Fixed F_eval() and F_sprintf() for 2.0.

[mpsl.git] / mpsl_f.c

/*

    MPSL - Minimum Profit Scripting Language
    Copyright (C) 2003/2009 Angel Ortega <angel@triptico.com>

    mpsl_f.c - Minimum Profit Scripting Language Function Library

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

    http://www.triptico.com

*/

#include "config.h"

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

#include <time.h>

#include "mpdm.h"
#include "mpsl.h"

/** code **/

#define A(n) mpdm_aget(a, n)
#define A0 A(0)
#define A1 A(1)
#define A2 A(2)
#define IA(n) mpdm_ival(A(n))
#define IA0 IA(0)
#define IA1 IA(1)
#define IA2 IA(2)
#define IA3 IA(3)
#define RA(n) mpdm_rval(A(n))
#define RA0 RA(0)
#define RA1 RA(1)
#define RA2 RA(2)
#define RA3 RA(3)

/**
 * size - Returns the size of a value.
 * @v: the value
 *
 * Returns the size of a value. For scalars, the size is the
 * string length; for arrays, the number of elements, and
 * for hashes, the number of buckets in the hash (which is
 * probably not useful, see hsize() instead).
 * [Value Management]
 */
/** integer = size(v); */
/* ; */
static mpdm_t F_size(mpdm_t a) {
        return MPDM_I(mpdm_size(A0));
}

/**
 * clone - Creates a clone of a value.
 * @v: the value
 *
 * Creates a clone of a value. If the value is multiple, a new value will
 * be created containing clones of all its elements; otherwise,
 * the same unchanged value is returned.
 * [Value Management]
 */
/** v2 = clone(v); */
static mpdm_t F_clone(mpdm_t a) {
        return mpdm_clone(A0);
}

/**
 * dump - Dumps a value to stdin.
 * @v: The value
 *
 * Dumps a value to stdin. The value can be complex. This function
 * is for debugging purposes only.
 * [Debugging]
 * [Input-Output]
 */
/** dump(v); */
static mpdm_t F_dump(mpdm_t a) {
        mpdm_dump(A0); return NULL;
}

/**
 * dumper - Returns a visual representation of a complex value.
 * @v: The value
 *
 * Returns a visual representation of a complex value.
 * [Debugging]
 * [Strings]
 */
/** string = dumper(v); */
static mpdm_t F_dumper(mpdm_t a) {
        return mpdm_dumper(A0);
}

/**
 * cmp - Compares two values.
 * @v1: the first value
 * @v2: the second value
 *
 * Compares two values. If both are strings, a standard string
 * comparison (using wcscmp()) is returned; if both are arrays,
 * the size is compared first and, if they have the same number
 * elements, each one is compared; otherwise, a simple pointer
 * comparison is done.
 *
 * In either case, an integer is returned, which is < 0 if @v1
 * is lesser than @v2, > 0 on the contrary or 0 if both are
 * equal.
 * [Strings]
 * [Arrays]
 */
/** integer = cmp(v); */
static mpdm_t F_cmp(mpdm_t a) {
        return MPDM_I(mpdm_cmp(A0, A1));
}

/**
 * is_array - Tests if a value is an array.
 * @v: the value
 *
 * Returns non-zero if @v is an array.
 * [Value Management]
 * [Arrays]
 */
/** bool = is_array(v); */
static mpdm_t F_is_array(mpdm_t a) {
        return mpsl_boolean(MPDM_IS_ARRAY(A0));
}

/**
 * is_hash - Tests if a value is a hash.
 * @v: the value
 *
 * Returns non-zero if @v is a hash.
 * [Value Management]
 * [Hashes]
 */
/** bool = is_hash(v); */
static mpdm_t F_is_hash(mpdm_t a) {
        return mpsl_boolean(MPDM_IS_HASH(A0));
}

/**
 * is_exec - Tests if a value is executable.
 * @v: the value
 *
 * Returns non-zero if @v is a executable.
 * [Value Management]
 */
/** bool = is_exec(v); */
static mpdm_t F_is_exec(mpdm_t a) {
        return mpsl_boolean(MPDM_IS_EXEC(A0));
}

/**
 * splice - Creates a new string value from another.
 * @v: the original value
 * @i: the value to be inserted
 * @offset: offset where the substring is to be inserted
 * @del: number of characters to delete
 *
 * Creates a new string value from @v, deleting @del chars at @offset
 * and substituting them by @i. If @del is 0, no deletion is done.
 * both @offset and @del can be negative; if this is the case, it's
 * assumed as counting from the end of @v. If @v is NULL, @i will become
 * the new string, and both @offset and @del will be ignored. If @v is
 * not NULL and @i is, no insertion process is done (only deletion, if
 * applicable).
 *
 * Returns a two element array, with the new string in the first
 * element and the deleted string in the second (with a NULL value
 * if @del is 0).
 * [Strings]
 */
/** array = splice(v, i, offset, del); */
static mpdm_t F_splice(mpdm_t a) {
        return mpdm_splice(A0,A1,IA2,IA3);
}

/**
 * expand - Expands an array.
 * @a: the array
 * @offset: insertion offset
 * @num: number of elements to insert
 *
 * Expands an array value, inserting @num elements (initialized
 * to NULL) at the specified @offset.
 * [Arrays]
 */
/** expand(a, offset, num); */
static mpdm_t F_expand(mpdm_t a) {
        return mpdm_expand(A0,IA1,IA2);
}

/**
 * collapse - Collapses an array.
 * @a: the array
 * @offset: deletion offset
 * @num: number of elements to collapse
 *
 * Collapses an array value, deleting @num elements at
 * the specified @offset.
 * [Arrays]
 */
/** collapse(a, offset, num); */
static mpdm_t F_collapse(mpdm_t a) {
        return mpdm_collapse(A0,IA1,IA2);
}

/**
 * ins - Insert an element in an array.
 * @a: the array
 * @e: the element to be inserted
 * @offset: subscript where the element is going to be inserted
 *
 * Inserts the @e value in the @a array at @offset.
 * Further elements are pushed up, so the array increases its size
 * by one. Returns the inserted element.
 * [Arrays]
 */
/** e = ins(a, e, offset); */
static mpdm_t F_ins(mpdm_t a) {
        return mpdm_ins(A0,A1,IA2);
}

/**
 * adel - Deletes an element of an array.
 * @a: the array
 * @offset: subscript of the element to be deleted
 *
 * Deletes the element at @offset of the @a array. The array
 * is shrinked by one. If @offset is negative, is counted from
 * the end of the array (so a value of -1 means delete the
 * last element of the array).
 *
 * Returns NULL (previous versions returned the deleted element).
 * [Arrays]
 */
/** v = adel(a, offset); */
static mpdm_t F_adel(mpdm_t a) {
        return mpdm_adel(A0,IA1);
}

/**
 * shift - Extracts the first element of an array.
 * @a: the array
 *
 * Extracts the first element of the array. The array
 * is shrinked by one.
 *
 * Returns the deleted element.
 * [Arrays]
 */
/** v = shift(a); */
static mpdm_t F_shift(mpdm_t a) {
        return mpdm_shift(A0);
}

/**
 * push - Pushes a value into an array.
 * @a: the array
 * @e: the value
 *
 * Pushes a value into an array (i.e. inserts at the end).
 * [Arrays]
 */
/** e = push(a, e); */
static mpdm_t F_push(mpdm_t a) {
        return mpdm_push(A0,A1);
}

/**
 * pop - Pops a value from an array.
 * @a: the array
 *
 * Pops a value from the array (i.e. deletes from the end
 * and returns it).
 * [Arrays]
 */
/** v = pop(a); */
static mpdm_t F_pop(mpdm_t a) {
        return mpdm_pop(A0);
}

/**
 * queue - Implements a queue in an array.
 * @a: the array
 * @e: the element to be pushed
 * @size: maximum size of array
 *
 * Pushes the @e element into the @a array. If the array already has
 * @size elements, the first (oldest) element is deleted from the
 * queue and returned.
 *
 * Returns the deleted element, or NULL if the array doesn't have
 * @size elements yet.
 * [Arrays]
 */
/** v = queue(a, e, size); */
static mpdm_t F_queue(mpdm_t a) {
        return mpdm_queue(A0,A1,IA2);
}

/**
 * seek - Seeks a value in an array (sequential).
 * @a: the array
 * @k: the key
 * @step: number of elements to step
 *
 * Seeks sequentially the value @k in the @a array in
 * increments of @step. A complete search should use a step of 1.
 * Returns the offset of the element if found, or -1 otherwise.
 * [Arrays]
 */
/** integer = seek(a, k, step); */
static mpdm_t F_seek(mpdm_t a) {
        return MPDM_I(mpdm_seek(A0,A1,IA2));
}

/**
 * sort - Sorts an array.
 * @a: the array
 * @sorting_func: sorting function
 *
 * Sorts the array. For each pair of elements being sorted, the
 * @sorting_func is called with the two elements to be sorted as
 * arguments. This function must return a signed integer value indicating
 * the sorting order.
 *
 * If no function is supplied, the sorting is done using cmp().
 *
 * Returns the same array (previous versions returned a new array).
 * [Arrays]
 */
/** array = sort(a); */
/** array = sort(a, sorting_func); */
static mpdm_t F_sort(mpdm_t a) {
        return mpdm_sort_cb(A0,1,A1);
}

/**
 * split - Separates a string into an array of pieces.
 * @s: the separator
 * @v: the value to be separated
 *
 * Separates the @v string value into an array of pieces, using @s
 * as a separator.
 *
 * If the separator is NULL, the string is splitted by characters.
 *
 * If the string does not contain the separator, an array holding 
 * the complete string as its unique argument is returned.
 * [Arrays]
 * [Strings]
 */
/** array = split(s, v); */
static mpdm_t F_split(mpdm_t a) {
        return mpdm_split(A0,A1);
}

/**
 * join - Joins all elements of an array into one.
 * @s: joiner string
 * @a: array to be joined
 *
 * Joins all elements from @a into one string, using @s as a glue.
 * [Arrays]
 * [Strings]
 */
/** string = join(s, a); */
static mpdm_t F_join(mpdm_t a) {
        return mpdm_join(A0,A1);
}

/**
 * hsize - Returns the number of pairs of a hash.
 * @h: the hash
 *
 * Returns the number of key-value pairs of a hash.
 * [Hashes]
 */
/** integer = hsize(h); */
static mpdm_t F_hsize(mpdm_t a) {
        return MPDM_I(mpdm_hsize(A0));
}

/**
 * exists - Tests if a key exists.
 * @h: the hash
 * @k: the key
 *
 * Returns 1 if @k is defined in @h, or 0 othersize.
 * [Hashes]
 */
/** bool = exists(h, k); */
static mpdm_t F_exists(mpdm_t a) {
        return mpsl_boolean(mpdm_exists(A0, A1));
}

/**
 * hdel - Deletes a key from a hash.
 * @h: the hash
 * @k: the key
 *
 * Deletes the key @k from the hash @h. Returns the previous
 * value, or NULL if the key was not defined.
 * [Hashes]
 */
/** v = hdel(h, k); */
static mpdm_t F_hdel(mpdm_t a) {
        return mpdm_hdel(A0, A1);
}

/**
 * keys - Returns the keys of a hash.
 * @h: the hash
 *
 * Returns an array containing all the keys of the @h hash.
 * [Hashes]
 * [Arrays]
 */
/** array = keys(h); */
static mpdm_t F_keys(mpdm_t a) {
        return mpdm_keys(A0);
}

/**
 * open - Opens a file.
 * @filename: the file name
 * @mode: an fopen-like mode string
 *
 * Opens a file. If @filename can be open in the specified @mode, a
 * value will be returned containing the file descriptor, or NULL
 * otherwise.
 *
 * If the file is open for reading, some charset detection methods are
 * used. If any of them is successful, its name is stored in the
 * `DETECTED_ENCODING' global variable. This value is
 * suitable to be copied over `ENCODING' or `TEMP_ENCODING'.
 *
 * If the file is open for writing, the encoding to be used is read from
 * the `ENCODING' global variable and, if not set, from the
 * `TEMP_ENCODING' one. The latter will always be deleted afterwards.
 * [Input-Output]
 * [Character Set Conversion]
 */
/** fd = open(filename, mode); */
static mpdm_t F_open(mpdm_t a) {
        return mpdm_open(A0, A1);
}

/**
 * close - Closes a file descriptor.
 * @fd: the file descriptor
 *
 * Closes the file descriptor.
 * [Input-Output]
 */
/** close(fd); */
static mpdm_t F_close(mpdm_t a) {
        return mpdm_close(A0);
}

/**
 * read - Reads a line from a file descriptor.
 * @fd: the file descriptor
 *
 * Reads a line from @fd. Returns the line, or NULL on EOF.
 * [Input-Output]
 * [Character Set Conversion]
 */
/** string = read(fd); */
static mpdm_t F_read(mpdm_t a) {
        return mpdm_read(A0);
}

/**
 * getchar - Reads a character from a file descriptor.
 * @fd: the file descriptor
 *
 * Returns a character read from @fd, or NULL on EOF. No
 * charset conversion is done.
 * [Input-Output]
 */
/** string = getchar(fd); */
static mpdm_t F_getchar(mpdm_t a) {
        return mpdm_getchar(A0);
}

/**
 * putchar - Writes a character to a file descriptor.
 * @fd: the file descriptor
 * @s: the string
 *
 * Writes the first character in @s into @fd. No charset
 * conversion is done.
 *
 * Returns @s or NULL if the writing failed.
 * [Input-Output]
 */
/** s = putchar(fd, s); */
static mpdm_t F_putchar(mpdm_t a) {
        return mpdm_putchar(A0, A1);
}

/**
 * fseek - Sets a file pointer.
 * @fd: the file descriptor
 * @offset: the offset
 * @whence: the position
 *
 * Sets the file pointer position of @fd to @offset. @whence can
 * be: 0 for SEEK_SET, 1 for SEEK_CUR and 2 for SEEK_END.
 *
 * Returns the value from the fseek() C function call.
 * [Input-Output]
 */
/** integer = fseek(fd, offset, whence); */
static mpdm_t F_fseek(mpdm_t a) {
        return MPDM_I(mpdm_fseek(A0, IA1, IA2));
}

/**
 * ftell - Returns the current file pointer.
 * @fd: the file descriptor
 *
 * Returns the position of the file pointer in @fd.
 * [Input-Output]
 */
/** integer = ftell(fd); */
static mpdm_t F_ftell(mpdm_t a) {
        return MPDM_I(mpdm_ftell(A0));
}

/**
 * unlink - Deletes a file.
 * @filename: file name to be deleted
 *
 * Deletes a file.
 * [Input-Output]
 */
/** bool = unlink(filename); */
static mpdm_t F_unlink(mpdm_t a) {
        return mpsl_boolean(mpdm_unlink(A0));
}

/**
 * stat - Gives status from a file.
 * @filename: file name to get the status from
 *
 * Returns a 14 element array of the status (permissions, onwer, etc.)
 * from the desired @filename, or NULL if the file cannot be accessed.
 * (man 2 stat).
 *
 * The values are: 0, device number of filesystem; 1, inode number;
 * 2, file mode; 3, number of hard links to the file; 4, uid; 5, gid;
 * 6, device identifier; 7, total size of file in bytes; 8, atime;
 * 9, mtime; 10, ctime; 11, preferred block size for system I/O;
 * 12, number of blocks allocated and 13, canonicalized file name.
 * Not all elements have necesarily meaningful values, as most are
 * system-dependent.
 * [Input-Output]
 */
/** array = stat(filename); */
static mpdm_t F_stat(mpdm_t a) {
        return mpdm_stat(A0);
}

/**
 * chmod - Changes a file's permissions.
 * @filename: the file name
 * @perms: permissions (element 2 from stat())
 *
 * Changes the permissions for a file.
 * [Input-Output]
 */
/** integer = chmod(filename, perms); */
static mpdm_t F_chmod(mpdm_t a) {
        return MPDM_I(mpdm_chmod(A0,A1));
}

/**
 * chown - Changes a file's owner.
 * @filename: the file name
 * @uid: user id (element 4 from stat())
 * @gid: group id (element 5 from stat())
 *
 * Changes the owner and group id's for a file.
 * [Input-Output]
 */
/** integer = chown(filename, uid, gid); */
static mpdm_t F_chown(mpdm_t a) {
        return MPDM_I(mpdm_chown(A0,A1,A2));
}

/**
 * glob - Executes a file globbing.
 * @spec: Globbing spec
 * @base: Optional base directory
 *
 * Executes a file globbing. @spec is system-dependent, but usually
 * the * and ? metacharacters work everywhere. @base can contain a
 * directory; if that's the case, the output strings will include it.
 * In any case, each returned value will be suitable for a call to
 * open().
 *
 * Returns an array of files that match the globbing (can be an empty
 * array if no file matches), or NULL if globbing is unsupported.
 * Directories are returned first and their names end with a slash.
 * [Input-Output]
 */
/** array = glob(spec, base); */
static mpdm_t F_glob(mpdm_t a) {
        return mpdm_glob(A0, A1);
}

/**
 * encoding - Sets the current charset encoding for files.
 * @charset: the charset name.
 *
 * Sets the current charset encoding for files. Future opened
 * files will be assumed to be encoded with @charset, which can
 * be any of the supported charset names (utf-8, iso-8859-1, etc.),
 * and converted on each read / write. If charset is NULL, it
 * is reverted to default charset conversion (i.e. the one defined
 * in the locale).
 *
 * This function stores the @charset value into the `ENCODING' global
 * variable.
 *
 * Returns a negative number if @charset is unsupported, or zero
 * if no errors were found.
 * [Input-Output]
 * [Character Set Conversion]
 */
/** integer = encoding(charset); */
static mpdm_t F_encoding(mpdm_t a) {
        return MPDM_I(mpdm_encoding(A0));
}

/**
 * popen - Opens a pipe.
 * @prg: the program to pipe
 * @mode: an fopen-like mode string
 *
 * Opens a pipe to a program. If @prg can be open in the specified @mode,
 * return file descriptor, or NULL otherwise.
 *
 * The @mode can be `r' (for reading), `w' (for writing), or `r+' or `w+'
 * for a special double pipe reading-writing mode.
 * [Input-Output]
 */
/** fd = popen(prg, mode); */
static mpdm_t F_popen(mpdm_t a) {
        return mpdm_popen(A0, A1);
}

/**
 * pclose - Closes a pipe.
 * @fd: the value containing the file descriptor
 *
 * Closes a pipe.
 * [Input-Output]
 */
/** pclose(fd); */
static mpdm_t F_pclose(mpdm_t a) {
        return mpdm_pclose(A0);
}

/**
 * regex - Matches a regular expression.
 * @r: the regular expression
 * @ra: an array of regular expressions
 * @v: the value to be matched
 * @offset: offset from the start of the value
 *
 * Matches a regular expression against a value. Valid flags are `i',
 * for case-insensitive matching, `m', to treat the string as a
 * multiline string (i.e., one containing newline characters), so
 * that ^ and $ match the boundaries of each line instead of the
 * whole string, `l', to return the last matching instead of the
 * first one, or `g', to match globally; in that last case, an array
 * containing all matches is returned instead of a string scalar.
 *
 * If @r is a string, an ordinary regular expression matching is tried
 * over the @v string. If the matching is possible, the match result
 * is returned, or NULL otherwise.
 *
 * If @r is an array (of strings), each element is tried sequentially
 * as an individual regular expression over the @v string, each one using
 * the offset returned by the previous match. All regular expressions
 * must match to be successful. If this is the case, an array (with
 * the same number of arguments) is returned containing the matched
 * strings, or NULL otherwise.
 *
 * If @r is NULL, the result of the previous regex matching
 * is returned as a two element array. The first element will contain
 * the character offset of the matching and the second the number of
 * characters matched. If the previous regex was unsuccessful, NULL
 * is returned.
 * [Regular Expressions]
 */
/** string = regex(r, v); */
/** string = regex(r, v, offset); */
/** array = regex(ra, v); */
/** array = regex(); */
static mpdm_t F_regex(mpdm_t a) {
        return mpdm_regex(A0,A1,IA2);
}

/**
 * sregex - Matches and substitutes a regular expression.
 * @r: the regular expression
 * @v: the value to be matched
 * @s: the substitution string, hash or code
 * @offset: offset from the start of v
 *
 * Matches a regular expression against a value, and substitutes the
 * found substring with @s. Valid flags are `i', for case-insensitive
 * matching, and `g', for global replacements (all ocurrences in @v
 * will be replaced, instead of just the first found one).
 *
 * If @s is executable, it's executed with the matched part as
 * the only argument and its return value is used as the
 * substitution string.
 *
 * If @s is a hash, the matched string is used as a key to it and
 * its value used as the substitution. If this value itself is
 * executable, it's executed with the matched string as its only
 * argument and its return value used as the substitution.
 *
 * If @r is NULL, returns the number of substitutions made in the
 * previous call to sregex() (can be zero if none was done).
 *
 * Returns the modified string, or the original one if no substitutions
 * were done.
 * [Regular Expressions]
 */
/** string = sregex(r, v, s); */
/** string = sregex(r, v, s, offset); */
/** integer = sregex(); */
static mpdm_t F_sregex(mpdm_t a) {
        return mpdm_sregex(A0,A1,A2,IA3);
}

/**
 * gettext - Translates a string to the current language.
 * @str: the string
 *
 * Translates the @str string to the current language.
 *
 * This function can still be used even if there is no real gettext
 * support by manually filling the __I18N__ hash.
 *
 * If the string is found in the current table, the translation is
 * returned; otherwise, the same @str value is returned.
 * [Strings]
 * [Localization]
 */
/** string = gettext(str); */
static mpdm_t F_gettext(mpdm_t a) {
        return mpdm_gettext(A0);
}

/**
 * gettext_domain - Sets domain and data directory for translations.
 * @dom: the domain (application name)
 * @data: directory contaning the .mo files
 *
 * Sets the domain (application name) and translation data for translating
 * strings that will be returned by gettext(). @data must point to a
 * directory containing the .mo (compiled .po) files.
 *
 * If there is no gettext support, returns 0, or 1 otherwise.
 * [Strings]
 * [Localization]
 */
/** bool = gettext_domain(dom, data); */
static mpdm_t F_gettext_domain(mpdm_t a) {
        return MPDM_I(mpdm_gettext_domain(A0, A1));
}

/**
 * load - Loads an MPSL source code file.
 * @source_file: the source code file
 *
 * Loads and executes an MPSL source code file and returns
 * its value.
 * [Code Control]
 */
/** load(source_file); */
static mpdm_t F_load(mpdm_t a) {
        return mpdm_exec(mpsl_compile_file(A0), NULL);
}

/**
 * compile - Compiles a string of MSPL source code file.
 * @source: the source code string
 *
 * Compiles a string of MPSL source code and returns an
 * executable value.
 * [Code Control]
 */
/** func = compile(source); */
static mpdm_t F_compile(mpdm_t a) {
        return mpsl_compile(A0);
}

/**
 * error - Simulates an error.
 * @err: the error message
 *
 * Simulates an error. The @err error message is stored in the `ERROR'
 * global variable and an internal abort global flag is set, so no further
 * MPSL code can be executed until reset.
 */
/** error(err); */
static mpdm_t F_error(mpdm_t a) {
        return mpsl_error(A0);
}

/**
 * sweep - Sweeps unreferenced values.
 * @count: number of values to be swept
 *
 * Destroys values with a reference count of 0. @count is the
 * number of values to be checked for deletion; special values of
 * @count are -1, that forces a check of all currently known values
 * (can be time-consuming) and 0, which tells sweep() to check a
 * small group of them on each call.
 * [Value Management]
 */
/** sweep(count); */
static mpdm_t F_sweep(mpdm_t a) {
        mpdm_sweep(IA0); return NULL;
}

/**
 * uc - Converts a string to uppercase.
 * @str: the string to be converted
 *
 * Returns @str converted to uppercase.
 * [Strings]
 */
/** string = uc(str); */
static mpdm_t F_uc(mpdm_t a) {
        return mpdm_ulc(A0, 1);
}

/**
 * lc - Converts a string to lowercase.
 * @str: the string to be converted
 *
 * Returns @str converted to lowercase.
 * [Strings]
 */
/** string = uc(str); */
static mpdm_t F_lc(mpdm_t a) {
        return mpdm_ulc(A0, 0);
}

/**
 * time - Returns the current time.
 *
 * Returns the current time from the epoch (C library time()).
 * [Miscellaneous]
 */
/** integer = time(); */
static mpdm_t F_time(mpdm_t a) {
        return MPDM_I(time(NULL));
}

/**
 * chdir - Changes the working directory
 * @dir: the new path
 *
 * Changes the working directory
 * [Input-Output]
 */
/** integer = chdir(dir); */
static mpdm_t F_chdir(mpdm_t a) {
        return MPDM_I(mpdm_chdir(A0));
}

/**
 * sscanf - Extracts data like sscanf().
 * @fmt: the string format
 * @str: the string to be parsed
 * @offset: the character offset to start scanning
 *
 * Extracts data from a string using a special format pattern, very
 * much like the scanf() series of functions in the C library. Apart
 * from the standard percent-sign-commands (s, u, d, i, f, x,
 * n, [, with optional size and * to ignore), it implements S,
 * to match a string of characters upto what follows in the format
 * string. Also, the [ set of characters can include other % formats.
 *
 * Returns an array with the extracted values. If %n is used, the
 * position in the scanned string is returned as the value.
 * [Strings]
 */
/** array = sscanf(fmt, str); */
/** array = sscanf(fmt, str, offset); */
static mpdm_t F_sscanf(mpdm_t a) {
        return mpdm_sscanf(A0, A1, IA2);
}

/**
 * eval - Evaluates MSPL code.
 * @code: A value containing a string of MPSL code, or executable code
 * @args: optional arguments for @code
 *
 * Evaluates a piece of code. The @code can be a string containing MPSL
 * source code (that will be compiled) or a direct executable value. If
 * the compilation or the execution gives an error, the `ERROR' variable
 * will be set to a printable value and NULL returned. Otherwise, the
 * exit value from the code is returned and `ERROR' set to NULL. The 
 * internal abort flag is reset on exit.
 *
 * [Code Control]
 */
/** v = eval(code, args); */
static mpdm_t F_eval(mpdm_t a)
{
        mpdm_t r, c;

        a = mpdm_ref(mpdm_clone(a));
        c = mpdm_shift(a);

        r = mpsl_eval(c, a);

        mpdm_unref(a);

        return r;
}


/**
 * sprintf - Formats a sprintf()-like string.
 * @fmt: the string format
 * @arg1: first argument
 * @arg2: second argument
 * @argn: nth argument
 *
 * Formats a string using the sprintf() format taking the values from
 * the variable arguments.
 * [Strings]
 */
/** string = sprintf(fmt, arg1 [,arg2 ... argn]); */
static mpdm_t F_sprintf(mpdm_t a)
{
        mpdm_t f, v, r;

        a = mpdm_ref(mpdm_clone(a));
        f = mpdm_shift(a);

        /* if the first argument is an array, take it as the arguments */
        if ((v = mpdm_aget(a, 0)) != NULL && MPDM_IS_ARRAY(v))
                a = v;

        r = mpdm_sprintf(f, a);

        mpdm_unref(a);

        return r;
}


/**
 * print - Writes values to stdout.
 * @arg1: first argument
 * @arg2: second argument
 * @argn: nth argument
 *
 * Writes the variable arguments to stdout.
 * [Input-Output]
 */
/** print(arg1 [,arg2 ... argn]); */
static mpdm_t F_print(mpdm_t a)
{
        int n;

        for (n = 0; n < mpdm_size(a); n++)
                mpdm_write_wcs(stdout, mpdm_string(A(n)));
        return NULL;
}


/**
 * write - Writes values to a file descriptor.
 * @fd: the file descriptor
 * @arg1: first argument
 * @arg2: second argument
 * @argn: nth argument
 *
 * Writes the variable arguments to the file descriptor, doing
 * charset conversion in the process.
 *
 * Returns the total size written to @fd.
 * [Input-Output]
 * [Character Set Conversion]
 */
/** integer = write(fd, arg1 [,arg2 ... argn]); */
static mpdm_t F_write(mpdm_t a)
{
        int n, r = 0;

        for (n = 1; n < mpdm_size(a); n++)
                r += mpdm_write(A0, A(n));

        return MPDM_I(r);
}


/**
 * chr - Returns the Unicode character represented by the codepoint.
 * @c: the codepoint as an integer value
 *
 * Returns a 1 character string containing the character which
 * Unicode codepoint is @c.
 * [Strings]
 */
/** string = chr(c); */
static mpdm_t F_chr(mpdm_t a)
{
        wchar_t tmp[2];

        tmp[0] = (wchar_t) mpdm_ival(mpdm_aget(a, 0));
        tmp[1] = L'\0';

        return MPDM_S(tmp);
}


/**
 * ord - Returns the Unicode codepoint of a character.
 * @str: the string
 *
 * Returns the Unicode codepoint for the first character in
 * the string.
 * [Strings]
 */
/** integer = ord(str); */
static mpdm_t F_ord(mpdm_t a)
{
        int ret = 0;
        mpdm_t v = mpdm_aget(a, 0);

        if (v != NULL) {
                wchar_t * ptr = mpdm_string(v);
                ret = (int) *ptr;
        }

        return MPDM_I(ret);
}


/**
 * map - Maps an array into another.
 * @filter: the filter
 * @a: the array
 *
 * Returns a new array built by applying the @filter to all the
 * elements of the array @a. The filter can be an executable function
 * accepting one argument, in which case the return value of the function
 * will be used as the output element; @filt can also be a hash, in which
 * case the original element will be used as a key to the hash and the
 * associated value used as the output element.
 *
 * [Arrays]
 */
/** array = map(filter, a); */
static mpdm_t F_map(mpdm_t a)
{
        mpdm_t key = mpdm_aget(a, 0);
        mpdm_t set = mpdm_aget(a, 1);
        mpdm_t out;

        /* map NULL to NULL */
        if (set == NULL)
                return NULL;

        out = mpdm_ref(MPDM_A(mpdm_size(set)));

        if (MPDM_IS_EXEC(key)) {
                int n;

                /* executes the code using the element as argument
                   and stores the result in the output array */
                for (n = 0; n < mpdm_size(set); n++)
                        mpdm_aset(out, mpdm_exec_1(key, mpdm_aget(set, n)), n);
        }
        else
        if(MPDM_IS_HASH(key)) {
                int n;

                /* maps each value using the element as key */
                for (n = 0; n < mpdm_size(set); n++)
                        mpdm_aset(out, mpdm_hget(key, mpdm_aget(set, n)), n);
        }

        return mpdm_unref(out);
}


/**
 * grep - Greps inside an array.
 * @filter: the filter
 * @a: the array
 *
 * Greps inside an array and returns another one containing only the
 * elements that passed the filter. If @filter is a string, it's accepted
 * as a regular expression, which will be applied to each element.
 * If @filter is executable, it will be called with the element as its
 * only argument and its return value used as validation.
 *
 * The new array will contain all elements that passed the filter.
 * [Arrays]
 * [Regular Expressions]
 */
/** array = grep(filter, a); */
static mpdm_t F_grep(mpdm_t a)
{
        mpdm_t key = mpdm_aget(a, 0);
        mpdm_t set = mpdm_aget(a, 1);
        mpdm_t out = mpdm_ref(MPDM_A(0));

        if (MPDM_IS_EXEC(key)) {
                int n;

                /* it's executable */
                for (n = 0; n < mpdm_size(set); n++) {
                        mpdm_t v = mpdm_aget(set, n);

                        if (mpsl_is_true(mpdm_exec_1(key, v)))
                                mpdm_push(out, v);
                }
        }
        else
        if(key->flags & MPDM_STRING) {
                int n;

                /* it's a string; use it as a regular expression */
                for (n = 0; n < mpdm_size(set); n++) {
                        mpdm_t v = mpdm_aget(set, n);

                        if (mpdm_regex(key, v, 0))
                                mpdm_push(out, v);
                }
        }

        return mpdm_size(mpdm_unref(out)) == 0 ? NULL : out;
}

static mpdm_t F_getenv(mpdm_t a)
{
        mpdm_t e = mpdm_hget_s(mpdm_root(), L"ENV");

        return mpdm_hget(e, mpdm_aget(a, 0));
}

static mpdm_t F_bincall(mpdm_t a) {
        return MPDM_X(mpdm_ival(mpdm_aget(a, 0)));
}

/**
 * random - Returns a random value.
 *
 * Returns a random number from 0 to value - 1.
 * [Miscellaneous]
 */
/** integer = random(value); */
static mpdm_t F_random(mpdm_t a) {
        static unsigned int seed = 0;
        int r = 0;
        int range = mpdm_ival(mpdm_aget(a, 0));

        if (range == 0 || seed == 0)
                seed = time(NULL);
        else {
                seed = (seed * 58321) + 11113;
                r = (seed >> 16) % range;
        }

        return MPDM_I(r);
};


static struct {
        wchar_t * name;
        mpdm_t (* func)(mpdm_t);
} mpsl_funcs[] = {
        { L"size",      F_size },
        { L"clone",     F_clone },
        { L"dump",      F_dump },
        { L"dumper",    F_dumper },
        { L"cmp",       F_cmp },
        { L"is_array",  F_is_array },
        { L"is_hash",   F_is_hash },
        { L"is_exec",   F_is_exec },
        { L"splice",    F_splice },
        { L"expand",    F_expand },
        { L"collapse",  F_collapse },
        { L"ins",       F_ins },
        { L"adel",      F_adel },
        { L"shift",     F_shift },
        { L"push",      F_push },
        { L"pop",       F_pop },
        { L"queue",     F_queue },
        { L"seek",      F_seek },
        { L"sort",      F_sort },
        { L"split",     F_split },
        { L"join",      F_join },
        { L"hsize",     F_hsize },
        { L"exists",    F_exists },
        { L"hdel",      F_hdel },
        { L"keys",      F_keys },
        { L"open",      F_open },
        { L"close",     F_close },
        { L"read",      F_read },
        { L"write",     F_write },
        { L"getchar",   F_getchar },
        { L"putchar",   F_putchar },
        { L"fseek",     F_fseek },
        { L"ftell",     F_ftell },
        { L"unlink",    F_unlink },
        { L"stat",      F_stat },
        { L"chmod",     F_chmod },
        { L"chown",     F_chown },
        { L"glob",      F_glob },
        { L"encoding",  F_encoding },
        { L"popen",     F_popen },
        { L"pclose",    F_pclose },
        { L"regex",     F_regex },
        { L"sregex",    F_sregex },
        { L"load",      F_load },
        { L"compile",   F_compile },
        { L"error",     F_error },
        { L"eval",      F_eval },
        { L"print",     F_print },
        { L"gettext",   F_gettext },
        { L"gettext_domain", F_gettext_domain },
        { L"sprintf",   F_sprintf },
        { L"sweep",     F_sweep },
        { L"chr",       F_chr },
        { L"ord",       F_ord },
        { L"map",       F_map },
        { L"grep",      F_grep },
        { L"getenv",    F_getenv },
        { L"uc",        F_uc },
        { L"lc",        F_lc },
        { L"time",      F_time },
        { L"chdir",     F_chdir },
        { L"sscanf",    F_sscanf },
        { L"bincall",   F_bincall },
        { L"random",    F_random },
        { NULL,         NULL }
};


mpdm_t mpsl_build_funcs(void)
/* build all functions */
{
        mpdm_t c;
        int n;

        /* creates all the symbols in the CORE library */
        c = MPDM_H(0);
        for (n = 0; mpsl_funcs[n].name != NULL; n++) {
                mpdm_t f = MPDM_S(mpsl_funcs[n].name);
                mpdm_t x = MPDM_X(mpsl_funcs[n].func);

                mpdm_hset(mpdm_root(), f, x);
                mpdm_hset(c, f, x);
        }

        return c;
}