From b1be90f4870a6ee3b8807b15b3e8bfe9c5573bbc Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sun, 25 Feb 2024 04:14:36 +0000
Subject: driver: added slbt_lib_get_txtfile_ctx(): plain line vector from a
text file.
---
include/slibtool/slibtool.h | 9 +++
project/common.mk | 1 +
src/driver/slbt_txtfile_ctx.c | 153 ++++++++++++++++++++++++++++++++++++
src/internal/slibtool_driver_impl.h | 10 +++
4 files changed, 173 insertions(+)
create mode 100644 src/driver/slbt_txtfile_ctx.c
diff --git a/include/slibtool/slibtool.h b/include/slibtool/slibtool.h
index 4046352..320a614 100644
--- a/include/slibtool/slibtool.h
+++ b/include/slibtool/slibtool.h
@@ -362,6 +362,11 @@ struct slbt_symlist_ctx {
const char ** symstrv;
};
+struct slbt_txtfile_ctx {
+ const char * const * path;
+ const char ** txtlinev;
+};
+
/* raw input api */
slbt_api int slbt_fs_map_input (const struct slbt_driver_ctx *,
int, const char *, int,
@@ -384,6 +389,10 @@ slbt_api int slbt_lib_get_symlist_ctx (const struct slbt_driver_ctx *, const c
slbt_api void slbt_lib_free_symlist_ctx (struct slbt_symlist_ctx *);
+slbt_api int slbt_lib_get_txtfile_ctx (const struct slbt_driver_ctx *, const char *, struct slbt_txtfile_ctx **);
+
+slbt_api void slbt_lib_free_txtfile_ctx (struct slbt_txtfile_ctx *);
+
/* command execution context api */
slbt_api int slbt_ectx_get_exec_ctx (const struct slbt_driver_ctx *, struct slbt_exec_ctx **);
slbt_api void slbt_ectx_free_exec_ctx (struct slbt_exec_ctx *);
diff --git a/project/common.mk b/project/common.mk
index 3139daa..04cf88c 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -19,6 +19,7 @@ API_SRCS = \
src/driver/slbt_link_params.c \
src/driver/slbt_split_argv.c \
src/driver/slbt_symlist_ctx.c \
+ src/driver/slbt_txtfile_ctx.c \
src/driver/slbt_version_info.c \
src/host/slbt_host_flavor.c \
src/host/slbt_host_params.c \
diff --git a/src/driver/slbt_txtfile_ctx.c b/src/driver/slbt_txtfile_ctx.c
new file mode 100644
index 0000000..12b9cff
--- /dev/null
+++ b/src/driver/slbt_txtfile_ctx.c
@@ -0,0 +1,153 @@
+/*******************************************************************/
+/* slibtool: a skinny libtool implementation, written in C */
+/* Copyright (C) 2016--2024 SysDeer Technologies, LLC */
+/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */
+/*******************************************************************/
+
+#include <ctype.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include <slibtool/slibtool.h>
+#include "slibtool_driver_impl.h"
+#include "slibtool_errinfo_impl.h"
+
+/********************************************************/
+/* Read a text file, and create an in-memory vecotr of */
+/* normalized text lines, stripped of both leading and */
+/* trailing white space. */
+/********************************************************/
+
+static int slbt_lib_free_txtfile_ctx_impl(
+ struct slbt_txtfile_ctx_impl * ctx,
+ struct slbt_input * mapinfo,
+ int ret)
+{
+ if (mapinfo)
+ slbt_fs_unmap_input(mapinfo);
+
+ if (ctx) {
+ if (ctx->pathbuf)
+ free(ctx->pathbuf);
+
+ if (ctx->txtlines)
+ free(ctx->txtlines);
+
+ if (ctx->txtlinev)
+ free(ctx->txtlinev);
+
+ free(ctx);
+ }
+
+ return ret;
+}
+
+int slbt_lib_get_txtfile_ctx(
+ const struct slbt_driver_ctx * dctx,
+ const char * path,
+ struct slbt_txtfile_ctx ** pctx)
+{
+ struct slbt_txtfile_ctx_impl * ctx;
+ struct slbt_input mapinfo;
+ size_t nlines;
+ char * ch;
+ char * cap;
+ char * src;
+ char * mark;
+ const char ** pline;
+ char dummy;
+ int cint;
+
+ /* map txtfile file temporarily */
+ if (slbt_fs_map_input(dctx,-1,path,PROT_READ,&mapinfo) < 0)
+ return SLBT_NESTED_ERROR(dctx);
+
+ /* alloc context */
+ if (!(ctx = calloc(1,sizeof(*ctx))))
+ return slbt_lib_free_txtfile_ctx_impl(
+ ctx,&mapinfo,
+ SLBT_BUFFER_ERROR(dctx));
+
+ /* count lines */
+ src = mapinfo.size ? mapinfo.addr : &dummy;
+ cap = &src[mapinfo.size];
+
+ for (; (src<cap) && isspace((cint=*src)); )
+ src++;
+
+ for (ch=src,nlines=0; ch<cap; ch++)
+ nlines += (*ch == '\n');
+
+ nlines += (ch[-1] != '\n');
+
+ /* clone path, alloc string buffer and line vector */
+ if (!(ctx->pathbuf = strdup(path)))
+ return slbt_lib_free_txtfile_ctx_impl(
+ ctx,&mapinfo,
+ SLBT_SYSTEM_ERROR(dctx,0));
+
+ if (!(ctx->txtlines = calloc(mapinfo.size+1,1)))
+ return slbt_lib_free_txtfile_ctx_impl(
+ ctx,&mapinfo,
+ SLBT_SYSTEM_ERROR(dctx,0));
+
+ if (!(ctx->txtlinev = calloc(nlines+1,sizeof(char *))))
+ return slbt_lib_free_txtfile_ctx_impl(
+ ctx,&mapinfo,
+ SLBT_SYSTEM_ERROR(dctx,0));
+
+ /* copy the source to the allocated string buffer */
+ memcpy(ctx->txtlines,mapinfo.addr,mapinfo.size);
+ slbt_fs_unmap_input(&mapinfo);
+
+ /* populate the line vector, handle whitespace */
+ src = ctx->txtlines;
+ cap = &src[mapinfo.size];
+
+ for (; (src<cap) && isspace((cint=*src)); )
+ *src++ = '\0';
+
+ for (ch=src,pline=ctx->txtlinev; ch<cap; pline++) {
+ for (; (ch<cap) && isspace((cint = *ch)); )
+ ch++;
+
+ if (ch < cap)
+ *pline = ch;
+
+ for (; (ch<cap) && (*ch != '\n'); )
+ ch++;
+
+ mark = ch;
+
+ for (--ch; (ch > *pline) && isspace((cint = *ch)); ch--)
+ *ch = '\0';
+
+ if ((ch = mark) < cap)
+ *ch++ = '\0';
+ }
+
+ /* all done */
+ ctx->dctx = dctx;
+ ctx->path = ctx->pathbuf;
+ ctx->tctx.path = &ctx->path;
+ ctx->tctx.txtlinev = ctx->txtlinev;
+
+ *pctx = &ctx->tctx;
+
+ return 0;
+}
+
+void slbt_lib_free_txtfile_ctx(struct slbt_txtfile_ctx * ctx)
+{
+ struct slbt_txtfile_ctx_impl * ictx;
+ uintptr_t addr;
+
+ if (ctx) {
+ addr = (uintptr_t)ctx - offsetof(struct slbt_txtfile_ctx_impl,tctx);
+ ictx = (struct slbt_txtfile_ctx_impl *)addr;
+ slbt_lib_free_txtfile_ctx_impl(ictx,0,0);
+ }
+}
diff --git a/src/internal/slibtool_driver_impl.h b/src/internal/slibtool_driver_impl.h
index 5a00a3c..fcb8324 100644
--- a/src/internal/slibtool_driver_impl.h
+++ b/src/internal/slibtool_driver_impl.h
@@ -198,6 +198,16 @@ struct slbt_symlist_ctx_impl {
};
+struct slbt_txtfile_ctx_impl {
+ const struct slbt_driver_ctx * dctx;
+ const char * path;
+ char * pathbuf;
+ char * txtlines;
+ const char ** txtlinev;
+ struct slbt_txtfile_ctx tctx;
+};
+
+
const char * slbt_program_name(const char *);
--
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