[C] Function addition and modification of major structs (#1020)

* added readme file

* fixed parameters in api headers functions

* made changes to add readme file and typemapping of array to list

* fixed header import statement in apiheader files

* modified struct of model type in model header

* updated sample

* modified README file

* updated sample

* parse from json function added

* modified struct and create function

* added include for model

* modified parsefromjson function

* modified struct and create function for more datatypes

* added mapping for date-time and modified model import return statement

* modified function parameters

* modified include statement

* fix function in api body

* updated sample

Author: zhemant

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CLibcurlClientCodegen.java

@@ -144,7 +144,9 @@ public CLibcurlClientCodegen() {
         typeMapping.put("binary", "char");
         typeMapping.put("ByteArray", "char");
         typeMapping.put("UUID", "char");
-
+        typeMapping.put("array", "list");
+        typeMapping.put("date-time", "char");
+        
         // remove modelPackage and apiPackage added by default
         Iterator<CliOption> itr = cliOptions.iterator();
         while (itr.hasNext()) {
@@ -179,6 +181,7 @@ public void processOpts() {
         supportingFiles.add(new SupportingFile("CMakeLists.txt.mustache", "", "CMakeLists.txt"));
         supportingFiles.add(new SupportingFile("libcurl.licence.mustache", "", "libcurl.licence"));
         supportingFiles.add(new SupportingFile("uncrustify-rules.cfg.mustache", "", "uncrustify-rules.cfg"));
+        supportingFiles.add(new SupportingFile("README.md.mustache", "", "README.md"));
         // src folder
         supportingFiles.add(new SupportingFile("apiClient.c.mustache", "src", "apiClient.c"));
         supportingFiles.add(new SupportingFile("apiKey.c.mustache", "src", "apiKey.c"));
@@ -485,6 +488,11 @@ public String toOperationId(String operationId) {
     public String toApiImport(String name) {
         return apiPackage() + "/" + toApiFilename(name);
     }
+    
+    @Override
+    public String toModelImport(String name) {
+        return "#include \"" + name + ".h\"";
+    }
 
     @Override
     public void setParameterExampleValue(CodegenParameter p) {

modules/openapi-generator/src/main/resources/C-libcurl/CMakeLists.txt.mustache

@@ -11,6 +11,7 @@ set(ALL_SRC_LIST ${SRC_C} ${UNIT_TESTS_C} ${MODEL_C} ${API_C})
 include(CTest)
 include_directories(include)
 include_directories(external/include)
+include_directories(model)
 
 find_program(VALGRIND valgrind)
 if(VALGRIND)

modules/openapi-generator/src/main/resources/C-libcurl/README.md.mustache

@@ -0,0 +1,35 @@
+# C API client for {{{projectName}}}
+
+## Overview
+This API client was generated by the [OpenAPI Generator](https://openapi-generator.tech) project. By using the [OpenAPI spec](https://openapis.org) from a remote server, you can easily generate an API client.
+
+- API version: {{appVersion}}
+- Package version: {{packageVersion}}
+{{^hideGenerationTimestamp}}
+- Build date: {{generatedDate}}
+{{/hideGenerationTimestamp}}
+- Build package: {{generatorClass}}
+{{#infoUrl}}
+For more information, please visit [{{{infoUrl}}}]({{{infoUrl}}})
+{{/infoUrl}}
+
+## Installation
+You'll need the `curl 7.61` package in order to build the API.
+
+### Prerequisites
+Install the `curl 7.61` package with the following command on Linux.
+```C
+sudo apt remove curl
+wget http://curl.haxx.se/download/curl-7.60.0.tar.gz
+tar -xvf curl-7.61.0.tar.gz
+cd curl-7.61.0/
+./configure
+make
+sudo make install
+```
+
+
+## Author
+
+{{#apiInfo}}{{#apis}}{{^hasMore}}{{infoEmail}}
+{{/hasMore}}{{/apis}}{{/apiInfo}}

modules/openapi-generator/src/main/resources/C-libcurl/api-body.mustache

@@ -2,8 +2,7 @@
 #include <stdio.h>
 #include "apiClient.h"
 #include "cJSON.h"
-{{#imports}}
-#include "{{{import}}}.h" // TODO will fix the import later
+{{#imports}}{{{import}}}
 {{/imports}}
 
 #define MAX_BUFFER_LENGTH 4096
@@ -23,7 +22,7 @@
 // {{{notes}}}
 //
 {{/notes}}
-{{#returnType}}{{{.}}}_t{{/returnType}}{{^returnType}}void{{/returnType}} *{{{classname}}}_{{{operationId}}}(apiClient_t *apiClient{{#allParams}}, {{{dataType}}} {{paramName}}{{/allParams}}) {
+{{#returnType}}{{{.}}}_t{{/returnType}}{{^returnType}}void{{/returnType}} *{{{classname}}}_{{{operationId}}}(apiClient_t *apiClient{{#allParams}}, {{{dataType}}}{{#isListContainer}}_t*{{/isListContainer}}{{^isListContainer}}{{#isPrimitiveType}}{{#isString}}*{{/isString}}{{/isPrimitiveType}}{{^isPrimitiveType}}_t*{{/isPrimitiveType}}{{/isListContainer}} {{paramName}}{{/allParams}}) {
     list_t    *localVarQueryParameters,
     list_t    *localVarHeaderParameters,
     list_t    *localVarFormParameters,
@@ -89,7 +88,7 @@
    {{/bodyParam}}
    {{#bodyParam}}
     free(localVarBodyParameters);
-   cJSON_Delete()
+   cJSON_Delete({{{paramName}}}JSONObject);
    {{/bodyParam}}
    {{/allParams}}
     {{#returnType}}

modules/openapi-generator/src/main/resources/C-libcurl/api-header.mustache

@@ -2,10 +2,10 @@
 #include <stdio.h>
 #include "apiClient.h"
 #include "cJSON.h"
-{{#imports}}
-#include "{{{import}}}.h" // TODO will fix the import later
+{{#imports}}{{{import}}}
 {{/imports}}
 
+
 {{#operations}}
 {{#operation}}
 {{#summary}}
@@ -16,10 +16,7 @@
 // {{{notes}}}
 //
 {{/notes}}
-{{#returnType}}{{{.}}}_t{{/returnType}}{{^returnType}}void{{/returnType}} *{{{classname}}}_{{{operationId}}}(apiClient_t *apiClient{{#allParams}}, {{{dataType}}} {{paramName}}{{/allParams}}) 
-
-
-
+{{#returnType}}{{{.}}}_t{{/returnType}}{{^returnType}}void{{/returnType}} *{{{classname}}}_{{{operationId}}}(apiClient_t *apiClient{{#allParams}},{{{dataType}}}{{#isListContainer}}_t*{{/isListContainer}}{{^isListContainer}}{{#isPrimitiveType}}{{#isString}}*{{/isString}}{{/isPrimitiveType}}{{^isPrimitiveType}}_t*{{/isPrimitiveType}}{{/isListContainer}} {{paramName}}{{/allParams}}); 
 
 {{/operation}}
 {{/operations}}

modules/openapi-generator/src/main/resources/C-libcurl/apiClient.c.mustache

@@ -2,8 +2,8 @@
 #include <stdlib.h>
 #include <string.h>
 #include "apiClient.h"
-#include "apiKey.h"
-#include "model/pet.h" //TODO: Manual Path check if its ok
+#include "keyValuePair.h"
+#include "pet.h" //TODO: Manual Path check if its ok
 
 size_t writeDataCallback(void *buffer, size_t size, size_t nmemb, void *userp);