diff options
Diffstat (limited to 'convert.c')
| -rw-r--r-- | convert.c | 191 |
1 files changed, 127 insertions, 64 deletions
@@ -1,4 +1,6 @@ #include "cache.h" +#include "attr.h" + /* * convert.c - convert a file when checking it out and checking it in. * @@ -8,6 +10,11 @@ * translation when the "auto_crlf" option is set. */ +#define CRLF_GUESS (-1) +#define CRLF_BINARY 0 +#define CRLF_TEXT 1 +#define CRLF_INPUT 2 + struct text_stat { /* CR, LF and CRLF counts */ unsigned cr, lf, crlf; @@ -72,115 +79,171 @@ static int is_binary(unsigned long size, struct text_stat *stats) return 0; } -int convert_to_git(const char *path, char **bufp, unsigned long *sizep) +static char *crlf_to_git(const char *path, const char *src, unsigned long *sizep, int action) { - char *buffer, *nbuf; + char *buffer, *dst; unsigned long size, nsize; struct text_stat stats; - /* - * FIXME! Other pluggable conversions should go here, - * based on filename patterns. Right now we just do the - * stupid auto-CRLF one. - */ - if (!auto_crlf) - return 0; + if ((action == CRLF_BINARY) || (action == CRLF_GUESS && !auto_crlf)) + return NULL; size = *sizep; if (!size) - return 0; - buffer = *bufp; + return NULL; - gather_stats(buffer, size, &stats); + gather_stats(src, size, &stats); /* No CR? Nothing to convert, regardless. */ if (!stats.cr) - return 0; - - /* - * We're currently not going to even try to convert stuff - * that has bare CR characters. Does anybody do that crazy - * stuff? - */ - if (stats.cr != stats.crlf) - return 0; - - /* - * And add some heuristics for binary vs text, of course... - */ - if (is_binary(size, &stats)) - return 0; + return NULL; + + if (action == CRLF_GUESS) { + /* + * We're currently not going to even try to convert stuff + * that has bare CR characters. Does anybody do that crazy + * stuff? + */ + if (stats.cr != stats.crlf) + return NULL; + + /* + * And add some heuristics for binary vs text, of course... + */ + if (is_binary(size, &stats)) + return NULL; + } /* - * Ok, allocate a new buffer, fill it in, and return true - * to let the caller know that we switched buffers on it. + * Ok, allocate a new buffer, fill it in, and return it + * to let the caller know that we switched buffers. */ nsize = size - stats.crlf; - nbuf = xmalloc(nsize); - *bufp = nbuf; + buffer = xmalloc(nsize); *sizep = nsize; - do { - unsigned char c = *buffer++; - if (c != '\r') - *nbuf++ = c; - } while (--size); - return 1; + dst = buffer; + if (action == CRLF_GUESS) { + /* + * If we guessed, we already know we rejected a file with + * lone CR, and we can strip a CR without looking at what + * follow it. + */ + do { + unsigned char c = *src++; + if (c != '\r') + *dst++ = c; + } while (--size); + } else { + do { + unsigned char c = *src++; + if (! (c == '\r' && (1 < size && *src == '\n'))) + *dst++ = c; + } while (--size); + } + + return buffer; } -int convert_to_working_tree(const char *path, char **bufp, unsigned long *sizep) +static char *crlf_to_worktree(const char *path, const char *src, unsigned long *sizep, int action) { - char *buffer, *nbuf; + char *buffer, *dst; unsigned long size, nsize; struct text_stat stats; unsigned char last; - /* - * FIXME! Other pluggable conversions should go here, - * based on filename patterns. Right now we just do the - * stupid auto-CRLF one. - */ - if (auto_crlf <= 0) - return 0; + if ((action == CRLF_BINARY) || (action == CRLF_INPUT) || + (action == CRLF_GUESS && auto_crlf <= 0)) + return NULL; size = *sizep; if (!size) - return 0; - buffer = *bufp; + return NULL; - gather_stats(buffer, size, &stats); + gather_stats(src, size, &stats); /* No LF? Nothing to convert, regardless. */ if (!stats.lf) - return 0; + return NULL; /* Was it already in CRLF format? */ if (stats.lf == stats.crlf) - return 0; + return NULL; - /* If we have any bare CR characters, we're not going to touch it */ - if (stats.cr != stats.crlf) - return 0; + if (action == CRLF_GUESS) { + /* If we have any bare CR characters, we're not going to touch it */ + if (stats.cr != stats.crlf) + return NULL; - if (is_binary(size, &stats)) - return 0; + if (is_binary(size, &stats)) + return NULL; + } /* - * Ok, allocate a new buffer, fill it in, and return true - * to let the caller know that we switched buffers on it. + * Ok, allocate a new buffer, fill it in, and return it + * to let the caller know that we switched buffers. */ nsize = size + stats.lf - stats.crlf; - nbuf = xmalloc(nsize); - *bufp = nbuf; + buffer = xmalloc(nsize); *sizep = nsize; last = 0; + + dst = buffer; do { - unsigned char c = *buffer++; + unsigned char c = *src++; if (c == '\n' && last != '\r') - *nbuf++ = '\r'; - *nbuf++ = c; + *dst++ = '\r'; + *dst++ = c; last = c; } while (--size); - return 1; + return buffer; +} + +static void setup_convert_check(struct git_attr_check *check) +{ + static struct git_attr *attr_crlf; + + if (!attr_crlf) + attr_crlf = git_attr("crlf", 4); + check->attr = attr_crlf; +} + +static int git_path_check_crlf(const char *path, struct git_attr_check *check) +{ + const char *value = check->value; + + if (ATTR_TRUE(value)) + return CRLF_TEXT; + else if (ATTR_FALSE(value)) + return CRLF_BINARY; + else if (ATTR_UNSET(value)) + ; + else if (!strcmp(value, "input")) + return CRLF_INPUT; + return CRLF_GUESS; +} + +char *convert_to_git(const char *path, const char *src, unsigned long *sizep) +{ + struct git_attr_check check[1]; + int crlf = CRLF_GUESS; + + setup_convert_check(check); + if (!git_checkattr(path, 1, check)) { + crlf = git_path_check_crlf(path, check); + } + return crlf_to_git(path, src, sizep, crlf); +} + +char *convert_to_working_tree(const char *path, const char *src, unsigned long *sizep) +{ + struct git_attr_check check[1]; + int crlf = CRLF_GUESS; + + setup_convert_check(check); + if (!git_checkattr(path, 1, check)) { + crlf = git_path_check_crlf(path, check); + } + return crlf_to_worktree(path, src, sizep, crlf); } |