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Merge pull request #12795 from aabadie/pr/tests/pkg_jsmn_cleanup

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tests/pkg_jsmn: replace use of "%.*s" string formatter
This commit is contained in:
Marian Buschsieweke 2019-11-23 22:00:20 +01:00 committed by GitHub
commit ab94b7c8ad
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1 changed files with 23 additions and 14 deletions
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37
tests/pkg_jsmn/simple.c
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@ -29,12 +29,9 @@
#include <stdlib.h>
#include <string.h>
#include "kernel_defines.h" /* for ARRAY_SIZE macro */
#include "jsmn.h"
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(*a))
#endif
/*
* A small example of jsmn parsing when JSON structure is known and number of
* tokens is predictable.
@ -44,6 +41,8 @@ const char *JSON_STRING =
"{\"user\": \"johndoe\", \"admin\": false, \"uid\": 1000,\n "
"\"groups\": [\"users\", \"wheel\", \"audio\", \"video\"]}";
static char printbuf[32];
static int jsoneq(const char *json, jsmntok_t *tok, const char *s)
{
if (tok->type == JSMN_STRING && (int) strlen(s) == tok->end - tok->start &&
@ -53,6 +52,19 @@ static int jsoneq(const char *json, jsmntok_t *tok, const char *s)
return -1;
}
static inline size_t min(size_t a, size_t b)
{
return a <= b ? a : b;
}
static void print_string(char *prefix, const char *buf, size_t len)
{
len = min(len, sizeof(printbuf) - 1);
strncpy(printbuf, buf, len);
printbuf[len] = 0;
printf("%s%s\n", prefix, printbuf);
}
int main(void)
{
int i;
@ -77,20 +89,18 @@ int main(void)
for (i = 1; i < r; i++) {
if (jsoneq(JSON_STRING, &t[i], "user") == 0) {
/* We may use strndup() to fetch string value */
printf("- User: %.*s\n", t[i + 1].end - t[i + 1].start,
JSON_STRING + t[i + 1].start);
print_string("- User: ", JSON_STRING + t[i + 1].start, t[i + 1].end - t[i + 1].start);
i++;
}
else if (jsoneq(JSON_STRING, &t[i], "admin") == 0) {
/* We may additionally check if the value is either "true" or "false" */
printf("- Admin: %.*s\n", t[i + 1].end - t[i + 1].start,
JSON_STRING + t[i + 1].start);
/* We may additionally check if the value is either "true" or
"false" */
print_string("- Admin: ", JSON_STRING + t[i + 1].start, t[i + 1].end - t[i + 1].start);
i++;
}
else if (jsoneq(JSON_STRING, &t[i], "uid") == 0) {
/* We may want to do strtol() here to get numeric value */
printf("- UID: %.*s\n", t[i + 1].end - t[i + 1].start,
JSON_STRING + t[i + 1].start);
print_string("- UID: ", JSON_STRING + t[i + 1].start, t[i + 1].end - t[i + 1].start);
i++;
}
else if (jsoneq(JSON_STRING, &t[i], "groups") == 0) {
@ -101,13 +111,12 @@ int main(void)
}
for (j = 0; j < t[i + 1].size; j++) {
jsmntok_t *g = &t[i + j + 2];
printf(" * %.*s\n", g->end - g->start, JSON_STRING + g->start);
print_string(" * ", JSON_STRING + g->start, g->end - g->start);
}
i += t[i + 1].size + 1;
}
else {
printf("Unexpected key: %.*s\n", t[i].end - t[i].start,
JSON_STRING + t[i].start);
print_string("Unexpected key: ", JSON_STRING + t[i].start, t[i].end - t[i].start);
}
}
return 0;