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14883b0700
This method allows callers to output strings with specific lengths. It's useful both for strings with embedded NULs (which JSON can represent, though parser support is apparently spotty), and non-terminated strings.
133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
#include <stdbool.h>
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#include <stdio.h>
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#include <talloc.h>
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#include "sprinter.h"
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/* "Structured printer" interface for unstructured text printing.
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* Note that --output=summary is dispatched and formatted in
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* notmuch-search.c, the code in this file is only used for all other
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* output types.
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*/
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struct sprinter_text {
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struct sprinter vtable;
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FILE *stream;
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/* The current prefix to be printed with string/integer/boolean
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* data.
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*/
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const char *current_prefix;
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/* A flag to indicate if this is the first tag. Used in list of tags
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* for summary.
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*/
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notmuch_bool_t first_tag;
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};
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static void
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text_string_len (struct sprinter *sp, const char *val, size_t len)
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{
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struct sprinter_text *sptxt = (struct sprinter_text *) sp;
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if (sptxt->current_prefix != NULL)
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fprintf (sptxt->stream, "%s:", sptxt->current_prefix);
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fwrite (val, len, 1, sptxt->stream);
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}
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static void
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text_string (struct sprinter *sp, const char *val)
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{
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text_string_len (sp, val, strlen (val));
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}
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static void
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text_integer (struct sprinter *sp, int val)
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{
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struct sprinter_text *sptxt = (struct sprinter_text *) sp;
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fprintf (sptxt->stream, "%d", val);
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}
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static void
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text_boolean (struct sprinter *sp, notmuch_bool_t val)
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{
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struct sprinter_text *sptxt = (struct sprinter_text *) sp;
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fputs (val ? "true" : "false", sptxt->stream);
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}
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static void
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text_separator (struct sprinter *sp)
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{
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struct sprinter_text *sptxt = (struct sprinter_text *) sp;
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fputc ('\n', sptxt->stream);
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}
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static void
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text_set_prefix (struct sprinter *sp, const char *prefix)
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{
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struct sprinter_text *sptxt = (struct sprinter_text *) sp;
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sptxt->current_prefix = prefix;
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}
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/* The structure functions begin_map, begin_list, end and map_key
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* don't do anything in the text formatter.
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*/
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static void
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text_begin_map (unused (struct sprinter *sp))
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{
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}
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static void
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text_begin_list (unused (struct sprinter *sp))
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{
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}
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static void
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text_end (unused (struct sprinter *sp))
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{
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}
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static void
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text_null (unused (struct sprinter *sp))
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{
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}
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static void
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text_map_key (unused (struct sprinter *sp), unused (const char *key))
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{
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}
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struct sprinter *
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sprinter_text_create (const void *ctx, FILE *stream)
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{
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static const struct sprinter_text template = {
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.vtable = {
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.begin_map = text_begin_map,
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.begin_list = text_begin_list,
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.end = text_end,
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.string = text_string,
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.string_len = text_string_len,
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.integer = text_integer,
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.boolean = text_boolean,
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.null = text_null,
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.map_key = text_map_key,
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.separator = text_separator,
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.set_prefix = text_set_prefix,
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.is_text_printer = TRUE,
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},
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};
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struct sprinter_text *res;
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res = talloc (ctx, struct sprinter_text);
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if (! res)
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return NULL;
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*res = template;
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res->stream = stream;
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return &res->vtable;
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}
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