diff options
| -rw-r--r-- | include/slibtool/slibtool.h | 9 | ||||
| -rw-r--r-- | project/common.mk | 1 | ||||
| -rw-r--r-- | src/driver/slbt_txtfile_ctx.c | 153 | ||||
| -rw-r--r-- | src/internal/slibtool_driver_impl.h | 10 |
4 files changed, 173 insertions, 0 deletions
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 *); |