cregit-Linux how code gets into the kernel

Release 4.7 scripts/dtc/srcpos.c

Directory: scripts/dtc
/*
 * 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"

/* A node in our list of directories to search for source/include files */

struct search_path {
	
struct search_path *next;	/* next node in list, NULL for end */
	
const char *dirname;		/* name of directory to search */
};

/* This is the list of directories that we search for source files */


static struct search_path *search_path_head, **search_path_tail;



static char *get_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; }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio4665.71%125.00%
david gibsondavid gibson2332.86%250.00%
rob herringrob herring11.43%125.00%
Total70100.00%4100.00%

FILE *depfile; /* = NULL */ struct srcfile_state *current_srcfile; /* = NULL */ /* Detect infinite include recursion. */ #define MAX_SRCFILE_DEPTH (100) static int srcfile_depth; /* = 0 */ /** * Try to open a file in a given directory. * * If the filename is an absolute path, then dirname is ignored. If it is a * relative path, then we look in that directory for the file. * * @param dirname Directory to look in, or NULL for none * @param fname Filename to look for * @param fp Set to NULL if file did not open * @return allocated filename on success (caller must free), NULL on failure */
static char *try_open(const char *dirname, const char *fname, FILE **fp) { char *fullname; if (!dirname || fname[0] == '/') fullname = xstrdup(fname); else fullname = join_path(dirname, fname); *fp = fopen(fullname, "rb"); if (!*fp) { free(fullname); fullname = NULL; } return fullname; }

Contributors

PersonTokensPropCommitsCommitProp
stephen warrenstephen warren5665.88%120.00%
john bonesiojohn bonesio2124.71%120.00%
david gibsondavid gibson78.24%240.00%
rob herringrob herring11.18%120.00%
Total85100.00%5100.00%

/** * Open a file for read access * * If it is a relative filename, we search the full search path for it. * * @param fname Filename to open * @param fp Returns pointer to opened FILE, or NULL on failure * @return pointer to allocated filename, which caller must free */
static char *fopen_any_on_path(const char *fname, FILE **fp) { const char *cur_dir = NULL; struct search_path *node; char *fullname; /* Try current directory first */ assert(fp); if (current_srcfile) cur_dir = current_srcfile->dir; fullname = try_open(cur_dir, fname, fp); /* Failing that, try each search path in turn */ for (node = search_path_head; !*fp && node; node = node->next) fullname = try_open(node->dirname, fname, fp); return fullname; }

Contributors

PersonTokensPropCommitsCommitProp
stephen warrenstephen warren7477.89%125.00%
john bonesiojohn bonesio1313.68%125.00%
david gibsondavid gibson88.42%250.00%
Total95100.00%4100.00%


FILE *srcfile_relative_open(const char *fname, char **fullnamep) { FILE *f; char *fullname; if (streq(fname, "-")) { f = stdin; fullname = xstrdup("<stdin>"); } else { fullname = fopen_any_on_path(fname, &f); 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; }

Contributors

PersonTokensPropCommitsCommitProp
stephen warrenstephen warren6358.88%240.00%
john bonesiojohn bonesio2422.43%120.00%
david gibsondavid gibson2018.69%240.00%
Total107100.00%5100.00%


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 = get_dirname(srcfile->name); srcfile->prev = current_srcfile; srcfile->lineno = 1; srcfile->colno = 1; current_srcfile = srcfile; }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio4755.29%125.00%
david gibsondavid gibson3743.53%250.00%
rob herringrob herring11.18%125.00%
Total85100.00%4100.00%


bool 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 ? true : false; }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio4580.36%125.00%
david gibsondavid gibson814.29%250.00%
rob herringrob herring35.36%125.00%
Total56100.00%4100.00%


void srcfile_add_search_path(const char *dirname) { struct search_path *node; /* Create the node */ node = xmalloc(sizeof(*node)); node->next = NULL; node->dirname = xstrdup(dirname); /* Add to the end of our list */ if (search_path_tail) *search_path_tail = node; else search_path_head = node; search_path_tail = &node->next; }

Contributors

PersonTokensPropCommitsCommitProp
stephen warrenstephen warren64100.00%1100.00%
Total64100.00%1100.00%

/* * 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; }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio10683.46%133.33%
david gibsondavid gibson2116.54%266.67%
Total127100.00%3100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio3886.36%150.00%
david gibsondavid gibson613.64%150.00%
Total44100.00%2100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio76100.00%1100.00%
Total76100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio12283.56%133.33%
david gibsondavid gibson2416.44%266.67%
Total146100.00%3100.00%


void srcpos_verror(struct srcpos *pos, const char *prefix, const char *fmt, va_list va) { char *srcstr; srcstr = srcpos_string(pos); fprintf(stderr, "%s: %s ", prefix, srcstr); vfprintf(stderr, fmt, va); fprintf(stderr, "\n"); free(srcstr); }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio4771.21%125.00%
rob herringrob herring1116.67%125.00%
david gibsondavid gibson57.58%125.00%
grant likelygrant likely34.55%125.00%
Total66100.00%4100.00%


void srcpos_error(struct srcpos *pos, const char *prefix, const char *fmt, ...) { va_list va; va_start(va, fmt); srcpos_verror(pos, prefix, fmt, va); va_end(va); }

Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio3470.83%125.00%
rob herringrob herring816.67%125.00%
david gibsondavid gibson612.50%250.00%
Total48100.00%4100.00%


void srcpos_set_line(char *f, int l) { current_srcfile->name = f; current_srcfile->lineno = l; }

Contributors

PersonTokensPropCommitsCommitProp
stephen warrenstephen warren24100.00%1100.00%
Total24100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
john bonesiojohn bonesio67656.62%114.29%
stephen warrenstephen warren31726.55%228.57%
david gibsondavid gibson17314.49%228.57%
rob herringrob herring252.09%114.29%
grant likelygrant likely30.25%114.29%
Total1194100.00%7100.00%
Directory: scripts/dtc
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