String.cpp

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// Copyright (c) 2013-2014 by Wayne C. Gramlich.  All rights reserved.

#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

#include "String.hpp"
#include "Memory.hpp"


String String__allocate(unsigned int size) {
    return (String)Memory__allocate(size + 1, "String__allocate");
}


bool String__equal(String_Const string1, String_Const string2) {
    return (bool)(strcmp(string1, string2) == 0);
}


String String__format(String_Const format, ...) {
    // Set up *variadic_arguments to start after *format*:
    va_list variadic_arguments;
    va_start(variadic_arguments, format);

    // Compute *formatted_size*:
    char buffer[2];
    unsigned int formatted_size = vsnprintf(buffer, 0, format, variadic_arguments);
    // Allocated *formatted*:
    String formatted =
      (String)Memory__allocate(formatted_size + 1, "String__format");

    // Format *formatted*:
    va_start(variadic_arguments, format);
    (void)vsnprintf(formatted, formatted_size + 1, format, variadic_arguments);

    return formatted;
}


void String__free(String_Const string) {
    Memory__free((Memory)string);
}


unsigned int String__size(String_Const string) {
    unsigned int size = 0;
    while (*string++ != '\0') {
        size += 1;
    }
    return size;
}



unsigned int String__to_unsigned(String_Const string) {
    unsigned int result  = 0;
    while (1) {
        char character = *string++;
        if (isdigit(character)) {
            result = result * 10 + (character - '0');
        } else {
            break;
        }
    }
    return result;
}