91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __BTRFS_FORMAT_OUTPUT_H__
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#define __BTRFS_FORMAT_OUTPUT_H__
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struct rowspec {
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/* Identifier for the row */
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const char *key;
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/*
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* Format to print:
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* - starting with %: must be a valid printf spec
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* (values: va_args)
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* - uuid: format UUID as text
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* (value: u8 *uuid)
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* - list: print list opening bracket [
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* (values printed separately)
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* - map: start a new group, opens {
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* (values printed separately)
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* - size: pretty print size according to
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* (values: u64 size, u32 unit_type)
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* - size-or-none: pretty print non-zero values, "-" otherwise
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* (values: same as "size")
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* - qgroupid: print qgroup from separate level and id
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* (values: u64 level, u64 id)
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*/
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const char *fmt;
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/* String to print in format:text */
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const char *out_text;
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/* String to print in format:json, is quoted */
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const char *out_json;
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};
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#define ROWSPEC_END { .key = NULL },
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#define JSON_NESTING_LIMIT 16
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/*
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* Nested types
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*/
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enum json_type {
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JSON_TYPE_INVALID,
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JSON_TYPE_MAP,
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JSON_TYPE_ARRAY,
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};
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struct format_ctx {
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/* Preferred width of the first column with key (format: text) */
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int width;
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/* Initial indentation before the first column (format: text) */
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int indent;
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/* Nesting of groups like lists or maps (format: json) */
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int depth;
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/* Array of named output fields as defined by the command */
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const struct rowspec *rowspec;
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char jtype[JSON_NESTING_LIMIT];
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enum json_type memb[JSON_NESTING_LIMIT];
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};
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void fmt_start(struct format_ctx *fctx, const struct rowspec *spec, int width,
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int indent);
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void fmt_end(struct format_ctx *fctx);
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void fmt_print(struct format_ctx *fctx, const char* key, ...);
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void fmt_start_list_value(struct format_ctx *fctx);
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void fmt_end_list_value(struct format_ctx *fctx);
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void fmt_start_value(struct format_ctx *fctx, const struct rowspec *row);
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void fmt_end_value(struct format_ctx *fctx, const struct rowspec *row);
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void fmt_print_start_group(struct format_ctx *fctx, const char *name,
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enum json_type jtype);
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void fmt_print_end_group(struct format_ctx *fctx, const char *name);
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#endif
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