diff options
Diffstat (limited to 'scripts/dtc/srcpos.c')
| -rw-r--r-- | scripts/dtc/srcpos.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/scripts/dtc/srcpos.c b/scripts/dtc/srcpos.c new file mode 100644 index 00000000..36a38e9f --- /dev/null +++ b/scripts/dtc/srcpos.c @@ -0,0 +1,252 @@ +/* + * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + */ + +#define _GNU_SOURCE + +#include <stdio.h> + +#include "dtc.h" +#include "srcpos.h" + + +static char *dirname(const char *path) +{ + const char *slash = strrchr(path, '/'); + + if (slash) { + int len = slash - path; + char *dir = xmalloc(len + 1); + + memcpy(dir, path, len); + dir[len] = '\0'; + return dir; + } + return NULL; +} + +FILE *depfile; /* = NULL */ +struct srcfile_state *current_srcfile; /* = NULL */ + +/* Detect infinite include recursion. */ +#define MAX_SRCFILE_DEPTH (100) +static int srcfile_depth; /* = 0 */ + +FILE *srcfile_relative_open(const char *fname, char **fullnamep) +{ + FILE *f; + char *fullname; + + if (streq(fname, "-")) { + f = stdin; + fullname = xstrdup("<stdin>"); + } else { + if (!current_srcfile || !current_srcfile->dir + || (fname[0] == '/')) + fullname = xstrdup(fname); + else + fullname = join_path(current_srcfile->dir, fname); + + f = fopen(fullname, "r"); + if (!f) + die("Couldn't open \"%s\": %s\n", fname, + strerror(errno)); + } + + if (depfile) + fprintf(depfile, " %s", fullname); + + if (fullnamep) + *fullnamep = fullname; + else + free(fullname); + + return f; +} + +void srcfile_push(const char *fname) +{ + struct srcfile_state *srcfile; + + if (srcfile_depth++ >= MAX_SRCFILE_DEPTH) + die("Includes nested too deeply"); + + srcfile = xmalloc(sizeof(*srcfile)); + + srcfile->f = srcfile_relative_open(fname, &srcfile->name); + srcfile->dir = dirname(srcfile->name); + srcfile->prev = current_srcfile; + + srcfile->lineno = 1; + srcfile->colno = 1; + + current_srcfile = srcfile; +} + +int srcfile_pop(void) +{ + struct srcfile_state *srcfile = current_srcfile; + + assert(srcfile); + + current_srcfile = srcfile->prev; + + if (fclose(srcfile->f)) + die("Error closing \"%s\": %s\n", srcfile->name, + strerror(errno)); + + /* FIXME: We allow the srcfile_state structure to leak, + * because it could still be referenced from a location + * variable being carried through the parser somewhere. To + * fix this we could either allocate all the files from a + * table, or use a pool allocator. */ + + return current_srcfile ? 1 : 0; +} + +/* + * The empty source position. + */ + +struct srcpos srcpos_empty = { + .first_line = 0, + .first_column = 0, + .last_line = 0, + .last_column = 0, + .file = NULL, +}; + +#define TAB_SIZE 8 + +void srcpos_update(struct srcpos *pos, const char *text, int len) +{ + int i; + + pos->file = current_srcfile; + + pos->first_line = current_srcfile->lineno; + pos->first_column = current_srcfile->colno; + + for (i = 0; i < len; i++) + if (text[i] == '\n') { + current_srcfile->lineno++; + current_srcfile->colno = 1; + } else if (text[i] == '\t') { + current_srcfile->colno = + ALIGN(current_srcfile->colno, TAB_SIZE); + } else { + current_srcfile->colno++; + } + + pos->last_line = current_srcfile->lineno; + pos->last_column = current_srcfile->colno; +} + +struct srcpos * +srcpos_copy(struct srcpos *pos) +{ + struct srcpos *pos_new; + + pos_new = xmalloc(sizeof(struct srcpos)); + memcpy(pos_new, pos, sizeof(struct srcpos)); + + return pos_new; +} + + + +void +srcpos_dump(struct srcpos *pos) +{ + printf("file : \"%s\"\n", + pos->file ? (char *) pos->file : "<no file>"); + printf("first_line : %d\n", pos->first_line); + printf("first_column: %d\n", pos->first_column); + printf("last_line : %d\n", pos->last_line); + printf("last_column : %d\n", pos->last_column); + printf("file : %s\n", pos->file->name); +} + + +char * +srcpos_string(struct srcpos *pos) +{ + const char *fname = "<no-file>"; + char *pos_str; + int rc; + + if (pos) + fname = pos->file->name; + + + if (pos->first_line != pos->last_line) + rc = asprintf(&pos_str, "%s:%d.%d-%d.%d", fname, + pos->first_line, pos->first_column, + pos->last_line, pos->last_column); + else if (pos->first_column != pos->last_column) + rc = asprintf(&pos_str, "%s:%d.%d-%d", fname, + pos->first_line, pos->first_column, + pos->last_column); + else + rc = asprintf(&pos_str, "%s:%d.%d", fname, + pos->first_line, pos->first_column); + + if (rc == -1) + die("Couldn't allocate in srcpos string"); + + return pos_str; +} + +void +srcpos_verror(struct srcpos *pos, char const *fmt, va_list va) +{ + const char *srcstr; + + srcstr = srcpos_string(pos); + + fprintf(stdout, "Error: %s ", srcstr); + vfprintf(stdout, fmt, va); + fprintf(stdout, "\n"); +} + +void +srcpos_error(struct srcpos *pos, char const *fmt, ...) +{ + va_list va; + + va_start(va, fmt); + srcpos_verror(pos, fmt, va); + va_end(va); +} + + +void +srcpos_warn(struct srcpos *pos, char const *fmt, ...) +{ + const char *srcstr; + va_list va; + va_start(va, fmt); + + srcstr = srcpos_string(pos); + + fprintf(stderr, "Warning: %s ", srcstr); + vfprintf(stderr, fmt, va); + fprintf(stderr, "\n"); + + va_end(va); +} |