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@@ -0,0 +1,779 @@
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+/****************************************************************************
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+
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+NAME
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+ mjson.c - parse JSON into fixed-extent data structures
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+
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+DESCRIPTION
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+ This module parses a large subset of JSON (JavaScript Object
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+Notation). Unlike more general JSON parsers, it doesn't use malloc(3)
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+and doesn't support polymorphism; you need to give it a set of
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+template structures describing the expected shape of the incoming
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+JSON, and it will error out if that shape is not matched. When the
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+parse succeeds, attribute values will be extracted into static
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+locations specified in the template structures.
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+
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+ The "shape" of a JSON object in the type signature of its
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+attributes (and attribute values, and so on recursively down through
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+all nestings of objects and arrays). This parser is indifferent to
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+the order of attributes at any level, but you have to tell it in
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+advance what the type of each attribute value will be and where the
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+parsed value will be stored. The template structures may supply
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+default values to be used when an expected attribute is omitted.
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+
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+ The preceding paragraph told one fib. A single attribute may
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+actually have a span of multiple specifications with different
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+syntactically distinguishable types (e.g. string vs. real vs. integer
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+vs. boolean, but not signed integer vs. unsigned integer). The parser
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+will match the right spec against the actual data.
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+
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+ The dialect this parses has some limitations. First, it cannot
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+recognize the JSON "null" value. Second, all elements of an array must
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+be of the same type. Third, characters may not be array elements (this
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+restriction could be lifted)
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+
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+ There are separate entry points for beginning a parse of either
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+JSON object or a JSON array. JSON "float" quantities are actually
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+stored as doubles.
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+
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+ This parser processes object arrays in one of two different ways,
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+defending on whether the array subtype is declared as object or
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+structobject.
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+
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+ Object arrays take one base address per object subfield, and are
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+mapped into parallel C arrays (one per subfield). Strings are not
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+supported in this kind of array, as they don't have a "natural" size
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+to use as an offset multiplier.
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+
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+ Structobjects arrays are a way to parse a list of objects to a set
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+of modifications to a corresponding array of C structs. The trick is
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+that the array object initialization has to specify both the C struct
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+array's base address and the stride length (the size of the C struct).
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+If you initialize the offset fields with the correct offsetof calls,
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+everything will work. Strings are supported but all string storage
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+has to be inline in the struct.
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+
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+PERMISSIONS
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+ This file is Copyright (c) 2014 by Eric S. Raymond
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+ BSD terms apply: see the file COPYING in the distribution root for details.
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+
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+***************************************************************************/
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+/* The strptime prototype is not provided unless explicitly requested.
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+ * We also need to set the value high enough to signal inclusion of
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+ * newer features (like clock_gettime). See the POSIX spec for more info:
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+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_02_01_02 */
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+#define _XOPEN_SOURCE 600
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+
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+#include <stdio.h>
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+#include <string.h>
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+#include <stdlib.h>
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+#include <stdbool.h>
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+#include <stdarg.h>
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+#include <ctype.h>
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+#include <errno.h>
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+#include <time.h>
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+#include <math.h> /* for HUGE_VAL */
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+
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+#include "mjson.h"
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+
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+#define DEBUG_ENABLE 1
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+#ifdef DEBUG_ENABLE
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+static int debuglevel = 0;
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+static FILE *debugfp;
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+
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+void json_enable_debug(int level, FILE * fp)
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+/* control the level and destination of debug trace messages */
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+{
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+ debuglevel = level;
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+ debugfp = fp;
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+}
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+
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+static void json_trace(int errlevel, const char *fmt, ...)
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+/* assemble command in printf(3) style */
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+{
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+ if (errlevel <= debuglevel) {
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+ char buf[BUFSIZ];
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+ va_list ap;
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+
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+ (void)strncpy(buf, "json: ", BUFSIZ-1);
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+ buf[BUFSIZ-1] = '\0';
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+ va_start(ap, fmt);
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+ (void)vsnprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), fmt,
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+ ap);
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+ va_end(ap);
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+
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+ (void)fputs(buf, debugfp);
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+ }
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+}
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+
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+# define json_debug_trace(args) (void) json_trace args
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+#else
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+# define json_debug_trace(args) /*@i1@*/do { } while (0)
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+#endif /* DEBUG_ENABLE */
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+
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+/*@-immediatetrans -dependenttrans -usereleased -compdef@*/
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+static /*@null@*/ char *json_target_address(const struct json_attr_t *cursor,
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+ /*@null@*/
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+ const struct json_array_t
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+ *parent, int offset)
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+{
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+ char *targetaddr = NULL;
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+ if (parent == NULL || parent->element_type != t_structobject) {
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+ /* ordinary case - use the address in the cursor structure */
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+ switch (cursor->type) {
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+ case t_ignore:
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+ targetaddr = NULL;
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+ break;
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+ case t_integer:
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+ targetaddr = (char *)&cursor->addr.integer[offset];
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+ break;
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+ case t_uinteger:
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+ targetaddr = (char *)&cursor->addr.uinteger[offset];
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+ break;
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+ case t_time:
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+ case t_real:
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+ targetaddr = (char *)&cursor->addr.real[offset];
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+ break;
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+ case t_string:
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+ targetaddr = cursor->addr.string;
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+ break;
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+ case t_boolean:
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+ targetaddr = (char *)&cursor->addr.boolean[offset];
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+ break;
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+ case t_character:
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+ targetaddr = (char *)&cursor->addr.character[offset];
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+ break;
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+ default:
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+ targetaddr = NULL;
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+ break;
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+ }
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+ } else
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+ /* tricky case - hacking a member in an array of structures */
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+ targetaddr =
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+ parent->arr.objects.base + (offset * parent->arr.objects.stride) +
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+ cursor->addr.offset;
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+ json_debug_trace((1, "Target address for %s (offset %d) is %p\n",
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+ cursor->attribute, offset, targetaddr));
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+ return targetaddr;
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+}
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+
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+#ifdef TIME_ENABLE
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+static double iso8601_to_unix( /*@in@*/ char *isotime)
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+/* ISO8601 UTC to Unix UTC */
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+{
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+ char *dp = NULL;
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+ double usec;
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+ struct tm tm;
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+
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+ /*@i1@*/ dp = strptime(isotime, "%Y-%m-%dT%H:%M:%S", &tm);
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+ if (dp == NULL)
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+ return (double)HUGE_VAL;
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+ if (*dp == '.')
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+ usec = strtod(dp, NULL);
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+ else
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+ usec = 0;
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+ return (double)timegm(&tm) + usec;
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+}
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+#endif /* TIME_ENABLE */
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+
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+/*@-immediatetrans -dependenttrans +usereleased +compdef@*/
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+
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+static int json_internal_read_object(const char *cp,
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+ const struct json_attr_t *attrs,
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+ /*@null@*/
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+ const struct json_array_t *parent,
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+ int offset,
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+ /*@null@*/ const char **end)
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+{
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+ /*@ -nullstate -nullderef -mustfreefresh -nullpass -usedef @*/
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+ enum
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+ { init, await_attr, in_attr, await_value, in_val_string,
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+ in_escape, in_val_token, post_val, post_array
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+ } state = 0;
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+#ifdef DEBUG_ENABLE
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+ char *statenames[] = {
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+ "init", "await_attr", "in_attr", "await_value", "in_val_string",
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+ "in_escape", "in_val_token", "post_val", "post_array",
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+ };
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+#endif /* DEBUG_ENABLE */
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+ char attrbuf[JSON_ATTR_MAX + 1], *pattr = NULL;
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+ char valbuf[JSON_VAL_MAX + 1], *pval = NULL;
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+ bool value_quoted = false;
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+ char uescape[5]; /* enough space for 4 hex digits and a NUL */
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+ const struct json_attr_t *cursor;
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+ int substatus, n, maxlen = 0;
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+ unsigned int u;
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+ const struct json_enum_t *mp;
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+ char *lptr;
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+
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+#ifdef S_SPLINT_S
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+ /* prevents gripes about buffers not being completely defined */
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+ memset(valbuf, '\0', sizeof(valbuf));
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+ memset(attrbuf, '\0', sizeof(attrbuf));
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+#endif /* S_SPLINT_S */
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+
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+ if (end != NULL)
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+ *end = NULL; /* give it a well-defined value on parse failure */
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+
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+ /* stuff fields with defaults in case they're omitted in the JSON input */
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+ for (cursor = attrs; cursor->attribute != NULL; cursor++)
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+ if (!cursor->nodefault) {
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+ lptr = json_target_address(cursor, parent, offset);
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+ if (lptr != NULL)
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+ switch (cursor->type) {
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+ case t_integer:
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+ memcpy(lptr, &cursor->dflt.integer, sizeof(int));
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+ break;
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+ case t_uinteger:
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+ memcpy(lptr, &cursor->dflt.uinteger, sizeof(unsigned int));
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+ break;
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+ case t_time:
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+ case t_real:
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+ memcpy(lptr, &cursor->dflt.real, sizeof(double));
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+ break;
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+ case t_string:
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+ if (parent != NULL
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+ && parent->element_type != t_structobject
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+ && offset > 0)
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+ return JSON_ERR_NOPARSTR;
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+ lptr[0] = '\0';
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+ break;
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+ case t_boolean:
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+ memcpy(lptr, &cursor->dflt.boolean, sizeof(bool));
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+ break;
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+ case t_character:
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+ lptr[0] = cursor->dflt.character;
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+ break;
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+ case t_object: /* silences a compiler warning */
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+ case t_structobject:
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+ case t_array:
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+ case t_check:
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+ case t_ignore:
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+ break;
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+ }
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+ }
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+
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+ json_debug_trace((1, "JSON parse of '%s' begins.\n", cp));
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+
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+ /* parse input JSON */
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+ for (; *cp != '\0'; cp++) {
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+ json_debug_trace((2, "State %-14s, looking at '%c' (%p)\n",
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+ statenames[state], *cp, cp));
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+ switch (state) {
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+ case init:
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+ if (isspace((unsigned char) *cp))
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+ continue;
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+ else if (*cp == '{')
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+ state = await_attr;
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+ else {
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+ json_debug_trace((1,
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+ "Non-WS when expecting object start.\n"));
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+ if (end != NULL)
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+ *end = cp;
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+ return JSON_ERR_OBSTART;
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+ }
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+ break;
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+ case await_attr:
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+ if (isspace((unsigned char) *cp))
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+ continue;
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+ else if (*cp == '"') {
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+ state = in_attr;
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+ pattr = attrbuf;
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+ if (end != NULL)
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+ *end = cp;
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+ } else if (*cp == '}')
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+ break;
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+ else {
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+ json_debug_trace((1, "Non-WS when expecting attribute.\n"));
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+ if (end != NULL)
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+ *end = cp;
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+ return JSON_ERR_ATTRSTART;
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+ }
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+ break;
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+ case in_attr:
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+ if (pattr == NULL)
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+ /* don't update end here, leave at attribute start */
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+ return JSON_ERR_NULLPTR;
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+ if (*cp == '"') {
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+ *pattr++ = '\0';
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+ json_debug_trace((1, "Collected attribute name %s\n",
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+ attrbuf));
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+ for (cursor = attrs; cursor->attribute != NULL; cursor++) {
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+ json_debug_trace((2, "Checking against %s\n",
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+ cursor->attribute));
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+ if (strcmp(cursor->attribute, attrbuf) == 0)
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+ break;
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+ }
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+ if (cursor->attribute == NULL) {
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+ json_debug_trace((1,
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+ "Unknown attribute name '%s' (attributes begin with '%s').\n",
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+ attrbuf, attrs->attribute));
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+ /* don't update end here, leave at attribute start */
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+ return JSON_ERR_BADATTR;
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+ }
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+ state = await_value;
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+ if (cursor->type == t_string)
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+ maxlen = (int)cursor->len - 1;
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+ else if (cursor->type == t_check)
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+ maxlen = (int)strlen(cursor->dflt.check);
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+ else if (cursor->type == t_time || cursor->type == t_ignore)
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+ maxlen = JSON_VAL_MAX;
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+ else if (cursor->map != NULL)
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+ maxlen = (int)sizeof(valbuf) - 1;
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+ pval = valbuf;
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+ } else if (pattr >= attrbuf + JSON_ATTR_MAX - 1) {
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+ json_debug_trace((1, "Attribute name too long.\n"));
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+ /* don't update end here, leave at attribute start */
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+ return JSON_ERR_ATTRLEN;
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+ } else
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+ *pattr++ = *cp;
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+ break;
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+ case await_value:
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+ if (isspace((unsigned char) *cp) || *cp == ':')
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+ continue;
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+ else if (*cp == '[') {
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+ if (cursor->type != t_array) {
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+ json_debug_trace((1,
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+ "Saw [ when not expecting array.\n"));
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+ if (end != NULL)
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+ *end = cp;
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+ return JSON_ERR_NOARRAY;
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+ }
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+ substatus = json_read_array(cp, &cursor->addr.array, &cp);
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+ if (substatus != 0)
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+ return substatus;
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+ state = post_array;
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+ } else if (cursor->type == t_array) {
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+ json_debug_trace((1,
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+ "Array element was specified, but no [.\n"));
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+ if (end != NULL)
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+ *end = cp;
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+ return JSON_ERR_NOBRAK;
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+ } else if (*cp == '"') {
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+ value_quoted = true;
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+ state = in_val_string;
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+ pval = valbuf;
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+ } else {
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+ value_quoted = false;
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+ state = in_val_token;
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+ pval = valbuf;
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+ *pval++ = *cp;
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+ }
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+ break;
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+ case in_val_string:
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+ if (pval == NULL)
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+ /* don't update end here, leave at value start */
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+ return JSON_ERR_NULLPTR;
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+ if (*cp == '\\')
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+ state = in_escape;
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+ else if (*cp == '"') {
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+ *pval++ = '\0';
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+ json_debug_trace((1, "Collected string value %s\n", valbuf));
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+ state = post_val;
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+ } else if (pval > valbuf + JSON_VAL_MAX - 1
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+ || pval > valbuf + maxlen) {
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+ json_debug_trace((1, "String value too long.\n"));
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+ /* don't update end here, leave at value start */
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+ return JSON_ERR_STRLONG; /* */
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+ } else
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+ *pval++ = *cp;
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+ break;
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+ case in_escape:
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+ if (pval == NULL)
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+ /* don't update end here, leave at value start */
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+ return JSON_ERR_NULLPTR;
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+ switch (*cp) {
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+ case 'b':
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+ *pval++ = '\b';
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+ break;
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+ case 'f':
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+ *pval++ = '\f';
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+ break;
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+ case 'n':
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+ *pval++ = '\n';
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+ break;
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+ case 'r':
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+ *pval++ = '\r';
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+ break;
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+ case 't':
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+ *pval++ = '\t';
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+ break;
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+ case 'u':
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+ for (n = 0; n < 4 && cp[n] != '\0'; n++)
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+ uescape[n] = *cp++;
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+ --cp;
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+ (void)sscanf(uescape, "%04x", &u);
|
|
|
+ *pval++ = (char)u; /* will truncate values above 0xff */
|
|
|
+ break;
|
|
|
+ default: /* handles double quote and solidus */
|
|
|
+ *pval++ = *cp;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ state = in_val_string;
|
|
|
+ break;
|
|
|
+ case in_val_token:
|
|
|
+ if (pval == NULL)
|
|
|
+ /* don't update end here, leave at value start */
|
|
|
+ return JSON_ERR_NULLPTR;
|
|
|
+ if (isspace((unsigned char) *cp) || *cp == ',' || *cp == '}') {
|
|
|
+ *pval = '\0';
|
|
|
+ json_debug_trace((1, "Collected token value %s.\n", valbuf));
|
|
|
+ state = post_val;
|
|
|
+ if (*cp == '}' || *cp == ',')
|
|
|
+ --cp;
|
|
|
+ } else if (pval > valbuf + JSON_VAL_MAX - 1) {
|
|
|
+ json_debug_trace((1, "Token value too long.\n"));
|
|
|
+ /* don't update end here, leave at value start */
|
|
|
+ return JSON_ERR_TOKLONG;
|
|
|
+ } else
|
|
|
+ *pval++ = *cp;
|
|
|
+ break;
|
|
|
+ case post_val:
|
|
|
+ /*
|
|
|
+ * We know that cursor points at the first spec matching
|
|
|
+ * the current attribute. We don't know that it's *the*
|
|
|
+ * correct spec; our dialect allows there to be any number
|
|
|
+ * of adjacent ones with the same attrname but different
|
|
|
+ * types. Here's where we try to seek forward for a
|
|
|
+ * matching type/attr pair if we're not looking at one.
|
|
|
+ */
|
|
|
+ for (;;) {
|
|
|
+ int seeking = cursor->type;
|
|
|
+ if (value_quoted && (cursor->type == t_string || cursor->type == t_time))
|
|
|
+ break;
|
|
|
+ if ((strcmp(valbuf, "true")==0 || strcmp(valbuf, "false")==0)
|
|
|
+ && seeking == t_boolean)
|
|
|
+ break;
|
|
|
+ if (isdigit((unsigned char) valbuf[0])) {
|
|
|
+ bool decimal = strchr(valbuf, '.') != NULL;
|
|
|
+ if (decimal && seeking == t_real)
|
|
|
+ break;
|
|
|
+ if (!decimal && (seeking == t_integer || seeking == t_uinteger))
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ if (cursor[1].attribute==NULL) /* out of possiblities */
|
|
|
+ break;
|
|
|
+ if (strcmp(cursor[1].attribute, attrbuf)!=0)
|
|
|
+ break;
|
|
|
+ ++cursor;
|
|
|
+ }
|
|
|
+ if (value_quoted
|
|
|
+ && (cursor->type != t_string && cursor->type != t_character
|
|
|
+ && cursor->type != t_check && cursor->type != t_time
|
|
|
+ && cursor->type != t_ignore && cursor->map == 0)) {
|
|
|
+ json_debug_trace((1,
|
|
|
+ "Saw quoted value when expecting non-string.\n"));
|
|
|
+ return JSON_ERR_QNONSTRING;
|
|
|
+ }
|
|
|
+ if (!value_quoted
|
|
|
+ && (cursor->type == t_string || cursor->type == t_check
|
|
|
+ || cursor->type == t_time || cursor->map != 0)) {
|
|
|
+ json_debug_trace((1,
|
|
|
+ "Didn't see quoted value when expecting string.\n"));
|
|
|
+ return JSON_ERR_NONQSTRING;
|
|
|
+ }
|
|
|
+ if (cursor->map != 0) {
|
|
|
+ for (mp = cursor->map; mp->name != NULL; mp++)
|
|
|
+ if (strcmp(mp->name, valbuf) == 0) {
|
|
|
+ goto foundit;
|
|
|
+ }
|
|
|
+ json_debug_trace((1, "Invalid enumerated value string %s.\n",
|
|
|
+ valbuf));
|
|
|
+ return JSON_ERR_BADENUM;
|
|
|
+ foundit:
|
|
|
+ (void)snprintf(valbuf, sizeof(valbuf), "%d", mp->value);
|
|
|
+ }
|
|
|
+ lptr = json_target_address(cursor, parent, offset);
|
|
|
+ if (lptr != NULL)
|
|
|
+ switch (cursor->type) {
|
|
|
+ case t_integer:
|
|
|
+ {
|
|
|
+ int tmp = atoi(valbuf);
|
|
|
+ memcpy(lptr, &tmp, sizeof(int));
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case t_uinteger:
|
|
|
+ {
|
|
|
+ unsigned int tmp = (unsigned int)atoi(valbuf);
|
|
|
+ memcpy(lptr, &tmp, sizeof(unsigned int));
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case t_time:
|
|
|
+#ifdef TIME_ENABLE
|
|
|
+ {
|
|
|
+ double tmp = iso8601_to_unix(valbuf);
|
|
|
+ memcpy(lptr, &tmp, sizeof(double));
|
|
|
+ }
|
|
|
+#endif /* TIME_ENABLE */
|
|
|
+ break;
|
|
|
+ case t_real:
|
|
|
+ {
|
|
|
+ double tmp = atof(valbuf);
|
|
|
+ memcpy(lptr, &tmp, sizeof(double));
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case t_string:
|
|
|
+ if (parent != NULL
|
|
|
+ && parent->element_type != t_structobject
|
|
|
+ && offset > 0)
|
|
|
+ return JSON_ERR_NOPARSTR;
|
|
|
+ (void)strncpy(lptr, valbuf, cursor->len);
|
|
|
+ valbuf[sizeof(valbuf)-1] = '\0';
|
|
|
+ break;
|
|
|
+ case t_boolean:
|
|
|
+ {
|
|
|
+ bool tmp = (strcmp(valbuf, "true") == 0);
|
|
|
+ memcpy(lptr, &tmp, sizeof(bool));
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case t_character:
|
|
|
+ if (strlen(valbuf) > 1)
|
|
|
+ /* don't update end here, leave at value start */
|
|
|
+ return JSON_ERR_STRLONG;
|
|
|
+ else
|
|
|
+ lptr[0] = valbuf[0];
|
|
|
+ break;
|
|
|
+ case t_ignore: /* silences a compiler warning */
|
|
|
+ case t_object: /* silences a compiler warning */
|
|
|
+ case t_structobject:
|
|
|
+ case t_array:
|
|
|
+ break;
|
|
|
+ case t_check:
|
|
|
+ if (strcmp(cursor->dflt.check, valbuf) != 0) {
|
|
|
+ json_debug_trace((1,
|
|
|
+ "Required attribute value %s not present.\n",
|
|
|
+ cursor->dflt.check));
|
|
|
+ /* don't update end here, leave at start of attribute */
|
|
|
+ return JSON_ERR_CHECKFAIL;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ /*@fallthrough@*/
|
|
|
+ case post_array:
|
|
|
+ if (isspace((unsigned char) *cp))
|
|
|
+ continue;
|
|
|
+ else if (*cp == ',')
|
|
|
+ state = await_attr;
|
|
|
+ else if (*cp == '}') {
|
|
|
+ ++cp;
|
|
|
+ goto good_parse;
|
|
|
+ } else {
|
|
|
+ json_debug_trace((1, "Garbage while expecting comma or }\n"));
|
|
|
+ if (end != NULL)
|
|
|
+ *end = cp;
|
|
|
+ return JSON_ERR_BADTRAIL;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ good_parse:
|
|
|
+ /* in case there's another object following, consume trailing WS */
|
|
|
+ while (isspace((unsigned char) *cp))
|
|
|
+ ++cp;
|
|
|
+ if (end != NULL)
|
|
|
+ *end = cp;
|
|
|
+ json_debug_trace((1, "JSON parse ends.\n"));
|
|
|
+ return 0;
|
|
|
+ /*@ +nullstate +nullderef +mustfreefresh +nullpass +usedef @*/
|
|
|
+}
|
|
|
+
|
|
|
+int json_read_array(const char *cp, const struct json_array_t *arr,
|
|
|
+ const char **end)
|
|
|
+{
|
|
|
+ /*@-nullstate -onlytrans@*/
|
|
|
+ int substatus, offset, arrcount;
|
|
|
+ char *tp;
|
|
|
+
|
|
|
+ if (end != NULL)
|
|
|
+ *end = NULL; /* give it a well-defined value on parse failure */
|
|
|
+
|
|
|
+ json_debug_trace((1, "Entered json_read_array()\n"));
|
|
|
+
|
|
|
+ while (isspace((unsigned char) *cp))
|
|
|
+ cp++;
|
|
|
+ if (*cp != '[') {
|
|
|
+ json_debug_trace((1, "Didn't find expected array start\n"));
|
|
|
+ return JSON_ERR_ARRAYSTART;
|
|
|
+ } else
|
|
|
+ cp++;
|
|
|
+
|
|
|
+ tp = arr->arr.strings.store;
|
|
|
+ arrcount = 0;
|
|
|
+
|
|
|
+ /* Check for empty array */
|
|
|
+ while (isspace((unsigned char) *cp))
|
|
|
+ cp++;
|
|
|
+ if (*cp == ']')
|
|
|
+ goto breakout;
|
|
|
+
|
|
|
+ for (offset = 0; offset < arr->maxlen; offset++) {
|
|
|
+ char *ep = NULL;
|
|
|
+ json_debug_trace((1, "Looking at %s\n", cp));
|
|
|
+ switch (arr->element_type) {
|
|
|
+ case t_string:
|
|
|
+ if (isspace((unsigned char) *cp))
|
|
|
+ cp++;
|
|
|
+ if (*cp != '"')
|
|
|
+ return JSON_ERR_BADSTRING;
|
|
|
+ else
|
|
|
+ ++cp;
|
|
|
+ arr->arr.strings.ptrs[offset] = tp;
|
|
|
+ for (; tp - arr->arr.strings.store < arr->arr.strings.storelen;
|
|
|
+ tp++)
|
|
|
+ if (*cp == '"') {
|
|
|
+ ++cp;
|
|
|
+ *tp++ = '\0';
|
|
|
+ goto stringend;
|
|
|
+ } else if (*cp == '\0') {
|
|
|
+ json_debug_trace((1,
|
|
|
+ "Bad string syntax in string list.\n"));
|
|
|
+ return JSON_ERR_BADSTRING;
|
|
|
+ } else {
|
|
|
+ *tp = *cp++;
|
|
|
+ }
|
|
|
+ json_debug_trace((1, "Bad string syntax in string list.\n"));
|
|
|
+ return JSON_ERR_BADSTRING;
|
|
|
+ stringend:
|
|
|
+ break;
|
|
|
+ case t_object:
|
|
|
+ case t_structobject:
|
|
|
+ substatus =
|
|
|
+ json_internal_read_object(cp, arr->arr.objects.subtype, arr,
|
|
|
+ offset, &cp);
|
|
|
+ if (substatus != 0) {
|
|
|
+ if (end != NULL)
|
|
|
+ end = &cp;
|
|
|
+ return substatus;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case t_integer:
|
|
|
+ arr->arr.integers.store[offset] = (int)strtol(cp, &ep, 0);
|
|
|
+ if (ep == cp)
|
|
|
+ return JSON_ERR_BADNUM;
|
|
|
+ else
|
|
|
+ cp = ep;
|
|
|
+ break;
|
|
|
+ case t_uinteger:
|
|
|
+ arr->arr.uintegers.store[offset] = (unsigned int)strtoul(cp, &ep, 0);
|
|
|
+ if (ep == cp)
|
|
|
+ return JSON_ERR_BADNUM;
|
|
|
+ else
|
|
|
+ cp = ep;
|
|
|
+ break;
|
|
|
+#ifdef TIME_ENABLE
|
|
|
+ case t_time:
|
|
|
+ if (*cp != '"')
|
|
|
+ return JSON_ERR_BADSTRING;
|
|
|
+ else
|
|
|
+ ++cp;
|
|
|
+ arr->arr.reals.store[offset] = iso8601_to_unix((char *)cp);
|
|
|
+ if (arr->arr.reals.store[offset] >= HUGE_VAL)
|
|
|
+ return JSON_ERR_BADNUM;
|
|
|
+ while (*cp && *cp != '"')
|
|
|
+ cp++;
|
|
|
+ if (*cp != '"')
|
|
|
+ return JSON_ERR_BADSTRING;
|
|
|
+ else
|
|
|
+ ++cp;
|
|
|
+ break;
|
|
|
+#endif /* TIME_ENABLE */
|
|
|
+ case t_real:
|
|
|
+ arr->arr.reals.store[offset] = strtod(cp, &ep);
|
|
|
+ if (ep == cp)
|
|
|
+ return JSON_ERR_BADNUM;
|
|
|
+ else
|
|
|
+ cp = ep;
|
|
|
+ break;
|
|
|
+ case t_boolean:
|
|
|
+ if (strncmp(cp, "true", 4) == 0) {
|
|
|
+ arr->arr.booleans.store[offset] = true;
|
|
|
+ cp += 4;
|
|
|
+ }
|
|
|
+ else if (strncmp(cp, "false", 5) == 0) {
|
|
|
+ arr->arr.booleans.store[offset] = false;
|
|
|
+ cp += 5;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+ case t_character:
|
|
|
+ case t_array:
|
|
|
+ case t_check:
|
|
|
+ case t_ignore:
|
|
|
+ json_debug_trace((1, "Invalid array subtype.\n"));
|
|
|
+ return JSON_ERR_SUBTYPE;
|
|
|
+ }
|
|
|
+ arrcount++;
|
|
|
+ if (isspace((unsigned char) *cp))
|
|
|
+ cp++;
|
|
|
+ if (*cp == ']') {
|
|
|
+ json_debug_trace((1, "End of array found.\n"));
|
|
|
+ goto breakout;
|
|
|
+ } else if (*cp == ',')
|
|
|
+ cp++;
|
|
|
+ else {
|
|
|
+ json_debug_trace((1, "Bad trailing syntax on array.\n"));
|
|
|
+ return JSON_ERR_BADSUBTRAIL;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ json_debug_trace((1, "Too many elements in array.\n"));
|
|
|
+ if (end != NULL)
|
|
|
+ *end = cp;
|
|
|
+ return JSON_ERR_SUBTOOLONG;
|
|
|
+ breakout:
|
|
|
+ if (arr->count != NULL)
|
|
|
+ *(arr->count) = arrcount;
|
|
|
+ if (end != NULL)
|
|
|
+ *end = cp;
|
|
|
+ /*@ -nullderef @*/
|
|
|
+ json_debug_trace((1, "leaving json_read_array() with %d elements\n",
|
|
|
+ arrcount));
|
|
|
+ /*@ +nullderef @*/
|
|
|
+ return 0;
|
|
|
+ /*@+nullstate +onlytrans@*/
|
|
|
+}
|
|
|
+
|
|
|
+int json_read_object(const char *cp, const struct json_attr_t *attrs,
|
|
|
+ /*@null@*/ const char **end)
|
|
|
+{
|
|
|
+ int st;
|
|
|
+
|
|
|
+ json_debug_trace((1, "json_read_object() sees '%s'\n", cp));
|
|
|
+ st = json_internal_read_object(cp, attrs, NULL, 0, end);
|
|
|
+ return st;
|
|
|
+}
|
|
|
+
|
|
|
+const /*@observer@*/ char *json_error_string(int err)
|
|
|
+{
|
|
|
+ const char *errors[] = {
|
|
|
+ "unknown error while parsing JSON",
|
|
|
+ "non-whitespace when expecting object start",
|
|
|
+ "non-whitespace when expecting attribute start",
|
|
|
+ "unknown attribute name",
|
|
|
+ "attribute name too long",
|
|
|
+ "saw [ when not expecting array",
|
|
|
+ "array element specified, but no [",
|
|
|
+ "string value too long",
|
|
|
+ "token value too long",
|
|
|
+ "garbage while expecting comma or } or ]",
|
|
|
+ "didn't find expected array start",
|
|
|
+ "error while parsing object array",
|
|
|
+ "too many array elements",
|
|
|
+ "garbage while expecting array comma",
|
|
|
+ "unsupported array element type",
|
|
|
+ "error while string parsing",
|
|
|
+ "check attribute not matched",
|
|
|
+ "can't support strings in parallel arrays",
|
|
|
+ "invalid enumerated value",
|
|
|
+ "saw quoted value when expecting nonstring",
|
|
|
+ "didn't see quoted value when expecting string",
|
|
|
+ "other data conversion error",
|
|
|
+ "unexpected null value or attribute pointer",
|
|
|
+ };
|
|
|
+
|
|
|
+ if (err <= 0 || err >= (int)(sizeof(errors) / sizeof(errors[0])))
|
|
|
+ return errors[0];
|
|
|
+ else
|
|
|
+ return errors[err];
|
|
|
+}
|
|
|
+
|
|
|
+/* end */
|
|
|
+
|
TheOnlyJoey