MBED: ini config parser library

.from: http://mbed.org/users/rolf/programs/iniparser/gpdz46

XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXx dictionary.c XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXx

/*-------------------------------------------------------------------------*/
/**
   @file    dictionary.c
   @author    N. Devillard
   @date    Sep 2007
   @version    $Revision: 1.27 $
   @brief    Implements a dictionary for string variables.

   This module implements a simple dictionary object, i.e. a list
   of string/string associations. This object is useful to store e.g.
   informations retrieved from a configuration file (ini files).
*/
/*--------------------------------------------------------------------------*/

/*
    $Id: dictionary.c,v 1.27 2007-11-23 21:39:18 ndevilla Exp $
    $Revision: 1.27 $
*/
/*---------------------------------------------------------------------------
                                   Includes
 ---------------------------------------------------------------------------*/
#include "dictionary.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//#include <unistd.h>

/** Maximum value size for integers and doubles. */
#define MAXVALSZ    1024

/** Minimal allocated number of entries in a dictionary */
#define DICTMINSZ    128

/** Invalid key token */
#define DICT_INVALID_KEY    ((char*)-1)

/*---------------------------------------------------------------------------
                              Private functions
 ---------------------------------------------------------------------------*/

/* Doubles the allocated size associated to a pointer */
/* 'size' is the current allocated size. */
static void * mem_double(void * ptr, int size)
{
    void * newptr ;

    newptr = calloc(2*size, 1);
    if (newptr==NULL) {
        return NULL ;
    }
    memcpy(newptr, ptr, size);
    free(ptr);
    return newptr ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Duplicate a string
  @param    s String to duplicate
  @return   Pointer to a newly allocated string, to be freed with free()

  This is a replacement for strdup(). This implementation is provided
  for systems that do not have it.
 */
/*--------------------------------------------------------------------------*/
static char * xstrdup(char * s)
{
    char * t ;
    if (!s)
        return NULL ;
    t = (char *)malloc(strlen(s)+1) ;
    if (t) {
        strcpy(t,s);
    }
    return t ;
}

/*---------------------------------------------------------------------------
                              Function codes
 ---------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
/**
  @brief    Compute the hash key for a string.
  @param    key        Character string to use for key.
  @return    1 unsigned int on at least 32 bits.

  This hash function has been taken from an Article in Dr Dobbs Journal.
  This is normally a collision-free function, distributing keys evenly.
  The key is stored anyway in the struct so that collision can be avoided
  by comparing the key itself in last resort.
 */
/*--------------------------------------------------------------------------*/
unsigned dictionary_hash(char * key)
{
    int            len ;
    unsigned    hash ;
    int            i ;

    len = strlen(key);
    for (hash=0, i=0 ; i<len ; i++) {
        hash += (unsigned)key[i] ;
        hash += (hash<<10);
        hash ^= (hash>>6) ;
    }
    hash += (hash <<3);
    hash ^= (hash >>11);
    hash += (hash <<15);
    return hash ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Create a new dictionary object.
  @param    size    Optional initial size of the dictionary.
  @return    1 newly allocated dictionary objet.

  This function allocates a new dictionary object of given size and returns
  it. If you do not know in advance (roughly) the number of entries in the
  dictionary, give size=0.
 */
/*--------------------------------------------------------------------------*/
dictionary * dictionary_new(int size)
{
    dictionary    *    d ;

    /* If no size was specified, allocate space for DICTMINSZ */
    if (size<DICTMINSZ) size=DICTMINSZ ;

    if ((d = (dictionary *)calloc(1, sizeof(dictionary)))==0) {
        return NULL;
    }
    d->size = size ;
    d->val  = (char **)calloc(size, sizeof(char*));
    d->key  = (char **)calloc(size, sizeof(char*));
    d->hash = (unsigned int *)calloc(size, sizeof(unsigned));
    return d ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Delete a dictionary object
  @param    d    dictionary object to deallocate.
  @return    void

  Deallocate a dictionary object and all memory associated to it.
 */
/*--------------------------------------------------------------------------*/
void dictionary_del(dictionary * d)
{
    int        i ;

    if (d==NULL) return ;
    for (i=0 ; i<d->size ; i++) {
        if (d->key[i]!=NULL)
            free(d->key[i]);
        if (d->val[i]!=NULL)
            free(d->val[i]);
    }
    free(d->val);
    free(d->key);
    free(d->hash);
    free(d);
    return ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Get a value from a dictionary.
  @param    d        dictionary object to search.
  @param    key        Key to look for in the dictionary.
  @param    def     Default value to return if key not found.
  @return    1 pointer to internally allocated character string.

  This function locates a key in a dictionary and returns a pointer to its
  value, or the passed 'def' pointer if no such key can be found in
  dictionary. The returned character pointer points to data internal to the
  dictionary object, you should not try to free it or modify it.
 */
/*--------------------------------------------------------------------------*/
char * dictionary_get(dictionary * d, char * key, char * def)
{
    unsigned    hash ;
    int            i ;

    hash = dictionary_hash(key);
    for (i=0 ; i<d->size ; i++) {
        if (d->key[i]==NULL)
            continue ;
        /* Compare hash */
        if (hash==d->hash[i]) {
            /* Compare string, to avoid hash collisions */
            if (!strcmp(key, d->key[i])) {
                return d->val[i] ;
            }
        }
    }
    return def ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Set a value in a dictionary.
  @param    d       dictionary object to modify.
  @param    key     Key to modify or add.
  @param    val     Value to add.
  @return   int     0 if Ok, anything else otherwise

  If the given key is found in the dictionary, the associated value is
  replaced by the provided one. If the key cannot be found in the
  dictionary, it is added to it.

  It is Ok to provide a NULL value for val, but NULL values for the dictionary
  or the key are considered as errors: the function will return immediately
  in such a case.

  Notice that if you dictionary_set a variable to NULL, a call to
  dictionary_get will return a NULL value: the variable will be found, and
  its value (NULL) is returned. In other words, setting the variable
  content to NULL is equivalent to deleting the variable from the
  dictionary. It is not possible (in this implementation) to have a key in
  the dictionary without value.

  This function returns non-zero in case of failure.
 */
/*--------------------------------------------------------------------------*/
int dictionary_set(dictionary * d, char * key, char * val)
{
    int            i ;
    unsigned    hash ;

    if (d==NULL || key==NULL) return -1 ;
   
    /* Compute hash for this key */
    hash = dictionary_hash(key) ;
    /* Find if value is already in dictionary */
    if (d->n>0) {
        for (i=0 ; i<d->size ; i++) {
            if (d->key[i]==NULL)
                continue ;
            if (hash==d->hash[i]) { /* Same hash value */
                if (!strcmp(key, d->key[i])) {     /* Same key */
                    /* Found a value: modify and return */
                    if (d->val[i]!=NULL)
                        free(d->val[i]);
                    d->val[i] = val ? xstrdup(val) : NULL ;
                    /* Value has been modified: return */
                    return 0 ;
                }
            }
        }
    }
    /* Add a new value */
    /* See if dictionary needs to grow */
    if (d->n==d->size) {

        /* Reached maximum size: reallocate dictionary */
        d->val  = (char **)mem_double(d->val,  d->size * sizeof(char*)) ;
        d->key  = (char **)mem_double(d->key,  d->size * sizeof(char*)) ;
        d->hash = (unsigned int *)mem_double(d->hash, d->size * sizeof(unsigned)) ;
        if ((d->val==NULL) || (d->key==NULL) || (d->hash==NULL)) {
            /* Cannot grow dictionary */
            return -1 ;
        }
        /* Double size */
        d->size *= 2 ;
    }

    /* Insert key in the first empty slot */
    for (i=0 ; i<d->size ; i++) {
        if (d->key[i]==NULL) {
            /* Add key here */
            break ;
        }
    }
    /* Copy key */
    d->key[i]  = xstrdup(key);
    d->val[i]  = val ? xstrdup(val) : NULL ;
    d->hash[i] = hash;
    d->n ++ ;
    return 0 ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Delete a key in a dictionary
  @param    d        dictionary object to modify.
  @param    key        Key to remove.
  @return   void

  This function deletes a key in a dictionary. Nothing is done if the
  key cannot be found.
 */
/*--------------------------------------------------------------------------*/
void dictionary_unset(dictionary * d, char * key)
{
    unsigned    hash ;
    int            i ;

    if (key == NULL) {
        return;
    }

    hash = dictionary_hash(key);
    for (i=0 ; i<d->size ; i++) {
        if (d->key[i]==NULL)
            continue ;
        /* Compare hash */
        if (hash==d->hash[i]) {
            /* Compare string, to avoid hash collisions */
            if (!strcmp(key, d->key[i])) {
                /* Found key */
                break ;
            }
        }
    }
    if (i>=d->size)
        /* Key not found */
        return ;

    free(d->key[i]);
    d->key[i] = NULL ;
    if (d->val[i]!=NULL) {
        free(d->val[i]);
        d->val[i] = NULL ;
    }
    d->hash[i] = 0 ;
    d->n -- ;
    return ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Dump a dictionary to an opened file pointer.
  @param    d    Dictionary to dump
  @param    f    Opened file pointer.
  @return    void

  Dumps a dictionary onto an opened file pointer. Key pairs are printed out
  as @c [Key]=[Value], one per line. It is Ok to provide stdout or stderr as
  output file pointers.
 */
/*--------------------------------------------------------------------------*/
void dictionary_dump(dictionary * d, FILE * out)
{
    int        i ;

    if (d==NULL || out==NULL) return ;
    if (d->n<1) {
        fprintf(out, "empty dictionary\n");
        return ;
    }
    for (i=0 ; i<d->size ; i++) {
        if (d->key[i]) {
            fprintf(out, "%20s\t[%s]\n",
                    d->key[i],
                    d->val[i] ? d->val[i] : "UNDEF");
        }
    }
    return ;
}


/* Test code */
#ifdef TESTDIC
#define NVALS 20000
int main(int argc, char *argv[])
{
    dictionary    *    d ;
    char    *    val ;
    int            i ;
    char        cval[90] ;

    /* Allocate dictionary */
    printf("allocating...\n");
    d = dictionary_new(0);
   
    /* Set values in dictionary */
    printf("setting %d values...\n", NVALS);
    for (i=0 ; i<NVALS ; i++) {
        sprintf(cval, "%04d", i);
        dictionary_set(d, cval, "salut");
    }
    printf("getting %d values...\n", NVALS);
    for (i=0 ; i<NVALS ; i++) {
        sprintf(cval, "%04d", i);
        val = dictionary_get(d, cval, DICT_INVALID_KEY);
        if (val==DICT_INVALID_KEY) {
            printf("cannot get value for key [%s]\n", cval);
        }
    }
    printf("unsetting %d values...\n", NVALS);
    for (i=0 ; i<NVALS ; i++) {
        sprintf(cval, "%04d", i);
        dictionary_unset(d, cval);
    }
    if (d->n != 0) {
        printf("error deleting values\n");
    }
    printf("deallocating...\n");
    dictionary_del(d);
    return 0 ;
}
#endif
/* vim: set ts=4 et sw=4 tw=75 */

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/*-------------------------------------------------------------------------*/
/**
   @file    dictionary.h
   @author  N. Devillard
   @date    Sep 2007
   @version $Revision: 1.12 $
   @brief   Implements a dictionary for string variables.

   This module implements a simple dictionary object, i.e. a list
   of string/string associations. This object is useful to store e.g.
   informations retrieved from a configuration file (ini files).
*/
/*--------------------------------------------------------------------------*/

/*
    $Id: dictionary.h,v 1.12 2007-11-23 21:37:00 ndevilla Exp $
    $Author: ndevilla $
    $Date: 2007-11-23 21:37:00 $
    $Revision: 1.12 $
*/

#ifndef _DICTIONARY_H_
#define _DICTIONARY_H_

/*---------------------------------------------------------------------------
                                   Includes
 ---------------------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//#include <unistd.h>

/*---------------------------------------------------------------------------
                                   New types
 ---------------------------------------------------------------------------*/


/*-------------------------------------------------------------------------*/
/**
  @brief    Dictionary object

  This object contains a list of string/string associations. Each
  association is identified by a unique string key. Looking up values
  in the dictionary is speeded up by the use of a (hopefully collision-free)
  hash function.
 */
/*-------------------------------------------------------------------------*/
typedef struct _dictionary_ {
    int                n ;        /** Number of entries in dictionary */
    int                size ;    /** Storage size */
    char         **    val ;    /** List of string values */
    char         **  key ;    /** List of string keys */
    unsigned     *    hash ;    /** List of hash values for keys */
} dictionary ;


/*---------------------------------------------------------------------------
                              Function prototypes
 ---------------------------------------------------------------------------*/

/*-------------------------------------------------------------------------*/
/**
  @brief    Compute the hash key for a string.
  @param    key     Character string to use for key.
  @return   1 unsigned int on at least 32 bits.

  This hash function has been taken from an Article in Dr Dobbs Journal.
  This is normally a collision-free function, distributing keys evenly.
  The key is stored anyway in the struct so that collision can be avoided
  by comparing the key itself in last resort.
 */
/*--------------------------------------------------------------------------*/
unsigned dictionary_hash(char * key);

/*-------------------------------------------------------------------------*/
/**
  @brief    Create a new dictionary object.
  @param    size    Optional initial size of the dictionary.
  @return   1 newly allocated dictionary objet.

  This function allocates a new dictionary object of given size and returns
  it. If you do not know in advance (roughly) the number of entries in the
  dictionary, give size=0.
 */
/*--------------------------------------------------------------------------*/
dictionary * dictionary_new(int size);

/*-------------------------------------------------------------------------*/
/**
  @brief    Delete a dictionary object
  @param    d   dictionary object to deallocate.
  @return   void

  Deallocate a dictionary object and all memory associated to it.
 */
/*--------------------------------------------------------------------------*/
void dictionary_del(dictionary * vd);

/*-------------------------------------------------------------------------*/
/**
  @brief    Get a value from a dictionary.
  @param    d       dictionary object to search.
  @param    key     Key to look for in the dictionary.
  @param    def     Default value to return if key not found.
  @return   1 pointer to internally allocated character string.

  This function locates a key in a dictionary and returns a pointer to its
  value, or the passed 'def' pointer if no such key can be found in
  dictionary. The returned character pointer points to data internal to the
  dictionary object, you should not try to free it or modify it.
 */
/*--------------------------------------------------------------------------*/
char * dictionary_get(dictionary * d, char * key, char * def);


/*-------------------------------------------------------------------------*/
/**
  @brief    Set a value in a dictionary.
  @param    d       dictionary object to modify.
  @param    key     Key to modify or add.
  @param    val     Value to add.
  @return   int     0 if Ok, anything else otherwise

  If the given key is found in the dictionary, the associated value is
  replaced by the provided one. If the key cannot be found in the
  dictionary, it is added to it.

  It is Ok to provide a NULL value for val, but NULL values for the dictionary
  or the key are considered as errors: the function will return immediately
  in such a case.

  Notice that if you dictionary_set a variable to NULL, a call to
  dictionary_get will return a NULL value: the variable will be found, and
  its value (NULL) is returned. In other words, setting the variable
  content to NULL is equivalent to deleting the variable from the
  dictionary. It is not possible (in this implementation) to have a key in
  the dictionary without value.

  This function returns non-zero in case of failure.
 */
/*--------------------------------------------------------------------------*/
int dictionary_set(dictionary * vd, char * key, char * val);

/*-------------------------------------------------------------------------*/
/**
  @brief    Delete a key in a dictionary
  @param    d       dictionary object to modify.
  @param    key     Key to remove.
  @return   void

  This function deletes a key in a dictionary. Nothing is done if the
  key cannot be found.
 */
/*--------------------------------------------------------------------------*/
void dictionary_unset(dictionary * d, char * key);


/*-------------------------------------------------------------------------*/
/**
  @brief    Dump a dictionary to an opened file pointer.
  @param    d   Dictionary to dump
  @param    f   Opened file pointer.
  @return   void

  Dumps a dictionary onto an opened file pointer. Key pairs are printed out
  as @c [Key]=[Value], one per line. It is Ok to provide stdout or stderr as
  output file pointers.
 */
/*--------------------------------------------------------------------------*/
void dictionary_dump(dictionary * d, FILE * out);

#endif

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/*-------------------------------------------------------------------------*/
/**
   @file    iniparser.c
   @author  N. Devillard
   @date    Sep 2007
   @version 3.0
   @brief   Parser for ini files.
*/
/*--------------------------------------------------------------------------*/
/*
    $Id: iniparser.c,v 2.18 2008-01-03 18:35:39 ndevilla Exp $
    $Revision: 2.18 $
    $Date: 2008-01-03 18:35:39 $
*/
/*---------------------------- Includes ------------------------------------*/
#include <ctype.h>
#include "iniparser.h"

/*---------------------------- Defines -------------------------------------*/
#define ASCIILINESZ         (1024)
#define INI_INVALID_KEY     ((char*)-1)

/*---------------------------------------------------------------------------
                        Private to this module
 ---------------------------------------------------------------------------*/
/**
 * This enum stores the status for each parsed line (internal use only).
 */
typedef enum _line_status_ {
    LINE_UNPROCESSED,
    LINE_ERROR,
    LINE_EMPTY,
    LINE_COMMENT,
    LINE_SECTION,
    LINE_VALUE
} line_status ;

/*-------------------------------------------------------------------------*/
/**
  @brief    Convert a string to lowercase.
  @param    s    String to convert.
  @return    ptr to statically allocated string.

  This function returns a pointer to a statically allocated string
  containing a lowercased version of the input string. Do not free
  or modify the returned string! Since the returned string is statically
  allocated, it will be modified at each function call (not re-entrant).
 */
/*--------------------------------------------------------------------------*/
static char * strlwc(const char * s)
{
    static char l[ASCIILINESZ+1];
    int i ;

    if (s==NULL) return NULL ;
    memset(l, 0, ASCIILINESZ+1);
    i=0 ;
    while (s[i] && i<ASCIILINESZ) {
        l[i] = (char)tolower((int)s[i]);
        i++ ;
    }
    l[ASCIILINESZ]=(char)0;
    return l ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Remove blanks at the beginning and the end of a string.
  @param    s    String to parse.
  @return    ptr to statically allocated string.

  This function returns a pointer to a statically allocated string,
  which is identical to the input string, except that all blank
  characters at the end and the beg. of the string have been removed.
  Do not free or modify the returned string! Since the returned string
  is statically allocated, it will be modified at each function call
  (not re-entrant).
 */
/*--------------------------------------------------------------------------*/
static char * strstrip(char * s)
{
    static char l[ASCIILINESZ+1];
    char * last ;
  
    if (s==NULL) return NULL ;
  
    while (isspace((int)*s) && *s) s++;
    memset(l, 0, ASCIILINESZ+1);
    strcpy(l, s);
    last = l + strlen(l);
    while (last > l) {
        if (!isspace((int)*(last-1)))
            break ;
        last -- ;
    }
    *last = (char)0;
    return (char*)l ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Get number of sections in a dictionary
  @param    d   Dictionary to examine
  @return   int Number of sections found in dictionary

  This function returns the number of sections found in a dictionary.
  The test to recognize sections is done on the string stored in the
  dictionary: a section name is given as "section" whereas a key is
  stored as "section:key", thus the test looks for entries that do not
  contain a colon.

  This clearly fails in the case a section name contains a colon, but
  this should simply be avoided.

  This function returns -1 in case of error.
 */
/*--------------------------------------------------------------------------*/
int iniparser_getnsec(dictionary * d)
{
    int i ;
    int nsec ;

    if (d==NULL) return -1 ;
    nsec=0 ;
    for (i=0 ; i<d->size ; i++) {
        if (d->key[i]==NULL)
            continue ;
        if (strchr(d->key[i], ':')==NULL) {
            nsec ++ ;
        }
    }
    return nsec ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Get name for section n in a dictionary.
  @param    d   Dictionary to examine
  @param    n   Section number (from 0 to nsec-1).
  @return   Pointer to char string

  This function locates the n-th section in a dictionary and returns
  its name as a pointer to a string statically allocated inside the
  dictionary. Do not free or modify the returned string!

  This function returns NULL in case of error.
 */
/*--------------------------------------------------------------------------*/
char * iniparser_getsecname(dictionary * d, int n)
{
    int i ;
    int foundsec ;

    if (d==NULL || n<0) return NULL ;
    foundsec=0 ;
    for (i=0 ; i<d->size ; i++) {
        if (d->key[i]==NULL)
            continue ;
        if (strchr(d->key[i], ':')==NULL) {
            foundsec++ ;
            if (foundsec>n)
                break ;
        }
    }
    if (foundsec<=n) {
        return NULL ;
    }
    return d->key[i] ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Dump a dictionary to an opened file pointer.
  @param    d   Dictionary to dump.
  @param    f   Opened file pointer to dump to.
  @return   void

  This function prints out the contents of a dictionary, one element by
  line, onto the provided file pointer. It is OK to specify @c stderr
  or @c stdout as output files. This function is meant for debugging
  purposes mostly.
 */
/*--------------------------------------------------------------------------*/
void iniparser_dump(dictionary * d, FILE * f)
{
    int     i ;

    if (d==NULL || f==NULL) return ;
    for (i=0 ; i<d->size ; i++) {
        if (d->key[i]==NULL)
            continue ;
        if (d->val[i]!=NULL) {
            fprintf(f, "[%s]=[%s]\n", d->key[i], d->val[i]);
        } else {
            fprintf(f, "[%s]=UNDEF\n", d->key[i]);
        }
    }
    return ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Save a dictionary to a loadable ini file
  @param    d   Dictionary to dump
  @param    f   Opened file pointer to dump to
  @return   void

  This function dumps a given dictionary into a loadable ini file.
  It is Ok to specify @c stderr or @c stdout as output files.
 */
/*--------------------------------------------------------------------------*/
void iniparser_dump_ini(dictionary * d, FILE * f)
{
    int     i, j ;
    char    keym[ASCIILINESZ+1];
    int     nsec ;
    char *  secname ;
    int     seclen ;

    if (d==NULL || f==NULL) return ;

    nsec = iniparser_getnsec(d);
    if (nsec<1) {
        /* No section in file: dump all keys as they are */
        for (i=0 ; i<d->size ; i++) {
            if (d->key[i]==NULL)
                continue ;
            fprintf(f, "%s = %s\n", d->key[i], d->val[i]);
        }
        return ;
    }
    for (i=0 ; i<nsec ; i++) {
        secname = iniparser_getsecname(d, i) ;
        seclen  = (int)strlen(secname);
        fprintf(f, "\n[%s]\n", secname);
        sprintf(keym, "%s:", secname);
        for (j=0 ; j<d->size ; j++) {
            if (d->key[j]==NULL)
                continue ;
            if (!strncmp(d->key[j], keym, seclen+1)) {
                fprintf(f,
                        "%-30s = %s\n",
                        d->key[j]+seclen+1,
                        d->val[j] ? d->val[j] : "");
            }
        }
    }
    fprintf(f, "\n");
    return ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Get the string associated to a key
  @param    d       Dictionary to search
  @param    key     Key string to look for
  @param    def     Default value to return if key not found.
  @return   pointer to statically allocated character string

  This function queries a dictionary for a key. A key as read from an
  ini file is given as "section:key". If the key cannot be found,
  the pointer passed as 'def' is returned.
  The returned char pointer is pointing to a string allocated in
  the dictionary, do not free or modify it.
 */
/*--------------------------------------------------------------------------*/
char * iniparser_getstring(dictionary * d, const char * key, char * def)
{
    char * lc_key ;
    char * sval ;

    if (d==NULL || key==NULL)
        return def ;

    lc_key = strlwc(key);
    sval = dictionary_get(d, lc_key, def);
    return sval ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Get the string associated to a key, convert to an int
  @param    d Dictionary to search
  @param    key Key string to look for
  @param    notfound Value to return in case of error
  @return   integer

  This function queries a dictionary for a key. A key as read from an
  ini file is given as "section:key". If the key cannot be found,
  the notfound value is returned.

  Supported values for integers include the usual C notation
  so decimal, octal (starting with 0) and hexadecimal (starting with 0x)
  are supported. Examples:

  "42"      ->  42
  "042"     ->  34 (octal -> decimal)
  "0x42"    ->  66 (hexa  -> decimal)

  Warning: the conversion may overflow in various ways. Conversion is
  totally outsourced to strtol(), see the associated man page for overflow
  handling.

  Credits: Thanks to A. Becker for suggesting strtol()
 */
/*--------------------------------------------------------------------------*/
int iniparser_getint(dictionary * d, const char * key, int notfound)
{
    char    *   str ;

    str = iniparser_getstring(d, key, INI_INVALID_KEY);
    if (str==INI_INVALID_KEY) return notfound ;
    return (int)strtol(str, NULL, 0);
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Get the string associated to a key, convert to a double
  @param    d Dictionary to search
  @param    key Key string to look for
  @param    notfound Value to return in case of error
  @return   double

  This function queries a dictionary for a key. A key as read from an
  ini file is given as "section:key". If the key cannot be found,
  the notfound value is returned.
 */
/*--------------------------------------------------------------------------*/
double iniparser_getdouble(dictionary * d, char * key, double notfound)
{
    char    *   str ;

    str = iniparser_getstring(d, key, INI_INVALID_KEY);
    if (str==INI_INVALID_KEY) return notfound ;
    return atof(str);
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Get the string associated to a key, convert to a boolean
  @param    d Dictionary to search
  @param    key Key string to look for
  @param    notfound Value to return in case of error
  @return   integer

  This function queries a dictionary for a key. A key as read from an
  ini file is given as "section:key". If the key cannot be found,
  the notfound value is returned.

  A true boolean is found if one of the following is matched:

  - A string starting with 'y'
  - A string starting with 'Y'
  - A string starting with 't'
  - A string starting with 'T'
  - A string starting with '1'

  A false boolean is found if one of the following is matched:

  - A string starting with 'n'
  - A string starting with 'N'
  - A string starting with 'f'
  - A string starting with 'F'
  - A string starting with '0'

  The notfound value returned if no boolean is identified, does not
  necessarily have to be 0 or 1.
 */
/*--------------------------------------------------------------------------*/
int iniparser_getboolean(dictionary * d, const char * key, int notfound)
{
    char    *   c ;
    int         ret ;

    c = iniparser_getstring(d, key, INI_INVALID_KEY);
    if (c==INI_INVALID_KEY) return notfound ;
    if (c[0]=='y' || c[0]=='Y' || c[0]=='1' || c[0]=='t' || c[0]=='T') {
        ret = 1 ;
    } else if (c[0]=='n' || c[0]=='N' || c[0]=='0' || c[0]=='f' || c[0]=='F') {
        ret = 0 ;
    } else {
        ret = notfound ;
    }
    return ret;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Finds out if a given entry exists in a dictionary
  @param    ini     Dictionary to search
  @param    entry   Name of the entry to look for
  @return   integer 1 if entry exists, 0 otherwise

  Finds out if a given entry exists in the dictionary. Since sections
  are stored as keys with NULL associated values, this is the only way
  of querying for the presence of sections in a dictionary.
 */
/*--------------------------------------------------------------------------*/
int iniparser_find_entry(
    dictionary  *   ini,
    char        *   entry
)
{
    int found=0 ;
    if (iniparser_getstring(ini, entry, INI_INVALID_KEY)!=INI_INVALID_KEY) {
        found = 1 ;
    }
    return found ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Set an entry in a dictionary.
  @param    ini     Dictionary to modify.
  @param    entry   Entry to modify (entry name)
  @param    val     New value to associate to the entry.
  @return   int 0 if Ok, -1 otherwise.

  If the given entry can be found in the dictionary, it is modified to
  contain the provided value. If it cannot be found, -1 is returned.
  It is Ok to set val to NULL.
 */
/*--------------------------------------------------------------------------*/
int iniparser_set(dictionary * ini, char * entry, char * val)
{
    return dictionary_set(ini, strlwc(entry), val) ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Delete an entry in a dictionary
  @param    ini     Dictionary to modify
  @param    entry   Entry to delete (entry name)
  @return   void

  If the given entry can be found, it is deleted from the dictionary.
 */
/*--------------------------------------------------------------------------*/
void iniparser_unset(dictionary * ini, char * entry)
{
    dictionary_unset(ini, strlwc(entry));
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Load a single line from an INI file
  @param    input_line  Input line, may be concatenated multi-line input
  @param    section     Output space to store section
  @param    key         Output space to store key
  @param    value       Output space to store value
  @return   line_status value
 */
/*--------------------------------------------------------------------------*/
static line_status iniparser_line(
    char * input_line,
    char * section,
    char * key,
    char * value)
{ 
    line_status sta ;
    char        line[ASCIILINESZ+1];
    int         len ;

    strcpy(line, strstrip(input_line));
    len = (int)strlen(line);

    sta = LINE_UNPROCESSED ;
    if (len<1) {
        /* Empty line */
        sta = LINE_EMPTY ;
    } else if (line[0]=='#') {
        /* Comment line */
        sta = LINE_COMMENT ;
    } else if (line[0]=='[' && line[len-1]==']') {
        /* Section name */
        sscanf(line, "[%[^]]", section);
        strcpy(section, strstrip(section));
        strcpy(section, strlwc(section));
        sta = LINE_SECTION ;
    } else if (sscanf (line, "%[^=] = \"%[^\"]\"", key, value) == 2
           ||  sscanf (line, "%[^=] = '%[^\']'",   key, value) == 2
           ||  sscanf (line, "%[^=] = %[^;#]",     key, value) == 2) {
        /* Usual key=value, with or without comments */
        strcpy(key, strstrip(key));
        strcpy(key, strlwc(key));
        strcpy(value, strstrip(value));
        /*
         * sscanf cannot handle '' or "" as empty values
         * this is done here
         */
        if (!strcmp(value, "\"\"") || (!strcmp(value, "''"))) {
            value[0]=0 ;
        }
        sta = LINE_VALUE ;
    } else if (sscanf(line, "%[^=] = %[;#]", key, value)==2
           ||  sscanf(line, "%[^=] %[=]", key, value) == 2) {
        /*
         * Special cases:
         * key=
         * key=;
         * key=#
         */
        strcpy(key, strstrip(key));
        strcpy(key, strlwc(key));
        value[0]=0 ;
        sta = LINE_VALUE ;
    } else {
        /* Generate syntax error */
        sta = LINE_ERROR ;
    }
    return sta ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Parse an ini file and return an allocated dictionary object
  @param    ininame Name of the ini file to read.
  @return   Pointer to newly allocated dictionary

  This is the parser for ini files. This function is called, providing
  the name of the file to be read. It returns a dictionary object that
  should not be accessed directly, but through accessor functions
  instead.

  The returned dictionary must be freed using iniparser_freedict().
 */
/*--------------------------------------------------------------------------*/
dictionary * iniparser_load(const char * ininame)
{
    FILE * in ;

    char line    [ASCIILINESZ+1] ;
    char section [ASCIILINESZ+1] ;
    char key     [ASCIILINESZ+1] ;
    char tmp     [ASCIILINESZ+1] ;
    char val     [ASCIILINESZ+1] ;

    int  last=0 ;
    int  len ;
    int  lineno=0 ;
    int  errs=0;

    dictionary * dict ;

    if ((in=fopen(ininame, "r"))==NULL) {
        fprintf(stderr, "iniparser: cannot open %s\n", ininame);
        return NULL ;
    }

    dict = dictionary_new(0) ;
    if (!dict) {
        fclose(in);
        return NULL ;
    }

    memset(line,    0, ASCIILINESZ);
    memset(section, 0, ASCIILINESZ);
    memset(key,     0, ASCIILINESZ);
    memset(val,     0, ASCIILINESZ);
    last=0 ;

    while (fgets(line+last, ASCIILINESZ-last, in)!=NULL) {
        lineno++ ;
        len = (int)strlen(line)-1;
        /* Safety check against buffer overflows */
        if (line[len]!='\n') {
            fprintf(stderr,
                    "iniparser: input line too long in %s (%d)\n",
                    ininame,
                    lineno);
            dictionary_del(dict);
            fclose(in);
            return NULL ;
        }
        /* Get rid of \n and spaces at end of line */
        while ((len>=0) &&
                ((line[len]=='\n') || (isspace(line[len])))) {
            line[len]=0 ;
            len-- ;
        }
        /* Detect multi-line */
        if (line[len]=='\\') {
            /* Multi-line value */
            last=len ;
            continue ;
        } else {
            last=0 ;
        }
        switch (iniparser_line(line, section, key, val)) {
            case LINE_EMPTY:
            case LINE_COMMENT:
            break ;

            case LINE_SECTION:
            errs = dictionary_set(dict, section, NULL);
            break ;

            case LINE_VALUE:
            sprintf(tmp, "%s:%s", section, key);
            errs = dictionary_set(dict, tmp, val) ;
            break ;

            case LINE_ERROR:
            fprintf(stderr, "iniparser: syntax error in %s (%d):\n",
                    ininame,
                    lineno);
            fprintf(stderr, "-> %s\n", line);
            errs++ ;
            break;

            default:
            break ;
        }
        memset(line, 0, ASCIILINESZ);
        last=0;
        if (errs<0) {
            fprintf(stderr, "iniparser: memory allocation failure\n");
            break ;
        }
    }
    if (errs) {
        dictionary_del(dict);
        dict = NULL ;
    }
    fclose(in);
    return dict ;
}

/*-------------------------------------------------------------------------*/
/**
  @brief    Free all memory associated to an ini dictionary
  @param    d Dictionary to free
  @return   void

  Free all memory associated to an ini dictionary.
  It is mandatory to call this function before the dictionary object
  gets out of the current context.
 */
/*--------------------------------------------------------------------------*/
void iniparser_freedict(dictionary * d)
{
    dictionary_del(d);
}

/* vim: set ts=4 et sw=4 tw=75 */

XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXx iniparser.h XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXx

/*-------------------------------------------------------------------------*/
/**
   @file    iniparser.h
   @author  N. Devillard
   @date    Sep 2007
   @version 3.0
   @brief   Parser for ini files.
*/
/*--------------------------------------------------------------------------*/

/*
    $Id: iniparser.h,v 1.24 2007-11-23 21:38:19 ndevilla Exp $
    $Revision: 1.24 $
*/

#ifndef _INIPARSER_H_
#define _INIPARSER_H_

/*---------------------------------------------------------------------------
                                   Includes
 ---------------------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/*
 * The following #include is necessary on many Unixes but not Linux.
 * It is not needed for Windows platforms.
 * Uncomment it if needed.
 */
/* #include <unistd.h> */

#include "dictionary.h"

/*---------------------------------------------------------------------------
                                   Macros
 ---------------------------------------------------------------------------*/
/** For backwards compatibility only */
#define iniparser_getstr(d, k)  iniparser_getstring(d, k, NULL)
#define iniparser_setstr        iniparser_setstring

/*-------------------------------------------------------------------------*/
/**
  @brief    Get number of sections in a dictionary
  @param    d   Dictionary to examine
  @return   int Number of sections found in dictionary

  This function returns the number of sections found in a dictionary.
  The test to recognize sections is done on the string stored in the
  dictionary: a section name is given as "section" whereas a key is
  stored as "section:key", thus the test looks for entries that do not
  contain a colon.

  This clearly fails in the case a section name contains a colon, but
  this should simply be avoided.

  This function returns -1 in case of error.
 */
/*--------------------------------------------------------------------------*/

int iniparser_getnsec(dictionary * d);


/*-------------------------------------------------------------------------*/
/**
  @brief    Get name for section n in a dictionary.
  @param    d   Dictionary to examine
  @param    n   Section number (from 0 to nsec-1).
  @return   Pointer to char string

  This function locates the n-th section in a dictionary and returns
  its name as a pointer to a string statically allocated inside the
  dictionary. Do not free or modify the returned string!

  This function returns NULL in case of error.
 */
/*--------------------------------------------------------------------------*/

char * iniparser_getsecname(dictionary * d, int n);


/*-------------------------------------------------------------------------*/
/**
  @brief    Save a dictionary to a loadable ini file
  @param    d   Dictionary to dump
  @param    f   Opened file pointer to dump to
  @return   void

  This function dumps a given dictionary into a loadable ini file.
  It is Ok to specify @c stderr or @c stdout as output files.
 */
/*--------------------------------------------------------------------------*/

void iniparser_dump_ini(dictionary * d, FILE * f);

/*-------------------------------------------------------------------------*/
/**
  @brief    Dump a dictionary to an opened file pointer.
  @param    d   Dictionary to dump.
  @param    f   Opened file pointer to dump to.
  @return   void

  This function prints out the contents of a dictionary, one element by
  line, onto the provided file pointer. It is OK to specify @c stderr
  or @c stdout as output files. This function is meant for debugging
  purposes mostly.
 */
/*--------------------------------------------------------------------------*/
void iniparser_dump(dictionary * d, FILE * f);

/*-------------------------------------------------------------------------*/
/**
  @brief    Get the string associated to a key
  @param    d       Dictionary to search
  @param    key     Key string to look for
  @param    def     Default value to return if key not found.
  @return   pointer to statically allocated character string

  This function queries a dictionary for a key. A key as read from an
  ini file is given as "section:key". If the key cannot be found,
  the pointer passed as 'def' is returned.
  The returned char pointer is pointing to a string allocated in
  the dictionary, do not free or modify it.
 */
/*--------------------------------------------------------------------------*/
char * iniparser_getstring(dictionary * d, const char * key, char * def);

/*-------------------------------------------------------------------------*/
/**
  @brief    Get the string associated to a key, convert to an int
  @param    d Dictionary to search
  @param    key Key string to look for
  @param    notfound Value to return in case of error
  @return   integer

  This function queries a dictionary for a key. A key as read from an
  ini file is given as "section:key". If the key cannot be found,
  the notfound value is returned.

  Supported values for integers include the usual C notation
  so decimal, octal (starting with 0) and hexadecimal (starting with 0x)
  are supported. Examples:

  - "42"      ->  42
  - "042"     ->  34 (octal -> decimal)
  - "0x42"    ->  66 (hexa  -> decimal)

  Warning: the conversion may overflow in various ways. Conversion is
  totally outsourced to strtol(), see the associated man page for overflow
  handling.

  Credits: Thanks to A. Becker for suggesting strtol()
 */
/*--------------------------------------------------------------------------*/
int iniparser_getint(dictionary * d, const char * key, int notfound);

/*-------------------------------------------------------------------------*/
/**
  @brief    Get the string associated to a key, convert to a double
  @param    d Dictionary to search
  @param    key Key string to look for
  @param    notfound Value to return in case of error
  @return   double

  This function queries a dictionary for a key. A key as read from an
  ini file is given as "section:key". If the key cannot be found,
  the notfound value is returned.
 */
/*--------------------------------------------------------------------------*/
double iniparser_getdouble(dictionary * d, char * key, double notfound);

/*-------------------------------------------------------------------------*/
/**
  @brief    Get the string associated to a key, convert to a boolean
  @param    d Dictionary to search
  @param    key Key string to look for
  @param    notfound Value to return in case of error
  @return   integer

  This function queries a dictionary for a key. A key as read from an
  ini file is given as "section:key". If the key cannot be found,
  the notfound value is returned.

  A true boolean is found if one of the following is matched:

  - A string starting with 'y'
  - A string starting with 'Y'
  - A string starting with 't'
  - A string starting with 'T'
  - A string starting with '1'

  A false boolean is found if one of the following is matched:

  - A string starting with 'n'
  - A string starting with 'N'
  - A string starting with 'f'
  - A string starting with 'F'
  - A string starting with '0'

  The notfound value returned if no boolean is identified, does not
  necessarily have to be 0 or 1.
 */
/*--------------------------------------------------------------------------*/
int iniparser_getboolean(dictionary * d, const char * key, int notfound);


/*-------------------------------------------------------------------------*/
/**
  @brief    Set an entry in a dictionary.
  @param    ini     Dictionary to modify.
  @param    entry   Entry to modify (entry name)
  @param    val     New value to associate to the entry.
  @return   int 0 if Ok, -1 otherwise.

  If the given entry can be found in the dictionary, it is modified to
  contain the provided value. If it cannot be found, -1 is returned.
  It is Ok to set val to NULL.
 */
/*--------------------------------------------------------------------------*/
int iniparser_setstring(dictionary * ini, char * entry, char * val);


/*-------------------------------------------------------------------------*/
/**
  @brief    Delete an entry in a dictionary
  @param    ini     Dictionary to modify
  @param    entry   Entry to delete (entry name)
  @return   void

  If the given entry can be found, it is deleted from the dictionary.
 */
/*--------------------------------------------------------------------------*/
void iniparser_unset(dictionary * ini, char * entry);

/*-------------------------------------------------------------------------*/
/**
  @brief    Finds out if a given entry exists in a dictionary
  @param    ini     Dictionary to search
  @param    entry   Name of the entry to look for
  @return   integer 1 if entry exists, 0 otherwise

  Finds out if a given entry exists in the dictionary. Since sections
  are stored as keys with NULL associated values, this is the only way
  of querying for the presence of sections in a dictionary.
 */
/*--------------------------------------------------------------------------*/
int iniparser_find_entry(dictionary * ini, char * entry) ;

/*-------------------------------------------------------------------------*/
/**
  @brief    Parse an ini file and return an allocated dictionary object
  @param    ininame Name of the ini file to read.
  @return   Pointer to newly allocated dictionary

  This is the parser for ini files. This function is called, providing
  the name of the file to be read. It returns a dictionary object that
  should not be accessed directly, but through accessor functions
  instead.

  The returned dictionary must be freed using iniparser_freedict().
 */
/*--------------------------------------------------------------------------*/
dictionary * iniparser_load(const char * ininame);

/*-------------------------------------------------------------------------*/
/**
  @brief    Free all memory associated to an ini dictionary
  @param    d Dictionary to free
  @return   void

  Free all memory associated to an ini dictionary.
  It is mandatory to call this function before the dictionary object
  gets out of the current context.
 */
/*--------------------------------------------------------------------------*/
void iniparser_freedict(dictionary * d);

#endif

XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXx main.cpp XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXx

 #include "mbed.h"
#include "iniparser.h"

/* iniparser - an INI file parser under mit licence.
   url: http://ndevilla.free.fr/iniparser/
   doc: http://ndevilla.free.fr/iniparser/html/index.html
*/

#if 0 // content of foo.txt
[sec1]
foo = bar ; command
quax = 42

[sec2]
foo = 0; nope
#endif

DigitalOut myled(LED1);
LocalFileSystem local("local");
int main() {
    dictionary *dir = iniparser_load("/local/foo.txt");
    printf("sec1: %s\n", iniparser_getstring(dir, "sec1:foo", "default"));
    printf("sec2: %d\n", iniparser_getint(dir, "sec2:foo", 42));
    while(1) {
        myled = 1;
        wait(0.2);
        myled = 0;
        wait(0.2);
    }
}

XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXx EOF XxXxXxXxXxXxXxXxXxXxXxXxXxXxXxXx