commit 2421c0ce4f3dc5eb51dce55bf02992b5201d7fc2
Author: Ed van Bruggen <edvb54@gmail.com>
Date: Wed, 26 Jul 2017 20:41:35 -0700
Initial commit
Diffstat:
| .gitignore | | | 21 | +++++++++++++++++++++ |
| LICENSE | | | 19 | +++++++++++++++++++ |
| Makefile | | | 66 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| README.md | | | 96 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| arg.h | | | 63 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| config.def.h | | | 4 | ++++ |
| config.mk | | | 18 | ++++++++++++++++++ |
| frozen.c | | | 1001 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| frozen.h | | | 220 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| gs.1 | | | 118 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| gs.c | | | 203 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| util.c | | | 74 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| util.h | | | 14 | ++++++++++++++ |
13 files changed, 1917 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,21 @@
+# swap files
+*~
+*.swp
+*.swo
+\#*\#
+
+# compiled files
+gs
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.o
+*.obj
+*.so
+*.so.*
+
+# misc
+tags
+config.h
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,19 @@
+zlib License
+
+Copyright (c) 2017 Ed van Bruggen
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
diff --git a/Makefile b/Makefile
@@ -0,0 +1,66 @@
+# gs - gist creator
+# See LICENSE file for copyright and license details.
+
+include config.mk
+
+EXE = gs
+SRC = $(wildcard *.c)
+OBJ = $(SRC:.c=.o)
+
+all: options $(EXE)
+
+options:
+ @echo $(EXE) build options:
+ @echo "CFLAGS = $(CFLAGS)"
+ @echo "LDFLAGS = $(LDFLAGS)"
+
+.o:
+ @echo $(LD) $@
+ @$(LD) -o $@ $< $(LDFLAGS)
+
+.c.o:
+ @echo $(CC) $<
+ @$(CC) -c -o $@ $< $(CFLAGS)
+
+${OBJ}: config.h config.mk
+
+config.h:
+ @echo creating $@ from config.def.h
+ @cp config.def.h $@
+
+$(EXE): $(OBJ)
+ @echo $(CC) -o $@
+ @$(CC) -o $@ $(OBJ) $(LDFLAGS)
+
+clean:
+ @echo -n cleaning ...
+ @rm -f $(OBJ) $(EXE)
+ @echo \ done
+
+install: all
+ @echo -n installing $(EXE) to $(DESTDIR)$(PREFIX)/bin ...
+ @mkdir -p $(DESTDIR)$(PREFIX)/bin
+ @cp -f $(EXE) $(DESTDIR)$(PREFIX)/bin
+ @chmod 755 $(DESTDIR)$(PREFIX)/bin/$(EXE)
+ @echo \ done
+ @echo -n installing manual page to $(DESTDIR)$(MANPREFIX)/man1 ...
+ @mkdir -p $(DESTDIR)$(MANPREFIX)/man1
+ @sed "s/VERSION/$(VERSION)/g" < $(EXE).1 > $(DESTDIR)$(MANPREFIX)/man1/$(EXE).1
+ @chmod 644 $(DESTDIR)$(MANPREFIX)/man1/$(EXE).1
+ @echo \ done
+
+uninstall:
+ @echo -n removing $(EXE) from $(DESTDIR)$(PREFIX)/bin ...
+ @rm -f $(DESTDIR)$(PREFIX)/bin/$(EXE)
+ @echo \ done
+ @echo -n removing manual page from $(DESTDIR)$(MANPREFIX)/man1 ...
+ @rm -f $(DESTDIR)$(MANPREFIX)/man1/$(EXE).1
+ @echo \ done
+
+man:
+ @echo -n updating man page $(EXE).1 ...
+ @cat README.md | sed "s/# $(EXE)/# $(EXE) 1\n\n##NAME\n\n$(EXE) /" | \
+ md2man-roff | sed "s/\\[la\]/\</" | sed "s/\\[ra\]/\>/" > $(EXE).1
+ @echo \ done
+
+.PHONY: all options clean install uninstall man
diff --git a/README.md b/README.md
@@ -0,0 +1,96 @@
+# gs - gist creator
+
+## SYNOPSIS
+
+`gs` [**-pPhv**] [**-d** *DESCRIPTION*] [**-f** *FILENAME*] [**-u** *USER*[:*PASSWORD*] | **-U**] [*FILES* ...]
+
+## DESCRIPTION
+
+Easy way to create Github gists with the command line.
+
+## OPTIONS
+
+**-d** *DESCRIPTION*
+ Set gist description
+
+**-f** *FILENAME*
+ Set file name when reading from `stdin`
+
+**-p**
+ Make gist private
+
+**-P**
+ Make gist public (default)
+
+**-u** *USER*[:*PASSWORD*]
+ Change the Github account the gist will be posted under. A password can
+ given as well with a separating colon, a prompt is provided if not.
+
+**-U**
+ Post gist anonymously (default)
+
+**-h**
+ Print help and exit
+
+**-v**
+ Print version info and exit
+
+## USAGE
+
+Create a new gist of file `file.txt`:
+
+ $ gs file.txt
+ https://gist.github.com/<new-id>
+
+There is also support for multiple files in a single gist:
+
+ $ gs README.md Makefile prog.c
+ https://gist.github.com/<new-id>
+
+Specify the gist's description:
+
+ $ gs -d 'a cool shell script' script.sh
+ https://gist.github.com/<new-id>
+
+The gist's URL can be piped to other programs, for example to your clipboard to
+be pasted else where:
+
+ $ gs file.txt | xsel -bi
+
+You can also create a new gist from `stdin`. The file name needs to be supplied
+however:
+
+ $ cmd-which-errors | gs -f log.txt
+ https://gist.github.com/<new-id>
+
+New gists can be private as well:
+
+ $ gs -p personal.info
+ https://gist.github.com/<new-id>
+
+The new gist can be posted under a Github user, a prompt will ask for your
+password:
+
+ $ gs -u your-name good-proj.rs
+ Github password:
+ https://gist.github.com/<new-id>
+
+To skip the prompt your password can be supplied after a colon with the
+username:
+
+ $ gs -u your-name:password plugin/func.vim doc/func.txt
+ https://gist.github.com/<new-id>
+
+## AUTHOR
+
+Ed van Bruggen <edvb54@gmail.com>
+
+## SEE ALSO
+
+See project page at: <http://edryd.org/projects/gs.html>
+
+View source code at: <https://github.com/edvb/gs>
+
+## LICENSE
+
+zlib License
diff --git a/arg.h b/arg.h
@@ -0,0 +1,63 @@
+/*
+ * Copy me if you can.
+ * by 20h
+ */
+
+#ifndef ARG_H__
+#define ARG_H__
+
+extern char *argv0;
+
+/* use main(int argc, char *argv[]) */
+#define ARGBEGIN for (argv0 = basename(*argv), argv++, argc--;\
+ argv[0] && argv[0][0] == '-'\
+ && argv[0][1];\
+ argc--, argv++) {\
+ char argc_;\
+ char **argv_;\
+ int brk_;\
+ if (argv[0][1] == '-' && argv[0][2] == '\0') {\
+ argv++;\
+ argc--;\
+ break;\
+ }\
+ for (brk_ = 0, argv[0]++, argv_ = argv;\
+ argv[0][0] && !brk_;\
+ argv[0]++) {\
+ if (argv_ != argv)\
+ break;\
+ argc_ = argv[0][0];\
+ switch (argc_)
+
+/* Handles -NUM syntax */
+#define ARGNUM case '0':\
+ case '1':\
+ case '2':\
+ case '3':\
+ case '4':\
+ case '5':\
+ case '6':\
+ case '7':\
+ case '8':\
+ case '9'
+
+#define ARGEND }\
+ }
+
+#define ARGC() argc_
+
+#define ARGNUMF() (brk_ = 1, atoi(argv[0]))
+
+#define EARGF(x) ((argv[0][1] == '\0' && argv[1] == NULL)?\
+ ((x), abort(), (char *)0) :\
+ (brk_ = 1, (argv[0][1] != '\0')?\
+ (&argv[0][1]) :\
+ (argc--, argv++, argv[0])))
+
+#define ARGF() ((argv[0][1] == '\0' && argv[1] == NULL)?\
+ (char *)0 :\
+ (brk_ = 1, (argv[0][1] != '\0')?\
+ (&argv[0][1]) :\
+ (argc--, argv++, argv[0])))
+
+#endif
diff --git a/config.def.h b/config.def.h
@@ -0,0 +1,4 @@
+char *desc = ""; /* default gist description */
+char *fname = NULL; /* default gist filename when reading from stdin */
+char *user = NULL; /* default user, password can be given after colon */
+int pub = 1; /* 0: private need link to view, 1: public anyone can find */
diff --git a/config.mk b/config.mk
@@ -0,0 +1,18 @@
+# gs version number
+VERSION = 0.0.0
+
+# paths
+PREFIX = /usr/local
+MANPREFIX = ${PREFIX}/share/man
+
+# includes and libraries
+INCS = -Iinclude
+LIBS = -lcurl
+
+# flags
+CPPFLAGS = -DVERSION=\"$(VERSION)\" -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=600
+CFLAGS = -g -std=c99 -pedantic -Wall ${INCS} ${CPPFLAGS}
+LDFLAGS = -g ${LIBS}
+
+# compiler and linker
+CC = gcc
diff --git a/frozen.c b/frozen.c
@@ -0,0 +1,1001 @@
+/*
+ * Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com>
+ * Copyright (c) 2013 Cesanta Software Limited
+ * All rights reserved
+ *
+ * This library is dual-licensed: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation. For the terms of this
+ * license, see <http: *www.gnu.org/licenses/>.
+ *
+ * You are free to use this library under the terms of the GNU General
+ * Public License, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * Alternatively, you can license this library under a commercial
+ * license, as set out in <http://cesanta.com/products.html>.
+ */
+
+#define _CRT_SECURE_NO_WARNINGS /* Disable deprecation warning in VS2005+ */
+
+#include "frozen.h"
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if !defined(WEAK)
+#if (defined(__GNUC__) || defined(__TI_COMPILER_VERSION__)) && !defined(_WIN32)
+#define WEAK __attribute__((weak))
+#else
+#define WEAK
+#endif
+#endif
+
+#ifdef _WIN32
+#define snprintf cs_win_snprintf
+#define vsnprintf cs_win_vsnprintf
+int cs_win_snprintf(char *str, size_t size, const char *format, ...);
+int cs_win_vsnprintf(char *str, size_t size, const char *format, va_list ap);
+#if _MSC_VER >= 1700
+#include <stdint.h>
+#else
+typedef _int64 int64_t;
+typedef unsigned _int64 uint64_t;
+#endif
+#define PRId64 "I64d"
+#define PRIu64 "I64u"
+#if !defined(SIZE_T_FMT)
+#if _MSC_VER >= 1310
+#define SIZE_T_FMT "Iu"
+#else
+#define SIZE_T_FMT "u"
+#endif
+#endif
+#else /* _WIN32 */
+/* <inttypes.h> wants this for C++ */
+#ifndef __STDC_FORMAT_MACROS
+#define __STDC_FORMAT_MACROS
+#endif
+#include <inttypes.h>
+#if !defined(SIZE_T_FMT)
+#define SIZE_T_FMT "zu"
+#endif
+#endif /* _WIN32 */
+
+#define INT64_FMT PRId64
+#define UINT64_FMT PRIu64
+
+#ifndef va_copy
+#define va_copy(x, y) x = y
+#endif
+
+#ifndef JSON_MAX_PATH_LEN
+#define JSON_MAX_PATH_LEN 60
+#endif
+
+struct frozen {
+ const char *end;
+ const char *cur;
+
+ const char *cur_name;
+ size_t cur_name_len;
+
+ /* For callback API */
+ char path[JSON_MAX_PATH_LEN];
+ size_t path_len;
+ void *callback_data;
+ json_walk_callback_t callback;
+};
+
+struct fstate {
+ const char *ptr;
+ size_t path_len;
+};
+
+#define SET_STATE(fr, ptr, str, len) \
+ struct fstate fstate = {(ptr), (fr)->path_len}; \
+ append_to_path((fr), (str), (len));
+
+#define CALL_BACK(fr, tok, value, len) \
+ do { \
+ if ((fr)->callback && \
+ ((fr)->path_len == 0 || (fr)->path[(fr)->path_len - 1] != '.')) { \
+ struct json_token t = {(value), (len), (tok)}; \
+ \
+ /* Call the callback with the given value and current name */ \
+ (fr)->callback((fr)->callback_data, (fr)->cur_name, (fr)->cur_name_len, \
+ (fr)->path, &t); \
+ \
+ /* Reset the name */ \
+ (fr)->cur_name = NULL; \
+ (fr)->cur_name_len = 0; \
+ } \
+ } while (0)
+
+static int append_to_path(struct frozen *f, const char *str, int size) {
+ int n = f->path_len;
+ f->path_len +=
+ snprintf(f->path + f->path_len, sizeof(f->path) - (f->path_len), "%.*s", size, str);
+ if (f->path_len > sizeof(f->path) - 1) {
+ f->path_len = sizeof(f->path) - 1;
+ }
+
+ return n;
+}
+
+static void truncate_path(struct frozen *f, size_t len) {
+ f->path_len = len;
+ f->path[len] = '\0';
+}
+
+static int parse_object(struct frozen *f);
+static int parse_value(struct frozen *f);
+
+#define EXPECT(cond, err_code) \
+ do { \
+ if (!(cond)) return (err_code); \
+ } while (0)
+
+#define TRY(expr) \
+ do { \
+ int _n = expr; \
+ if (_n < 0) return _n; \
+ } while (0)
+
+#define END_OF_STRING (-1)
+
+static int left(const struct frozen *f) {
+ return f->end - f->cur;
+}
+
+static int is_space(int ch) {
+ return ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n';
+}
+
+static void skip_whitespaces(struct frozen *f) {
+ while (f->cur < f->end && is_space(*f->cur)) f->cur++;
+}
+
+static int cur(struct frozen *f) {
+ skip_whitespaces(f);
+ return f->cur >= f->end ? END_OF_STRING : *(unsigned char *) f->cur;
+}
+
+static int test_and_skip(struct frozen *f, int expected) {
+ int ch = cur(f);
+ if (ch == expected) {
+ f->cur++;
+ return 0;
+ }
+ return ch == END_OF_STRING ? JSON_STRING_INCOMPLETE : JSON_STRING_INVALID;
+}
+
+static int is_alpha(int ch) {
+ return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z');
+}
+
+static int is_digit(int ch) {
+ return ch >= '0' && ch <= '9';
+}
+
+static int is_hex_digit(int ch) {
+ return is_digit(ch) || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F');
+}
+
+static int get_escape_len(const char *s, int len) {
+ switch (*s) {
+ case 'u':
+ return len < 6 ? JSON_STRING_INCOMPLETE
+ : is_hex_digit(s[1]) && is_hex_digit(s[2]) &&
+ is_hex_digit(s[3]) && is_hex_digit(s[4])
+ ? 5
+ : JSON_STRING_INVALID;
+ case '"':
+ case '\\':
+ case '/':
+ case 'b':
+ case 'f':
+ case 'n':
+ case 'r':
+ case 't':
+ return len < 2 ? JSON_STRING_INCOMPLETE : 1;
+ default:
+ return JSON_STRING_INVALID;
+ }
+}
+
+/* identifier = letter { letter | digit | '_' } */
+static int parse_identifier(struct frozen *f) {
+ EXPECT(is_alpha(cur(f)), JSON_STRING_INVALID);
+ {
+ SET_STATE(f, f->cur, "", 0);
+ while (f->cur < f->end &&
+ (*f->cur == '_' || is_alpha(*f->cur) || is_digit(*f->cur))) {
+ f->cur++;
+ }
+ truncate_path(f, fstate.path_len);
+ CALL_BACK(f, JSON_TYPE_STRING, fstate.ptr, f->cur - fstate.ptr);
+ }
+ return 0;
+}
+
+static int get_utf8_char_len(unsigned char ch) {
+ if ((ch & 0x80) == 0) return 1;
+ switch (ch & 0xf0) {
+ case 0xf0:
+ return 4;
+ case 0xe0:
+ return 3;
+ default:
+ return 2;
+ }
+}
+
+/* string = '"' { quoted_printable_chars } '"' */
+static int parse_string(struct frozen *f) {
+ int n, ch = 0, len = 0;
+ TRY(test_and_skip(f, '"'));
+ {
+ SET_STATE(f, f->cur, "", 0);
+ for (; f->cur < f->end; f->cur += len) {
+ ch = *(unsigned char *) f->cur;
+ len = get_utf8_char_len((unsigned char) ch);
+ EXPECT(ch >= 32 && len > 0, JSON_STRING_INVALID); /* No control chars */
+ EXPECT(len < left(f), JSON_STRING_INCOMPLETE);
+ if (ch == '\\') {
+ EXPECT((n = get_escape_len(f->cur + 1, left(f))) > 0, n);
+ len += n;
+ } else if (ch == '"') {
+ truncate_path(f, fstate.path_len);
+ CALL_BACK(f, JSON_TYPE_STRING, fstate.ptr, f->cur - fstate.ptr);
+ f->cur++;
+ break;
+ };
+ }
+ }
+ return ch == '"' ? 0 : JSON_STRING_INCOMPLETE;
+}
+
+/* number = [ '-' ] digit+ [ '.' digit+ ] [ ['e'|'E'] ['+'|'-'] digit+ ] */
+static int parse_number(struct frozen *f) {
+ int ch = cur(f);
+ SET_STATE(f, f->cur, "", 0);
+ if (ch == '-') f->cur++;
+ EXPECT(f->cur < f->end, JSON_STRING_INCOMPLETE);
+ EXPECT(is_digit(f->cur[0]), JSON_STRING_INVALID);
+ while (f->cur < f->end && is_digit(f->cur[0])) f->cur++;
+ if (f->cur < f->end && f->cur[0] == '.') {
+ f->cur++;
+ EXPECT(f->cur < f->end, JSON_STRING_INCOMPLETE);
+ EXPECT(is_digit(f->cur[0]), JSON_STRING_INVALID);
+ while (f->cur < f->end && is_digit(f->cur[0])) f->cur++;
+ }
+ if (f->cur < f->end && (f->cur[0] == 'e' || f->cur[0] == 'E')) {
+ f->cur++;
+ EXPECT(f->cur < f->end, JSON_STRING_INCOMPLETE);
+ if ((f->cur[0] == '+' || f->cur[0] == '-')) f->cur++;
+ EXPECT(f->cur < f->end, JSON_STRING_INCOMPLETE);
+ EXPECT(is_digit(f->cur[0]), JSON_STRING_INVALID);
+ while (f->cur < f->end && is_digit(f->cur[0])) f->cur++;
+ }
+ truncate_path(f, fstate.path_len);
+ CALL_BACK(f, JSON_TYPE_NUMBER, fstate.ptr, f->cur - fstate.ptr);
+ return 0;
+}
+
+/* array = '[' [ value { ',' value } ] ']' */
+static int parse_array(struct frozen *f) {
+ int i = 0, current_path_len;
+ char buf[20];
+ TRY(test_and_skip(f, '['));
+ {
+ CALL_BACK(f, JSON_TYPE_ARRAY_START, NULL, 0);
+ {
+ SET_STATE(f, f->cur - 1, "", 0);
+ while (cur(f) != ']') {
+ snprintf(buf, sizeof(buf), "[%d]", i);
+ i++;
+ current_path_len = append_to_path(f, buf, strlen(buf));
+ f->cur_name =
+ f->path + strlen(f->path) - strlen(buf) + 1 /*opening brace*/;
+ f->cur_name_len = strlen(buf) - 2 /*braces*/;
+ TRY(parse_value(f));
+ truncate_path(f, current_path_len);
+ if (cur(f) == ',') f->cur++;
+ }
+ TRY(test_and_skip(f, ']'));
+ truncate_path(f, fstate.path_len);
+ CALL_BACK(f, JSON_TYPE_ARRAY_END, fstate.ptr, f->cur - fstate.ptr);
+ }
+ }
+ return 0;
+}
+
+static int expect(struct frozen *f, const char *s, int len,
+ enum json_token_type tok_type) {
+ int i, n = left(f);
+ SET_STATE(f, f->cur, "", 0);
+ for (i = 0; i < len; i++) {
+ if (i >= n) return JSON_STRING_INCOMPLETE;
+ if (f->cur[i] != s[i]) return JSON_STRING_INVALID;
+ }
+ f->cur += len;
+ truncate_path(f, fstate.path_len);
+
+ CALL_BACK(f, tok_type, fstate.ptr, f->cur - fstate.ptr);
+
+ return 0;
+}
+
+/* value = 'null' | 'true' | 'false' | number | string | array | object */
+static int parse_value(struct frozen *f) {
+ int ch = cur(f);
+
+ switch (ch) {
+ case '"':
+ TRY(parse_string(f));
+ break;
+ case '{':
+ TRY(parse_object(f));
+ break;
+ case '[':
+ TRY(parse_array(f));
+ break;
+ case 'n':
+ TRY(expect(f, "null", 4, JSON_TYPE_NULL));
+ break;
+ case 't':
+ TRY(expect(f, "true", 4, JSON_TYPE_TRUE));
+ break;
+ case 'f':
+ TRY(expect(f, "false", 5, JSON_TYPE_FALSE));
+ break;
+ case '-':
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ TRY(parse_number(f));
+ break;
+ default:
+ return ch == END_OF_STRING ? JSON_STRING_INCOMPLETE : JSON_STRING_INVALID;
+ }
+
+ return 0;
+}
+
+/* key = identifier | string */
+static int parse_key(struct frozen *f) {
+ int ch = cur(f);
+#if 0
+ printf("%s [%.*s]\n", __func__, (int) (f->end - f->cur), f->cur);
+#endif
+ if (is_alpha(ch)) {
+ TRY(parse_identifier(f));
+ } else if (ch == '"') {
+ TRY(parse_string(f));
+ } else {
+ return ch == END_OF_STRING ? JSON_STRING_INCOMPLETE : JSON_STRING_INVALID;
+ }
+ return 0;
+}
+
+/* pair = key ':' value */
+static int parse_pair(struct frozen *f) {
+ int current_path_len;
+ const char *tok;
+ skip_whitespaces(f);
+ tok = f->cur;
+ TRY(parse_key(f));
+ {
+ f->cur_name = *tok == '"' ? tok + 1 : tok;
+ f->cur_name_len = *tok == '"' ? f->cur - tok - 2 : f->cur - tok;
+ current_path_len = append_to_path(f, f->cur_name, f->cur_name_len);
+ }
+ TRY(test_and_skip(f, ':'));
+ TRY(parse_value(f));
+ truncate_path(f, current_path_len);
+ return 0;
+}
+
+/* object = '{' pair { ',' pair } '}' */
+static int parse_object(struct frozen *f) {
+ TRY(test_and_skip(f, '{'));
+ {
+ CALL_BACK(f, JSON_TYPE_OBJECT_START, NULL, 0);
+ {
+ SET_STATE(f, f->cur - 1, ".", 1);
+ while (cur(f) != '}') {
+ TRY(parse_pair(f));
+ if (cur(f) == ',') f->cur++;
+ }
+ TRY(test_and_skip(f, '}'));
+ truncate_path(f, fstate.path_len);
+ CALL_BACK(f, JSON_TYPE_OBJECT_END, fstate.ptr, f->cur - fstate.ptr);
+ }
+ }
+ return 0;
+}
+
+static int doit(struct frozen *f) {
+ if (f->cur == 0 || f->end < f->cur) return JSON_STRING_INVALID;
+ if (f->end == f->cur) return JSON_STRING_INCOMPLETE;
+ return parse_value(f);
+}
+
+int json_escape(struct json_out *out, const char *p, size_t len) WEAK;
+int json_escape(struct json_out *out, const char *p, size_t len) {
+ size_t i, cl, n = 0;
+ const char *hex_digits = "0123456789abcdef";
+ const char *specials = "btnvfr";
+
+ for (i = 0; i < len; i++) {
+ unsigned char ch = ((unsigned char *) p)[i];
+ if (ch == '"' || ch == '\\') {
+ n += out->printer(out, "\\", 1);
+ n += out->printer(out, p + i, 1);
+ } else if (ch >= '\b' && ch <= '\r') {
+ n += out->printer(out, "\\", 1);
+ n += out->printer(out, &specials[ch - '\b'], 1);
+ } else if (isprint(ch)) {
+ n += out->printer(out, p + i, 1);
+ } else if ((cl = get_utf8_char_len(ch)) == 1) {
+ n += out->printer(out, "\\u00", 4);
+ n += out->printer(out, &hex_digits[(ch >> 4) % 0xf], 1);
+ n += out->printer(out, &hex_digits[ch % 0xf], 1);
+ } else {
+ n += out->printer(out, p + i, cl);
+ i += cl - 1;
+ }
+ }
+
+ return n;
+}
+
+int json_printer_buf(struct json_out *out, const char *buf, size_t len) WEAK;
+int json_printer_buf(struct json_out *out, const char *buf, size_t len) {
+ size_t avail = out->u.buf.size - out->u.buf.len;
+ size_t n = len < avail ? len : avail;
+ memcpy(out->u.buf.buf + out->u.buf.len, buf, n);
+ out->u.buf.len += n;
+ if (out->u.buf.size > 0) {
+ size_t idx = out->u.buf.len;
+ if (idx >= out->u.buf.size) idx = out->u.buf.size - 1;
+ out->u.buf.buf[idx] = '\0';
+ }
+ return len;
+}
+
+int json_printer_file(struct json_out *out, const char *buf, size_t len) WEAK;
+int json_printer_file(struct json_out *out, const char *buf, size_t len) {
+ return fwrite(buf, 1, len, out->u.fp);
+}
+
+static int b64idx(int c) {
+ if (c < 26) {
+ return c + 'A';
+ } else if (c < 52) {
+ return c - 26 + 'a';
+ } else if (c < 62) {
+ return c - 52 + '0';
+ } else {
+ return c == 62 ? '+' : '/';
+ }
+}
+
+static int b64rev(int c) {
+ if (c >= 'A' && c <= 'Z') {
+ return c - 'A';
+ } else if (c >= 'a' && c <= 'z') {
+ return c + 26 - 'a';
+ } else if (c >= '0' && c <= '9') {
+ return c + 52 - '0';
+ } else if (c == '+') {
+ return 62;
+ } else if (c == '/') {
+ return 63;
+ } else {
+ return 64;
+ }
+}
+
+static uint8_t hexdec(const char *s) {
+#define HEXTOI(x) (x >= '0' && x <= '9' ? x - '0' : x - 'W')
+ int a = tolower(*(const unsigned char *) s);
+ int b = tolower(*(const unsigned char *) (s + 1));
+ return (HEXTOI(a) << 4) | HEXTOI(b);
+}
+
+static int b64enc(struct json_out *out, const unsigned char *p, int n) {
+ char buf[4];
+ int i, len = 0;
+ for (i = 0; i < n; i += 3) {
+ int a = p[i], b = i + 1 < n ? p[i + 1] : 0, c = i + 2 < n ? p[i + 2] : 0;
+ buf[0] = b64idx(a >> 2);
+ buf[1] = b64idx((a & 3) << 4 | (b >> 4));
+ buf[2] = b64idx((b & 15) << 2 | (c >> 6));
+ buf[3] = b64idx(c & 63);
+ if (i + 1 >= n) buf[2] = '=';
+ if (i + 2 >= n) buf[3] = '=';
+ len += out->printer(out, buf, sizeof(buf));
+ }
+ return len;
+}
+
+static int b64dec(const char *src, int n, char *dst) {
+ const char *end = src + n;
+ int len = 0;
+ while (src + 3 < end) {
+ int a = b64rev(src[0]), b = b64rev(src[1]), c = b64rev(src[2]),
+ d = b64rev(src[3]);
+ dst[len++] = (a << 2) | (b >> 4);
+ if (src[2] != '=') {
+ dst[len++] = (b << 4) | (c >> 2);
+ if (src[3] != '=') {
+ dst[len++] = (c << 6) | d;
+ }
+ }
+ src += 4;
+ }
+ return len;
+}
+
+int json_vprintf(struct json_out *out, const char *fmt, va_list xap) WEAK;
+int json_vprintf(struct json_out *out, const char *fmt, va_list xap) {
+ int len = 0;
+ const char *quote = "\"", *null = "null";
+ va_list ap;
+ va_copy(ap, xap);
+
+ while (*fmt != '\0') {
+ if (strchr(":, \r\n\t[]{}\"", *fmt) != NULL) {
+ len += out->printer(out, fmt, 1);
+ fmt++;
+ } else if (fmt[0] == '%') {
+ char buf[21];
+ size_t skip = 2;
+
+ if (fmt[1] == 'l' && fmt[2] == 'l' && (fmt[3] == 'd' || fmt[3] == 'u')) {
+ int64_t val = va_arg(ap, int64_t);
+ const char *fmt2 = fmt[3] == 'u' ? "%" UINT64_FMT : "%" INT64_FMT;
+ snprintf(buf, sizeof(buf), fmt2, val);
+ len += out->printer(out, buf, strlen(buf));
+ skip += 2;
+ } else if (fmt[1] == 'z' && fmt[2] == 'u') {
+ size_t val = va_arg(ap, size_t);
+ snprintf(buf, sizeof(buf), "%" SIZE_T_FMT, val);
+ len += out->printer(out, buf, strlen(buf));
+ skip += 1;
+ } else if (fmt[1] == 'M') {
+ json_printf_callback_t f = va_arg(ap, json_printf_callback_t);
+ len += f(out, &ap);
+ } else if (fmt[1] == 'B') {
+ int val = va_arg(ap, int);
+ const char *str = val ? "true" : "false";
+ len += out->printer(out, str, strlen(str));
+ } else if (fmt[1] == 'H') {
+ const char *hex = "0123456789abcdef";
+ int i, n = va_arg(ap, int);
+ const unsigned char *p = va_arg(ap, const unsigned char *);
+ len += out->printer(out, quote, 1);
+ for (i = 0; i < n; i++) {
+ len += out->printer(out, &hex[(p[i] >> 4) & 0xf], 1);
+ len += out->printer(out, &hex[p[i] & 0xf], 1);
+ }
+ len += out->printer(out, quote, 1);
+ } else if (fmt[1] == 'V') {
+ const unsigned char *p = va_arg(ap, const unsigned char *);
+ int n = va_arg(ap, int);
+ len += out->printer(out, quote, 1);
+ len += b64enc(out, p, n);
+ len += out->printer(out, quote, 1);
+ } else if (fmt[1] == 'Q' ||
+ (fmt[1] == '.' && fmt[2] == '*' && fmt[3] == 'Q')) {
+ size_t l = 0;
+ const char *p;
+
+ if (fmt[1] == '.') {
+ l = (size_t) va_arg(ap, int);
+ skip += 2;
+ }
+ p = va_arg(ap, char *);
+
+ if (p == NULL) {
+ len += out->printer(out, null, 4);
+ } else {
+ if (fmt[1] == 'Q') {
+ l = strlen(p);
+ }
+ len += out->printer(out, quote, 1);
+ len += json_escape(out, p, l);
+ len += out->printer(out, quote, 1);
+ }
+ } else {
+ /*
+ * we delegate printing to the system printf.
+ * The goal here is to delegate all modifiers parsing to the system
+ * printf, as you can see below we still have to parse the format
+ * types.
+ *
+ * Currently, %s with strings longer than 20 chars will require
+ * double-buffering (an auxiliary buffer will be allocated from heap).
+ * TODO(dfrank): reimplement %s and %.*s in order to avoid that.
+ */
+
+ const char *end_of_format_specifier = "sdfFgGlhuI.*-0123456789";
+ size_t n = strspn(fmt + 1, end_of_format_specifier);
+ char *pbuf = buf;
+ size_t need_len;
+ char fmt2[20];
+ va_list sub_ap;
+ strncpy(fmt2, fmt, n + 1 > sizeof(fmt2) ? sizeof(fmt2) : n + 1);
+ fmt2[n + 1] = '\0';
+
+ va_copy(sub_ap, ap);
+ need_len =
+ vsnprintf(buf, sizeof(buf), fmt2, sub_ap) + 1 /* null-term */;
+ /*
+ * TODO(lsm): Fix windows & eCos code path here. Their vsnprintf
+ * implementation returns -1 on overflow rather needed size.
+ */
+ if (need_len > sizeof(buf)) {
+ /*
+ * resulting string doesn't fit into a stack-allocated buffer `buf`,
+ * so we need to allocate a new buffer from heap and use it
+ */
+ pbuf = (char *) malloc(need_len);
+ va_copy(sub_ap, ap);
+ vsnprintf(pbuf, need_len, fmt2, sub_ap);
+ }
+
+ /*
+ * however we need to parse the type ourselves in order to advance
+ * the va_list by the correct amount; there is no portable way to
+ * inherit the advancement made by vprintf.
+ * 32-bit (linux or windows) passes va_list by value.
+ */
+ if ((n + 1 == strlen("%" PRId64) && strcmp(fmt2, "%" PRId64) == 0) ||
+ (n + 1 == strlen("%" PRIu64) && strcmp(fmt2, "%" PRIu64) == 0)) {
+ (void) va_arg(ap, int64_t);
+ skip += strlen(PRIu64) - 1;
+ } else if (strcmp(fmt2, "%.*s") == 0) {
+ (void) va_arg(ap, int);
+ (void) va_arg(ap, char *);
+ } else {
+ switch (fmt2[n]) {
+ case 'u':
+ case 'd':
+ (void) va_arg(ap, int);
+ break;
+ case 'g':
+ case 'f':
+ (void) va_arg(ap, double);
+ break;
+ case 'p':
+ (void) va_arg(ap, void *);
+ break;
+ default:
+ /* many types are promoted to int */
+ (void) va_arg(ap, int);
+ }
+ }
+
+ len += out->printer(out, pbuf, strlen(pbuf));
+ skip = n + 1;
+
+ /* If buffer was allocated from heap, free it */
+ if (pbuf != buf) {
+ free(pbuf);
+ pbuf = NULL;
+ }
+ }
+ fmt += skip;
+ } else if (*fmt == '_' || is_alpha(*fmt)) {
+ len += out->printer(out, quote, 1);
+ while (*fmt == '_' || is_alpha(*fmt) || is_digit(*fmt)) {
+ len += out->printer(out, fmt, 1);
+ fmt++;
+ }
+ len += out->printer(out, quote, 1);
+ } else {
+ fmt++;
+ }
+ }
+ va_end(ap);
+
+ return len;
+}
+
+int json_printf(struct json_out *out, const char *fmt, ...) WEAK;
+int json_printf(struct json_out *out, const char *fmt, ...) {
+ int n;
+ va_list ap;
+ va_start(ap, fmt);
+ n = json_vprintf(out, fmt, ap);
+ va_end(ap);
+ return n;
+}
+
+int json_printf_array(struct json_out *out, va_list *ap) WEAK;
+int json_printf_array(struct json_out *out, va_list *ap) {
+ int len = 0;
+ char *arr = va_arg(*ap, char *);
+ size_t i, arr_size = va_arg(*ap, size_t);
+ size_t elem_size = va_arg(*ap, size_t);
+ const char *fmt = va_arg(*ap, char *);
+ len += json_printf(out, "[", 1);
+ for (i = 0; arr != NULL && i < arr_size / elem_size; i++) {
+ union {
+ int64_t i;
+ double d;
+ } val;
+ memcpy(&val, arr + i * elem_size,
+ elem_size > sizeof(val) ? sizeof(val) : elem_size);
+ if (i > 0) len += json_printf(out, ", ");
+ if (strchr(fmt, 'f') != NULL) {
+ len += json_printf(out, fmt, val.d);
+ } else {
+ len += json_printf(out, fmt, val.i);
+ }
+ }
+ len += json_printf(out, "]", 1);
+ return len;
+}
+
+#ifdef _WIN32
+int cs_win_vsnprintf(char *str, size_t size, const char *format, va_list ap) WEAK;
+int cs_win_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
+ int res = _vsnprintf(str, size, format, ap);
+ va_end(ap);
+ if (res >= size) {
+ str[size - 1] = '\0';
+ }
+ return res;
+}
+
+int cs_win_snprintf(char *str, size_t size, const char *format, ...) WEAK;
+int cs_win_snprintf(char *str, size_t size, const char *format, ...) {
+ int res;
+ va_list ap;
+ va_start(ap, format);
+ res = vsnprintf(str, size, format, ap);
+ va_end(ap);
+ return res;
+}
+#endif /* _WIN32 */
+
+int json_walk(const char *json_string, int json_string_length,
+ json_walk_callback_t callback, void *callback_data) WEAK;
+int json_walk(const char *json_string, int json_string_length,
+ json_walk_callback_t callback, void *callback_data) {
+ struct frozen frozen;
+
+ memset(&frozen, 0, sizeof(frozen));
+ frozen.end = json_string + json_string_length;
+ frozen.cur = json_string;
+ frozen.callback_data = callback_data;
+ frozen.callback = callback;
+
+ TRY(doit(&frozen));
+
+ return frozen.cur - json_string;
+}
+
+struct scan_array_info {
+ char path[JSON_MAX_PATH_LEN];
+ struct json_token *token;
+};
+
+static void json_scanf_array_elem_cb(void *callback_data, const char *name,
+ size_t name_len, const char *path,
+ const struct json_token *token) {
+ struct scan_array_info *info = (struct scan_array_info *) callback_data;
+
+ (void) name;
+ (void) name_len;
+
+ if (strcmp(path, info->path) == 0) {
+ *info->token = *token;
+ }
+}
+
+int json_scanf_array_elem(const char *s, int len, const char *path, int idx,
+ struct json_token *token) WEAK;
+int json_scanf_array_elem(const char *s, int len, const char *path, int idx,
+ struct json_token *token) {
+ struct scan_array_info info;
+ info.token = token;
+ memset(token, 0, sizeof(*token));
+ snprintf(info.path, sizeof(info.path), "%s[%d]", path, idx);
+ json_walk(s, len, json_scanf_array_elem_cb, &info);
+ return token->len;
+}
+
+struct json_scanf_info {
+ int num_conversions;
+ char *path;
+ const char *fmt;
+ void *target;
+ void *user_data;
+ int type;
+};
+
+int json_unescape(const char *src, int slen, char *dst, int dlen) WEAK;
+int json_unescape(const char *src, int slen, char *dst, int dlen) {
+ char *send = (char *) src + slen, *dend = dst + dlen, *orig_dst = dst, *p;
+ const char *esc1 = "\"\\/bfnrt", *esc2 = "\"\\/\b\f\n\r\t";
+
+ while (src < send) {
+ if (*src == '\\') {
+ if (++src >= send) return JSON_STRING_INCOMPLETE;
+ if (*src == 'u') {
+ /* TODO(lsm): \uXXXX escapes drag utf8 lib... Do it at some stage */
+ return JSON_STRING_INVALID;
+ } else if ((p = (char *) strchr(esc1, *src)) != NULL) {
+ if (dst < dend) *dst = esc2[p - esc1];
+ } else {
+ return JSON_STRING_INVALID;
+ }
+ } else {
+ if (dst < dend) *dst = *src;
+ }
+ dst++;
+ src++;
+ }
+
+ return dst - orig_dst;
+}
+
+static void json_scanf_cb(void *callback_data, const char *name,
+ size_t name_len, const char *path,
+ const struct json_token *token) {
+ struct json_scanf_info *info = (struct json_scanf_info *) callback_data;
+
+ (void) name;
+ (void) name_len;
+
+ if (strcmp(path, info->path) != 0) {
+ /* It's not the path we're looking for, so, just ignore this callback */
+ return;
+ }
+
+ if (token->ptr == NULL) {
+ /*
+ * We're not interested here in the events for which we have no value;
+ * namely, JSON_TYPE_OBJECT_START and JSON_TYPE_ARRAY_START
+ */
+ return;
+ }
+
+ switch (info->type) {
+ case 'B':
+ info->num_conversions++;
+ *(int *) info->target = (token->type == JSON_TYPE_TRUE ? 1 : 0);
+ break;
+ case 'M': {
+ union {
+ void *p;
+ json_scanner_t f;
+ } u = {info->target};
+ info->num_conversions++;
+ u.f(token->ptr, token->len, info->user_data);
+ break;
+ }
+ case 'Q': {
+ char **dst = (char **) info->target;
+ if (token->type == JSON_TYPE_NULL) {
+ *dst = NULL;
+ } else {
+ int unescaped_len = json_unescape(token->ptr, token->len, NULL, 0);
+ if (unescaped_len >= 0 &&
+ (*dst = (char *) malloc(unescaped_len + 1)) != NULL) {
+ info->num_conversions++;
+ json_unescape(token->ptr, token->len, *dst, unescaped_len);
+ (*dst)[unescaped_len] = '\0';
+ }
+ }
+ break;
+ }
+ case 'H': {
+ char **dst = (char **) info->user_data;
+ int i, len = token->len / 2;
+ *(int *) info->target = len;
+ if ((*dst = (char *) malloc(len + 1)) != NULL) {
+ for (i = 0; i < len; i++) {
+ (*dst)[i] = hexdec(token->ptr + 2 * i);
+ }
+ (*dst)[len] = '\0';
+ info->num_conversions++;
+ }
+ break;
+ }
+ case 'V': {
+ char **dst = (char **) info->target;
+ int len = token->len * 4 / 3 + 2;
+ if ((*dst = (char *) malloc(len + 1)) != NULL) {
+ int n = b64dec(token->ptr, token->len, *dst);
+ (*dst)[n] = '\0';
+ *(int *) info->user_data = n;
+ info->num_conversions++;
+ }
+ break;
+ }
+ case 'T':
+ info->num_conversions++;
+ *(struct json_token *) info->target = *token;
+ break;
+ default:
+ info->num_conversions += sscanf(token->ptr, info->fmt, info->target);
+ break;
+ }
+}
+
+int json_vscanf(const char *s, int len, const char *fmt, va_list ap) WEAK;
+int json_vscanf(const char *s, int len, const char *fmt, va_list ap) {
+ char path[JSON_MAX_PATH_LEN] = "", fmtbuf[20];
+ int i = 0;
+ char *p = NULL;
+ struct json_scanf_info info = {0, path, fmtbuf, NULL, NULL, 0};
+
+ while (fmt[i] != '\0') {
+ if (fmt[i] == '{') {
+ strcat(path, ".");
+ i++;
+ } else if (fmt[i] == '}') {
+ if ((p = strrchr(path, '.')) != NULL) *p = '\0';
+ i++;
+ } else if (fmt[i] == '%') {
+ info.target = va_arg(ap, void *);
+ info.type = fmt[i + 1];
+ switch (fmt[i + 1]) {
+ case 'M':
+ case 'V':
+ case 'H':
+ info.user_data = va_arg(ap, void *);
+ /* FALLTHROUGH */
+ case 'B':
+ case 'Q':
+ case 'T':
+ i += 2;
+ break;
+ default: {
+ const char *delims = ", \t\r\n]}";
+ int conv_len = strcspn(fmt + i + 1, delims) + 1;
+ snprintf(fmtbuf, sizeof(fmtbuf), "%.*s", conv_len, fmt + i);
+ i += conv_len;
+ i += strspn(fmt + i, delims);
+ break;
+ }
+ }
+ json_walk(s, len, json_scanf_cb, &info);
+ } else if (is_alpha(fmt[i]) || get_utf8_char_len(fmt[i]) > 1) {
+ const char *delims = ": \r\n\t";
+ int key_len = strcspn(&fmt[i], delims);
+ if ((p = strrchr(path, '.')) != NULL) p[1] = '\0';
+ sprintf(path + strlen(path), "%.*s", key_len, &fmt[i]);
+ i += key_len + strspn(fmt + i + key_len, delims);
+ } else {
+ i++;
+ }
+ }
+ return info.num_conversions;
+}
+
+int json_scanf(const char *str, int len, const char *fmt, ...) WEAK;
+int json_scanf(const char *str, int len, const char *fmt, ...) {
+ int result;
+ va_list ap;
+ va_start(ap, fmt);
+ result = json_vscanf(str, len, fmt, ap);
+ va_end(ap);
+ return result;
+}
diff --git a/frozen.h b/frozen.h
@@ -0,0 +1,220 @@
+/*
+ * Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com>
+ * Copyright (c) 2013 Cesanta Software Limited
+ * All rights reserved
+ *
+ * This library is dual-licensed: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation. For the terms of this
+ * license, see <http: *www.gnu.org/licenses/>.
+ *
+ * You are free to use this library under the terms of the GNU General
+ * Public License, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * Alternatively, you can license this library under a commercial
+ * license, as set out in <http://cesanta.com/products.html>.
+ */
+
+#ifndef CS_FROZEN_FROZEN_H_
+#define CS_FROZEN_FROZEN_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+
+/* JSON token type */
+enum json_token_type {
+ JSON_TYPE_INVALID = 0, /* memsetting to 0 should create INVALID value */
+ JSON_TYPE_STRING,
+ JSON_TYPE_NUMBER,
+ JSON_TYPE_TRUE,
+ JSON_TYPE_FALSE,
+ JSON_TYPE_NULL,
+ JSON_TYPE_OBJECT_START,
+ JSON_TYPE_OBJECT_END,
+ JSON_TYPE_ARRAY_START,
+ JSON_TYPE_ARRAY_END,
+
+ JSON_TYPES_CNT
+};
+
+/*
+ * Structure containing token type and value. Used in `json_walk()` and
+ * `json_scanf()` with the format specifier `%T`.
+ */
+struct json_token {
+ const char *ptr; /* Points to the beginning of the value */
+ int len; /* Value length */
+ enum json_token_type type; /* Type of the token, possible values are above */
+};
+
+#define JSON_INVALID_TOKEN \
+ { 0, 0, JSON_TYPE_INVALID }
+
+/* Error codes */
+#define JSON_STRING_INVALID -1
+#define JSON_STRING_INCOMPLETE -2
+
+/*
+ * Callback-based SAX-like API.
+ *
+ * Property name and length is given only if it's available: i.e. if current
+ * event is an object's property. In other cases, `name` is `NULL`. For
+ * example, name is never given:
+ * - For the first value in the JSON string;
+ * - For events JSON_TYPE_OBJECT_END and JSON_TYPE_ARRAY_END
+ *
+ * E.g. for the input `{ "foo": 123, "bar": [ 1, 2, { "baz": true } ] }`,
+ * the sequence of callback invocations will be as follows:
+ *
+ * - type: JSON_TYPE_OBJECT_START, name: NULL, path: "", value: NULL
+ * - type: JSON_TYPE_NUMBER, name: "foo", path: ".foo", value: "123"
+ * - type: JSON_TYPE_ARRAY_START, name: "bar", path: ".bar", value: NULL
+ * - type: JSON_TYPE_NUMBER, name: "0", path: ".bar[0]", value: "1"
+ * - type: JSON_TYPE_NUMBER, name: "1", path: ".bar[1]", value: "2"
+ * - type: JSON_TYPE_OBJECT_START, name: "2", path: ".bar[2]", value: NULL
+ * - type: JSON_TYPE_TRUE, name: "baz", path: ".bar[2].baz", value: "true"
+ * - type: JSON_TYPE_OBJECT_END, name: NULL, path: ".bar[2]", value: "{ \"baz\":
+ *true }"
+ * - type: JSON_TYPE_ARRAY_END, name: NULL, path: ".bar", value: "[ 1, 2, {
+ *\"baz\": true } ]"
+ * - type: JSON_TYPE_OBJECT_END, name: NULL, path: "", value: "{ \"foo\": 123,
+ *\"bar\": [ 1, 2, { \"baz\": true } ] }"
+ */
+typedef void (*json_walk_callback_t)(void *callback_data, const char *name,
+ size_t name_len, const char *path,
+ const struct json_token *token);
+
+/*
+ * Parse `json_string`, invoking `callback` in a way similar to SAX parsers;
+ * see `json_walk_callback_t`.
+ */
+int json_walk(const char *json_string, int json_string_length,
+ json_walk_callback_t callback, void *callback_data);
+
+/*
+ * JSON generation API.
+ * struct json_out abstracts output, allowing alternative printing plugins.
+ */
+struct json_out {
+ int (*printer)(struct json_out *, const char *str, size_t len);
+ union {
+ struct {
+ char *buf;
+ size_t size;
+ size_t len;
+ } buf;
+ void *data;
+ FILE *fp;
+ } u;
+};
+
+extern int json_printer_buf(struct json_out *, const char *, size_t);
+extern int json_printer_file(struct json_out *, const char *, size_t);
+
+#define JSON_OUT_BUF(buf, len) \
+ { \
+ json_printer_buf, { \
+ { buf, len, 0 } \
+ } \
+ }
+#define JSON_OUT_FILE(fp) \
+ { \
+ json_printer_file, { \
+ { (void *) fp, 0, 0 } \
+ } \
+ }
+
+typedef int (*json_printf_callback_t)(struct json_out *, va_list *ap);
+
+/*
+ * Generate formatted output into a given sting buffer.
+ * This is a superset of printf() function, with extra format specifiers:
+ * - `%B` print json boolean, `true` or `false`. Accepts an `int`.
+ * - `%Q` print quoted escaped string or `null`. Accepts a `const char *`.
+ * - `%.*Q` same as `%Q`, but with length. Accepts `int`, `const char *`
+ * - `%V` print quoted base64-encoded string. Accepts a `const char *`, `int`.
+ * - `%H` print quoted hex-encoded string. Accepts a `int`, `const char *`.
+ * - `%M` invokes a json_printf_callback_t function. That callback function
+ * can consume more parameters.
+ *
+ * Return number of bytes printed. If the return value is bigger then the
+ * supplied buffer, that is an indicator of overflow. In the overflow case,
+ * overflown bytes are not printed.
+ */
+int json_printf(struct json_out *, const char *fmt, ...);
+int json_vprintf(struct json_out *, const char *fmt, va_list ap);
+
+/*
+ * Helper %M callback that prints contiguous C arrays.
+ * Consumes void *array_ptr, size_t array_size, size_t elem_size, char *fmt
+ * Return number of bytes printed.
+ */
+int json_printf_array(struct json_out *, va_list *ap);
+
+/*
+ * Scan JSON string `str`, performing scanf-like conversions according to `fmt`.
+ * This is a `scanf()` - like function, with following differences:
+ *
+ * 1. Object keys in the format string may be not quoted, e.g. "{key: %d}"
+ * 2. Order of keys in an object is irrelevant.
+ * 3. Several extra format specifiers are supported:
+ * - %B: consumes `int *`, expects boolean `true` or `false`.
+ * - %Q: consumes `char **`, expects quoted, JSON-encoded string. Scanned
+ * string is malloc-ed, caller must free() the string.
+ * - %V: consumes `char **`, `int *`. Expects base64-encoded string.
+ * Result string is base64-decoded, malloced and NUL-terminated.
+ * The length of result string is stored in `int *` placeholder.
+ * Caller must free() the result.
+ * - %H: consumes `int *`, `char **`.
+ * Expects a hex-encoded string, e.g. "fa014f".
+ * Result string is hex-decoded, malloced and NUL-terminated.
+ * The length of the result string is stored in `int *` placeholder.
+ * Caller must free() the result.
+ * - %M: consumes custom scanning function pointer and
+ * `void *user_data` parameter - see json_scanner_t definition.
+ * - %T: consumes `struct json_token *`, fills it out with matched token.
+ *
+ * Return number of elements successfully scanned & converted.
+ * Negative number means scan error.
+ */
+int json_scanf(const char *str, int str_len, const char *fmt, ...);
+int json_vscanf(const char *str, int str_len, const char *fmt, va_list ap);
+
+/* json_scanf's %M handler */
+typedef void (*json_scanner_t)(const char *str, int len, void *user_data);
+
+/*
+ * Helper function to scan array item with given path and index.
+ * Fills `token` with the matched JSON token.
+ * Return 0 if no array element found, otherwise non-0.
+ */
+int json_scanf_array_elem(const char *s, int len, const char *path, int index,
+ struct json_token *token);
+
+/*
+ * Unescape JSON-encoded string src,slen into dst, dlen.
+ * src and dst may overlap.
+ * If destination buffer is too small (or zero-length), result string is not
+ * written but the length is counted nevertheless (similar to snprintf).
+ * Return the length of unescaped string in bytes.
+ */
+int json_unescape(const char *src, int slen, char *dst, int dlen);
+
+/*
+ * Escape a string `str`, `str_len` into the printer `out`.
+ * Return the number of bytes printed.
+ */
+int json_escape(struct json_out *out, const char *str, size_t str_len);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* CS_FROZEN_FROZEN_H_ */
diff --git a/gs.1 b/gs.1
@@ -0,0 +1,118 @@
+.TH gs 1
+.SH NAME
+.PP
+gs \- gist creator
+.SH SYNOPSIS
+.PP
+\fB\fCgs\fR [\fB\-pPhv\fP] [\fB\-d\fP \fIDESCRIPTION\fP] [\fB\-f\fP \fIFILENAME\fP] [\fB\-u\fP \fIUSER\fP[:\fIPASSWORD\fP] | \fB\-U\fP] [\fIFILES\fP ...]
+.SH DESCRIPTION
+.PP
+Easy way to create Github gists with the command line.
+.SH OPTIONS
+.PP
+\fB\-d\fP \fIDESCRIPTION\fP
+ Set gist description
+.PP
+\fB\-f\fP \fIFILENAME\fP
+ Set file name when reading from \fB\fCstdin\fR
+.PP
+\fB\-p\fP
+ Make gist private
+.PP
+\fB\-P\fP
+ Make gist public (default)
+.PP
+\fB\-u\fP \fIUSER\fP[:\fIPASSWORD\fP]
+ Change the Github account the gist will be posted under. A password can
+ given as well with a separating colon, a prompt is provided if not.
+.PP
+\fB\-U\fP
+ Post gist anonymously (default)
+.PP
+\fB\-h\fP
+ Print help and exit
+.PP
+\fB\-v\fP
+ Print version info and exit
+.SH USAGE
+.PP
+Create a new gist of file \fB\fCfile.txt\fR:
+.PP
+.RS
+.nf
+$ gs file.txt
+https://gist.github.com/<new\-id>
+.fi
+.RE
+.PP
+There is also support for multiple files in a single gist:
+.PP
+.RS
+.nf
+$ gs file.txt list.txt readme.md
+https://gist.github.com/<new\-id>
+.fi
+.RE
+.PP
+The gist's URL can be piped to other programs, for example to your clipboard to
+be pasted else where:
+.PP
+.RS
+.nf
+$ gs file.txt | xsel \-bi
+.fi
+.RE
+.PP
+You can also create a new gist from \fB\fCstdin\fR\&. The file name needs to be supplied
+however:
+.PP
+.RS
+.nf
+$ cmd\-which\-errors | gs \-f log.txt
+https://gist.github.com/<new\-id>
+.fi
+.RE
+.PP
+New gists can be private as well:
+.PP
+.RS
+.nf
+$ gs \-p file.txt
+https://gist.github.com/<new\-id>
+.fi
+.RE
+.PP
+The new gist can be posted under a Github user, a prompt will ask for your
+password:
+.PP
+.RS
+.nf
+$ gs \-u your\-name file.txt
+Github password:
+https://gist.github.com/<new\-id>
+.fi
+.RE
+.PP
+To skip the prompt your password can be supplied after a colon with the
+username:
+.PP
+.RS
+.nf
+$ gs \-u your\-name:password file.txt
+https://gist.github.com/<new\-id>
+.fi
+.RE
+.SH AUTHOR
+.PP
+Ed van Bruggen
+\<edvb54@gmail.com\>
+.SH SEE ALSO
+.PP
+See project page at:
+\<http://edryd.org/projects/gs.html\>
+.PP
+View source code at:
+\<https://github.com/edvb/gs\>
+.SH LICENSE
+.PP
+zlib License
diff --git a/gs.c b/gs.c
@@ -0,0 +1,203 @@
+/* See LICENSE file for copyright and license details. */
+#include <curl/curl.h>
+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "arg.h"
+#include "frozen.h"
+#include "util.h"
+
+/* defines */
+#define GIST_URL "https://api.github.com/gists"
+#define LBUF_SIZE 1024 /* TODO remove BUF_SIZEs */
+#define BUF_SIZE 100000
+
+/* typedefs */
+typedef struct {
+ char *ptr;
+ size_t len;
+} Str;
+
+/* functions */
+static size_t str_write(void *ptr, size_t size, size_t nmemb, Str *s);
+static char *file_str(FILE *fp);
+static char *files_js(char *files[], int filec);
+static void gs_new(char *files[], int filec);
+
+/* variables */
+char *argv0;
+
+#include "config.h"
+
+/* used by cURL to write its response to a Str */
+static size_t
+str_write(void *ptr, size_t size, size_t nmemb, Str *s)
+{
+ size_t nlen = s->len + size*nmemb;
+ s->ptr = erealloc(s->ptr, nlen+1);
+ memcpy(s->ptr+s->len, ptr, size*nmemb);
+ s->ptr[nlen] = '\0';
+ s->len = nlen;
+
+ return size*nmemb;
+}
+
+/* HTTP POST request from content, returning response */
+static Str
+http_post(char *content, long okcode)
+{
+ long code;
+ CURL *curl;
+ CURLcode res;
+ Str resstr;
+
+ resstr.len = 0;
+ resstr.ptr = emalloc(resstr.len+1);
+ resstr.ptr[0] = '\0';
+
+ if (!(curl = curl_easy_init()))
+ die("%s: cURL: could not init", argv0);
+ curl_easy_setopt(curl, CURLOPT_URL, GIST_URL);
+ curl_easy_setopt(curl, CURLOPT_USERAGENT, "gs/"VERSION);
+ if (user) {
+ if (strchr(user, ':')) {
+ curl_easy_setopt(curl, CURLOPT_USERPWD, user);
+ } else {
+ curl_easy_setopt(curl, CURLOPT_USERNAME, user);
+ curl_easy_setopt(curl, CURLOPT_PASSWORD, getpass("Github password: "));
+ }
+ }
+ curl_easy_setopt(curl, CURLOPT_POSTFIELDS, content);
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, str_write);
+ curl_easy_setopt(curl, CURLOPT_WRITEDATA, &resstr);
+ if ((res = curl_easy_perform(curl)) != CURLE_OK)
+ die("%s: cURL: %s", argv0, curl_easy_strerror(res));
+ curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
+ curl_easy_cleanup(curl);
+ if (code != okcode)
+ die("%s: could not create gist: %s", argv0, resstr.ptr);
+
+ return resstr;
+}
+
+/* read file fp into returned string */
+static char *
+file_str(FILE *fp)
+{
+ char lbuf[LBUF_SIZE]; /* buffer for each line */
+ char *str = ecalloc(LBUF_SIZE, sizeof(char)); /* complete file */
+ long flen = 1; /* file length */
+
+ /* loop through each line in the file, append it to str */
+ while (fgets(lbuf, LBUF_SIZE, fp)) {
+ flen += strlen(lbuf);
+ str = erealloc(str, flen);
+ strcat(str, lbuf);
+ }
+
+ return str;
+}
+
+/* turn list of file into returned json string */
+static char *
+files_js(char *files[], int filec)
+{
+ char *fbuf, *js = emalloc(BUF_SIZE*sizeof(char)); /* fbuf: file contents, js: json string returned */
+ int i;
+ FILE *fp = stdin;
+ struct json_out jout = JSON_OUT_BUF(js, BUF_SIZE);
+
+ if (!desc)
+ die("%s: description not given", argv0);
+ json_printf(&jout, "{ description: %Q, public: %B, files: {", desc, pub);
+
+ /* add each file */
+ for (i = 0; !i || i < filec; i++) {
+ if (i) /* insert comma if this is another file */
+ json_printf(&jout, ",");
+ if (filec && !(fp = fopen(files[i], "r")))
+ die("%s: %s: could not load file", argv0, files[i]);
+ if (filec) /* set file name if given */
+ fname = files[i];
+ if (!fname) /* check for file name when using stdin */
+ die("%s: file name not given", argv0);
+ fbuf = file_str(fp);
+ json_printf(&jout, "%Q: { content: %Q }", basename(fname), fbuf);
+ }
+
+ json_printf(&jout, "} }");
+
+ efree(fbuf);
+
+ return js;
+}
+
+static void
+gs_new(char *files[], int filec)
+{
+ char *js, *url;
+ Str resstr;
+
+ js = files_js(files, filec);
+
+ resstr = http_post(js, 201);
+
+ json_scanf(resstr.ptr, resstr.len, "{html_url: %Q}", &url);
+ printf("%s\n", url);
+
+ efree(js);
+ efree(url);
+ efree(resstr.ptr);
+
+}
+
+static void
+usage(const int e)
+{
+ fprintf(stderr, "usage: %s [-pPhv] [-d DESCRIPTION] [-f FILENAME]\n"
+ " [-u USER[:PASSWORD] | -U] [FILES ...]\n", argv0);
+ exit(e);
+}
+
+int
+main(int argc, char *argv[])
+{
+ ARGBEGIN {
+ case 'd':
+ desc = EARGF(usage(1));
+ break;
+ case 'f':
+ fname = EARGF(usage(1));
+ break;
+ case 'p':
+ pub = 0;
+ break;
+ case 'P':
+ pub = 1;
+ break;
+ case 'u':
+ user = EARGF(usage(1));
+ break;
+ case 'U':
+ user = NULL;
+ break;
+ case 'h':
+ usage(0);
+ case 'v':
+ printf("%s v%s (c) 2017 Ed van Bruggen\n", argv0, VERSION);
+ return 0;
+ default:
+ usage(1);
+ } ARGEND;
+
+ curl_global_init(CURL_GLOBAL_ALL);
+
+ gs_new(argv, argc);
+
+ curl_global_cleanup();
+
+ return 0;
+}
diff --git a/util.c b/util.c
@@ -0,0 +1,74 @@
+/* See LICENSE file for copyright and license details. */
+#include <assert.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+void *
+ecalloc(size_t nmemb, size_t size)
+{
+ void *p;
+
+ if (!(p = calloc(nmemb, size)))
+ die("calloc: out of memory");
+
+ return p;
+}
+
+void *
+emalloc(size_t size)
+{
+ void *p;
+
+ if (!(p = malloc(size)))
+ die("malloc: out of memory");
+
+ return p;
+}
+
+void *
+erealloc(void *p, size_t size)
+{
+ if (!(p = realloc(p, size)))
+ die("realloc: out of memory");
+
+ return p;
+}
+
+char *
+estrdup(char *s)
+{
+ if (!(s = strdup(s)))
+ die("strdup: out of memory");
+
+ return s;
+}
+
+void
+efree(void *p)
+{
+ if (p)
+ free(p);
+}
+
+void
+die(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+
+ if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
+ fputc(' ', stderr);
+ perror(NULL);
+ } else {
+ fputc('\n', stderr);
+ }
+
+ exit(1);
+}
diff --git a/util.h b/util.h
@@ -0,0 +1,14 @@
+/* See LICENSE file for copyright and license details. */
+
+#define MAX(A, B) ((A) > (B) ? (A) : (B))
+#define MIN(A, B) ((A) < (B) ? (A) : (B))
+#define BETWEEN(X, A, B) ((A) <= (X) && (X) <= (B))
+#define LEN(X) (sizeof(X) / sizeof((X)[0]))
+
+void *ecalloc(size_t nmemb, size_t size);
+void *emalloc(size_t size);
+void *erealloc(void *p, size_t size);
+char *estrdup(char *s);
+void efree(void *p);
+
+void die(const char *errstr, ...);
