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+ id 1SpRYU-0004sR-1R; Thu, 12 Jul 2012 18:08:14 -0400\r
+Date: Thu, 12 Jul 2012 18:08:14 -0400\r
+From: Austin Clements <amdragon@MIT.EDU>\r
+To: craven@gmx.net\r
+Subject: Re: [PATCH v4 1/3] Add support for structured output formatters.\r
+Message-ID: <20120712220814.GJ7332@mit.edu>\r
+References: <87d34hsdx8.fsf@awakening.csail.mit.edu>\r
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+\r
+Quoth craven@gmx.net on Jul 12 at 9:43 am:\r
+> This patch adds a new type sprinter_t, which is used for structured\r
+> formatting, e.g. JSON or S-Expressions. The structure printer is the\r
+> code from Austin Clements (id:87d34hsdx8.fsf@awakening.csail.mit.edu).\r
+> \r
+> The structure printer contains the following function pointers:\r
+> \r
+> /* start a new map/dictionary structure.\r
+> */\r
+> void (*begin_map) (struct sprinter *);\r
+> \r
+> /* start a new list/array structure\r
+> */\r
+> void (*begin_list) (struct sprinter *);\r
+> \r
+> /* end the last opened list or map structure\r
+> */\r
+> void (*end) (struct sprinter *);\r
+> \r
+> /* print one string/integer/boolean/null element (possibly inside a\r
+> * list or map\r
+> */\r
+> void (*string) (struct sprinter *, const char *);\r
+> void (*integer) (struct sprinter *, int);\r
+> void (*boolean) (struct sprinter *, notmuch_bool_t);\r
+> void (*null) (struct sprinter *);\r
+> \r
+> /* print the key of a map's key/value pair.\r
+> */\r
+> void (*map_key) (struct sprinter *, const char *);\r
+> \r
+> /* print a frame delimiter (such as a newline or extra whitespace)\r
+> */\r
+> void (*frame) (struct sprinter *);\r
+> \r
+> The printer can (and should) use internal state to insert delimiters and\r
+> syntax at the correct places.\r
+> \r
+> Example:\r
+> \r
+> format->begin_map(format);\r
+> format->map_key(format, "foo");\r
+> format->begin_list(format);\r
+> format->integer(format, 1);\r
+> format->integer(format, 2);\r
+> format->integer(format, 3);\r
+> format->end(format);\r
+> format->map_key(format, "bar");\r
+> format->begin_map(format);\r
+> format->map_key(format, "baaz");\r
+> format->string(format, "hello world");\r
+> format->end(format);\r
+> format->end(format);\r
+> \r
+> would output JSON as follows:\r
+> \r
+> {"foo": [1, 2, 3], "bar": { "baaz": "hello world"}}\r
+> ---\r
+> sprinter.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++\r
+> 1 file changed, 49 insertions(+)\r
+> create mode 100644 sprinter.h\r
+> \r
+> diff --git a/sprinter.h b/sprinter.h\r
+> new file mode 100644\r
+> index 0000000..1dad9a0\r
+> --- /dev/null\r
+> +++ b/sprinter.h\r
+> @@ -0,0 +1,49 @@\r
+> +#ifndef NOTMUCH_SPRINTER_H\r
+> +#define NOTMUCH_SPRINTER_H\r
+> +\r
+> +/* for notmuch_bool_t */\r
+> +#include "notmuch-client.h"\r
+> +\r
+> +/* Structure printer interface */\r
+> +typedef struct sprinter\r
+> +{\r
+> + /* start a new map/dictionary structure.\r
+> + */\r
+> + void (*begin_map) (struct sprinter *);\r
+> +\r
+> + /* start a new list/array structure\r
+> + */\r
+> + void (*begin_list) (struct sprinter *);\r
+> +\r
+> + /* end the last opened list or map structure\r
+> + */\r
+> + void (*end) (struct sprinter *);\r
+> +\r
+> + /* print one string/integer/boolean/null element (possibly inside a\r
+> + * list or map\r
+> + */\r
+> + void (*string) (struct sprinter *, const char *);\r
+\r
+Oh, also, the documentation for string should mention the string\r
+argument should be UTF-8 encoded.\r
+\r
+> + void (*integer) (struct sprinter *, int);\r
+> + void (*boolean) (struct sprinter *, notmuch_bool_t);\r
+> + void (*null) (struct sprinter *);\r
+> +\r
+> + /* print the key of a map's key/value pair.\r
+> + */\r
+> + void (*map_key) (struct sprinter *, const char *);\r
+> +\r
+> + /* print a frame delimiter (such as a newline or extra whitespace)\r
+> + */\r
+> + void (*frame) (struct sprinter *);\r
+> +} sprinter_t;\r
+> +\r
+> +/* Create a new structure printer that emits JSON */\r
+> +struct sprinter *\r
+> +sprinter_json_new(const void *ctx, FILE *stream);\r
+> +\r
+> +/* A dummy structure printer that signifies that standard text output is\r
+> + * to be used instead of any structured format.\r
+> + */\r
+> +struct sprinter *\r
+> +sprinter_text;\r
+> +\r
+> +#endif // NOTMUCH_SPRINTER_H\r
projects / notmuch-archives.git / commitdiff