[C] Funzione per stringhe

[Zorgatone]

Perchè questo programma mi crasha durante la lettura di una stringa da input?

/*
 * String_Client.c
 *
 *  Created on: 08/nov/2010.
 *      Author: zorgatone.
 */

#include <stdio.h>
#include <stdlib.h>
#include "String_Support.h"

int main (void) {

    string mia_stringa;

    fprintf(stdout, "Insert a string: ");
    get_string(stdin, &mia_stringa);
    if (mia_stringa == NULL) {
        fprintf(stderr, "Error in read_string.\n");
        exit(EXIT_FAILURE);
    }
    fprintf(stdout, "String is: %s", mia_stringa);

    return 0;

} 

/*
 * String_Support.h
 *
 *  Created on: 08/nov/2010.
 *      Author: zorgatone.
 */

#ifndef STRING_SUPPORT_H_
#define STRING_SUPPORT_H_

#ifdef __STDC_VERSION__

    #if __STDC_VERSION__ >= 199901L

        #define BOOL_H <stdbool.h>
        #define BOOL bool
        #define Bool bool

        #ifndef TRUE
            #define TRUE true
        #endif

        #ifndef FALSE
            #define FALSE false
        #endif

    #endif

#else

    #define BOOL_H "Bool_Type.h"

#endif

#ifndef null
    #define null NULL
#endif

#include "String_Type.h"
#include BOOL_H

void get_string(FILE *stream, string *var);

#endif /* STRING_SUPPORT_H_ */ 

/*
 * Bool_Type.h
 *
 *  Created on: 08/nov/2010
 *      Author: zorgatone
 */

#ifndef Bool_Type_H_
#define Bool_Type_H_

#define true TRUE
#define false FALSE
typedef enum bool {FALSE, TRUE} bool;
typedef bool BOOL;
typedef bool Bool;

#endif /* Bool_Type_H_ */ 

/*
 * String_Type.h
 *
 *  Created on: 08/nov/2010.
 *      Author: zorgatone.
 */

#ifndef STRING_TYPE_H_
#define STRING_TYPE_H_

typedef char *string;

#endif /* STRING_TYPE_H_ */ 

/*
 * Information_Hiding.h
 *
 *  Created on: 08/nov/2010
 *      Author: zorgatone
 */

#ifndef __Information_Hiding__
#define __Information_Hiding__

    #define __Information_Hiding__
    #define PUBLIC /* Public */
    #define PRIVATE static
    #define PRIVATE2 static inline
    #define PRIVATE3 inline

#endif /* INFORMATION_HIDING_H_ */ 

/*************************************
 * String_Support.c                  *
 *                                   *
 *  Created on: 08/nov/2010.         *
 *      Author: zorgatone.           *
 *************************************/
/*
 * Header files includes.
 *
 *************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "Information_Hiding.h"
#include "String_Support.h"

void get_string(FILE *stream, string *var)  {

    unsigned int i = 1;
    string temp = calloc(i++, sizeof(string));
    char c = getc(stream);

    if (temp == NULL) {
        *var = NULL;
        return;
    }

    while(c == ' ')
        c = getc(stream);
    do {
        temp = realloc(temp, i++ * sizeof(string));
        if (temp == NULL) {
                *var = NULL;
                return;
            }
        temp[i - 3] = c;
    } while((c = getc(stream)) && c != '\n' && c != '\r');
    temp[i - 2] = '/0';           /* Lo so la slesh è al contrario ma solo perchè sul forum diventa un punto interrogativo */

    strcpy(*var, temp);
    free(temp);

    return;

} 

Quest'ultimo invece è il makefile (ho usato Eclipse per il progetto):

################################################################################
# Automatically-generated file. Do not edit!
################################################################################

-include ../makefile.init

RM := rm -rf

# All of the sources participating in the build are defined here
-include sources.mk
-include subdir.mk
-include objects.mk

ifneq ($(MAKECMDGOALS),clean)
ifneq ($(strip $(C_DEPS)),)
-include $(C_DEPS)
endif
endif

-include ../makefile.defs

# Add inputs and outputs from these tool invocations to the build variables 

# All Target
all: My

# Tool invocations
My: $(OBJS) $(USER_OBJS)
    @echo 'Building target: $@'
    @echo 'Invoking: MacOS X C Linker'
    gcc  -o "My" $(OBJS) $(USER_OBJS) $(LIBS)
    @echo 'Finished building target: $@'
    @echo ' '

# Other Targets
clean:
    -$(RM) $(OBJS)$(C_DEPS)$(EXECUTABLES) My
    -@echo ' '

.PHONY: all clean dependents
.SECONDARY:

-include ../makefile.targets