Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 483 insertions, 0 deletions

diff --git a/third_party/pipewire/spa/utils/json.h b/third_party/pipewire/spa/utils/json.h
new file mode 100644
index 0000000000..73cad7f596
--- /dev/null
+++ b/third_party/pipewire/spa/utils/json.h
@@ -0,0 +1,483 @@
+/* Simple Plugin API
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef SPA_UTILS_JSON_H
+#define SPA_UTILS_JSON_H
+
+#ifdef __cplusplus
+extern "C" {
+#else
+#include <stdbool.h>
+#endif
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <math.h>
+#include <float.h>
+
+#include <spa/utils/defs.h>
+#include <spa/utils/string.h>
+
+/** \defgroup spa_json JSON
+ * Relaxed JSON variant parsing
+ */
+
+/**
+ * \addtogroup spa_json
+ * \{
+ */
+
+/* a simple JSON compatible tokenizer */
+struct spa_json {
+	const char *cur;
+	const char *end;
+	struct spa_json *parent;
+	uint32_t state;
+	uint32_t depth;
+};
+
+#define SPA_JSON_INIT(data,size) (struct spa_json) { (data), (data)+(size), }
+
+static inline void spa_json_init(struct spa_json * iter, const char *data, size_t size)
+{
+	*iter =  SPA_JSON_INIT(data, size);
+}
+#define SPA_JSON_ENTER(iter) (struct spa_json) { (iter)->cur, (iter)->end, (iter), }
+
+static inline void spa_json_enter(struct spa_json * iter, struct spa_json * sub)
+{
+	*sub = SPA_JSON_ENTER(iter);
+}
+
+#define SPA_JSON_SAVE(iter) (struct spa_json) { (iter)->cur, (iter)->end, }
+
+/** Get the next token. \a value points to the token and the return value
+ * is the length. */
+static inline int spa_json_next(struct spa_json * iter, const char **value)
+{
+	int utf8_remain = 0;
+	enum { __NONE, __STRUCT, __BARE, __STRING, __UTF8, __ESC, __COMMENT };
+
+	*value = iter->cur;
+	for (; iter->cur < iter->end; iter->cur++) {
+		unsigned char cur = (unsigned char)*iter->cur;
+ again:
+		switch (iter->state) {
+		case __NONE:
+			iter->state = __STRUCT;
+			iter->depth = 0;
+			goto again;
+		case __STRUCT:
+			switch (cur) {
+			case '\0': case '\t': case ' ': case '\r': case '\n': case ':': case '=': case ',':
+				continue;
+			case '#':
+				iter->state = __COMMENT;
+				continue;
+			case '"':
+				*value = iter->cur;
+				iter->state = __STRING;
+				continue;
+			case '[': case '{':
+				*value = iter->cur;
+				if (++iter->depth > 1)
+					continue;
+				iter->cur++;
+				return 1;
+			case '}': case ']':
+				if (iter->depth == 0) {
+					if (iter->parent)
+						iter->parent->cur = iter->cur;
+					return 0;
+				}
+				--iter->depth;
+				continue;
+			default:
+				*value = iter->cur;
+				iter->state = __BARE;
+			}
+			continue;
+		case __BARE:
+			switch (cur) {
+			case '\t': case ' ': case '\r': case '\n':
+			case ':': case ',': case '=': case ']': case '}':
+				iter->state = __STRUCT;
+				if (iter->depth > 0)
+					goto again;
+				return iter->cur - *value;
+			}
+			continue;
+		case __STRING:
+			switch (cur) {
+			case '\\':
+				iter->state = __ESC;
+				continue;
+			case '"':
+				iter->state = __STRUCT;
+				if (iter->depth > 0)
+					continue;
+				return ++iter->cur - *value;
+			case 240 ... 247:
+				utf8_remain++;
+				SPA_FALLTHROUGH;
+			case 224 ... 239:
+				utf8_remain++;
+				SPA_FALLTHROUGH;
+			case 192 ... 223:
+				utf8_remain++;
+				iter->state = __UTF8;
+				continue;
+			default:
+				if (cur >= 32 && cur <= 126)
+					continue;
+			}
+			return -1;
+		case __UTF8:
+			switch (cur) {
+			case 128 ... 191:
+				if (--utf8_remain == 0)
+					iter->state = __STRING;
+				continue;
+			}
+			return -1;
+		case __ESC:
+			switch (cur) {
+			case '"': case '\\': case '/': case 'b': case 'f':
+			case 'n': case 'r': case 't': case 'u':
+				iter->state = __STRING;
+				continue;
+			}
+			return -1;
+		case __COMMENT:
+			switch (cur) {
+			case '\n': case '\r':
+				iter->state = __STRUCT;
+			}
+		}
+
+	}
+	if (iter->depth != 0)
+		return -1;
+	if (iter->state != __STRUCT) {
+		iter->state = __STRUCT;
+		return iter->cur - *value;
+	}
+	return 0;
+}
+
+static inline int spa_json_enter_container(struct spa_json *iter, struct spa_json *sub, char type)
+{
+	const char *value;
+	if (spa_json_next(iter, &value) <= 0 || *value != type)
+		return -1;
+	spa_json_enter(iter, sub);
+	return 1;
+}
+
+static inline int spa_json_is_container(const char *val, int len)
+{
+	return len > 0 && (*val == '{'  || *val == '[');
+}
+
+static inline int spa_json_container_len(struct spa_json *iter, const char *value, int len)
+{
+	const char *val;
+	struct spa_json sub;
+	spa_json_enter(iter, &sub);
+	while (spa_json_next(&sub, &val) > 0);
+	return sub.cur + 1 - value;
+}
+
+/* object */
+static inline int spa_json_is_object(const char *val, int len)
+{
+	return len > 0 && *val == '{';
+}
+static inline int spa_json_enter_object(struct spa_json *iter, struct spa_json *sub)
+{
+	return spa_json_enter_container(iter, sub, '{');
+}
+
+/* array */
+static inline bool spa_json_is_array(const char *val, int len)
+{
+	return len > 0 && *val == '[';
+}
+static inline int spa_json_enter_array(struct spa_json *iter, struct spa_json *sub)
+{
+	return spa_json_enter_container(iter, sub, '[');
+}
+
+/* null */
+static inline bool spa_json_is_null(const char *val, int len)
+{
+	return len == 4 && strncmp(val, "null", 4) == 0;
+}
+
+/* float */
+static inline int spa_json_parse_float(const char *val, int len, float *result)
+{
+	char *end;
+	*result = spa_strtof(val, &end);
+	return len > 0 && end == val + len;
+}
+
+static inline bool spa_json_is_float(const char *val, int len)
+{
+	float dummy;
+	return spa_json_parse_float(val, len, &dummy);
+}
+static inline int spa_json_get_float(struct spa_json *iter, float *res)
+{
+	const char *value;
+	int len;
+	if ((len = spa_json_next(iter, &value)) <= 0)
+		return -1;
+	return spa_json_parse_float(value, len, res);
+}
+
+static inline char *spa_json_format_float(char *str, int size, float val)
+{
+	if (SPA_UNLIKELY(!isnormal(val))) {
+		if (val == INFINITY)
+			val = FLT_MAX;
+		else if (val == -INFINITY)
+			val = FLT_MIN;
+		else
+			val = 0.0f;
+	}
+	return spa_dtoa(str, size, val);
+}
+
+/* int */
+static inline int spa_json_parse_int(const char *val, int len, int *result)
+{
+	char *end;
+	*result = strtol(val, &end, 0);
+	return len > 0 && end == val + len;
+}
+static inline bool spa_json_is_int(const char *val, int len)
+{
+	int dummy;
+	return spa_json_parse_int(val, len, &dummy);
+}
+static inline int spa_json_get_int(struct spa_json *iter, int *res)
+{
+	const char *value;
+	int len;
+	if ((len = spa_json_next(iter, &value)) <= 0)
+		return -1;
+	return spa_json_parse_int(value, len, res);
+}
+
+/* bool */
+static inline bool spa_json_is_true(const char *val, int len)
+{
+	return len == 4 && strncmp(val, "true", 4) == 0;
+}
+
+static inline bool spa_json_is_false(const char *val, int len)
+{
+	return len == 5 && strncmp(val, "false", 5) == 0;
+}
+
+static inline bool spa_json_is_bool(const char *val, int len)
+{
+	return spa_json_is_true(val, len) || spa_json_is_false(val, len);
+}
+
+static inline int spa_json_parse_bool(const char *val, int len, bool *result)
+{
+	if ((*result = spa_json_is_true(val, len)))
+		return 1;
+	if (!(*result = !spa_json_is_false(val, len)))
+		return 1;
+	return -1;
+}
+static inline int spa_json_get_bool(struct spa_json *iter, bool *res)
+{
+	const char *value;
+	int len;
+	if ((len = spa_json_next(iter, &value)) <= 0)
+		return -1;
+	return spa_json_parse_bool(value, len, res);
+}
+
+/* string */
+static inline bool spa_json_is_string(const char *val, int len)
+{
+	return len > 1 && *val == '"';
+}
+
+static inline int spa_json_parse_hex(const char *p, int num, uint32_t *res)
+{
+	int i;
+	*res = 0;
+	for (i = 0; i < num; i++) {
+		char v = p[i];
+		if (v >= '0' && v <= '9')
+			v = v - '0';
+		else if (v >= 'a' && v <= 'f')
+			v = v - 'a' + 10;
+		else if (v >= 'A' && v <= 'F')
+			v = v - 'A' + 10;
+		else
+			return -1;
+		*res = (*res << 4) | v;
+	}
+	return 1;
+}
+
+static inline int spa_json_parse_stringn(const char *val, int len, char *result, int maxlen)
+{
+	const char *p;
+	if (maxlen <= len)
+		return -1;
+	if (!spa_json_is_string(val, len)) {
+		if (result != val)
+			strncpy(result, val, len);
+		result += len;
+	} else {
+		for (p = val+1; p < val + len; p++) {
+			if (*p == '\\') {
+				p++;
+				if (*p == 'n')
+					*result++ = '\n';
+				else if (*p == 'r')
+					*result++ = '\r';
+				else if (*p == 'b')
+					*result++ = '\b';
+				else if (*p == 't')
+					*result++ = '\t';
+				else if (*p == 'f')
+					*result++ = '\f';
+				else if (*p == 'u') {
+					uint8_t prefix[] = { 0, 0xc0, 0xe0, 0xf0 };
+					uint32_t idx, n, v, cp, enc[] = { 0x80, 0x800, 0x10000 };
+					if (val + len - p < 5 ||
+					    spa_json_parse_hex(p+1, 4, &cp) < 0) {
+						*result++ = *p;
+						continue;
+					}
+					p += 4;
+
+					if (cp >= 0xd800 && cp <= 0xdbff) {
+						if (val + len - p < 7 ||
+						    p[1] != '\\' || p[2] != 'u' ||
+						    spa_json_parse_hex(p+3, 4, &v) < 0 ||
+						    v < 0xdc00 || v > 0xdfff)
+							continue;
+						p += 6;
+						cp = 0x010000 | ((cp & 0x3ff) << 10) | (v & 0x3ff);
+					} else if (cp >= 0xdc00 && cp <= 0xdfff)
+						continue;
+
+					for (idx = 0; idx < 3; idx++)
+						if (cp < enc[idx])
+							break;
+					for (n = idx; n > 0; n--, cp >>= 6)
+						result[n] = (cp | 0x80) & 0xbf;
+					*result++ = (cp | prefix[idx]) & 0xff;
+					result += idx;
+				} else
+					*result++ = *p;
+			} else if (*p == '\"') {
+				break;
+			} else
+				*result++ = *p;
+		}
+	}
+	*result = '\0';
+	return 1;
+}
+
+static inline int spa_json_parse_string(const char *val, int len, char *result)
+{
+	return spa_json_parse_stringn(val, len, result, len+1);
+}
+
+static inline int spa_json_get_string(struct spa_json *iter, char *res, int maxlen)
+{
+	const char *value;
+	int len;
+	if ((len = spa_json_next(iter, &value)) <= 0)
+		return -1;
+	return spa_json_parse_stringn(value, len, res, maxlen);
+}
+
+static inline int spa_json_encode_string(char *str, int size, const char *val)
+{
+	int len = 0;
+	static const char hex[] = { "0123456789abcdef" };
+#define __PUT(c) { if (len < size) *str++ = c; len++; }
+	__PUT('"');
+	while (*val) {
+		switch (*val) {
+		case '\n':
+			__PUT('\\'); __PUT('n');
+			break;
+		case '\r':
+			__PUT('\\'); __PUT('r');
+			break;
+		case '\b':
+			__PUT('\\'); __PUT('b');
+			break;
+		case '\t':
+			__PUT('\\'); __PUT('t');
+			break;
+		case '\f':
+			__PUT('\\'); __PUT('f');
+			break;
+		case '\\':
+		case '"':
+			__PUT('\\'); __PUT(*val);
+			break;
+		default:
+			if (*val > 0 && *val < 0x20) {
+				__PUT('\\'); __PUT('u');
+				__PUT('0'); __PUT('0');
+				__PUT(hex[((*val)>>4)&0xf]); __PUT(hex[(*val)&0xf]);
+			} else {
+				__PUT(*val);
+			}
+			break;
+		}
+		val++;
+	}
+	__PUT('"');
+	__PUT('\0');
+#undef __PUT
+	return len-1;
+}
+
+/**
+ * \}
+ */
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* SPA_UTILS_JSON_H */