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C splint调试分析错误_C_Splint - Fatal编程技术网

C splint调试分析错误

C splint调试分析错误,c,splint,C,Splint,这是我第一次使用splint(来自Ubuntu存储库),我立即被WTF击中。错误消息: nightcracker@nightcracker-pc:~/c/brainfuck$ splint brainfuck.c Splint 3.1.2 --- 03 May 2009 brainfuck.c:17:6: Parse Error. (For help on parse errors, see splint -help parseerrors.) *** Canno

这是我第一次使用splint(来自Ubuntu存储库),我立即被WTF击中。错误消息:

nightcracker@nightcracker-pc:~/c/brainfuck$ splint brainfuck.c
Splint 3.1.2 --- 03 May 2009

brainfuck.c:17:6: Parse Error. (For help on parse errors, see splint -help
               parseerrors.)
*** Cannot continue.
现在,很明显,它在第16行第6列看到了一些错误。让我们检查一下(发布完整代码):

#包括
#包括
#包括
枚举{
单元块大小=1024,
};
typedef无符号字符单元;
int main(int argc,char*argv[]){
如果(argc<1){
fprintf(stderr,“错误:参数不足\n”);
返回1;
}
FILE*srcfile;//源文件=bf&&ip 0 | |*ip!=']'){//跳到匹配]
if(*ip='[')nest++;//输入nest
如果(*ip=']')嵌套--;//离开嵌套(或主循环,其中嵌套>0失败)
ip++;//向右移动
}
}
打破
案例']':
如果(*cp){
ip--;//在结束括号之前移动
而(nest>0 | |*ip!='['){//倒带到匹配[
如果(*ip=='[')嵌套--;//离开嵌套(或主循环,其中嵌套>0失败)
if(*ip=']')nest++;//输入nest
ip--;//向左移动
}
ip--;//在开口支架之前移动
}
打破
}
ip++;//移动到下一条指令
}
游离(细胞);
自由(bf);
返回0;
}
请注意,此程序编译时没有错误(
gcc-Wall-std=c99 brainfuck.c
),运行时行为正常

注意:如果你被brainfuck这个名字冒犯了,就接受它。它是一种编程语言,作者以这种方式命名,我尊重并使用这个名字。

splint C99知道吗


尝试
/*…*/
而不是
/…
,并将声明移动到任何代码之前

调用splint时,也可以使用
+slashslashcomment
。在这种情况下:

splint+slashslashcomment.c

夹板手册:

p:-
slashslashcomment

使用//注释。ISO C99允许//注释,但更早 标准没有


(会将其放入注释中,但没有必要的代表)

天哪,我从来都不知道c99中引入了单行注释。我的编译器从未抱怨过,即使没有
-std=c99
。尽管很遗憾,这并不能解决我的问题。我在我的帖子中添加了另一个c99内容(与代码混合的声明也是新的)@nightcracker:相当多的编译器接受了
/
作为扩展,但直到C99它才正式成为语言的一部分。然后它被认为是一种不好的做法吗?我发现它更容易、更好,因为它不会阻止注释代码块。接受。移动声明起到了作用。我从不知道这一点他的:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

enum {
    CELL_CHUNK_SIZE = 1024,
};

typedef unsigned char cell;

int main(int argc, char *argv[]) {
    if (argc < 1) {
        fprintf(stderr, "ERROR: Not enough arguments\n");
        return 1;
    }

    FILE  *srcfile; // source file << THIS LINE APPARENTLY IS WRONG
    long srclen; // source file size
    char *bf; // brainfuck code file in memory

    char *ip; // instruction pointer
    cell *cells; // brainfuck cells
    cell *newcells; // used for creating a new chunk of cells
    cell *cp; // cell pointer
    unsigned long numcells = CELL_CHUNK_SIZE; // amount of current cells
    unsigned nest; // current nesting
    int buf; // i/o buffer

    srcfile = fopen(argv[1], "rb");
    if (srcfile == NULL) {
        fprintf(stderr, "ERROR: Couldn't open source file\n");
        return 2;
    }

    // get source file length
    fseek(srcfile, 0, SEEK_END);
    srclen = ftell(srcfile);
    fseek(srcfile, 0, SEEK_SET);

    // allocate memory for source file
    bf = malloc(srclen);
    if (bf == NULL) {
        fprintf(stderr, "ERROR: Couldn't allocate memory for source file\n");
        return 3;
    }

    // read source file in memory
    if (srclen != fread(bf, sizeof(char), srclen, srcfile)) {
        fprintf(stderr, "ERROR: Error while reading source file\n");
        free(bf);
        return 4;
    }

    fclose(srcfile);

    cells = malloc(CELL_CHUNK_SIZE * sizeof(cell));
    memset(cells, 0, CELL_CHUNK_SIZE);

    if (cells == NULL) {
        fprintf(stderr, "ERROR: Memory allocation failed\n");
        free(bf);
        free(cells);
        return 5;
    }

    cp = cells; // cell pointer initialized to most-left cell
    ip = bf; // instruction pointer initialized to first character
    nest = 0;

    while (ip >= bf && ip <= (bf + srclen)) {
        switch (*ip) {
            case '+':
                (*cp)++;
                break;
            case '-':
                (*cp)--;
                break;
            case '>':
                cp++;
                if ((cp - cells) == numcells) {
                    newcells = realloc(cells, (numcells + CELL_CHUNK_SIZE) * sizeof(cell)); // allocate memory for new chunk

                    if (newcells == NULL) {
                        fprintf(stderr, "ERROR: Memory allocation failed\n");
                        free(bf);
                        free(cells);
                        return 5;
                    }

                    cp = newcells + (cp - cells); // point cell pointer to cell in new chunk
                    cells = newcells; // point cells to new memory location (if altered)
                    memset(cp, 0, CELL_CHUNK_SIZE); // initialize new chunk
                    numcells += CELL_CHUNK_SIZE;
                }
                break;
            case '<':
                cp--;
                break;
            case '.':
                putchar(*cp);
                break;
            case ',':
                if ((buf = getchar()) != EOF) {
                    *cp = (unsigned char) buf;
                } else *cp = 0;
                break;
            case '[':
                if (!(*cp)) {
                    ip++; // move past the opening bracket
                    while (nest > 0 || *ip != ']') { // skip to matching ]
                        if (*ip == '[') nest++; // enter nest
                        if (*ip == ']') nest--; // leave nest (or main loop, in which nesting > 0 fails)

                        ip++; // move right
                    }

                }
                break;
            case ']':
                if (*cp) {
                    ip--; // move before the closing bracket
                    while (nest > 0 || *ip != '[') { // rewind to matching [
                        if (*ip == '[') nest--; // leave nest (or main loop, in which nesting > 0 fails)
                        if (*ip == ']') nest++; // enter nest

                        ip--; // move left
                    }
                    ip--; // move before the opening bracket
                }
                break;
        }

        ip++; // move to next instruction
    }


    free(cells);
    free(bf);
    return 0;
}