json_split.c

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#include <options/options.h>
#include <string.h>
#include "../csm/csm_all.h"

int main(int argc, const char * argv[]) {
        sm_set_program_name(argv[0]);
        
        const char*input_filename;
        const char*output_pattern_op;
        
        struct option* ops = options_allocate(3);
        options_string(ops, "in", &input_filename, "stdin", "input file (JSON)");
        options_string(ops, "out", &output_pattern_op, "./ld_split^02d.json", "output pattern; printf() pattern, but write '^' instead of '%'");
        
        if(!options_parse_args(ops, argc, argv)) {
                fprintf(stderr, "%s : splits a JSON file into many files."
                        "\n\nOptions:\n", argv[0]);
                options_print_help(ops, stderr);
                return -1;
        }
        
        
        /* Substitute "$" with "%" */
        
        char output_pattern[256]; strcpy(output_pattern, output_pattern_op);
        char *f = output_pattern;
        while(*f) {
                if(*f=='^') *f='%';
                f++;
        }

        fputs(output_pattern, stderr);
        
        FILE * input_stream = open_file_for_reading(input_filename);

        int count = 0;
        
        JO jo;
        while( (jo = json_read_stream(input_stream)) ) {
                char filename[1000];
                sprintf(filename, output_pattern, count);
                if(!count) {
                        
                }
                
                sm_debug("Writing to file (%s) %s\n", output_pattern, filename);
                FILE * f = open_file_for_writing(filename);
                if(!f) return -1;
                fputs(json_object_to_json_string(jo), f);
                jo_free(jo);
                fclose(f);
                
                count++;
        }
        
        
        return 0;
}