Mercurial > hg > xmms-sid
view src/xs_support.c @ 1003:084f4887c84b
Added signature for changeset ede5374e9294
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Sat, 28 Dec 2013 13:16:11 +0200 |
parents | 0233c5fd7d5e |
children | 0cd6bcc9ef80 |
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/* XMMS-SID - SIDPlay input plugin for X MultiMedia System (XMMS) Miscellaneous support functions Programmed and designed by Matti 'ccr' Hamalainen <ccr@tnsp.org> (C) Copyright 1999-2009 Tecnic Software productions (TNSP) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. -- Except for the MD5 related functionality at the end of this file. -- */ #include "xs_support.h" #ifndef __AUDACIOUS_NEWVFS__ #include <sys/types.h> #include <sys/stat.h> #endif gboolean xs_fread_str(XSFile *f, void *buf, const size_t len) { return xs_fread(buf, len, 1, f) == 1; } gboolean xs_fread_byte(XSFile *f, guint8 *val) { gint tmp = xs_fgetc(f); *val = tmp; return tmp != EOF; } /* Error messages */ void xs_error(const char *fmt, ...) { va_list ap; fprintf(stderr, "XMMS-SID: "); va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); } #ifndef DEBUG_NP void XSDEBUG(const char *fmt, ...) { #ifdef DEBUG va_list ap; fprintf(stderr, "XSDEBUG: "); va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); #else (void) fmt; #endif } #endif #ifndef __AUDACIOUS_NEWVFS__ off_t xs_fsize(XSFile *f) { off_t pos; if (fseeko(f, 0, SEEK_END) < 0) return -1; pos = ftello(f); if (fseeko(f, 0, SEEK_SET) < 0) return -1; return pos; } #endif gboolean xs_is_dir_path(const gchar *path) { #ifndef __AUDACIOUS_NEWVFS__ struct stat sb; if (stat(path, &sb) < 0) return FALSE; return (S_ISDIR(sb.st_mode)); #else // XXX #endif } gchar *xs_get_dir_path(const gchar *path) { #ifndef __AUDACIOUS_NEWVFS__ if (!xs_is_dir_path(path)) return g_dirname(path); else return g_strdup(path); #else // XXX #endif } gboolean xs_fread_be16(XSFile *f, guint16 *val) { guint16 result; if (xs_fread(&result, sizeof(result), 1, f) != 1) return FALSE; *val = GUINT16_FROM_BE(result); return TRUE; } gboolean xs_fread_be32(XSFile *f, guint32 *val) { guint32 result; if (xs_fread(&result, sizeof(result), 1, f) != 1) return FALSE; *val = GUINT32_FROM_BE(result); return TRUE; } /* Load a file to a buffer, return 0 on success, negative value on error */ gboolean xs_fload_buffer(const gchar *filename, guint8 **pbuf, size_t *bufSize, const size_t maxSize, gboolean failMaxSize) { XSFile *fp = NULL; size_t readSize = 0, fileSize = 0; gboolean res = FALSE; if (filename == NULL) return FALSE; if ((fp = xs_fopen(filename, "rb")) == NULL) { xs_error("Could not open '%s' for reading.\n", filename); goto error; } fileSize = xs_fsize(fp); if (failMaxSize && fileSize > maxSize) { xs_error("File '%s' size %d exceeds maxSize %d.\n", filename, fileSize, maxSize); goto error; } readSize = fileSize < maxSize ? fileSize : maxSize; if ((*pbuf = (guint8 *) g_malloc(readSize * sizeof(guint8))) == NULL) { xs_error("Could not allocate %d bytes for filebuffer '%s'.\n", readSize, filename); goto error; } *bufSize = xs_fread(*pbuf, sizeof(guint8), readSize, fp); res = (readSize == *bufSize); error: if (fp != NULL) xs_fclose(fp); if (!res) { xs_error("File '%s', expected %d bytes, read %d bytes.\n", filename, readSize, *bufSize); } return res; } gboolean xs_fload_buffer_path(const gchar *ppath, const gchar *pfilename, guint8 **pbuf, size_t *bufSize, const size_t maxSize, gboolean failMaxSize) { gchar *filename, *pseparator; gboolean res; if (pfilename == NULL) return FALSE; pseparator = ppath != NULL ? ((ppath[strlen(ppath)] != '/') ? "/" : "") : ""; filename = g_strdup_printf("%s%s%s", ppath, pseparator, pfilename); if (filename == NULL) return FALSE; res = xs_fload_buffer(filename, pbuf, bufSize, maxSize, failMaxSize); g_free(filename); return res; } /* * MD5 implementation, modified for XMMS-SID from * Colin Plumb's implementation by Matti 'ccr' Hämäläinen. * * This code implements the MD5 message-digest algorithm. * The algorithm is due to Ron Rivest. This code was * written by Colin Plumb in 1993, no copyright is claimed. * This code is in the public domain; do with it what you wish. */ #if G_BYTE_ORDER == G_LITTLE_ENDIAN # define xs_md5_bytereverse(buf, len) /* Nothing */ #elif G_BYTE_ORDER == G_BIG_ENDIAN static void xs_md5_bytereverse(guint8 *buf, guint l) { guint32 t; do { t = (guint32) ((guint) buf[3] << 8 | buf[2]) << 16 | ((guint) buf[1] << 8 | buf[0]); *(guint32 *) buf = t; buf += sizeof(guint32); } while (--l); } #else # error Unsupported endianess! #endif /* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious * initialization constants. */ void xs_md5_init(xs_md5state_t *ctx) { ctx->buf[0] = 0x67452301; ctx->buf[1] = 0xefcdab89; ctx->buf[2] = 0x98badcfe; ctx->buf[3] = 0x10325476; ctx->bits[0] = 0; ctx->bits[1] = 0; } /* The core of the MD5 algorithm, this alters an existing MD5 hash to * reflect the addition of 16 longwords of new data. xs_md5_update blocks * the data and converts bytes into longwords for this routine. */ #define F1(x, y, z) (z ^ (x & (y ^ z))) #define F2(x, y, z) F1(z, x, y) #define F3(x, y, z) (x ^ y ^ z) #define F4(x, y, z) (y ^ (x | ~z)) #define MD5STEP(f, w, x, y, z, data, s) ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) static void xs_md5_transform(guint32 buf[4], guint32 const in[16]) { register guint32 a, b, c, d; a = buf[0]; b = buf[1]; c = buf[2]; d = buf[3]; MD5STEP(F1, a, b, c, d, in[ 0] + 0xd76aa478, 7); MD5STEP(F1, d, a, b, c, in[ 1] + 0xe8c7b756, 12); MD5STEP(F1, c, d, a, b, in[ 2] + 0x242070db, 17); MD5STEP(F1, b, c, d, a, in[ 3] + 0xc1bdceee, 22); MD5STEP(F1, a, b, c, d, in[ 4] + 0xf57c0faf, 7); MD5STEP(F1, d, a, b, c, in[ 5] + 0x4787c62a, 12); MD5STEP(F1, c, d, a, b, in[ 6] + 0xa8304613, 17); MD5STEP(F1, b, c, d, a, in[ 7] + 0xfd469501, 22); MD5STEP(F1, a, b, c, d, in[ 8] + 0x698098d8, 7); MD5STEP(F1, d, a, b, c, in[ 9] + 0x8b44f7af, 12); MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); MD5STEP(F2, a, b, c, d, in[ 1] + 0xf61e2562, 5); MD5STEP(F2, d, a, b, c, in[ 6] + 0xc040b340, 9); MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); MD5STEP(F2, b, c, d, a, in[ 0] + 0xe9b6c7aa, 20); MD5STEP(F2, a, b, c, d, in[ 5] + 0xd62f105d, 5); MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); MD5STEP(F2, b, c, d, a, in[ 4] + 0xe7d3fbc8, 20); MD5STEP(F2, a, b, c, d, in[ 9] + 0x21e1cde6, 5); MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); MD5STEP(F2, c, d, a, b, in[ 3] + 0xf4d50d87, 14); MD5STEP(F2, b, c, d, a, in[ 8] + 0x455a14ed, 20); MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); MD5STEP(F2, d, a, b, c, in[ 2] + 0xfcefa3f8, 9); MD5STEP(F2, c, d, a, b, in[ 7] + 0x676f02d9, 14); MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); MD5STEP(F3, a, b, c, d, in[ 5] + 0xfffa3942, 4); MD5STEP(F3, d, a, b, c, in[ 8] + 0x8771f681, 11); MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); MD5STEP(F3, a, b, c, d, in[ 1] + 0xa4beea44, 4); MD5STEP(F3, d, a, b, c, in[ 4] + 0x4bdecfa9, 11); MD5STEP(F3, c, d, a, b, in[ 7] + 0xf6bb4b60, 16); MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); MD5STEP(F3, d, a, b, c, in[ 0] + 0xeaa127fa, 11); MD5STEP(F3, c, d, a, b, in[ 3] + 0xd4ef3085, 16); MD5STEP(F3, b, c, d, a, in[ 6] + 0x04881d05, 23); MD5STEP(F3, a, b, c, d, in[ 9] + 0xd9d4d039, 4); MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); MD5STEP(F3, b, c, d, a, in[ 2] + 0xc4ac5665, 23); MD5STEP(F4, a, b, c, d, in[ 0] + 0xf4292244, 6); MD5STEP(F4, d, a, b, c, in[ 7] + 0x432aff97, 10); MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); MD5STEP(F4, b, c, d, a, in[ 5] + 0xfc93a039, 21); MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); MD5STEP(F4, d, a, b, c, in[ 3] + 0x8f0ccc92, 10); MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); MD5STEP(F4, b, c, d, a, in[ 1] + 0x85845dd1, 21); MD5STEP(F4, a, b, c, d, in[ 8] + 0x6fa87e4f, 6); MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); MD5STEP(F4, c, d, a, b, in[ 6] + 0xa3014314, 15); MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); MD5STEP(F4, a, b, c, d, in[ 4] + 0xf7537e82, 6); MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); MD5STEP(F4, c, d, a, b, in[ 2] + 0x2ad7d2bb, 15); MD5STEP(F4, b, c, d, a, in[ 9] + 0xeb86d391, 21); buf[0] += a; buf[1] += b; buf[2] += c; buf[3] += d; } /* Update context to reflect the concatenation of another buffer full * of bytes. */ void xs_md5_append(xs_md5state_t *ctx, const guint8 *buf, guint len) { guint32 t; /* Update bitcount */ t = ctx->bits[0]; if ((ctx->bits[0] = t + ((guint32) len << 3)) < t) ctx->bits[1]++; /* Carry from low to high */ ctx->bits[1] += len >> 29; t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ /* Handle any leading odd-sized chunks */ if (t) { guint8 *p = (guint8 *) ctx->in + t; t = 64 - t; if (len < t) { memcpy(p, buf, len); return; } memcpy(p, buf, t); xs_md5_bytereverse(ctx->in, 16); xs_md5_transform(ctx->buf, (guint32 *) ctx->in); buf += t; len -= t; } /* Process data in 64-byte chunks */ while (len >= 64) { memcpy(ctx->in, buf, 64); xs_md5_bytereverse(ctx->in, 16); xs_md5_transform(ctx->buf, (guint32 *) ctx->in); buf += 64; len -= 64; } /* Handle any remaining bytes of data. */ memcpy(ctx->in, buf, len); } /* Final wrapup - pad to 64-byte boundary with the bit pattern * 1 0* (64-bit count of bits processed, MSB-first) */ void xs_md5_finish(xs_md5state_t *ctx, xs_md5hash_t digest) { guint count; guint8 *p; /* Compute number of bytes mod 64 */ count = (ctx->bits[0] >> 3) & 0x3F; /* Set the first char of padding to 0x80. This is safe since there is always at least one byte free */ p = ctx->in + count; *p++ = 0x80; /* Bytes of padding needed to make 64 bytes */ count = 64 - 1 - count; /* Pad out to 56 mod 64 */ if (count < 8) { /* Two lots of padding: Pad the first block to 64 bytes */ memset(p, 0, count); xs_md5_bytereverse(ctx->in, 16); xs_md5_transform(ctx->buf, (guint32 *) ctx->in); /* Now fill the next block with 56 bytes */ memset(ctx->in, 0, 56); } else { /* Pad block to 56 bytes */ memset(p, 0, count - 8); } xs_md5_bytereverse(ctx->in, 14); /* Append length in bits and transform */ memcpy(((guint32 *) ctx->in) + 14, &ctx->bits[0], sizeof(guint32)); memcpy(((guint32 *) ctx->in) + 15, &ctx->bits[1], sizeof(guint32)); xs_md5_transform(ctx->buf, (guint32 *) ctx->in); xs_md5_bytereverse((guint8 *) ctx->buf, 4); memcpy(digest, ctx->buf, 16); memset(ctx, 0, sizeof(*ctx)); } /* Copy a given string over in *result. */ gint xs_pstrcpy(gchar **result, const gchar *str) { /* Check the string pointers */ if (!result || !str) return -1; /* Allocate memory for destination */ g_free(*result); *result = (gchar *) g_malloc(strlen(str) + 1); if (!*result) return -2; /* Copy to the destination */ strcpy(*result, str); return 0; } /* Concatenates a given string into string pointed by *result. */ gint xs_pstrcat(gchar **result, const gchar *str) { /* Check the string pointers */ if (!result || !str) return -1; if (*result != NULL) { *result = (gchar *) g_realloc(*result, strlen(*result) + strlen(str) + 1); if (*result == NULL) return -1; strcat(*result, str); } else { *result = (gchar *) g_malloc(strlen(str) + 1); if (*result == NULL) return -1; strcpy(*result, str); } return 0; } /* Concatenate a given string up to given dest size or \n. * If size max is reached, change the end to "..." */ void xs_pnstrcat(gchar *dest, const size_t size, const gchar *str) { size_t i, n; const gchar *s; gchar *d; for (d = dest, i = 0; *d && i < size; i++, d++); s = str; while (*s && *s != '\n' && i < size) { *d = *s; d++; s++; i++; } *d = 0; if (i >= size) { i--; d--; for (n = 3; i > 0 && n > 0; d--, i--, n--) *d = '.'; } } /* Locate character in string */ void xs_findnext(const gchar *str, size_t *pos) { while (str[*pos] && isspace(str[*pos])) (*pos)++; } void xs_findeol(const gchar *str, size_t *pos) { while (str[*pos] && (str[*pos] != '\n') && (str[*pos] != '\r')) (*pos)++; } void xs_findnum(const gchar *str, size_t *pos) { while (str[*pos] && isdigit(str[*pos])) (*pos)++; } void xs_md5_print(FILE *fp, xs_md5hash_t digest) { gint i; for (i = 0; i < XS_MD5HASH_LENGTH; i++) fprintf(fp, "%02x", digest[i]); }