1 files changed, 112 insertions, 0 deletions
diff --git a/libjsmn/example/jsondump.c b/libjsmn/example/jsondump.c
new file mode 100644
index 000000000000..3490bbf49900
--- /dev/null
+++ b/libjsmn/example/jsondump.c
@@ -0,0 +1,112 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "../jsmn.h"
+
+/*
+ * An example of reading JSON from stdin and printing its content to stdout.
+ * The output looks like YAML, but I'm not sure if it's really compatible.
+ */
+
+static int dump(const char *js, jsmntok_t *t, size_t count, int indent) {
+	int i, j, k;
+	if (count == 0) {
+		return 0;
+	}
+	if (t->type == JSMN_PRIMITIVE) {
+		printf("%.*s", t->end - t->start, js+t->start);
+		return 1;
+	} else if (t->type == JSMN_STRING) {
+		printf("'%.*s'", t->end - t->start, js+t->start);
+		return 1;
+	} else if (t->type == JSMN_OBJECT) {
+		printf("\n");
+		j = 0;
+		for (i = 0; i < t->size; i++) {
+			for (k = 0; k < indent; k++) printf("  ");
+			j += dump(js, t+1+j, count-j, indent+1);
+			printf(": ");
+			j += dump(js, t+1+j, count-j, indent+1);
+			printf("\n");
+		}
+		return j+1;
+	} else if (t->type == JSMN_ARRAY) {
+		j = 0;
+		printf("\n");
+		for (i = 0; i < t->size; i++) {
+			for (k = 0; k < indent-1; k++) printf("  ");
+			printf("   - ");
+			j += dump(js, t+1+j, count-j, indent+1);
+			printf("\n");
+		}
+		return j+1;
+	}
+	return 0;
+}
+
+int main() {
+	int r;
+	int eof_expected = 0;
+	char *js = NULL;
+	size_t jslen = 0;
+	char buf[BUFSIZ];
+
+	jsmn_parser p;
+	jsmntok_t *tok;
+	size_t tokcount = 2;
+
+	/* Prepare parser */
+	jsmn_init(&p);
+
+	/* Allocate some tokens as a start */
+	tok = malloc(sizeof(*tok) * tokcount);
+	if (tok == NULL) {
+		fprintf(stderr, "malloc(): errno=%d\n", errno);
+		return 3;
+	}
+
+	for (;;) {
+		/* Read another chunk */
+		r = fread(buf, 1, sizeof(buf), stdin);
+		if (r < 0) {
+			fprintf(stderr, "fread(): %d, errno=%d\n", r, errno);
+			return 1;
+		}
+		if (r == 0) {
+			if (eof_expected != 0) {
+				return 0;
+			} else {
+				fprintf(stderr, "fread(): unexpected EOF\n");
+				return 2;
+			}
+		}
+
+		js = realloc(js, jslen + r + 1);
+		if (js == NULL) {
+			fprintf(stderr, "realloc(): errno=%d\n", errno);
+			return 3;
+		}
+		strncpy(js + jslen, buf, r);
+		jslen = jslen + r;
+
+again:
+		r = jsmn_parse(&p, js, jslen, tok, tokcount);
+		if (r < 0) {
+			if (r == JSMN_ERROR_NOMEM) {
+				tokcount = tokcount * 2;
+				tok = realloc(tok, sizeof(*tok) * tokcount);
+				if (tok == NULL) {
+					fprintf(stderr, "realloc(): errno=%d\n", errno);
+					return 3;
+				}
+				goto again;
+			}
+		} else {
+			dump(js, tok, p.toknext, 0);
+			eof_expected = 1;
+		}
+	}
+
+	return 0;
+}