X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fvariable.c;h=9f21b1497be391e5a1ea635a61f7d7d9602b8085;hb=1076f8e88e2eee1bc780edd9d79d696a38af936d;hp=72d9ade6759cfd33e1ed855e5deac987fd18d3f5;hpb=828ac3a76939787e683e4cc498eb0dfb0b4f6f25;p=pspp diff --git a/src/data/variable.c b/src/data/variable.c index 72d9ade675..9f21b1497b 100644 --- a/src/data/variable.c +++ b/src/data/variable.c @@ -1,5 +1,5 @@ /* PSPP - a program for statistical analysis. - Copyright (C) 1997-9, 2000, 2006, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. + Copyright (C) 1997-9, 2000, 2006, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. 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 @@ -58,6 +58,7 @@ struct variable /* GUI information. */ enum measure measure; /* Nominal, ordinal, or continuous. */ + enum var_role role; /* Intended use. */ int display_width; /* Width of data editor column. */ enum alignment alignment; /* Alignment of data in GUI. */ @@ -72,14 +73,16 @@ struct variable char **short_names; size_t short_name_cnt; - /* Each command may use these fields as needed. */ - void *aux; - void (*aux_dtor) (struct variable *); - /* Custom attributes. */ struct attrset attributes; }; + +static void var_set_print_format_quiet (struct variable *v, const struct fmt_spec *print); +static void var_set_write_format_quiet (struct variable *v, const struct fmt_spec *write); +static bool var_set_label_quiet (struct variable *v, const char *label, bool issue_warning); +static void var_set_name_quiet (struct variable *v, const char *name); + /* Creates and returns a new variable with the given NAME and WIDTH and other fields initialized to default values. The variable is not added to a dictionary; for that, use @@ -93,13 +96,14 @@ var_create (const char *name, int width) assert (width >= 0 && width <= MAX_STRING); v = xzalloc (sizeof *v); - var_set_name (v, name); + var_set_name_quiet (v, name); v->width = width; mv_init (&v->miss, width); v->leave = var_must_leave (v); type = val_type_from_width (width); v->alignment = var_default_alignment (type); v->measure = var_default_measure (type); + v->role = ROLE_INPUT; v->display_width = var_default_display_width (width); v->print = v->write = var_default_formats (width); attrset_init (&v->attributes); @@ -108,36 +112,6 @@ var_create (const char *name, int width) return v; } -/* Creates and returns a clone of OLD_VAR. Most properties of - the new variable are copied from OLD_VAR, except: - - - The variable's short name is not copied, because there is - no reason to give a new variable with potentially a new - name the same short name. - - - The new variable is not added to OLD_VAR's dictionary by - default. Use dict_clone_var, instead, to do that. -*/ -struct variable * -var_clone (const struct variable *old_var) -{ - struct variable *new_var = var_create (var_get_name (old_var), - var_get_width (old_var)); - - var_set_missing_values (new_var, var_get_missing_values (old_var)); - var_set_print_format (new_var, var_get_print_format (old_var)); - var_set_write_format (new_var, var_get_write_format (old_var)); - var_set_value_labels (new_var, var_get_value_labels (old_var)); - var_set_label (new_var, var_get_label (old_var), false); - var_set_measure (new_var, var_get_measure (old_var)); - var_set_display_width (new_var, var_get_display_width (old_var)); - var_set_alignment (new_var, var_get_alignment (old_var)); - var_set_leave (new_var, var_get_leave (old_var)); - var_set_attributes (new_var, var_get_attributes (old_var)); - - return new_var; -} - /* Destroys variable V. V must not belong to a dictionary. If it does, use dict_delete_var instead. */ @@ -149,9 +123,8 @@ var_destroy (struct variable *v) assert (!var_has_vardict (v)); mv_destroy (&v->miss); var_clear_short_names (v); - var_clear_aux (v); val_labs_destroy (v->val_labs); - var_clear_label (v); + var_set_label_quiet (v, NULL, false); attrset_destroy (var_get_attributes (v)); free (v->name); ds_destroy (&v->name_and_label); @@ -173,8 +146,8 @@ var_get_name (const struct variable *v) /* Sets V's name to NAME, a UTF-8 encoded string. Do not use this function for a variable in a dictionary. Use dict_rename_var instead. */ -void -var_set_name (struct variable *v, const char *name) +static void +var_set_name_quiet (struct variable *v, const char *name) { assert (!var_has_vardict (v)); assert (id_is_plausible (name, false)); @@ -183,7 +156,17 @@ var_set_name (struct variable *v, const char *name) v->name = xstrdup (name); ds_destroy (&v->name_and_label); ds_init_empty (&v->name_and_label); - dict_var_changed (v); +} + +/* Sets V's name to NAME, a UTF-8 encoded string. + Do not use this function for a variable in a dictionary. Use + dict_rename_var instead. */ +void +var_set_name (struct variable *v, const char *name) +{ + struct variable *ov = var_clone (v); + var_set_name_quiet (v, name); + dict_var_changed (v, VAR_TRAIT_NAME, ov); } /* Returns VAR's dictionary class. */ @@ -201,7 +184,7 @@ compare_vars_by_name (const void *a_, const void *b_, const void *aux UNUSED) const struct variable *a = a_; const struct variable *b = b_; - return strcasecmp (a->name, b->name); + return utf8_strcasecmp (a->name, b->name); } /* A hsh_hash_func that hashes variable V based on its name. */ @@ -210,7 +193,7 @@ hash_var_by_name (const void *v_, const void *aux UNUSED) { const struct variable *v = v_; - return hash_case_string (v->name, 0); + return utf8_hash_case_string (v->name, 0); } /* A hsh_compare_func that orders pointers to variables A and B @@ -222,7 +205,7 @@ compare_var_ptrs_by_name (const void *a_, const void *b_, struct variable *const *a = a_; struct variable *const *b = b_; - return strcasecmp (var_get_name (*a), var_get_name (*b)); + return utf8_strcasecmp (var_get_name (*a), var_get_name (*b)); } /* A hsh_compare_func that orders pointers to variables A and B @@ -246,7 +229,7 @@ hash_var_ptr_by_name (const void *v_, const void *aux UNUSED) { struct variable *const *v = v_; - return hash_case_string (var_get_name (*v), 0); + return utf8_hash_case_string (var_get_name (*v), 0); } /* Returns the type of variable V. */ @@ -263,22 +246,25 @@ var_get_width (const struct variable *v) return v->width; } -/* Changes the width of V to NEW_WIDTH. - This function should be used cautiously. */ void -var_set_width (struct variable *v, int new_width) +var_set_width_and_formats (struct variable *v, int new_width, + const struct fmt_spec *print, const struct fmt_spec *write) { - const int old_width = v->width; + struct variable *ov; + unsigned int traits = 0; - if (old_width == new_width) - return; + ov = var_clone (v); - if (mv_is_resizable (&v->miss, new_width)) - mv_resize (&v->miss, new_width); - else + if (var_has_missing_values (v)) { - mv_destroy (&v->miss); - mv_init (&v->miss, new_width); + if (mv_is_resizable (&v->miss, new_width)) + mv_resize (&v->miss, new_width); + else + { + mv_destroy (&v->miss); + mv_init (&v->miss, new_width); + } + traits |= VAR_TRAIT_MISSING_VALUES; } if (v->val_labs != NULL) @@ -290,16 +276,49 @@ var_set_width (struct variable *v, int new_width) val_labs_destroy (v->val_labs); v->val_labs = NULL; } + traits |= VAR_TRAIT_VALUE_LABELS; } - fmt_resize (&v->print, new_width); - fmt_resize (&v->write, new_width); + if (fmt_resize (&v->print, new_width)) + traits |= VAR_TRAIT_PRINT_FORMAT; + + if (fmt_resize (&v->write, new_width)) + traits |= VAR_TRAIT_WRITE_FORMAT; v->width = new_width; - dict_var_resized (v, old_width); - dict_var_changed (v); + traits |= VAR_TRAIT_WIDTH; + + if (print) + { + var_set_print_format_quiet (v, print); + traits |= VAR_TRAIT_PRINT_FORMAT; + } + + if (write) + { + var_set_write_format_quiet (v, write); + traits |= VAR_TRAIT_WRITE_FORMAT; + } + + dict_var_changed (v, traits, ov); } +/* Changes the width of V to NEW_WIDTH. + This function should be used cautiously. */ +void +var_set_width (struct variable *v, int new_width) +{ + const int old_width = v->width; + + if (old_width == new_width) + return; + + var_set_width_and_formats (v, new_width, NULL, NULL); +} + + + + /* Returns true if variable V is numeric, false otherwise. */ bool var_is_numeric (const struct variable *v) @@ -326,8 +345,8 @@ var_get_missing_values (const struct variable *v) width or at least resizable to V's width. If MISS is null, then V's missing values, if any, are cleared. */ -void -var_set_missing_values (struct variable *v, const struct missing_values *miss) +static void +var_set_missing_values_quiet (struct variable *v, const struct missing_values *miss) { if (miss != NULL) { @@ -338,8 +357,18 @@ var_set_missing_values (struct variable *v, const struct missing_values *miss) } else mv_clear (&v->miss); +} - dict_var_changed (v); +/* Sets variable V's missing values to MISS, which must be of V's + width or at least resizable to V's width. + If MISS is null, then V's missing values, if any, are + cleared. */ +void +var_set_missing_values (struct variable *v, const struct missing_values *miss) +{ + struct variable *ov = var_clone (v); + var_set_missing_values_quiet (v, miss); + dict_var_changed (v, VAR_TRAIT_MISSING_VALUES, ov); } /* Sets variable V to have no user-missing values. */ @@ -404,8 +433,8 @@ var_has_value_labels (const struct variable *v) which must have a width equal to V's width or one that can be changed to V's width. If VLS is null, then V's value labels, if any, are removed. */ -void -var_set_value_labels (struct variable *v, const struct val_labs *vls) +static void +var_set_value_labels_quiet (struct variable *v, const struct val_labs *vls) { val_labs_destroy (v->val_labs); v->val_labs = NULL; @@ -415,10 +444,23 @@ var_set_value_labels (struct variable *v, const struct val_labs *vls) assert (val_labs_can_set_width (vls, v->width)); v->val_labs = val_labs_clone (vls); val_labs_set_width (v->val_labs, v->width); - dict_var_changed (v); } } + +/* Sets variable V's value labels to a copy of VLS, + which must have a width equal to V's width or one that can be + changed to V's width. + If VLS is null, then V's value labels, if any, are removed. */ +void +var_set_value_labels (struct variable *v, const struct val_labs *vls) +{ + struct variable *ov = var_clone (v); + var_set_value_labels_quiet (v, vls); + dict_var_changed (v, VAR_TRAIT_LABEL, ov); +} + + /* Makes sure that V has a set of value labels, by assigning one to it if necessary. */ static void @@ -532,17 +574,28 @@ var_get_print_format (const struct variable *v) valid format specification for a variable of V's width (ordinarily an output format, but input formats are not rejected). */ -void -var_set_print_format (struct variable *v, const struct fmt_spec *print) +static void +var_set_print_format_quiet (struct variable *v, const struct fmt_spec *print) { if (!fmt_equal (&v->print, print)) { assert (fmt_check_width_compat (print, v->width)); v->print = *print; - dict_var_changed (v); } } +/* Sets V's print format specification to PRINT, which must be a + valid format specification for a variable of V's width + (ordinarily an output format, but input formats are not + rejected). */ +void +var_set_print_format (struct variable *v, const struct fmt_spec *print) +{ + struct variable *ov = var_clone (v); + var_set_print_format_quiet (v, print); + dict_var_changed (v, VAR_TRAIT_PRINT_FORMAT, ov); +} + /* Returns V's write format specification. */ const struct fmt_spec * var_get_write_format (const struct variable *v) @@ -554,17 +607,29 @@ var_get_write_format (const struct variable *v) valid format specification for a variable of V's width (ordinarily an output format, but input formats are not rejected). */ -void -var_set_write_format (struct variable *v, const struct fmt_spec *write) +static void +var_set_write_format_quiet (struct variable *v, const struct fmt_spec *write) { if (!fmt_equal (&v->write, write)) { assert (fmt_check_width_compat (write, v->width)); v->write = *write; - dict_var_changed (v); } } +/* Sets V's write format specification to WRITE, which must be a + valid format specification for a variable of V's width + (ordinarily an output format, but input formats are not + rejected). */ +void +var_set_write_format (struct variable *v, const struct fmt_spec *write) +{ + struct variable *ov = var_clone (v); + var_set_write_format_quiet (v, write); + dict_var_changed (v, VAR_TRAIT_WRITE_FORMAT, ov); +} + + /* Sets V's print and write format specifications to FORMAT, which must be a valid format specification for a variable of V's width (ordinarily an output format, but input formats are @@ -572,8 +637,10 @@ var_set_write_format (struct variable *v, const struct fmt_spec *write) void var_set_both_formats (struct variable *v, const struct fmt_spec *format) { - var_set_print_format (v, format); - var_set_write_format (v, format); + struct variable *ov = var_clone (v); + var_set_print_format_quiet (v, format); + var_set_write_format_quiet (v, format); + dict_var_changed (v, VAR_TRAIT_PRINT_FORMAT | VAR_TRAIT_WRITE_FORMAT, ov); } /* Returns the default print and write format for a variable of @@ -650,8 +717,8 @@ var_get_label (const struct variable *v) var_get_encoding()). If LABEL fits within this limit, this function returns true. Otherwise, the variable label is set to a truncated value, this function returns false and, if ISSUE_WARNING is true, issues a warning. */ -bool -var_set_label (struct variable *v, const char *label, bool issue_warning) +static bool +var_set_label_quiet (struct variable *v, const char *label, bool issue_warning) { bool truncated = false; @@ -686,11 +753,32 @@ var_set_label (struct variable *v, const char *label, bool issue_warning) ds_destroy (&v->name_and_label); ds_init_empty (&v->name_and_label); - dict_var_changed (v); + return truncated; +} + + + +/* Sets V's variable label to UTF-8 encoded string LABEL, stripping off leading + and trailing white space. If LABEL is a null pointer or if LABEL is an + empty string (after stripping white space), then V's variable label (if any) + is removed. + + Variable labels are limited to 255 bytes in V's encoding (as returned by + var_get_encoding()). If LABEL fits within this limit, this function returns + true. Otherwise, the variable label is set to a truncated value, this + function returns false and, if ISSUE_WARNING is true, issues a warning. */ +bool +var_set_label (struct variable *v, const char *label, bool issue_warning) +{ + struct variable *ov = var_clone (v); + bool truncated = var_set_label_quiet (v, label, issue_warning); + + dict_var_changed (v, VAR_TRAIT_LABEL, ov); return truncated; } + /* Removes any variable label from V. */ void var_clear_label (struct variable *v) @@ -734,6 +822,27 @@ measure_to_string (enum measure m) } } +/* Returns a string version of measurement level M, for use in PSPP command + syntax. */ +const char * +measure_to_syntax (enum measure m) +{ + switch (m) + { + case MEASURE_NOMINAL: + return "NOMINAL"; + + case MEASURE_ORDINAL: + return "ORDINAL"; + + case MEASURE_SCALE: + return "SCALE"; + + default: + return "Invalid"; + } +} + /* Returns V's measurement level. */ enum measure var_get_measure (const struct variable *v) @@ -742,14 +851,24 @@ var_get_measure (const struct variable *v) } /* Sets V's measurement level to MEASURE. */ -void -var_set_measure (struct variable *v, enum measure measure) +static void +var_set_measure_quiet (struct variable *v, enum measure measure) { assert (measure_is_valid (measure)); v->measure = measure; - dict_var_changed (v); } + +/* Sets V's measurement level to MEASURE. */ +void +var_set_measure (struct variable *v, enum measure measure) +{ + struct variable *ov = var_clone (v); + var_set_measure_quiet (v, measure); + dict_var_changed (v, VAR_TRAIT_MEASURE, ov); +} + + /* Returns the default measurement level for a variable of the given TYPE, as set by var_create. The return value can be used to reset a variable's measurement level to the @@ -760,6 +879,109 @@ var_default_measure (enum val_type type) return type == VAL_NUMERIC ? MEASURE_SCALE : MEASURE_NOMINAL; } +/* Returns true if M is a valid variable role, + false otherwise. */ +bool +var_role_is_valid (enum var_role role) +{ + switch (role) + { + case ROLE_NONE: + case ROLE_INPUT: + case ROLE_OUTPUT: + case ROLE_BOTH: + case ROLE_PARTITION: + case ROLE_SPLIT: + return true; + + default: + return false; + } +} + +/* Returns a string version of ROLE, for display to a user. */ +const char * +var_role_to_string (enum var_role role) +{ + switch (role) + { + case ROLE_INPUT: + return _("Input"); + + case ROLE_OUTPUT: + return _("Output"); + + case ROLE_BOTH: + return _("Both"); + + case ROLE_NONE: + return _("None"); + + case ROLE_PARTITION: + return _("Partition"); + + case ROLE_SPLIT: + return _("Split"); + + default: + return "Invalid"; + } +} + +/* Returns a string version of ROLE, for use in PSPP comamnd syntax. */ +const char * +var_role_to_syntax (enum var_role role) +{ + switch (role) + { + case ROLE_INPUT: + return "INPUT"; + + case ROLE_OUTPUT: + return "TARGET"; + + case ROLE_BOTH: + return "BOTH"; + + case ROLE_NONE: + return "NONE"; + + case ROLE_PARTITION: + return "PARTITION"; + + case ROLE_SPLIT: + return "SPLIT"; + + default: + return ""; + } +} + +/* Returns V's role. */ +enum var_role +var_get_role (const struct variable *v) +{ + return v->role; +} + +/* Sets V's role to ROLE. */ +static void +var_set_role_quiet (struct variable *v, enum var_role role) +{ + assert (var_role_is_valid (role)); + v->role = role; +} + + +/* Sets V's role to ROLE. */ +void +var_set_role (struct variable *v, enum var_role role) +{ + struct variable *ov = var_clone (v); + var_set_role_quiet (v, role); + dict_var_changed (v, VAR_TRAIT_ROLE, ov); +} + /* Returns V's display width, which applies only to GUIs. */ int var_get_display_width (const struct variable *v) @@ -768,17 +990,24 @@ var_get_display_width (const struct variable *v) } /* Sets V's display width to DISPLAY_WIDTH. */ -void -var_set_display_width (struct variable *v, int new_width) +static void +var_set_display_width_quiet (struct variable *v, int new_width) { if (v->display_width != new_width) { v->display_width = new_width; - dict_var_display_width_changed (v); - dict_var_changed (v); } } +void +var_set_display_width (struct variable *v, int new_width) +{ + struct variable *ov = var_clone (v); + var_set_display_width_quiet (v, new_width); + dict_var_changed (v, VAR_TRAIT_DISPLAY_WIDTH, ov); +} + + /* Returns the default display width for a variable of the given WIDTH, as set by var_create. The return value can be used to reset a variable's display width to the default. */ @@ -816,6 +1045,26 @@ alignment_to_string (enum alignment a) } } +/* Returns a string version of alignment A, for use in PSPP command syntax. */ +const char * +alignment_to_syntax (enum alignment a) +{ + switch (a) + { + case ALIGN_LEFT: + return "LEFT"; + + case ALIGN_RIGHT: + return "RIGHT"; + + case ALIGN_CENTRE: + return "CENTER"; + + default: + return "Invalid"; + } +} + /* Returns V's display alignment, which applies only to GUIs. */ enum alignment var_get_alignment (const struct variable *v) @@ -824,14 +1073,23 @@ var_get_alignment (const struct variable *v) } /* Sets V's display alignment to ALIGNMENT. */ -void -var_set_alignment (struct variable *v, enum alignment alignment) +static void +var_set_alignment_quiet (struct variable *v, enum alignment alignment) { assert (alignment_is_valid (alignment)); v->alignment = alignment; - dict_var_changed (v); } +/* Sets V's display alignment to ALIGNMENT. */ +void +var_set_alignment (struct variable *v, enum alignment alignment) +{ + struct variable *ov = var_clone (v); + var_set_alignment_quiet (v, alignment); + dict_var_changed (v, VAR_TRAIT_ALIGNMENT, ov); +} + + /* Returns the default display alignment for a variable of the given TYPE, as set by var_create. The return value can be used to reset a variable's display alignment to the default. */ @@ -853,14 +1111,24 @@ var_get_leave (const struct variable *v) } /* Sets V's leave setting to LEAVE. */ -void -var_set_leave (struct variable *v, bool leave) +static void +var_set_leave_quiet (struct variable *v, bool leave) { assert (leave || !var_must_leave (v)); v->leave = leave; - dict_var_changed (v); } + +/* Sets V's leave setting to LEAVE. */ +void +var_set_leave (struct variable *v, bool leave) +{ + struct variable *ov = var_clone (v); + var_set_leave_quiet (v, leave); + dict_var_changed (v, VAR_TRAIT_LEAVE, ov); +} + + /* Returns true if V must be left from case to case, false if it can be set either way. */ bool @@ -904,6 +1172,8 @@ var_get_short_name (const struct variable *var, size_t idx) void var_set_short_name (struct variable *var, size_t idx, const char *short_name) { + struct variable *ov = var_clone (var); + assert (short_name == NULL || id_is_plausible (short_name, false)); /* Clear old short name numbered IDX, if any. */ @@ -926,11 +1196,10 @@ var_set_short_name (struct variable *var, size_t idx, const char *short_name) for (i = old_cnt; i < var->short_name_cnt; i++) var->short_names[i] = NULL; } - var->short_names[idx] = xstrdup (short_name); - str_uppercase (var->short_names[idx]); + var->short_names[idx] = utf8_to_upper (short_name); } - dict_var_changed (var); + dict_var_changed (var, VAR_TRAIT_NAME, ov); } /* Clears V's short names. */ @@ -969,63 +1238,6 @@ var_get_case_index (const struct variable *v) return vardict_get_case_index (v->vardict); } -/* Returns V's auxiliary data, or a null pointer if none has been - attached. */ -void * -var_get_aux (const struct variable *v) -{ - return v->aux; -} - -/* Assign auxiliary data AUX to variable V, which must not - already have auxiliary data. Before V's auxiliary data is - cleared, AUX_DTOR(V) will be called. (var_dtor_free, below, - may be appropriate for use as AUX_DTOR.) */ -void * -var_attach_aux (const struct variable *v_, - void *aux, void (*aux_dtor) (struct variable *)) -{ - struct variable *v = CONST_CAST (struct variable *, v_); - assert (v->aux == NULL); - assert (aux != NULL); - v->aux = aux; - v->aux_dtor = aux_dtor; - return aux; -} - -/* Remove auxiliary data, if any, from V, and return it, without - calling any associated destructor. */ -void * -var_detach_aux (struct variable *v) -{ - void *aux = v->aux; - assert (aux != NULL); - v->aux = NULL; - return aux; -} - -/* Clears auxiliary data, if any, from V, and calls any - associated destructor. */ -void -var_clear_aux (struct variable *v) -{ - if (v->aux != NULL) - { - if (v->aux_dtor != NULL) - v->aux_dtor (v); - v->aux = NULL; - } -} - -/* This function is appropriate for use an auxiliary data - destructor (passed as AUX_DTOR to var_attach_aux()) for the - case where the auxiliary data should be passed to free(). */ -void -var_dtor_free (struct variable *v) -{ - free (v->aux); -} - /* Returns variable V's attribute set. The caller may examine or modify the attribute set, but must not destroy it. Destroying V, or calling var_set_attributes() on V, will also destroy its @@ -1037,13 +1249,23 @@ var_get_attributes (const struct variable *v) } /* Replaces variable V's attributes set by a copy of ATTRS. */ -void -var_set_attributes (struct variable *v, const struct attrset *attrs) +static void +var_set_attributes_quiet (struct variable *v, const struct attrset *attrs) { attrset_destroy (&v->attributes); attrset_clone (&v->attributes, attrs); } +/* Replaces variable V's attributes set by a copy of ATTRS. */ +void +var_set_attributes (struct variable *v, const struct attrset *attrs) +{ + struct variable *ov = var_clone (v); + var_set_attributes_quiet (v, attrs); + dict_var_changed (v, VAR_TRAIT_ATTRIBUTES, ov); +} + + /* Returns true if V has any custom attributes, false if it has none. */ bool var_has_attributes (const struct variable *v) @@ -1051,6 +1273,40 @@ var_has_attributes (const struct variable *v) return attrset_count (&v->attributes) > 0; } + +/* Creates and returns a clone of OLD_VAR. Most properties of + the new variable are copied from OLD_VAR, except: + + - The variable's short name is not copied, because there is + no reason to give a new variable with potentially a new + name the same short name. + + - The new variable is not added to OLD_VAR's dictionary by + default. Use dict_clone_var, instead, to do that. +*/ +struct variable * +var_clone (const struct variable *old_var) +{ + struct variable *new_var = var_create (var_get_name (old_var), + var_get_width (old_var)); + + var_set_missing_values_quiet (new_var, var_get_missing_values (old_var)); + var_set_print_format_quiet (new_var, var_get_print_format (old_var)); + var_set_write_format_quiet (new_var, var_get_write_format (old_var)); + var_set_value_labels_quiet (new_var, var_get_value_labels (old_var)); + var_set_label_quiet (new_var, var_get_label (old_var), false); + var_set_measure_quiet (new_var, var_get_measure (old_var)); + var_set_role_quiet (new_var, var_get_role (old_var)); + var_set_display_width_quiet (new_var, var_get_display_width (old_var)); + var_set_alignment_quiet (new_var, var_get_alignment (old_var)); + var_set_leave_quiet (new_var, var_get_leave (old_var)); + var_set_attributes_quiet (new_var, var_get_attributes (old_var)); + + return new_var; +} + + + /* Returns the encoding of values of variable VAR. (This is actually a property of the dictionary.) Returns null if no specific encoding has been set. */