JR_OBJ

Macro
August 22, 2025

Table of Contents

`JR_OBJ`

Description

Read a JSON object using a custom field reader expression. The macro parses the object and invokes the provided code block for each key-value pair. If the key is not recognized or parsing fails, the value is skipped.

Parameters

Name	Direction	Description
`si`	in,out	Stream iterator to read from.

Usage example (from documentation)

  JR_OBJ(si, {
      JR_STR_KV(si, "name", obj.name);
      JR_INT_KV(si, "id", obj.id);
  });

Success

Entire object read or skipped successfully

Failure

Logs error and restores si on structural or read failure

Usage example (Cross-references)

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In rogrammer/MisraStdC/blob/master/Include/Misra/Parsers/JSON.h#L624 target=_blank>JSON.h:624:
do { \ if (!StrCmpZstr(&key, (k))) { \ JR_OBJ(si, reader); \ \ } while (0) MisraEnum.c:61:
i64 last_value = 0; JR_OBJ(json, { JR_STR_KV(json, "name", enum_name); JR_BOOL_KV(json, "to_from_str", to_from_str); MisraEnum.c:78:
EnumEntry e = {0}; JR_OBJ(json, { JR_STR_KV(json, "name", e.name); JR_INT_KV(json, "value", e.value); MisraDoc.c:43:
p.test_directories = VecInitT(p.test_directories); \ p.source_directories = VecInitT(p.source_directories); \ JR_OBJ(json, { \ JR_OBJ_KV(json, "project", { \ JR_STR_KV(json, "build_dir", p.build_dir); \ Read.Simple.c:68:
Str city = StrInit(); JR_OBJ(si, { JR_STR_KV(si, "name", name); JR_STR_KV(si, "city", city); Read.Simple.c:109:
u32 year = 0; JR_OBJ(si, { JR_INT_KV(si, "count", count); JR_FLT_KV(si, "score", score); Read.Simple.c:145:
bool visible = true; JR_OBJ(si, { JR_BOOL_KV(si, "enabled", enabled); JR_BOOL_KV(si, "visible", visible); Read.Simple.c:176:
person.name = StrInit(); JR_OBJ(si, { JR_INT_KV(si, "id", person.id); JR_STR_KV(si, "name", person.name); Read.Simple.c:229:
config.log_level = StrInit(); JR_OBJ(si, { JR_BOOL_KV(si, "debug_mode", config.debug_mode); JR_INT_KV(si, "timeout", config.timeout); Read.Simple.c:269:
Vec(Str) languages = VecInitWithDeepCopy(NULL, StrDeinit); JR_OBJ(si, { JR_ARR_KV(si, "languages", { Str lang = StrInit();Read.Simple.c:340:
}; JR_OBJ(si, { JR_OBJ_KV(si, "user", { JR_STR_KV(si, "name", data.user.name); Read.Simple.c:392:
product.tags = VecInitWithDeepCopyT(product.tags, NULL, StrDeinit); JR_OBJ(si, { JR_INT_KV(si, "id", product.id); JR_STR_KV(si, "name", product.name); Read.EdgeCases.c:58:
obj1.found_anything = false; // Start as true to test it gets properly handled style=color:#75715e> JR_OBJ(si1, { obj1.found_anything = true; // This should never execute for empty object style=color:#75715e> }); Read.EdgeCases.c:78:
obj2.found_anything = false; JR_OBJ(si2, { obj2.found_anything = true; }); if (!obj2.found_anything) { // Should still be true for empty object Read.EdgeCases.c:104:
Vec(i32) items = VecInit(); JR_OBJ(si1, { JR_ARR_KV(si1, "items", { i32 value = 0; Read.EdgeCases.c:125:
Vec(Str) data = VecInitWithDeepCopy(NULL, StrDeinit); JR_OBJ(si2, { JR_ARR_KV(si2, "data", { Str value = StrInit(); Read.EdgeCases.c:161:
} obj = {StrInit(), StrInit()}; JR_OBJ(si, { JR_STR_KV(si, "name", obj.name); JR_STR_KV(si, "description", obj.description); Read.EdgeCases.c:198:
} obj = {0}; JR_OBJ(si, { JR_INT_KV(si, "temp", obj.temp); JR_FLT_KV(si, "balance", obj.balance); Read.EdgeCases.c:243:
} obj = {0}; JR_OBJ(si, { JR_INT_KV(si, "big_int", obj.big_int); JR_FLT_KV(si, "big_float", obj.big_float); Read.EdgeCases.c:283:
} obj = {999, 999.0, true}; // Initialize with non-zero values style=color:#75715e> JR_OBJ(si, { JR_INT_KV(si, "int_zero", obj.int_zero); JR_FLT_KV(si, "float_zero", obj.float_zero); Read.EdgeCases.c:329:
} obj = {StrInit(), StrInit(), StrInit()}; JR_OBJ(si, { JR_STR_KV(si, "path", obj.path); JR_STR_KV(si, "message", obj.message); Read.EdgeCases.c:371:
} obj = {StrInit(), StrInit(), StrInit(), StrInit()}; JR_OBJ(si, { JR_STR_KV(si, "escaped", obj.escaped); JR_STR_KV(si, "backslash", obj.backslash); Read.EdgeCases.c:415:
} obj = {StrInit(), 0, false}; JR_OBJ(si, { JR_STR_KV(si, "name", obj.name); JR_INT_KV(si, "value", obj.value); Read.EdgeCases.c:459:
} obj = {false, false, false, false}; JR_OBJ(si, { JR_OBJ_KV(si, "outer", { obj.found_outer = true; }); JR_ARR_KV(si, "list", { Read.EdgeCases.c:503:
} obj = {0, VecInit()}; JR_OBJ(si, { JR_OBJ_KV( si, Read.EdgeCases.c:567:
} obj = {0}; JR_OBJ(si, { JR_INT_KV(si, "max_int", obj.max_int); JR_INT_KV(si, "min_int", obj.min_int); Read.EdgeCases.c:613:
} obj = {0}; JR_OBJ(si, { JR_FLT_KV(si, "tiny", obj.tiny); JR_FLT_KV(si, "huge", obj.huge); RoundTrip.c:118:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_INT_KV(si, "count", parsed.count); JR_FLT_KV(si, "temperature", parsed.temperature); RoundTrip.c:194:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_INT_KV(si, "big_int", parsed.big_int); JR_INT_KV(si, "negative_int", parsed.negative_int); RoundTrip.c:258:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_BOOL_KV(si, "flag1", parsed.flag1); JR_BOOL_KV(si, "flag2", parsed.flag2); RoundTrip.c:315:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_STR_KV(si, "empty", parsed.empty); JR_STR_KV(si, "simple", parsed.simple); RoundTrip.c:384:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_ARR_KV(si, "numbers", { i32 num = 0; RoundTrip.c:473:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_OBJ_KV(si, "user", { JR_INT_KV(si, "id", parsed_person.id); RoundTrip.c:569:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_OBJ_KV(si, "user", { JR_INT_KV(si, "id", parsed.user.id); RoundTrip.c:674:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_STR_KV(si, "empty_string", parsed_str); JR_ARR_KV(si, "empty_numbers", { RoundTrip.c:754:
StrIter si = StrIterFromStr(json); JR_OBJ(si, { JR_INT_KV(si, "max_int", parsed.max_int); JR_INT_KV(si, "min_int", parsed.min_int); Read.Nested.c:140:
} data = {0, StrInit(), false, 0.0}; JR_OBJ(si, { JR_INT_KV(si, "id", data.id); JR_STR_KV(si, "name", data.name); Read.Nested.c:200:
}; JR_OBJ(si, { JR_OBJ_KV(si, "user", { JR_INT_KV(si, "id", data.user.id); Read.Nested.c:271:
}; JR_OBJ(si, { JR_OBJ_KV(si, "company", { JR_OBJ_KV(si, "departments", { Read.Nested.c:338:
Symbols symbols = VecInitWithDeepCopy(NULL, AnnSymbolDeinit); JR_OBJ(si, { JR_OBJ_KV(si, "functions", { // First level: source function ID from key Read.Nested.c:342:
// First level: source function ID from key style=color:#75715e> u64 source_function_id = strtoull(key.data, NULL, 10); JR_OBJ(si, { // Second level: target function ID from key style=color:#75715e> u64 target_function_id = strtoull(key.data, NULL, 10); Read.Nested.c:355:
sym.target_function_id = target_function_id; JR_OBJ(si, { JR_FLT_KV(si, "distance", sym.distance); JR_STR_KV(si, "name", sym.function_name); Read.Nested.c:438:
ApiResponse response = {false, StrInit(), VecInitWithDeepCopy(NULL, AnnSymbolDeinit)}; JR_OBJ(si, { JR_BOOL_KV(si, "status", response.status); JR_STR_KV(si, "message", response.message); Read.Nested.c:445:
JR_OBJ_KV(si, "data", { u64 source_function_id = strtoull(key.data, NULL, 10); JR_OBJ(si, { // Properly initialize all Str fields style=color:#75715e> AnnSymbol sym = {0}; Read.Nested.c:455:
sym.target_function_id = strtoull(key.data, NULL, 10); JR_OBJ(si, { JR_FLT_KV(si, "distance", sym.distance); JR_INT_KV(si, "nearest_neighbor_analysis_id", sym.analysis_id); Read.Nested.c:581:
info.name = StrInit(); JR_OBJ(si, { JR_INT_KV(si, "id", info.id); JR_STR_KV(si, "name", info.name); Read.Nested.c:628:
info.name = StrInit(); JR_OBJ(si, { JR_INT_KV(si, "id", info.id); JR_STR_KV(si, "name", info.name); Read.Nested.c:671:

    result.owned_by     = StrInit();

JR_OBJ(si, { JR_INT_KV(si, "binary_id", result.binary_id); JR_STR_KV(si, "binary_name", result.binary_name); Read.Nested.c:756:

    printf("[DEBUG] About to parse JSON...\n");

JR_OBJ(si, { JR_BOOL_KV(si, "status", response.status); JR_STR_KV(si, "message", response.message); Read.Nested.c:771:    u64 source_function_id = strtoull(key.data, NULL, 10); printf("[DEBUG] Source function ID from key: %llu\n", source_function_id); JR_OBJ(si, { // Properly initialize all Str fields style=color:#75715e>    AnnSymbol sym             = {0}; Read.Nested.c:783:    printf("[DEBUG] Target function ID from key: %llu\n", sym.target_function_id);

JR_OBJ(si, { JR_FLT_KV(si, "distance", sym.distance); JR_INT_KV(si, "nearest_neighbor_analysis_id", sym.analysis_id); Read.Nested.c:925:    printf("[DEBUG] About to parse JSON...\n");

JR_OBJ(si, { JR_BOOL_KV(si, "status", response.status); JR_STR_KV(si, "message", response.message); Read.Nested.c:940:    u64 source_function_id = strtoull(key.data, NULL, 10); printf("[DEBUG] Source function ID from key: %llu\n", source_function_id); JR_OBJ(si, { // Properly initialize all Str fields style=color:#75715e>    AnnSymbol sym             = {0}; Read.Nested.c:952:    printf("[DEBUG] Target function ID from key: %llu\n", sym.target_function_id);

JR_OBJ(si, { JR_FLT_KV(si, "distance", sym.distance); JR_INT_KV(si, "nearest_neighbor_analysis_id", sym.analysis_id);
Tags :
JSON
Macro
Reader
Object
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JR_OBJ

`JR_OBJ`

Description

Parameters

Usage example (from documentation)

Success

Failure

Usage example (Cross-references)

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`Related Posts`

`JR_STR_KV`

`JR_FLT`

`JR_INT`