Standards, and ideally causes no recompilation.  However, some
+platforms have known limitations with the semantics of shared libraries
+that end up requiring recompilation when using this method, particularly
+noticeable in packages that use GNU Libtool.
+
+   The second method involves providing the 'DESTDIR' variable.  For
+example, 'make install DESTDIR=/alternate/directory' will prepend
+'/alternate/directory' before all installation names.  The approach of
+'DESTDIR' overrides is not required by the GNU Coding Standards, and
+does not work on platforms that have drive letters.  On the other hand,
+it does better at avoiding recompilation issues, and works well even
+when some directory options were not specified in terms of '${prefix}'
+at 'configure' time.
+
+Optional Features
+=================
+
+   If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving 'configure' the
+option '--program-prefix=PREFIX' or '--program-suffix=SUFFIX'.
+
+   Some packages pay attention to '--enable-FEATURE' options to
+'configure', where FEATURE indicates an optional part of the package.
+They may also pay attention to '--with-PACKAGE' options, where PACKAGE
+is something like 'gnu-as' or 'x' (for the X Window System).  The
+'README' should mention any '--enable-' and '--with-' options that the
+package recognizes.
+
+   For packages that use the X Window System, 'configure' can usually
+find the X include and library files automatically, but if it doesn't,
+you can use the 'configure' options '--x-includes=DIR' and
+'--x-libraries=DIR' to specify their locations.
+
+   Some packages offer the ability to configure how verbose the
+execution of 'make' will be.  For these packages, running './configure
+--enable-silent-rules' sets the default to minimal output, which can be
+overridden with 'make V=1'; while running './configure
+--disable-silent-rules' sets the default to verbose, which can be
+overridden with 'make V=0'.
+
+Particular systems
+==================
+
+   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU CC
+is not installed, it is recommended to use the following options in
+order to use an ANSI C compiler:
+
+     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
+
+and if that doesn't work, install pre-built binaries of GCC for HP-UX.
+
+   HP-UX 'make' updates targets which have the same time stamps as their
+prerequisites, which makes it generally unusable when shipped generated
+files such as 'configure' are involved.  Use GNU 'make' instead.
+
+   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
+parse its '<wchar.h>' header file.  The option '-nodtk' can be used as a
+workaround.  If GNU CC is not installed, it is therefore recommended to
+try
+
+     ./configure CC="cc"
+
+and if that doesn't work, try
+
+     ./configure CC="cc -nodtk"
+
+   On Solaris, don't put '/usr/ucb' early in your 'PATH'.  This
+directory contains several dysfunctional programs; working variants of
+these programs are available in '/usr/bin'.  So, if you need '/usr/ucb'
+in your 'PATH', put it _after_ '/usr/bin'.
+
+   On Haiku, software installed for all users goes in '/boot/common',
+not '/usr/local'.  It is recommended to use the following options:
+
+     ./configure --prefix=/boot/common
+
+Specifying the System Type
+==========================
+
+   There may be some features 'configure' cannot figure out
+automatically, but needs to determine by the type of machine the package
+will run on.  Usually, assuming the package is built to be run on the
+_same_ architectures, 'configure' can figure that out, but if it prints
+a message saying it cannot guess the machine type, give it the
+'--build=TYPE' option.  TYPE can either be a short name for the system
+type, such as 'sun4', or a canonical name which has the form:
+
+     CPU-COMPANY-SYSTEM
+
+where SYSTEM can have one of these forms:
+
+     OS
+     KERNEL-OS
+
+   See the file 'config.sub' for the possible values of each field.  If
+'config.sub' isn't included in this package, then this package doesn't
+need to know the machine type.
+
+   If you are _building_ compiler tools for cross-compiling, you should
+use the option '--target=TYPE' to select the type of system they will
+produce code for.
+
+   If you want to _use_ a cross compiler, that generates code for a
+platform different from the build platform, you should specify the
+"host" platform (i.e., that on which the generated programs will
+eventually be run) with '--host=TYPE'.
+
+Sharing Defaults
+================
+
+   If you want to set default values for 'configure' scripts to share,
+you can create a site shell script called 'config.site' that gives
+default values for variables like 'CC', 'cache_file', and 'prefix'.
+'configure' looks for 'PREFIX/share/config.site' if it exists, then
+'PREFIX/etc/config.site' if it exists.  Or, you can set the
+'CONFIG_SITE' environment variable to the location of the site script.
+A warning: not all 'configure' scripts look for a site script.
+
+Defining Variables
+==================
+
+   Variables not defined in a site shell script can be set in the
+environment passed to 'configure'.  However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost.  In order to avoid this problem, you should set
+them in the 'configure' command line, using 'VAR=value'.  For example:
+
+     ./configure CC=/usr/local2/bin/gcc
+
+causes the specified 'gcc' to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for 'CONFIG_SHELL' due to an
+Autoconf limitation.  Until the limitation is lifted, you can use this
+workaround:
+
+     CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+'configure' Invocation
+======================
+
+   'configure' recognizes the following options to control how it
+operates.
+
+'--help'
+'-h'
+     Print a summary of all of the options to 'configure', and exit.
+
+'--help=short'
+'--help=recursive'
+     Print a summary of the options unique to this package's
+     'configure', and exit.  The 'short' variant lists options used only
+     in the top level, while the 'recursive' variant lists options also
+     present in any nested packages.
+
+'--version'
+'-V'
+     Print the version of Autoconf used to generate the 'configure'
+     script, and exit.
+
+'--cache-file=FILE'
+     Enable the cache: use and save the results of the tests in FILE,
+     traditionally 'config.cache'.  FILE defaults to '/dev/null' to
+     disable caching.
+
+'--config-cache'
+'-C'
+     Alias for '--cache-file=config.cache'.
+
+'--quiet'
+'--silent'
+'-q'
+     Do not print messages saying which checks are being made.  To
+     suppress all normal output, redirect it to '/dev/null' (any error
+     messages will still be shown).
+
+'--srcdir=DIR'
+     Look for the package's source code in directory DIR.  Usually
+     'configure' can determine that directory automatically.
+
+'--prefix=DIR'
+     Use DIR as the installation prefix.  *note Installation Names:: for
+     more details, including other options available for fine-tuning the
+     installation locations.
+
+'--no-create'
+'-n'
+     Run the configure checks, but stop before creating any output
+     files.
+
+'configure' also accepts some other, not widely useful, options.  Run
+'configure --help' for more details.

Makefile.am

@@ -0,0 +1,2 @@
+ACLOCAL_AMFLAGS="-I m4"
+SUBDIRS = src/

README.md

@@ -0,0 +1,17 @@
+# This repo holds WIP, not usable "as-is" for the moment !!
+
+# smart_records
+A small library to write "records" with MySQL, CSV, UDP, Multicast and SQLite backends
+
+# Why ?
+Originally, i just wanted to add support of MySQL instead of CSV files to `rtl_power` and `rx_power` tools.
+
+To avoid code duplication, etc... i decided to write a small and simple wrapper library with optionnal support for MySQL (libmysqlclient), CSV (internal).
+Work is in progress to implement UDP (internal), Multicast (internal) and SQLite backends.
+
+I wanted it to be easy to add in any tools so:
+
+* No configuration file, everything information needed is passed with a single URI.
+* No huge runtime dependencies.
+* Optionnal backends (so that you can just embed what you need).
+

configure.ac

@@ -0,0 +1,82 @@
+AC_PREREQ([2.69])
+AC_INIT([smart-records], [0.1], [])
+AM_PROG_LIBTOOL
+AC_CONFIG_SRCDIR([src])
+AC_CONFIG_MACRO_DIRS([m4])
+AC_ENABLE_SHARED
+
+# Checks for programs.
+AC_PROG_CC
+AC_PROG_MAKE_SET
+
+LT_INIT
+AM_INIT_AUTOMAKE
+
+# Checks for header files.
+AC_CHECK_HEADERS([arpa/inet.h fcntl.h netinet/in.h stdlib.h string.h sys/socket.h unistd.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_TYPE_SIZE_T
+
+# Checks for library functions.
+AC_CHECK_FUNCS([memset socket strchr strdup strerror strndup])
+
+AC_ARG_ENABLE(interactive_terminal,
+    [AS_HELP_STRING([--with-interactive-terminal], [Compile with interactive terminal support for password prompting.], )],
+    [interactive_terminal=$withval], [interactive_terminal=no])
+if test x"$interactive_terminal" == x"yes"
+then
+    AC_DEFINE([_WITH_INTERACTIVE_TERMINAL], [1], ["Defined if you have interactive terminal"])
+    CFLAGS="$CFLAGS -D_WITH_INTERACTIVE_TEMRINAL"
+fi
+
+
+
+AC_ARG_ENABLE(csv,
+    [AS_HELP_STRING([--enable-csv], [Compile with CSV support], )],
+    [csv=$enableval], [csv=yes]) 
+if test x"$csv" == x"yes"
+then
+    AC_DEFINE([_HAS_CSV], [1], ["Defined if you have UDP support"])
+    CFLAGS="$CFLAGS -D_HAS_CSV"
+fi
+
+AC_ARG_ENABLE(udp,
+    [AS_HELP_STRING([--enable-udp], [Compile with CSV support], )],
+    [udp=$enableval], [udp=yes]) 
+if test x"$udp" == x"yes"
+then
+    AC_DEFINE([HAS_UDP], [1], ["Defined if you have UDP support"])
+    CFLAGS="$CFLAGS -D_HAS_UDP"
+fi
+
+AC_ARG_WITH(mysql,
+    [AS_HELP_STRING[(--with-mysql), [Compile with MySQL backend support, require libmysqlclient]]],
+    [],
+    [with_mysql=yes])
+
+echo $with_mysql
+if test x"with_mysql" != x"no"
+then
+    PKG_CHECK_MODULES(MYSQL, mysqlclient, [mysql=yes], [mysql=no])
+    if test x"mysql" = x"no"
+    then
+        AC_MSG_FAILURE([libmysqlclient not found ! (--without-mysql to disable MySQL support)])
+    else
+        CFLAGS="$CFLAGS $MYSQL_CFLAGS"
+        LDFLAGS="$LDFLAGS $MYSQL_LDFLAGS"
+    fi
+fi
+
+
+AM_CONDITIONAL([HAS_CSV], [test x"csv" != x"no"] )
+AM_CONDITIONAL([HAS_MYSQL], [test x"mysql" != x"no"] )
+AM_CONDITIONAL([HAS_UDP], [test x"udp" != x"no"] )
+
+
+AC_CONFIG_FILES([Makefile
+                 src/Makefile
+                 src/csv_backend/Makefile
+                 src/mysql_backend/Makefile
+                 src/udp_backend/Makefile])
+AC_OUTPUT

src/Makefile.am

@@ -0,0 +1,19 @@
+SUBDIRS = 
+lib_LTLIBRARIES = libsmartrecords.la
+libsmartrecords_la_SOURCES = smart_records.c
+libsmartrecords_la_LIBADD = 
+
+if HAS_MYSQL
+SUBDIRS += mysql_backend
+libsmartrecords_la_LIBADD += mysql_backend/libmysql_backend.la
+endif
+
+if HAS_UDP
+SUBDIRS += udp_backend
+libsmartrecords_la_LIBADD += udp_backend/libudp_backend.la
+endif
+
+if HAS_CSV
+SUBDIRS += csv_backend
+libsmartrecords_la_LIBADD += csv_backend/libcsv_backend.la
+endif

src/Makefile.old

@@ -0,0 +1,16 @@
+CFLAGS=-D_WITH_INTERACTIVE_TERMINAL -ggdb -Wall
+
+smart_records_standalone: smart_records.c mysql_backend/mysql_backend.a csv_backend/csv_backend.a
+	$(CC) $(CFLAGS) -D_HAS_MYSQL -D_HAS_CSV -D_HAS_UDP `pkg-config --cflags --libs mysqlclient` -o $@ $?
+
+mysql_backend/mysql_backend.a:
+	$(MAKE) -C mysql_backend mysql_backend.a
+
+csv_backend/csv_backend.a:
+	$(MAKE) -C csv_backend csv_backend.a
+	
+clean:
+	rm -rf *.o smart_records_standalone
+	make -C mysql_backend clean
+	make -C csv_backend clean
+

src/csv_backend/Makefile.am

@@ -0,0 +1,2 @@
+noinst_LTLIBRARIES = libcsv_backend.la
+libcsv_backend_la_SOURCES = csv_backend.c

src/csv_backend/Makefile.old

@@ -0,0 +1,15 @@
+CFLAGS=-ggdb -Wall
+
+all: test csv_backend.a
+
+clean:
+	rm -f *.o *.a csv_backend_test
+
+test: csv_backend_test
+
+csv_backend.a: csv_backend.o 
+	$(AR) -rcv $@ $?
+
+csv_backend_test: csv_backend.c 
+	$(CC) $(CFLAGS) -D_TEST -o $@ $?
+

src/csv_backend/csv_backend.c

@@ -0,0 +1,179 @@
+/*
+Copyright (c) 2020 Gérald Colangelo <gcolangelo@ospow.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include "../smart_records_internals.h"
+#include "csv_backend_internals.h"
+
+void *csv_backend_init(char **error)
+{
+    csv_backend_ctx_t *ctx=NULL;
+    ctx = malloc(sizeof(csv_backend_ctx_t));
+    memset(ctx, 0, sizeof(csv_backend_ctx_t));
+	ctx->mode = 0644;
+	ctx->fmt = NULL;
+	ctx->pathname = NULL;
+    return ctx;
+}
+
+int csv_backend_open_records_base(void *ctx, char **error, const char *uri)
+{
+    csv_backend_ctx_t *c;
+    if (!ctx || !uri) {
+        set_error_and_fails("invalid arguments while opening records base");
+    }
+    c = (csv_backend_ctx_t *)ctx;
+
+	// XXX: Implement mode parsing example: csv://<filename>:<mode>
+	c->pathname = strdup(strchr(uri,':')+1);
+	c->fd = open(c->pathname, O_CREAT|O_APPEND|O_WRONLY, c->mode);
+	if (c->fd < 0) {
+		/* And then, we're not POSIX anymore */
+#define _GNU_SOURCE
+		asprintf(error,"failed opening CSV file: %s", strerror(errno));
+		goto failed;
+	}
+    return 0;
+failed:
+    return -1;
+}
+
+int csv_backend_set_format(void *ctx, char **error, const char *fmt)
+{
+    csv_backend_ctx_t *c;
+    if (!ctx || !fmt) {
+        set_error_and_fails("invalid parameters while setting format.")
+    }
+    c = (csv_backend_ctx_t *) ctx;
+    c->fmt = strdup(fmt);
+    return 0;
+failed:
+    return -1;
+}
+
+int csv_backend_write_record(void *ctx, char **error, ...)
+{
+    csv_backend_ctx_t *c;
+    int size=0;
+    va_list ap;
+
+    if (!ctx) {
+        set_error_and_fails("invalid parameters while setting format.")
+    }
+    c = (csv_backend_ctx_t *) ctx;
+
+    if (!c->fmt) {
+        set_error_and_fails("no format provided, please set it before writing any record");
+    }
+
+    va_start(ap,error);
+    size = vsnprintf(NULL, size, c->fmt, ap);
+    va_end(ap);
+
+    va_start(ap,error);
+    if (vdprintf(c->fd, c->fmt, ap) != size) {
+        set_error_and_fails("vdprintf() failed");
+    }
+    va_end(ap);
+
+    return 0;
+failed:
+    return -1;
+}
+
+int csv_backend_close_records_base(void *ctx)
+{
+    csv_backend_ctx_t *c;
+    if(!ctx)
+        return -1;
+    c = (csv_backend_ctx_t *)ctx;
+
+	if(c->fd > 0)
+		close(c->fd);
+    if(c->pathname)
+        free(c->pathname);
+    if(c->fmt)
+        free(c->fmt);
+    free(c);
+
+    return 0;
+}
+
+
+
+#ifdef _TEST
+
+#define dump_error_and_quit(func,error) \
+        { \
+            if (error) { \
+                fprintf(stderr, "[ERROR] %s(): %s\n", func, error); \
+            } else { \
+                fprintf(stderr, "[ERROR] %s(): unknown error\n", func); \
+            } \
+            free(error); \
+            exit(EXIT_FAILURE); \
+        }
+
+
+int main(int ac, char **av)
+{
+    void *ctx;
+    char *error=NULL;
+    int i=0;
+
+    if(ac != 2) {
+        printf("Usage: %s <mysql_uri>\n \
+            mysql_uri format is mysql://user[:password]@host[:port]/database.table\n \
+            database shall exists and table must obey the following scheme:\n \
+            CREATE TABLE <table> (a INT, b INT, c VARCHAR(40))\n",av[0]);
+        exit(EXIT_FAILURE);
+    }
+
+    ctx = csv_backend_init(&error);
+    if (ctx == NULL) {
+        dump_error_and_quit("csv_backend_init", error);
+    }
+
+    if (csv_backend_set_format(ctx, &error, "%d;%d;%s;\n") < 0){
+        dump_error_and_quit("csv_backend_set_format", error);
+    }
+
+    if(csv_backend_open_records_base(ctx, &error, av[1]) < 0) {
+        dump_error_and_quit("csv_backend_set_open_records_base", error);
+    }
+
+    for (i=0; i<4; i++) {
+        if (csv_backend_write_record(ctx, &error, i, i+10, "Text here") <0 ){
+            dump_error_and_quit("csv_backend_write_record", error);
+        }
+    }
+    csv_backend_close_records_base(ctx);
+}
+#endif

src/csv_backend/csv_backend.h

@@ -0,0 +1,13 @@
+#ifndef _SMART_RECORDS_CSV_BACKEND_H
+#define _SMART_RECORDS_CSV_BACKEND_H
+
+#include <stdarg.h>
+
+
+void *csv_backend_init(char **error);
+int csv_backend_open_records_base(void *ctx, char **error, const char *uri);
+int csv_backend_write_record(void *ctx, char **error, va_list ap);
+int csv_backend_set_format(void *ctx, char  **error, const char *format);
+int csv_backend_close_records_base(void *ctx);
+
+#endif

src/csv_backend/csv_backend_internals.h

@@ -0,0 +1,11 @@
+#ifndef CSV_BACKEND_INTERNALS_H
+#define CSV_BACKEND_INTERNALS_H
+
+typedef struct csv_backend_ctx_t {
+	int fd;
+	char *pathname;
+	char *fmt;
+	int mode;
+} csv_backend_ctx_t;
+
+#endif

src/mysql_backend/Makefile

@@ -1,18 +0,0 @@
-CFLAGS="-D_WITH_INTERACTIVE_TERMINAL -ggdb -Wall"
-
-all: test
-
-clean:
-	rm -f *.o mysql_backend_test
-
-test: mysql_backend_test
-
-mysql_backend.o: mysql_backend.c
-	$(CC) $(CFLAGS) `pkg-config --cflags mysqlclient` -c -o $@ $?
-
-mysql_backend_utils.o: mysql_backend_utils.c
-	$(CC) $(CFLAGS) `pkg-config --cflags mysqlclient` -c -o $@ $?
-
-mysql_backend_test: mysql_backend.o mysql_backend_utils.o
-	$(CC) $(CFLAGS) -D_TEST -D_WITH_INTERACTIVE_TERMINAL `pkg-config --cflags --libs mysqlclient` -o $@ $?
-

src/mysql_backend/Makefile.am

@@ -0,0 +1,2 @@
+noinst_LTLIBRARIES = libmysql_backend.la
+libmysql_backend_la_SOURCES = mysql_backend.c mysql_backend_utils.c

src/mysql_backend/Makefile.old

@@ -0,0 +1,16 @@
+CFLAGS=-D_WITH_INTERACTIVE_TERMINAL `pkg-config --cflags mysqlclient` -ggdb -Wall
+LDFLAGS=`pkg-config --libs mysqlclient`
+
+all: test mysql_backend.a
+
+clean:
+	rm -f *.o *.a mysql_backend_test
+
+test: mysql_backend_test
+
+mysql_backend.a: mysql_backend.o mysql_backend_utils.o
+	$(AR) -rcv $@ $?
+
+mysql_backend_test: mysql_backend.c mysql_backend_utils.c
+	$(CC) $(CFLAGS) -D_TEST `pkg-config --cflags --libs mysqlclient` -o $@ $?
+

src/mysql_backend/mysql_backend.c

@@ -26,6 +26,15 @@ SOFTWARE.
 #include "../smart_records_internals.h"
 #include "mysql_backend_internals.h"
 
+void *mysql_backend_init(char **error)
+{
+    mysql_backend_ctx_t *ctx=NULL;
+    ctx = malloc(sizeof(mysql_backend_ctx_t));
+    memset(ctx, 0, sizeof(mysql_backend_ctx_t));
+    ctx->mysql_obj = mysql_init(NULL);
+    return ctx;
+}
+
 int mysql_backend_open_records_base(void *ctx, char **error, const char *uri)
 {
     mysql_backend_ctx_t *c;
@@ -34,7 +43,6 @@ int mysql_backend_open_records_base(void *ctx, char **error, const char *uri)
     }
         
     c = (mysql_backend_ctx_t *)ctx;
-
 	c->uri = mysql_parse_uri(error, uri);
 	if (!c->uri)
         goto failed;
@@ -44,18 +52,133 @@ int mysql_backend_open_records_base(void *ctx, char **error, const char *uri)
                         c->uri->db,
                         c->uri->port,
                         NULL,0)) {
+
         set_error_and_fails(mysql_error(c->mysql_obj));
     }
+    return 0;
 failed:
     if(c->uri)
         mysql_free_uri(c->uri);
     return -1;
 }
 
-void *mysql_backend_init(char **error)
+int mysql_backend_set_format(void *ctx, char **error, const char *fmt)
 {
-    mysql_backend_ctx_t *ctx;
+    mysql_backend_ctx_t *c;
-    ctx = malloc(sizeof(mysql_backend_ctx_t));
+    if (!ctx || !fmt) {
-    ctx->mysql_obj = mysql_init(NULL);	
+        set_error_and_fails("invalid parameters while setting format.")
-    return ctx;
+    }
+    c = (mysql_backend_ctx_t *) ctx;
+    c->fmt = strdup(fmt);
+    return 0;
+failed:
+    return -1;
 }
+
+int mysql_backend_write_record(void *ctx, char **error, ...)
+{
+    mysql_backend_ctx_t *c;
+    char *record = NULL;
+    int size=0;
+    va_list ap;
+
+    if (!ctx) {
+        set_error_and_fails("invalid parameters while setting format.")
+    }
+    c = (mysql_backend_ctx_t *) ctx;
+
+    if (!c->fmt) {
+        set_error_and_fails("no format provided, please set it before writing any record");
+    }
+
+    va_start(ap,error);
+    size = vsnprintf(NULL, size, c->fmt, ap);
+    va_end(ap);
+
+    va_start(ap,error);
+    record = malloc(sizeof(char) * (size+1));
+    if (vsnprintf(record, size, c->fmt, ap) != size) {
+        set_error_and_fails("request prepation failed: check your format")
+    }
+    va_end(ap);
+
+    printf("--> %s\n", record);
+    if (mysql_query(c->mysql_obj, record) != 0) {
+        set_error_and_fails(mysql_error(c->mysql_obj))
+    }
+    free(record);
+    return 0;
+failed:
+    if(record)
+        free(record);
+    return -1;
+}
+
+int mysql_backend_close_records_base(void *ctx)
+{
+    mysql_backend_ctx_t *c;
+    if(!ctx)
+        return -1;
+    c = (mysql_backend_ctx_t *)ctx;
+
+    mysql_close(c->mysql_obj);
+    if(c->uri)
+        mysql_free_uri(c->uri);
+    if(c->fmt)
+        free(c->fmt);
+    free(c);
+
+    return 0;
+}
+
+
+
+#ifdef _TEST
+
+#define dump_error_and_quit(func,error) \
+        { \
+            if (error) { \
+                fprintf(stderr, "[ERROR] %s(): %s\n", func, error); \
+            } else { \
+                fprintf(stderr, "[ERROR] %s(): unknown error\n", func); \
+            } \
+            free(error); \
+            exit(EXIT_FAILURE); \
+        }
+
+
+int main(int ac, char **av)
+{
+    void *ctx;
+    char *error=NULL;
+    int i=0;
+
+    if(ac != 2) {
+        printf("Usage: %s <mysql_uri>\n \
+            mysql_uri format is mysql://user[:password]@host[:port]/database.table\n \
+            database shall exists and table must obey the following scheme:\n \
+            CREATE TABLE <table> (a INT, b INT, c VARCHAR(40))\n",av[0]);
+        exit(EXIT_FAILURE);
+    }
+
+    ctx = mysql_backend_init(&error);
+    if (ctx == NULL) {
+        dump_error_and_quit("mysql_backend_init", error);
+    }
+
+    if (mysql_backend_set_format(ctx, &error, "INSERT INTO test (a,b,c) VALUES (%d,%d,\"%s\");") < 0){
+        dump_error_and_quit("mysql_backend_set_format", error);
+    }
+
+    if(mysql_backend_open_records_base(ctx, &error, av[1]) < 0) {
+        dump_error_and_quit("mysql_backend_set_open_records_base", error);
+    }
+
+    for (i=0; i<4; i++) {
+        if (mysql_backend_write_record(ctx, &error, i, i+10, "Text here") <0 ){
+            dump_error_and_quit("mysql_backend_write_record", error);
+        }
+    }
+    mysql_backend_close_records_base(ctx);
+}
+#endif

src/mysql_backend/mysql_backend.h

@@ -6,8 +6,8 @@
 
 void *mysql_backend_init(char **error);
 int mysql_backend_open_records_base(void *ctx, char **error, const char *uri);
-int mysql_backend_write_record(void **ctx, char **error, va_list ap);
+int mysql_backend_write_record(void *ctx, char **error, va_list ap);
-int mysql_backend_set_format(void **ctx, char  **error, char *format);
+int mysql_backend_set_format(void *ctx, char  **error, const char *format);
-int mysql_backend_close_records_base(void **ctx);
+int mysql_backend_close_records_base(void *ctx);
 
 #endif

src/mysql_backend/mysql_backend_internals.h

@@ -16,6 +16,7 @@ typedef struct mysql_uri {
 typedef struct mysql_backend_ctx_t {
     MYSQL *mysql_obj;
     mysql_uri_t *uri;
+    char *fmt;
 } mysql_backend_ctx_t;
 
 

src/mysql_backend/mysql_backend_utils.c

@@ -122,7 +122,7 @@ failed:
     return NULL;
 }
 
-#ifdef _TEST
+#ifdef _TEST_URI
 char *tests[7][2] = {
     { "Every info provided",
      "mysql://leon:bruxelles@lafrite:1024/STOCK_PATATE.avril" },

src/smart_records.c

@@ -6,19 +6,19 @@
 #include "smart_records_internals.h"
 
 #ifdef _HAS_MYSQL
-#include "mysql_backend.h"
+#include "mysql_backend/mysql_backend.h"
 #endif
 
 #ifdef _HAS_SQLITE
-#include "sqlite_backend.h"
+//#include "sqlite_backend.h"
 #endif
 
 #ifdef _HAS_UDP
-#include "udp_backend.h"
+#include "udp_backend/udp_backend.h"
 #endif
 
 #ifdef _HAS_CSV
-#include "csv_backend.h"
+#include "csv_backend/csv_backend.h"
 #endif
 
 
@@ -42,34 +42,42 @@ int smart_records_open_base(smart_records_ctx_t *ctx, char **error, const char *
         ctx->write_record = mysql_backend_write_record;
         ctx->set_format = mysql_backend_set_format;
         ctx->close_records_base = mysql_backend_close_records_base;
-        if ((ctx->backend_ctx = mysql_backend_init(error) == NULL)
+        if (!(ctx->backend_ctx = mysql_backend_init(error)))
             goto failed;
 #else
         set_error_and_fails("built without support for mysql:// URIs");
-        goto failed;
 #endif
     }
 
-    else if(!strncmp("sqlite://", uri, len_uri < 9 ? len_uri : 9)) {
-#ifdef _HAS_SQLITE
-#else
-        set_error_and_fails("built without support for sqlite:// URIs");
-    }
-#endif
-
     else if(!strncmp("udp://", uri, len_uri < 8 ? len_uri : 8)) {
 #ifdef _HAS_UDP
+        ctx->backend_ctx = NULL;
+        ctx->write_record = udp_backend_write_record;
+        ctx->set_format = udp_backend_set_format;
+        ctx->close_records_base = udp_backend_close_records_base;
+        if (!(ctx->backend_ctx = udp_backend_init(error)))
+            goto failed;
 #else
         set_error_and_fails("built without support for udp:// URIs");
-    }
 #endif
+    }
 
     else if(!strncmp("csv://", uri, len_uri < 8 ? len_uri : 8)) {
 #ifdef _HAS_CSV
+        ctx->backend_ctx = NULL;
+        ctx->write_record = csv_backend_write_record;
+        ctx->set_format = csv_backend_set_format;
+        ctx->close_records_base = csv_backend_close_records_base;
+        if (!(ctx->backend_ctx = csv_backend_init(error)))
+            goto failed;
 #else
         set_error_and_fails("built without suppor fort csv:// URIs");
 #endif
     }
+    else if(!strncmp("sqlite://", uri, len_uri < 9 ? len_uri : 9)) {
+        set_error_and_fails("support for sqlite:// URIs not yet implemented");
+    }
+
     else {
         set_error_and_fails("Unknown scheme or bad URI.");
         goto failed;
@@ -93,3 +101,9 @@ int smart_records_write(smart_records_ctx_t *ctx, char **error, va_list ap)
 {
     return ctx->write_record(ctx, error, ap);
 }
+
+int main(int ac, char **av)
+{
+    printf("coucou !\n");
+    return 0;
+}

src/smart_records_internals.h

@@ -7,10 +7,10 @@
 #define set_error_and_fails(x) { if (error) *error = strdup(x); goto failed; }
 
 typedef struct smart_records_ctx_t {
-    void *CTX;
+    void *backend_ctx;
-    int (*set_format) (struct smart_records_ctx_t *ctx, char **error, const char *fmt);
+    int (*set_format) (void *ctx, char **error, const char *fmt);
-    int (*write_record) (struct smart_records_ctx_t *ctx, char **error, va_list ap);
+    int (*write_record) (void *ctx, char **error, va_list ap);
-    int (*close_records_base) (struct smart_records_ctx_t *ctx);
+    int (*close_records_base) (void *ctx);
 } smart_records_ctx_t ;   
 
 #endif

src/udp_backend/Makefile.am

@@ -0,0 +1,2 @@
+noinst_LTLIBRARIES = libudp_backend.la
+libudp_backend_la_SOURCES = udp_backend.c

src/udp_backend/Makefile.old

@@ -0,0 +1,15 @@
+CFLAGS=-ggdb -Wall
+
+all: test udp_backend.a
+
+clean:
+	rm -f *.o *.a udp_backend_test
+
+test: udp_backend_test
+
+udp_backend.a: udp_backend.o 
+	$(AR) -rcv $@ $?
+
+udp_backend_test: udp_backend.c 
+	$(CC) $(CFLAGS) -D_TEST -o $@ $?
+

src/udp_backend/udp_backend.c

@@ -0,0 +1,192 @@
+/*
+Copyright (c) 2020 Gérald Colangelo <gcolangelo@ospow.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include "../smart_records_internals.h"
+#include "udp_backend_internals.h"
+
+void *udp_backend_init(char **error)
+{
+    udp_backend_ctx_t *ctx=NULL;
+    ctx = malloc(sizeof(udp_backend_ctx_t));
+    memset(ctx, 0, sizeof(udp_backend_ctx_t));
+    return ctx;
+}
+
+int udp_backend_open_records_base(void *ctx, char **error, const char *uri)
+{
+    udp_backend_ctx_t *c;
+    char *host;
+    int port, conv;
+    if (!ctx || !uri) {
+        set_error_and_fails("invalid arguments while opening records base");
+    }
+    c = (udp_backend_ctx_t *)ctx;
+
+	// URL is basically udp://host:port/
+    conv = sscanf(uri,"udp://%m[^:]:%d", &host, &port);
+    if(conv != 2) {
+        set_error_and_fails("bad URI");
+    }
+    if ((c->socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+        set_error_and_fails("failed creating UDP socket");
+    }
+    c->sa.sin_family = AF_INET;
+    c->sa.sin_port = htons(port);
+    // XXX: Implement both IP address and hostname as input
+    if (inet_aton(host, &(c->sa.sin_addr)) < 0) {
+        set_error_and_fails("failed creating sockaddr_in structure: did you provided a hostname?");
+    }
+    if (connect(c->socket, &c->sa, sizeof(struct sockaddr_in)) < 0) {
+        set_error_and_fails(strerror(errno));
+    }   
+    return 0;
+failed:
+    return -1;
+}
+
+int udp_backend_set_format(void *ctx, char **error, const char *fmt)
+{
+    udp_backend_ctx_t *c;
+    if (!ctx || !fmt) {
+        set_error_and_fails("invalid parameters while setting format.")
+    }
+    c = (udp_backend_ctx_t *) ctx;
+    c->fmt = strdup(fmt);
+    return 0;
+failed:
+    return -1;
+}
+
+int udp_backend_write_record(void *ctx, char **error, ...)
+{
+    udp_backend_ctx_t *c;
+    char *pkt;
+    int size=0, ret=0;
+    va_list ap;
+
+    if (!ctx) {
+        set_error_and_fails("invalid parameters while setting format.")
+    }
+    c = (udp_backend_ctx_t *) ctx;
+
+    if (!c->fmt) {
+        set_error_and_fails("no format provided, please set it before writing any record");
+    }
+
+    va_start(ap,error);
+    size = vsnprintf(NULL, size, c->fmt, ap);
+    va_end(ap);
+
+    va_start(ap,error);
+    pkt = malloc(sizeof(char) * (size +1));
+    if (vsprintf(pkt, c->fmt, ap) != size) {
+        set_error_and_fails("failed converting input to message");
+    }
+    va_end(ap);
+    if ((ret = write(c->socket, pkt, size)) != size) {
+        printf("--> ret=%d\n",ret);
+        set_error_and_fails( ret < 0 ? strerror(errno) : "Incomplete data sent");
+    }
+    free(pkt);
+    return 0;
+failed:
+    free(pkt);
+    return -1;
+}
+
+int udp_backend_close_records_base(void *ctx)
+{
+    udp_backend_ctx_t *c;
+    if(!ctx)
+        return -1;
+    c = (udp_backend_ctx_t *)ctx;
+
+	if(c->socket > 0)
+		close(c->socket);
+    if(c->fmt)
+        free(c->fmt);
+    free(c);
+
+    return 0;
+}
+
+
+
+#ifdef _TEST
+
+#define dump_error_and_quit(func,error) \
+        { \
+            if (error) { \
+                fprintf(stderr, "[ERROR] %s(): %s\n", func, error); \
+            } else { \
+                fprintf(stderr, "[ERROR] %s(): unknown error\n", func); \
+            } \
+            free(error); \
+            exit(EXIT_FAILURE); \
+        }
+
+
+int main(int ac, char **av)
+{
+    void *ctx;
+    char *error=NULL;
+    int i=0;
+
+    if(ac != 2) {
+        printf("Usage: %s <mysql_uri>\n \
+            mysql_uri format is mysql://user[:password]@host[:port]/database.table\n \
+            database shall exists and table must obey the following scheme:\n \
+            CREATE TABLE <table> (a INT, b INT, c VARCHAR(40))\n",av[0]);
+        exit(EXIT_FAILURE);
+    }
+
+    ctx = udp_backend_init(&error);
+    if (ctx == NULL) {
+        dump_error_and_quit("udp_backend_init", error);
+    }
+
+    if (udp_backend_set_format(ctx, &error, "%d;%d;%s;\n") < 0){
+        dump_error_and_quit("udp_backend_set_format", error);
+    }
+
+    if(udp_backend_open_records_base(ctx, &error, av[1]) < 0) {
+        dump_error_and_quit("udp_backend_set_open_records_base", error);
+    }
+
+    for (i=0; i<4; i++) {
+        if (udp_backend_write_record(ctx, &error, i, i+10, "Text here") <0 ){
+            dump_error_and_quit("udp_backend_write_record", error);
+        }
+    }
+    udp_backend_close_records_base(ctx);
+}
+#endif

src/udp_backend/udp_backend.h

@@ -0,0 +1,13 @@
+#ifndef _SMART_RECORDS_UDP_BACKEND_H
+#define _SMART_RECORDS_UDP_BACKEND_H
+
+#include <stdarg.h>
+
+
+void *udp_backend_init(char **error);
+int udp_backend_open_records_base(void *ctx, char **error, const char *uri);
+int udp_backend_write_record(void *ctx, char **error, va_list ap);
+int udp_backend_set_format(void *ctx, char  **error, const char *format);
+int udp_backend_close_records_base(void *ctx);
+
+#endif

src/udp_backend/udp_backend_internals.h

@@ -0,0 +1,10 @@
+#ifndef UDP_BACKEND_INTERNALS_H
+#define UDP_BACKEND_INTERNALS_H
+
+typedef struct udp_backend_ctx_t {
+    int socket;
+    struct sockaddr_in sa;
+	char *fmt;
+} udp_backend_ctx_t;
+
+#endif