diff options
Diffstat (limited to 'Modules/zlib/minigzip.c')
| -rw-r--r-- | Modules/zlib/minigzip.c | 213 |
1 files changed, 212 insertions, 1 deletions
diff --git a/Modules/zlib/minigzip.c b/Modules/zlib/minigzip.c index 9825ccc..b3025a4 100644 --- a/Modules/zlib/minigzip.c +++ b/Modules/zlib/minigzip.c @@ -1,5 +1,5 @@ /* minigzip.c -- simulate gzip using the zlib compression library - * Copyright (C) 1995-2006, 2010 Jean-loup Gailly. + * Copyright (C) 1995-2006, 2010, 2011 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -40,6 +40,10 @@ # define SET_BINARY_MODE(file) #endif +#ifdef _MSC_VER +# define snprintf _snprintf +#endif + #ifdef VMS # define unlink delete # define GZ_SUFFIX "-gz" @@ -138,6 +142,197 @@ static void pwinerror (s) # define local #endif +#ifdef Z_SOLO +/* for Z_SOLO, create simplified gz* functions using deflate and inflate */ + +#if defined(Z_HAVE_UNISTD_H) || defined(Z_LARGE) +# include <unistd.h> /* for unlink() */ +#endif + +void *myalloc OF((void *, unsigned, unsigned)); +void myfree OF((void *, void *)); + +void *myalloc(q, n, m) + void *q; + unsigned n, m; +{ + q = Z_NULL; + return calloc(n, m); +} + +void myfree(q, p) + void *q, *p; +{ + q = Z_NULL; + free(p); +} + +typedef struct gzFile_s { + FILE *file; + int write; + int err; + char *msg; + z_stream strm; +} *gzFile; + +gzFile gzopen OF((const char *, const char *)); +gzFile gzdopen OF((int, const char *)); +gzFile gz_open OF((const char *, int, const char *)); + +gzFile gzopen(path, mode) +const char *path; +const char *mode; +{ + return gz_open(path, -1, mode); +} + +gzFile gzdopen(fd, mode) +int fd; +const char *mode; +{ + return gz_open(NULL, fd, mode); +} + +gzFile gz_open(path, fd, mode) + const char *path; + int fd; + const char *mode; +{ + gzFile gz; + int ret; + + gz = malloc(sizeof(struct gzFile_s)); + if (gz == NULL) + return NULL; + gz->write = strchr(mode, 'w') != NULL; + gz->strm.zalloc = myalloc; + gz->strm.zfree = myfree; + gz->strm.opaque = Z_NULL; + if (gz->write) + ret = deflateInit2(&(gz->strm), -1, 8, 15 + 16, 8, 0); + else { + gz->strm.next_in = 0; + gz->strm.avail_in = Z_NULL; + ret = inflateInit2(&(gz->strm), 15 + 16); + } + if (ret != Z_OK) { + free(gz); + return NULL; + } + gz->file = path == NULL ? fdopen(fd, gz->write ? "wb" : "rb") : + fopen(path, gz->write ? "wb" : "rb"); + if (gz->file == NULL) { + gz->write ? deflateEnd(&(gz->strm)) : inflateEnd(&(gz->strm)); + free(gz); + return NULL; + } + gz->err = 0; + gz->msg = ""; + return gz; +} + +int gzwrite OF((gzFile, const void *, unsigned)); + +int gzwrite(gz, buf, len) + gzFile gz; + const void *buf; + unsigned len; +{ + z_stream *strm; + unsigned char out[BUFLEN]; + + if (gz == NULL || !gz->write) + return 0; + strm = &(gz->strm); + strm->next_in = (void *)buf; + strm->avail_in = len; + do { + strm->next_out = out; + strm->avail_out = BUFLEN; + (void)deflate(strm, Z_NO_FLUSH); + fwrite(out, 1, BUFLEN - strm->avail_out, gz->file); + } while (strm->avail_out == 0); + return len; +} + +int gzread OF((gzFile, void *, unsigned)); + +int gzread(gz, buf, len) + gzFile gz; + void *buf; + unsigned len; +{ + int ret; + unsigned got; + unsigned char in[1]; + z_stream *strm; + + if (gz == NULL || gz->write) + return 0; + if (gz->err) + return 0; + strm = &(gz->strm); + strm->next_out = (void *)buf; + strm->avail_out = len; + do { + got = fread(in, 1, 1, gz->file); + if (got == 0) + break; + strm->next_in = in; + strm->avail_in = 1; + ret = inflate(strm, Z_NO_FLUSH); + if (ret == Z_DATA_ERROR) { + gz->err = Z_DATA_ERROR; + gz->msg = strm->msg; + return 0; + } + if (ret == Z_STREAM_END) + inflateReset(strm); + } while (strm->avail_out); + return len - strm->avail_out; +} + +int gzclose OF((gzFile)); + +int gzclose(gz) + gzFile gz; +{ + z_stream *strm; + unsigned char out[BUFLEN]; + + if (gz == NULL) + return Z_STREAM_ERROR; + strm = &(gz->strm); + if (gz->write) { + strm->next_in = Z_NULL; + strm->avail_in = 0; + do { + strm->next_out = out; + strm->avail_out = BUFLEN; + (void)deflate(strm, Z_FINISH); + fwrite(out, 1, BUFLEN - strm->avail_out, gz->file); + } while (strm->avail_out == 0); + deflateEnd(strm); + } + else + inflateEnd(strm); + fclose(gz->file); + free(gz); + return Z_OK; +} + +const char *gzerror OF((gzFile, int *)); + +const char *gzerror(gz, err) + gzFile gz; + int *err; +{ + *err = gz->err; + return gz->msg; +} + +#endif + char *prog; void error OF((const char *msg)); @@ -272,8 +467,12 @@ void file_compress(file, mode) exit(1); } +#if !defined(NO_snprintf) && !defined(NO_vsnprintf) + snprintf(outfile, sizeof(outfile), "%s%s", file, GZ_SUFFIX); +#else strcpy(outfile, file); strcat(outfile, GZ_SUFFIX); +#endif in = fopen(file, "rb"); if (in == NULL) { @@ -308,7 +507,11 @@ void file_uncompress(file) exit(1); } +#if !defined(NO_snprintf) && !defined(NO_vsnprintf) + snprintf(buf, sizeof(buf), "%s", file); +#else strcpy(buf, file); +#endif if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) { infile = file; @@ -317,7 +520,11 @@ void file_uncompress(file) } else { outfile = file; infile = buf; +#if !defined(NO_snprintf) && !defined(NO_vsnprintf) + snprintf(buf + len, sizeof(buf) - len, "%s", GZ_SUFFIX); +#else strcat(infile, GZ_SUFFIX); +#endif } in = gzopen(infile, "rb"); if (in == NULL) { @@ -355,7 +562,11 @@ int main(argc, argv) gzFile file; char *bname, outmode[20]; +#if !defined(NO_snprintf) && !defined(NO_vsnprintf) + snprintf(outmode, sizeof(outmode), "%s", "wb6 "); +#else strcpy(outmode, "wb6 "); +#endif prog = argv[0]; bname = strrchr(argv[0], '/'); |