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util.cpp
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util.cpp
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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "util.hpp"
#include "source_str.hpp"
#include "iostream.hpp"
#include "string_buf.hpp"
#include "hash-t.hpp"
#include "parse_common.hpp"
#include <algorithm>
//
//
//
int cmp(const char * x, unsigned x_sz, const char * y, unsigned y_sz) {
if (x_sz == y_sz) {
return memcmp(x, y, x_sz);
} else if (x_sz < y_sz) {
int res = memcmp(x, y, x_sz);
if (res == 0) return -1;
return res;
} else {
int res = memcmp(x, y, y_sz);
if (res == 0) return 1;
return res;
}
}
//
//
//
// void SourceInfo::dump_info(OStream & o, AlreadySeen & as, const char * prefix) const {
// bool seen_self = as.have(this);
// as.insert(this);
// StringBuf buf;
// bool dump_parents = dump_info_self(buf);
// String str = buf.freeze();
// if (!str.empty()) {
// if (seen_self)
// o << prefix << "[" << str << "]\n";
// else
// o << prefix << str << "\n";
// }
// if (parent && !seen_self && dump_parents)
// parent->dump_info(o, as, prefix);
// }
// void SourceInfo::dump_info(OStream & o, const char * prefix) const {
// AlreadySeen as;
// dump_info(o, as, prefix);
// }
struct StringObj1 {
unsigned size;
char str[1];
};
const StringObj1 EMPTY_STRING_OBJ1 = {0, {'\0'}};
void pos_to_str(Pos p, OStream & buf) {
if (p.name.empty())
buf.write("<anon>");
else
buf.write(p.name);
if (p.line == NPOS)
;//buf.write(":");
else if (p.col == NPOS)
buf.printf(":%u", p.line);
else
buf.printf(":%u:%u", p.line, p.col);
}
const BacktraceInfo SourceBlock::PLACEHOLDER(BacktraceInfo::NONE);
void SourceFile::read(String file) {
file_name_ = file;
int fd = open(file.c_str(), O_RDONLY);
if (fd <= 0) {
fprintf(stderr, "SourceFile::read(): Unable to open file \"%s\" for reading\n", ~file);
abort();
}
read(fd);
}
void SourceFile::read(int fd) {
static const unsigned BLOCK_SIZE = 1024*16;
char * d = (char *)malloc(BLOCK_SIZE);
unsigned capacity = BLOCK_SIZE;
size_ = 0;
ssize_t s;
while (s = ::read(fd, d + size_, BLOCK_SIZE), s) {
size_ += s;
if (size_ + BLOCK_SIZE > capacity) {
capacity *= 2;
d = (char *)realloc(d, capacity);
}
}
d = (char *)realloc(d, size_+1);
d[size_] = '\0';
data_ = d;
lines_.push_back(data_);
bool new_line = true;
bool need_push = true;
for (char * s = data_; *s; ++s) {
if (new_line) {
if (pp_mode && *s == '#') {
if (s[1] != ' ') continue;
SourceChange sc;
sc.idx = s; // the idx is the start of the line
++s;
sc.lineno = strtoul(s, &s, 10);
++s;
assert(*s == '"');
++s;
char * begin = s;
while (*s && *s != '"') {
if (*s == '\\') {
++s;
assert(*s);
}
++s;
}
assert(*s == '"');
sc.file_name = String(begin,s);
while (*s && *s != '\n') ++s;
if (need_push)
source_change.push_back(sc);
else
source_change.back() = sc;
memset((void *)sc.idx, ' ', s - sc.idx); // blank line
need_push = false; // if the next line is also a line control
// line just overwrite this one
} else if (pp_mode) {
need_push = true;
}
new_line = true;
}
if (*s == '\n') {
lines_.push_back(s+1);
new_line = true;
}
}
base_block.box = SourceStr(this);
}
struct SourceChangeLt {
bool operator() (const SourceFile::SourceChange & x, const SourceFile::SourceChange & y)
{return x.idx < y.idx;}
bool operator() (const char * x, const SourceFile::SourceChange & y)
{return x < y.idx;}
bool operator() (const SourceFile::SourceChange & x, const char * y)
{return x.idx < y;}
};
Pos SourceFile::get_pos(const char * s) const {
if (s < data_ || s > data_ + size_ + 1) {
return Pos(file_name_, NPOS, NPOS);
}
Vector<const char *>::const_iterator l = lower_bound(lines_.begin(), lines_.end(), s);
if (*l != s) --l;
if (!pp_mode) return Pos(file_name_, l - lines_.begin() + 1, s - *l + 1);
Vector<SourceChange>::const_iterator sc = lower_bound(source_change.begin(), source_change.end(),
s, SourceChangeLt());
if (sc->idx != s) --sc;
Vector<const char *>::const_iterator sc_l = lower_bound(lines_.begin(), lines_.end(), sc->idx);
if (*sc_l != sc->idx) --sc_l;
assert(sc_l <= l);
unsigned line_offset = l - sc_l - 1;
return Pos(sc->file_name, sc->lineno + line_offset, NPOS);
}
String add_dir_if_needed(String file, const SourceFile * included_from) {
if (file[0] == '/') {
return file;
} else {
StringBuf buf;
if (included_from) {
const char * ifn = ~included_from->file_name();
const char * slash = strrchr(ifn, '/');
if (slash)
buf.append(ifn, slash + 1);
buf.append(file);
} else {
char buf2[1024];
char * wd = getcwd(buf2, 1024);
buf.append(wd);
buf.append('/');
buf.append(file);
}
return buf.freeze();
}
}
SourceFile * new_source_file(String file, const SourceFile * included_from, bool pp_mode) {
return new SourceFile(add_dir_if_needed(file, included_from), pp_mode);
}
SourceFile * new_source_file(int fd, bool pp_mode) {
return new SourceFile(fd, pp_mode);
}