source: Daodan/src/inifile_reader.c@ 347

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

#include "inifile.h"

bool inifile_read(char* filename, inifile_callback callback)
{
        FILE* fp = fopen(filename, "r");
        char* inisection = "";
        char readbuf[4096] = "";
        char* readptr;
        bool success = true;
        bool newsection = false;
        
        if (!fp)
                return inifile_cantread;
        
        while ((readptr = fgets(readbuf, sizeof(readbuf), fp))) // Loop through each line.
        {
                while (isspace(readptr[0])) // Skip whitespace.
                        readptr++;
                
                if (readptr[0] == '\0' || readptr[0] == '#' || readptr[0] == '!') // Skip empty lines and comments.
                        continue;
                else if (readptr[0] == '[' && readptr[1] != ']') // It's a section header.
                {
                        int i;
                        for (i = 2; readptr[i]; i ++) // Look for the ]
                                if (readptr[i] == ']')
                                        break;
                        
                        if (readptr[i]) // Replace with a null or crash with error.
                                readptr[i] = '\0';
                        else
                        {
                                success = false;
                                break;
                        }
                        
                        if (inisection[0])
                                free(inisection);
                        inisection = strdup(readptr + 1);
                        newsection = true;
                }
                else // It's a value.
                {
                        int i;
                        int equals = 0;
                        for (i = 0; readptr[i]; i ++) // Find the =
                                if (readptr[i] == '=')
                                        equals = i;
                        
                        if (readptr[i - 1] == '\n')
                                readptr[i - 1] = '\0'; // Remove the trailing newline.
                        
                        if (equals) // If there's no equals, crash with error.
                        {
                                readptr[equals] = '\0';
                                if (!callback(inisection, newsection, readptr, readptr + equals + 1)) // If the callback is false, exit.
                                        break;
                                newsection = false;
                        }
                        else
                        {
                                success = false;
                                break;
                        }
                }
        }
        
        if (inisection[0])
                free(inisection);
        
        fclose(fp);
        return success;
}