oysteikt/heimdal
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handle quotes

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This commit is contained in:
Love Hörnquist Åstrand
2011-11-21 08:27:43 -08:00
parent 8a0e0f9472
commit 43ac50913b
1 changed files with 262 additions and 38 deletions
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300
base/json.c
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@@ -34,11 +34,16 @@
*/
#include "baselocl.h"
#include <ctype.h>
int
heim_base2json(heim_object_t obj,
void (*out)(char *, void *), void *ctx)
void (*out)(const char *, void *), void *ctx);
int
heim_base2json(heim_object_t obj,
void (*out)(const char *, void *), void *ctx)
{
heim_tid_t type = heim_get_tid(obj);
__block int fail = 0, needcomma = 0;
@@ -92,55 +97,274 @@ heim_base2json(heim_object_t obj,
return fail;
}
static int
parse_dict(heim_dict_t dict, char * const *pp, size_t *len)
{
const char *p = *pp;
while (*len) {
(*len)--;
struct parse_ctx {
unsigned long lineno;
const uint8_t *p;
const uint8_t *pstart;
const uint8_t *pend;
heim_error_t error;
};
if (*p == '\n') {
p += 1;
} else if (isspace(*p)) {
p += 1;
} else if (*p == '}') {
*pp = p + 1;
static heim_object_t
parse_value(struct parse_ctx *ctx);
static int
white_spaces(struct parse_ctx *ctx)
{
while (ctx->p < ctx->pend) {
uint8_t c = *ctx->p;
if (c == ' ' || c == '\t' || c == '\r') {
} else if (c == '\n') {
ctx->lineno++;
} else
return 0;
} else {
}
(ctx->p)++;
}
return ENOENT;
return -1;
}
static int
is_number(uint8_t n)
{
return ('0' <= n && n <= '9');
}
static heim_number_t
parse_number(struct parse_ctx *ctx)
{
int number = 0, neg = 1;
if (ctx->p >= ctx->pend)
return NULL;
if (*ctx->p == '-') {
neg = -1;
ctx->p += 1;
}
while (ctx->p < ctx->pend) {
if (is_number(*ctx->p)) {
number = (number * 10) + (*ctx->p - '0');
} else {
break;
}
ctx->p += 1;
}
return heim_number_create(number * neg);
}
static heim_string_t
parse_string(struct parse_ctx *ctx)
{
const uint8_t *start;
heim_assert(*ctx->p == '"', "string doesnt' start with \"");
start = ++ctx->p;
while (ctx->p < ctx->pend) {
if (*ctx->p == '\n') {
ctx->lineno++;
} else if (*ctx->p == '"') {
heim_object_t o;
/* XXX handle quotes */
o = heim_string_create_with_bytes(start, ctx->p - start);
ctx->p += 1;
return o;
}
ctx->p += 1;
}
ctx->error = heim_error_create(EINVAL, "ran out of string");
return NULL;
}
static int
parse_pair(heim_dict_t dict, struct parse_ctx *ctx)
{
heim_string_t key;
heim_object_t value;
if (white_spaces(ctx))
return -1;
if (*ctx->p == '}')
return 0;
key = parse_string(ctx);
if (key == NULL)
return -1;
if (white_spaces(ctx))
return -1;
if (*ctx->p != ':') {
heim_release(key);
return -1;
}
ctx->p += 1;
if (white_spaces(ctx)) {
heim_release(key);
return -1;
}
value = parse_value(ctx);
if (value == NULL) {
heim_release(key);
return -1;
}
heim_dict_set_value(dict, key, value);
heim_release(key);
heim_release(value);
if (white_spaces(ctx))
return -1;
if (*ctx->p == '}') {
ctx->p++;
return 0;
} else if (*ctx->p == ',') {
ctx->p++;
return 1;
}
return -1;
}
static heim_dict_t
parse_dict(struct parse_ctx *ctx)
{
heim_dict_t dict = heim_dict_create(11);
int ret;
heim_assert(*ctx->p == '{', "string doesn't start with {");
ctx->p += 1;
while ((ret = parse_pair(dict, ctx)) > 0)
;
if (ret < 0) {
heim_release(dict);
return NULL;
}
return dict;
}
static int
parse_item(heim_array_t array, struct parse_ctx *ctx)
{
heim_object_t value;
if (white_spaces(ctx))
return -1;
if (*ctx->p == ']')
return 0;
value = parse_value(ctx);
if (value == NULL)
return -1;
heim_array_append_value(array, value);
heim_release(value);
if (white_spaces(ctx))
return -1;
if (*ctx->p == ']') {
ctx->p++;
return 0;
} else if (*ctx->p == ',') {
ctx->p++;
return 1;
}
return -1;
}
static heim_array_t
parse_array(struct parse_ctx *ctx)
{
heim_array_t array = heim_array_create();
int ret;
heim_assert(*ctx->p == '[', "array doesn't start with [");
ctx->p += 1;
while ((ret = parse_item(array, ctx)) > 0)
;
if (ret < 0) {
heim_release(array);
return NULL;
}
return array;
}
static heim_object_t
parse_value(struct parse_ctx *ctx)
{
size_t len;
if (white_spaces(ctx))
return NULL;
if (*ctx->p == '"') {
return parse_string(ctx);
} else if (*ctx->p == '{') {
return parse_dict(ctx);
} else if (*ctx->p == '[') {
return parse_array(ctx);
} else if (is_number(*ctx->p) || *ctx->p == '-') {
return parse_number(ctx);
}
len = ctx->pend - ctx->p;
if (len >= 4 && memcmp(ctx->p, "null", 4) == 0) {
ctx->p += 4;
return heim_null_create();
} else if (len >= 4 && strncasecmp((char *)ctx->p, "true", 4) == 0) {
ctx->p += 4;
return heim_bool_create(1);
} else if (len >= 5 && strncasecmp((char *)ctx->p, "false", 5) == 0) {
ctx->p += 5;
return heim_bool_create(0);
}
ctx->error = heim_error_create(EINVAL, "unknown char %c at %lu line %lu",
(char)*ctx->p,
(unsigned long)(ctx->p - ctx->pstart),
ctx->lineno);
return NULL;
}
heim_object_t
heim_json2base(const void *data, size_t length)
heim_json_create(const char *string, heim_error_t *error)
{
heim_array_t stack;
heim_object_t o = NULL;
const char *p = data;
unsigned long lineno = 1;
return heim_json_create_with_bytes(string, strlen(string), error);
}
while (length) {
length--;
heim_object_t
heim_json_create_with_bytes(const void *data, size_t length, heim_error_t *error)
{
struct parse_ctx ctx;
heim_object_t o;
if (*p == '\n') {
lineno++;
} else if (isspace((int)*p)) {
;
} else if (*p == '{') {
o = heim_dict_create();
ctx.lineno = 1;
ctx.p = data;
ctx.pstart = data;
ctx.pend = ((uint8_t *)data) + length;
ctx.error = NULL;
if ((ret = parse_dict(&p, &length)) != 0)
goto out;
} else
abort();
}
o = parse_value(&ctx);
out:
if (ret && o) {
heim_release(o);
o = NULL;
if (o == NULL && error) {
*error = ctx.error;
} else if (ctx.error) {
heim_release(ctx.error);
}
return o;