396 lines
10 KiB
C
396 lines
10 KiB
C
#define _XOPEN_SOURCE 700
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#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <limits.h>
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#include <option.h>
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/*
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* Takes a string of the form 64, 8m, 128k, 4g, etc. and converts to bytes.
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*/
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int64_t string_to_bytes(char *size_str)
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{
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int64_t size = 0;
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char range;
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int rc;
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rc = sscanf(size_str, " %lld %c ", (long long*) & size, &range);
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if (rc == 2) {
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switch ((int)range) {
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case 'k':
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case 'K':
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size <<= 10;
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break;
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case 'm':
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case 'M':
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size <<= 20;
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break;
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case 'g':
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case 'G':
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size <<= 30;
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break;
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case 't':
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case 'T':
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size <<= 40;
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break;
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case 'p':
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case 'P':
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size <<= 50;
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break;
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}
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} else if (rc == 0) {
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size = -1;
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}
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return (size);
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}
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/*
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* Initial revision by JK
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*/
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static int print_value(option_help * o){
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int pos = 0;
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if (o->arg == OPTION_OPTIONAL_ARGUMENT || o->arg == OPTION_REQUIRED_ARGUMENT){
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assert(o->variable != NULL);
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switch(o->type){
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case('p'):{
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pos += printf("=STRING");
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break;
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}
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case('F'):{
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pos += printf("=%.14f ", *(double*) o->variable);
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break;
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}
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case('f'):{
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pos += printf("=%.6f ", (double) *(float*) o->variable);
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break;
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}
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case('d'):{
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pos += printf("=%d ", *(int*) o->variable);
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break;
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}
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case('H'):
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case('s'):{
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if ( *(char**) o->variable != NULL && ((char**) o->variable)[0][0] != 0 ){
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pos += printf("=%s", *(char**) o->variable);
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}else{
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pos += printf("=STRING");
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}
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break;
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}
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case('c'):{
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pos += printf("=%c", *(char*) o->variable);
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break;
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}
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case('l'):{
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pos += printf("=%lld", *(long long*) o->variable);
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break;
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}
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}
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}
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if (o->arg == OPTION_FLAG && (*(int*)o->variable) != 0){
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pos += printf(" (%d)", (*(int*)o->variable));
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}
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return pos;
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}
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static void print_help_section(option_help * args, option_value_type type, char * name){
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int first;
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first = 1;
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option_help * o;
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for(o = args; o->shortVar != 0 || o->longVar != 0 || o->help != NULL ; o++){
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if (o->arg == type){
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if( o->shortVar == 0 && o->longVar == 0 && o->help != NULL){
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printf("%s\n", o->help);
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continue;
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}
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if (first){
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printf("\n%s\n", name);
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first = 0;
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}
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printf(" ");
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int pos = 0;
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if(o->shortVar != 0 && o->longVar != 0){
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pos += printf("-%c, --%s", o->shortVar, o->longVar);
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}else if(o->shortVar != 0){
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pos += printf("-%c", o->shortVar);
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}else if(o->longVar != 0){
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pos += printf("--%s", o->longVar);
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}
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pos += print_value(o);
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if(o->help != NULL){
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for(int i = 0 ; i < (30 - pos); i++){
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printf(" ");
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}
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printf("%s", o->help);
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}
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printf("\n");
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}
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}
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}
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void option_print_help(option_help * args, int is_plugin){
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option_help * o;
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int optionalArgs = 0;
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for(o = args; o->shortVar != 0 || o->longVar != 0 ; o++){
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if(o->arg != OPTION_REQUIRED_ARGUMENT){
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optionalArgs = 1;
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}
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switch(o->arg){
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case (OPTION_OPTIONAL_ARGUMENT):
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case (OPTION_FLAG):{
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if(o->shortVar != 0){
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printf("[-%c] ", o->shortVar);
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}else if(o->longVar != 0){
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printf("[--%s] ", o->longVar);
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}
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break;
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}case (OPTION_REQUIRED_ARGUMENT):{
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if(o->shortVar != 0){
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printf("-%c ", o->shortVar);
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}else if(o->longVar != 0){
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printf("--%s ", o->longVar);
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}
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break;
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}
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}
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}
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if (optionalArgs){
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//printf(" [Optional Args]");
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}
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if (! is_plugin){
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printf(" -- <Plugin options, see below>\n");
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}
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print_help_section(args, OPTION_REQUIRED_ARGUMENT, "Required arguments");
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print_help_section(args, OPTION_FLAG, "Flags");
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print_help_section(args, OPTION_OPTIONAL_ARGUMENT, "Optional arguments");
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}
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static int print_option_value(option_help * o){
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int pos = 0;
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if (o->arg == OPTION_OPTIONAL_ARGUMENT || o->arg == OPTION_REQUIRED_ARGUMENT){
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assert(o->variable != NULL);
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switch(o->type){
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case('F'):{
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pos += printf("=%.14f ", *(double*) o->variable);
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break;
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}
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case('f'):{
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pos += printf("=%.6f ", (double) *(float*) o->variable);
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break;
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}
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case('d'):{
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pos += printf("=%d ", *(int*) o->variable);
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break;
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}
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case('H'):{
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pos += printf("=HIDDEN");
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break;
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}
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case('s'):{
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if ( *(char**) o->variable != NULL && ((char**) o->variable)[0][0] != 0 ){
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pos += printf("=%s", *(char**) o->variable);
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}else{
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pos += printf("=");
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}
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break;
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}
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case('c'):{
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pos += printf("=%c", *(char*) o->variable);
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break;
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}
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case('l'):{
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pos += printf("=%lld", *(long long*) o->variable);
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break;
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}
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}
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}else{
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//printf(" ");
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}
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return pos;
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}
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static void print_current_option_section(option_help * args, option_value_type type){
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option_help * o;
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for(o = args; o->shortVar != 0 || o->longVar != 0 ; o++){
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if (o->arg == type){
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int pos = 0;
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if (o->arg == OPTION_FLAG && (*(int*)o->variable) == 0){
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continue;
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}
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printf("\t");
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if(o->shortVar != 0 && o->longVar != 0){
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pos += printf("%s", o->longVar);
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}else if(o->shortVar != 0){
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pos += printf("%c", o->shortVar);
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}else if(o->longVar != 0){
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pos += printf("%s", o->longVar);
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}
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pos += print_option_value(o);
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printf("\n");
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}
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}
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}
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void option_print_current(option_help * args){
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print_current_option_section(args, OPTION_REQUIRED_ARGUMENT);
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print_current_option_section(args, OPTION_OPTIONAL_ARGUMENT);
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print_current_option_section(args, OPTION_FLAG);
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}
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int option_parse(int argc, char ** argv, option_help * args, int * printhelp){
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int error = 0;
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int requiredArgsSeen = 0;
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int requiredArgsNeeded = 0;
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int i;
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for(option_help * o = args; o->shortVar != 0 || o->longVar != 0 ; o++ ){
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if(o->arg == OPTION_REQUIRED_ARGUMENT){
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requiredArgsNeeded++;
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}
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}
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for(i=1; i < argc; i++){
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char * txt = argv[i];
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int foundOption = 0;
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char * arg = strstr(txt, "=");
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int replaced_equal = 0;
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if(arg != NULL){
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arg[0] = 0;
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arg++;
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replaced_equal = 1;
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}
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if(strcmp(txt, "--") == 0){
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// we found plugin options
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break;
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}
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// try to find matching option help
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for(option_help * o = args; o->shortVar != 0 || o->longVar != 0 || o->help != NULL ; o++ ){
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if( o->shortVar == 0 && o->longVar == 0 ){
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// section
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continue;
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}
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if ( (txt[0] == '-' && o->shortVar == txt[1]) || (strlen(txt) > 2 && txt[0] == '-' && txt[1] == '-' && o->longVar != NULL && strcmp(txt + 2, o->longVar) == 0)){
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foundOption = 1;
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// now process the option.
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switch(o->arg){
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case (OPTION_FLAG):{
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assert(o->type == 'd');
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(*(int*) o->variable)++;
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break;
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}
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case (OPTION_OPTIONAL_ARGUMENT):
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case (OPTION_REQUIRED_ARGUMENT):{
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// check if next is an argument
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if(arg == NULL){
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if(o->shortVar == txt[1] && txt[2] != 0){
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arg = & txt[2];
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}else{
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// simply take the next value as argument
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i++;
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arg = argv[i];
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}
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}
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if(arg == NULL){
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const char str[] = {o->shortVar, 0};
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printf("Error, argument missing for option %s\n", (o->longVar != NULL) ? o->longVar : str);
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exit(1);
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}
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switch(o->type){
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case('p'):{
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// call the function in the variable
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void(*fp)() = o->variable;
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fp(arg);
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break;
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}
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case('F'):{
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*(double*) o->variable = atof(arg);
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break;
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}
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case('f'):{
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*(float*) o->variable = atof(arg);
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break;
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}
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case('d'):{
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int64_t val = string_to_bytes(arg);
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if (val > INT_MAX || val < INT_MIN){
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printf("WARNING: parsing the number %s to integer, this produced an overflow!\n", arg);
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}
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*(int*) o->variable = val;
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break;
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}
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case('H'):
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case('s'):{
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(*(char **) o->variable) = strdup(arg);
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break;
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}
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case('c'):{
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(*(char *)o->variable) = arg[0];
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if(strlen(arg) > 1){
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printf("Error, ignoring remainder of string for option %c (%s).\n", o->shortVar, o->longVar);
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}
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break;
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}
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case('l'):{
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*(long long*) o->variable = string_to_bytes(arg);
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break;
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}
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default:
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printf("ERROR: Unknown option type %c\n", o->type);
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}
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}
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}
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if(replaced_equal){
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arg[-1] = '=';
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}
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if(o->arg == OPTION_REQUIRED_ARGUMENT){
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requiredArgsSeen++;
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}
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break;
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}
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}
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if (! foundOption){
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if(strcmp(txt, "-h") == 0 || strcmp(txt, "--help") == 0){
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*printhelp=1;
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}else{
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printf("Error invalid argument: %s\n", txt);
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error = 1;
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}
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}
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}
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if( requiredArgsSeen != requiredArgsNeeded ){
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printf("Error: Missing some required arguments\n\n");
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*printhelp = -1;
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}
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if(error != 0){
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printf("Invalid options\n");
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*printhelp = -1;
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}
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return i;
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}
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