1 #ifndef NOTMUCH_SPRINTER_H
2 #define NOTMUCH_SPRINTER_H
4 /* Necessary for bool */
5 #include "notmuch-client.h"
7 /* Structure printer interface. This is used to create output
8 * structured as maps (with key/value pairs), lists and primitives
9 * (strings, integers and booleans).
11 typedef struct sprinter {
12 /* Start a new map/dictionary structure. This should be followed by
13 * a sequence of alternating calls to map_key and one of the
14 * value-printing functions until the map is ended by end.
16 void (*begin_map)(struct sprinter *);
18 /* Start a new list/array structure.
20 void (*begin_list)(struct sprinter *);
22 /* End the last opened list or map structure.
24 void (*end)(struct sprinter *);
26 /* Print one string/integer/boolean/null element (possibly inside
27 * a list or map, followed or preceded by separators). For string
28 * and string_len, the char * must be UTF-8 encoded. string_len
29 * allows non-terminated strings and strings with embedded NULs
30 * (though the handling of the latter is format-dependent). For
31 * string (but not string_len) the string pointer passed may be
34 void (*string)(struct sprinter *, const char *);
35 void (*string_len)(struct sprinter *, const char *, size_t);
36 void (*integer)(struct sprinter *, int64_t);
37 void (*boolean)(struct sprinter *, bool);
38 void (*null)(struct sprinter *);
40 /* Print the key of a map's key/value pair. The char * must be UTF-8
43 void (*map_key)(struct sprinter *, const char *);
45 /* Insert a separator (usually extra whitespace). For the text
46 * printers, this is a syntactic separator. For the structured
47 * printers, this is for improved readability without affecting
48 * the abstract syntax of the structure being printed. For JSON,
49 * this could simply be a line break.
51 void (*separator)(struct sprinter *);
53 /* Set the current string prefix. This only affects the text
54 * printer, which will print this string, followed by a colon,
55 * before any string. For other printers, this does nothing.
57 void (*set_prefix)(struct sprinter *, const char *);
59 /* True if this is the special-cased plain text printer.
65 /* Create a new unstructured printer that emits the default text format
66 * for "notmuch search". */
68 sprinter_text_create (const void *ctx, FILE *stream);
70 /* Create a new unstructured printer that emits the text format for
71 * "notmuch search", with each field separated by a null character
72 * instead of the newline character. */
74 sprinter_text0_create (const void *ctx, FILE *stream);
76 /* Create a new structure printer that emits JSON. */
78 sprinter_json_create (const void *ctx, FILE *stream);
80 /* Create a new structure printer that emits S-Expressions. */
82 sprinter_sexp_create (const void *ctx, FILE *stream);
84 #endif // NOTMUCH_SPRINTER_H