Amalgamation

This tool merges c source files and headers to create the amalgamation.


void almagamate(const char* file_name_out, bool bHeaderMode, const char* files[], int count);

//Sample:

 chdir("../lib/");

    const char* files[] = {
         "file1.c",
         "file2.c",
    };

    almagamate("lib.c", /*bHeaderMode*/false, files, (sizeof(files) / sizeof(files[0])));

    const char* headers[] = {
        "Header1.h",
        "Header2.h",
    };


    almagamate("http.h",  /*bHeaderMode*/true, headers, (sizeof(headers) / sizeof(headers[0])));

When bHeaderMode is true only some regions are included.

For instance:

//My header file

#pragma once

..etc..

# //BEGIN_EXPORT
//only this part is included
# //END_EXPORT

For C source file the files are merged normaly (each header/source is included once)

Similar tools

https://github.com/svaarala/duktape/blob/master/tools/combine_src.py

https://github.com/vinniefalco/Amalgamate

/*
  ==============================================================================
  Copyright (c) 2020 by Thiago Adams

  This file is provided under the terms of the MIT License:
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.

  ==============================================================================
*/


#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <assert.h>

#if defined(_WIN32) || defined(__WIN32__) || defined(__WINDOWS__)
#define strdup _strdup
#define realpath(a,b) _fullpath(b, a, MAX_PATH)
#else
#include <unistd.h>
#endif 

int strcicmp(char const* a, char const* b)
{
    for (;; a++, b++) {
        int d = tolower((unsigned char)*a) - tolower((unsigned char)*b);
        if (d != 0 || !*a)
            return d;
    }
}


struct strlist_node
{
    char* fileName;
    struct strlist_node* pNext;
};

struct strlist
{
    struct strlist_node* head;
};


void strlist_append(const char* filename, struct strlist_node** s_included)
{

    struct strlist_node* pNew = malloc(sizeof * pNew);
    pNew->fileName = strdup(filename);
    pNew->pNext = 0;

    if (*s_included == NULL)
    {
        *s_included = pNew;
    }
    else
    {
        pNew->pNext = *s_included;
        *s_included = pNew;
    }
}


void mark_as_included(const char* filename0, struct strlist_node** s_included)
{
    char filename[200];
    realpath(filename0, filename);
    printf("filename %s \n", filename);
    strlist_append(filename, s_included);
}

bool strlist_has(const char* filename0, struct strlist_node** s_included)
{
    char filename[200];
    realpath(filename0, filename);

    bool result = false;
    struct strlist_node* pCurrent = *s_included;
    while (pCurrent)
    {
        if (strcicmp(pCurrent->fileName, filename) == 0)
        {
            result = true;
            break;
        }
        pCurrent = pCurrent->pNext;
    }
    return result;
}

void strlist_free(struct strlist_node** s_included)
{
    struct strlist_node* pCurrent = *s_included;
    while (pCurrent)
    {
        struct strlist_node* pNext = pCurrent->pNext;
        free(pCurrent->fileName);
        free(pCurrent);
        pCurrent = pNext;
    }

}

int str_ends_with(const char* str, const char* suffix)
{
    if (!str || !suffix)
        return 0;
    size_t lenstr = strlen(str);
    size_t lensuffix = strlen(suffix);
    if (lensuffix > lenstr)
        return 0;
    return strcicmp(str + lenstr - lensuffix, suffix) == 0;
}

bool Write(const char* name, bool bHeaderMode, FILE* out, struct strlist_node** s_included)
{

    bool cppfile = str_ends_with(name, ".c");

    fputs("\n", out);
    bool found = false;

    assert(!strlist_has(name, s_included));
    mark_as_included(name, s_included);

    struct strlist_node* defineList = 0;


    char previous = '\0';

    FILE* input = fopen(name, "r");

    if (input == 0)
    {
        //char name2[200];
        //snprintf(name2, 200, "./openssl/Lib141s/Include/%s", name);
        //input = fopen(name2, "r");
    }

    if (input)
    {
        found = true;
        char c = '\0';

        bool bInclude = bHeaderMode ? false : true;

        while (!feof(input))
        {
            previous = c;
            c = fgetc(input);
            if ((previous == '\0' || previous == '\n') && c == '#')
            {
                c = fgetc(input);
                char linebuffer[500];
                int i = 0;
                linebuffer[i] = '#';
                i++;
                while (c != '\n' && c != EOF)
                {
                    linebuffer[i] = c;
                    c = fgetc(input);
                    i++;
                }
                linebuffer[i] = '\0';
                const char* pChar = linebuffer;

                pChar++; //skip #

                while (*pChar == ' ') //skip spaces
                    pChar++;

                if (strncmp(pChar, "//BEGIN_EXPORT", sizeof("//BEGIN_EXPORT") - 1) == 0)
                {
                    //fputs(linebuffer, out);
                    fputs("\n", out);
                    if (bHeaderMode)
                    {
                        bInclude = true;
                    }
                }
                else if (strncmp(pChar, "//END_EXPORT", sizeof("//END_EXPORT") - 1) == 0)
                {
                    //fputs(linebuffer, out);
                    fputs("\n", out);
                    if (bHeaderMode)
                    {
                        bInclude = false;
                    }
                }
                else if (bInclude && strncmp(pChar, "define", sizeof("define") - 1) == 0)
                {



                    fputs(linebuffer, out);
                    fputs("\n", out);

                    if (cppfile)
                    {
                        //guardar todos defines feitos em ccpp e fazer undef
                        pChar += sizeof("define") - 1; //skip pragma

                        while (*pChar == ' ') //skip spaces
                            pChar++;

                        char defineName[200] = { 0 };
                        int k = 0;
                        while (*pChar != '\0' && *pChar != ' ' && *pChar != '(' && *pChar != '\n')
                        {
                            defineName[k] = *pChar;
                            k++;
                            pChar++;
                        }
                        strlist_append(defineName, &defineList);
                    }
                }
                else if (bInclude && strncmp(pChar, "pragma", sizeof("pragma") - 1) == 0)
                {
                    pChar += sizeof("pragma") - 1; //skip pragma

                    while (*pChar == ' ') //skip spaces
                        pChar++;

                    if (strncmp(pChar, "once", sizeof("once") - 1) == 0)
                    {
                        fputs("//", out);
                        fputs(linebuffer, out);
                        fputs("\n", out);
                    }
                    else
                    {
                        fputs(linebuffer, out);
                        fputs("\n", out);
                    }
                }
                else if (bInclude && strncmp(pChar, "include", sizeof("include") - 1) == 0)
                {
                    pChar += sizeof("include") - 1; //match include

                    while (*pChar == ' ') //skip spaces          
                        pChar++;

                    if (*pChar == '"' || *pChar == '<')
                    {
                        pChar++;//match " or <

                        char fileName[200] = { 0 };
                        int k = 0;
                        while (*pChar)
                        {
                            if (*pChar == '\"' || *pChar == '>')
                            {
                                break;
                            }
                            fileName[k] = *pChar;
                            pChar++;
                            k++;
                        }

                        if (!strlist_has(fileName, s_included))
                        {
                            fputs("\n", out);
                            if (!Write(fileName, bHeaderMode, out, s_included))
                            {
                                fputs(linebuffer, out);
                                fputs("\n", out);
                            }
                        }
                    }
                    else
                    {
                        fputs(linebuffer, out);
                        fputs("\n", out);
                    }
                }
                else
                {
                    if (bInclude)
                    {
                        fputs(linebuffer, out);
                        fputs("\n", out);
                    }
                }
            }
            else
            {
                if (c != EOF && bInclude)
                {
                    fputc(c, out);
                }
            }
        }

        fprintf(out, "\n");
        struct strlist_node* pCurrent = defineList;
        while (pCurrent)
        {
            struct strlist_node* pNext = pCurrent->pNext;
            fprintf(out, "#undef %s \n", pCurrent->fileName);


            free(pCurrent->fileName);
            free(pCurrent);
            pCurrent = pNext;
        }

        fclose(input);
    }


    return found;
}


void amalgamate(const char* file_name_out, bool bHeaderMode, const char* files[], int count)
{
    struct strlist_node* s_included = 0;


    FILE* out = fopen(file_name_out, "w");
    if (out)
    {
        for (int i = 0; i < count; i++)
        {

            if (!strlist_has(files[i], &s_included))
            {
                Write(files[i], bHeaderMode, out, &s_included);
            }

        }
        fclose(out);
    }

    strlist_free(&s_included);

}


int main()
{
    chdir("../lib/");

    const char* files[] = {
         "file1.c",
         "file2.c",
    };

    amalgamate("lib.c", /*bHeaderMode*/false, files, (sizeof(files) / sizeof(files[0])));

    const char* headers[] = {
        "Header1.h",
        "Header2.h",
    };


    amalgamate("http.h",  /*bHeaderMode*/true, headers, (sizeof(headers) / sizeof(headers[0])));
}