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codegen looks good

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overflowerror 2021-05-03 19:08:46 +02:00
parent 46e6d00b57
commit e64d22b9d1
1 changed files with 125 additions and 10 deletions
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135
marshaller/src/codegen.c
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@ -3,25 +3,139 @@
#include <stdlib.h>
#include "codegen.h"
#include "helper.h"
struct declarsinfo* declarations;
extern int yyparse();
void generateCodeStruct(FILE* output, struct structinfo* info) {
fprintf(output, "Struct %s", info->names[0]);
if (info->names[1]) {
fprintf(output, ", %s", info->names[1]);
}
void generatePreamble(FILE* output) {
fprintf(output, "#include <stdlib.h>\n");
fprintf(output, "#include <stdbool.h>\n");
fprintf(output, "#include <errno.h>\n");
fprintf(output, "#include <alloc.h>\n");
fprintf(output, "\n");
fprintf(output, "#include <json.h>\n");
fprintf(output, "#include <marshall.h>\n");
fprintf(output, "\n");
fprintf(output, "extern void _marshallPanic(const char*, const char*);\n");
fprintf(output, "extern void _registerMarshaller(int, const char**, (jsonValue_t*)(*)(void*), (void*)(*)(jsonValue_t*));\n");
fprintf(output, "\n");
}
char* fixStructName(char* _name) {
char* name = strdup(_name);
if (name == NULL) {
panic("strdup");
}
for (size_t i = 0; name[i] != '\0'; i++) {
if (name[i] == ' ') {
name[i] = '_';
}
}
return name;
}
char* generateMarshallFunction(FILE* output, struct structinfo* info, char* suffix) {
#define MARSHALL_FUNCTION_PREFIX "_json_marshall_value_"
char* functionName = malloc(strlen(MARSHALL_FUNCTION_PREFIX) + strlen(suffix) + 1);
if (functionName == NULL) {
panic("malloc");
}
strcpy(functionName, MARSHALL_FUNCTION_PREFIX);
strcat(functionName, suffix);
fprintf(output, "static jsonValue_t* %s(%s* d) {\n", functionName, info->names[0]);
fprintf(output, "\tif (d == NULL)\n");
fprintf(output, "\t\treturn json_null();\n");
fprintf(output, "\tretuen json_object(true, %d\n", info->memberno);
for (size_t i = 0; i < info->memberno; i++) {
struct memberinfo* member = info->members[i];
fprintf(output, "\t\t\"%s\", ", member->name);
const char* reference = "";
if (!member->type->isPointer) {
reference = "&";
}
fprintf(output, "_json_marshall_value(\"%s\", %s(d->%s))%s\n", member->type->type, reference, member->name, i == info->memberno - 1 ? "," : "");
}
fprintf(output, "\t);\n");
fprintf(output, "}\n\n");
return functionName;
}
char* generateUnmarshallFunction(FILE* output, struct structinfo* info, char* suffix) {
#define UNMARSHALL_FUNCTION_PREFIX "_json_unmarshall_value_"
char* functionName = malloc(strlen(UNMARSHALL_FUNCTION_PREFIX) + strlen(suffix) + 1);
if (functionName == NULL) {
panic("malloc");
}
strcpy(functionName, UNMARSHALL_FUNCTION_PREFIX);
strcat(functionName, suffix);
fprintf(output, "static %s* %s(jsonValue_t* v) {\n", info->names[0], functionName);
fprintf(output, "\tif (v->type != JSON_OBJECT) {\n");
fprintf(output, "\t\terrno = EINVAL;\n");
fprintf(output, "\t\treturn NULL;\n");
fprintf(output, "\t}\n");
fprintf(output, "\t%s* d = malloc(sizeof(%s));\n", info->names[0], info->names[0]);
fprintf(output, "\tif (d == NULL)\n");
fprintf(output, "\t\treturn NULL;\n");
fprintf(output, "\tvoid* tmp;\n");
for (size_t i = 0; i < info->memberno; i++) {
fprintf(output, " Member %s (%s%s)\n",
info->members[i]->name,
info->members[i]->type->type,
info->members[i]->type->isPointer ? " pointer" : ""
);
struct memberinfo* member = info->members[i];
fprintf(output, "\ttmp = _json_unmarshall_value(\"%s\", json_object_get(v, \"%s\");\n", member->type->type, member->name);
if (member->type->isPointer) {
fprintf(output, "\td->%s = (%s*) tmp;\n", member->name, member->type->type);
} else {
fprintf(output, "\tif (tmp == NULL) {\n");
fprintf(output, "\t\terrno = EINVAL;\n");
fprintf(output, "\t\tfree(d);\n");
fprintf(output, "\t\treturn NULL;\n");
fprintf(output, "\t} else {\n");
fprintf(output, "\t\td->%s = *((%s*) tmp);\n", member->name, member->type->type);
fprintf(output, "\t\tfree(tmp);\n");
fprintf(output, "\t}\n");
}
}
fprintf(output, "\treturn d;\n");
fprintf(output, "}\n\n");
return functionName;
}
void generateCodeStruct(FILE* output, struct structinfo* info) {
char* suffix = fixStructName(info->names[0]);
char* marshall = generateMarshallFunction(output, info, suffix);
char* unmarshall = generateUnmarshallFunction(output, info, suffix);
fprintf(output, "__attribute__((constructor)) static void _register_marshaller_%s_() {\n", suffix);
int namesno = info->names[1] == 0 ? 1 : 2;
fprintf(output, "\tchar* tmp = alloca(sizeof(char*) * %d);\n", namesno);
fprintf(output, "\ttmp[0] = info->names[0];\n");
fprintf(output, "\ttmp[1] = info->names[1];\n");
fprintf(output, "\t_registerMarshaller(%d, tmp, &%s, &%s);\n", namesno, marshall, unmarshall);
fprintf(output, "}\n\n");
free(suffix);
free(marshall);
free(unmarshall);
}
void generateCode(FILE* output) {
@ -36,6 +150,7 @@ int main(void) {
return result;
}
generatePreamble(stdout);
generateCode(stdout);
return 0;