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static enum zsv_select_column_index_selection_type zsv_select_column_index_selection(const unsigned char *arg,
unsigned *lo, unsigned *hi);
static inline void zsv_select_add_exclusion(struct zsv_select_data *data, const char *name) {
if (data->exclusion_count < MAX_EXCLUSIONS)
data->exclusions[data->exclusion_count++] = (const unsigned char *)name;
}
static inline unsigned char *zsv_select_get_header_name(struct zsv_select_data *data, unsigned in_ix) {
if (in_ix < data->header_name_count)
return data->header_names[in_ix];
return NULL;
}
static inline char zsv_select_excluded_current_header_name(struct zsv_select_data *data, unsigned in_ix) {
if (data->exclusion_count) {
if (data->use_header_indexes) {
for (unsigned int ix = 0; ix < data->exclusion_count; ix++) {
unsigned i, j;
switch (zsv_select_column_index_selection(data->exclusions[ix], &i, &j)) {
case zsv_select_column_index_selection_type_none:
// not expected!
break;
case zsv_select_column_index_selection_type_single:
if (in_ix + 1 == i)
return 1;
break;
case zsv_select_column_index_selection_type_range:
if (i <= in_ix + 1 && in_ix + 1 <= j)
return 1;
break;
case zsv_select_column_index_selection_type_lower_bounded:
if (i <= in_ix + 1)
return 1;
break;
}
}
} else {
unsigned char *header_name = zsv_select_get_header_name(data, in_ix);
if (header_name) {
for (unsigned int i = 0; i < data->exclusion_count; i++)
if (!zsv_stricmp(header_name, data->exclusions[i]))
return 1;
}
}
}
return 0;
}
// zsv_select_find_header(): return 1-based index, or 0 if not found
static int zsv_select_find_header(struct zsv_select_data *data, const unsigned char *header_name) {
if (header_name) {
for (unsigned int i = 0; i < data->output_cols_count; i++) {
unsigned char *prior_header_name = zsv_select_get_header_name(data, data->out2in[i].ix);
if (prior_header_name && !zsv_stricmp(header_name, prior_header_name))
return i + 1;
}
}
return 0;
}
static int zsv_select_add_output_col(struct zsv_select_data *data, unsigned in_ix) {
int err = 0;
if (data->output_cols_count < data->opts->max_columns) {
int found = zsv_select_find_header(data, zsv_select_get_header_name(data, in_ix));
if (data->distinct && found) {
if (data->distinct == ZSV_SELECT_DISTINCT_MERGE) {
// add this index
struct zsv_select_uint_list *ix = calloc(1, sizeof(*ix));
if (!ix)
err = zsv_printerr(1, "Out of memory!\n");
else {
ix->value = in_ix;
if (!data->out2in[found - 1].merge.indexes)
data->out2in[found - 1].merge.indexes = ix;
else
*data->out2in[found - 1].merge.last_index = ix;
data->out2in[found - 1].merge.last_index = &ix->next;
}
}
return err;
}
if (zsv_select_excluded_current_header_name(data, in_ix))
return err;
data->out2in[data->output_cols_count++].ix = in_ix;
}
return err;
}
// not very fast, but we don't need it to be
static inline unsigned int str_array_ifind(const unsigned char *needle, unsigned char *haystack[], unsigned hay_count) {
for (unsigned int i = 0; i < hay_count; i++) {
if (!(needle && *needle) && !(haystack[i] && *haystack[i]))
return i + 1;
if (!(needle && *needle && haystack[i] && *haystack[i]))
continue;
if (!zsv_stricmp(needle, haystack[i]))
return i + 1;
}
return 0;
}
static int zsv_select_set_output_columns(struct zsv_select_data *data) {
int err = 0;
unsigned int header_name_count = data->header_name_count;
if (!data->col_argc) {
for (unsigned int i = 0; !err && i < header_name_count; i++)
err = zsv_select_add_output_col(data, i);
} else if (data->use_header_indexes) {
for (int arg_i = 0; !err && arg_i < data->col_argc; arg_i++) {
const char *arg = data->col_argv[arg_i];
unsigned i, j;
switch (zsv_select_column_index_selection((const unsigned char *)arg, &i, &j)) {
case zsv_select_column_index_selection_type_none:
zsv_printerr(1, "Invalid column index: %s", arg);
err = -1;
break;
case zsv_select_column_index_selection_type_single:
err = zsv_select_add_output_col(data, i - 1);
break;
case zsv_select_column_index_selection_type_range:
while (i <= j && i < data->opts->max_columns) {
err = zsv_select_add_output_col(data, i - 1);
i++;
}
break;
case zsv_select_column_index_selection_type_lower_bounded:
if (i) {
for (unsigned int k = i - 1; !err && k < header_name_count; k++)
err = zsv_select_add_output_col(data, k);
}
break;
}
}
} else { // using header names
for (int arg_i = 0; !err && arg_i < data->col_argc; arg_i++) {
// find the location of the matching header name, if any
unsigned int in_pos =
str_array_ifind((const unsigned char *)data->col_argv[arg_i], data->header_names, header_name_count);
if (!in_pos) {
fprintf(stderr, "Column %s not found\n", data->col_argv[arg_i]);
err = -1;
} else
err = zsv_select_add_output_col(data, in_pos - 1);
}
}
return err;
}
static enum zsv_select_column_index_selection_type zsv_select_column_index_selection(const unsigned char *arg,
unsigned *lo, unsigned *hi) {
enum zsv_select_column_index_selection_type result = zsv_select_column_index_selection_type_none;
unsigned int i = 0;
unsigned int j = 0;
int n = 0;
int k = sscanf((const char *)arg, "%u-%u%n", &i, &j, &n);
if (k == 2) {
if (n >= 0 && (size_t)n == strlen((const char *)arg) && i > 0 && j >= i)
result = zsv_select_column_index_selection_type_range;
} else {
k = sscanf((const char *)arg, "%u%n", &i, &n);
if (k == 1 && n >= 0 && (size_t)n == strlen((const char *)arg)) {
if (i > 0)
result = zsv_select_column_index_selection_type_single;
} else {
k = sscanf((const char *)arg, "%u-%n", &i, &n);
if (k == 1 && n >= 0 && (size_t)n == strlen((const char *)arg)) {
if (i > 0) {
result = zsv_select_column_index_selection_type_lower_bounded;
j = 0;
}
}
}
}
if (lo)
*lo = i;
if (hi)
*hi = j;
return result;
}
// zsv_select_check_exclusions_are_indexes(): return err
static int zsv_select_check_exclusions_are_indexes(struct zsv_select_data *data) {
int err = 0;
for (unsigned int e = 0; e < data->exclusion_count; e++) {
const unsigned char *arg = data->exclusions[e];
if (zsv_select_column_index_selection(arg, NULL, NULL) == zsv_select_column_index_selection_type_none)
err = zsv_printerr(1, "Invalid column index: %s", arg);
}
return err;
}
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