op_fileio.c

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#include <unistd.h>

#include "op_fileio.h"

#include "op_libiberty.h"

#include <errno.h>
#include <string.h>
#include <stdlib.h>

static FILE * op_do_open_file(char const * name, char const * mode, int fatal)
{
    FILE * fp;

    fp = fopen(name, mode);

    if (!fp) {
        if (fatal) {
            fprintf(stderr,"oprofiled:op_do_open_file: %s: %s",
                name, strerror(errno));
            exit(EXIT_FAILURE);
        }
    }

    return fp;
}


FILE * op_try_open_file(char const * name, char const * mode)
{
    return op_do_open_file(name, mode, 0);
}


FILE * op_open_file(char const * name, char const * mode)
{
    return op_do_open_file(name, mode, 1);
}


void op_close_file(FILE * fp)
{
    if (fclose(fp))
        perror("oprofiled:op_close_file: ");
}


void op_write_file(FILE * fp, void const * buf, size_t size)
{
    size_t written;

    if (size == 0)
        return;

    written = fwrite(buf, size, 1, fp);

    if (written != 1) {
        fprintf(stderr,
            "oprofiled:op_write_file: wrote less than expected: %lu bytes.\n",
            (unsigned long)size);
        exit(EXIT_FAILURE);
    }
}


void op_write_u8(FILE * fp, u8 val)
{
    op_write_file(fp, &val, sizeof(val));
}


void op_write_u32(FILE * fp, u32 val)
{
    op_write_file(fp, &val, sizeof(val));
}


void op_write_u64(FILE * fp, u64 val)
{
    op_write_file(fp, &val, sizeof(val));
}


u32 op_read_int_from_file(char const * filename, int fatal)
{
    FILE * fp;
    u32 value;

    fp = fopen(filename, "r");
    if (fp == NULL) {
        if (!fatal)
            return (u32)-1;
        fprintf(stderr,
            "op_read_int_from_file: Failed to open %s, reason %s\n",
            filename, strerror(errno));
        exit(EXIT_FAILURE);
    }

    if (fscanf(fp, "%u", &value) != 1) {
        fclose(fp);
        if (!fatal)
            return (u32)-1;
        fprintf(stderr,
            "op_read_int_from_file: Failed to convert contents of file %s to integer\n",
            filename);
        exit(EXIT_FAILURE);
    }

    fclose(fp);

    return value;
}


char * op_get_line(FILE * fp)
{
    char * buf;
    char * cp;
    int c;
    size_t max = 512;

    buf = xmalloc(max);
    cp = buf;

    while (1) {
        switch (c = getc(fp)) {
            case EOF:
                free(buf);
                return NULL;
                break;

            case '\n':
            case '\0':
                *cp = '\0';
                return buf;
                break;

            default:
                *cp = (char)c;
                cp++;
                if (((size_t)(cp - buf)) == max) {
                    buf = xrealloc(buf, max + 128);
                    cp = buf + max;
                    max += 128;
                }
                break;
        }
    }
}


/* FIXME the debug info stuff should be handled by binutils */
unsigned long
calc_crc32(unsigned long crc, unsigned char * buf, size_t len)
{
    static const unsigned long crc32_table[256] =
    {
        0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
        0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
        0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
        0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
        0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
        0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
        0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
        0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
        0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
        0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
        0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
        0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
        0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
        0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
        0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
        0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
        0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
        0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
        0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
        0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
        0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
        0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
        0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
        0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
        0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
        0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
        0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
        0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
        0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
        0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
        0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
        0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
        0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
        0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
        0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
        0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
        0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
        0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
        0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
        0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
        0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
        0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
        0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
        0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
        0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
        0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
        0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
        0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
        0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
        0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
        0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
        0x2d02ef8d
    };
    unsigned char * end;

    crc = ~crc & 0xffffffff;
    for (end = buf + len; buf < end; ++buf)
        crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
    return ~crc & 0xffffffff;
}